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2025-10-10libstdc++: Implement P3235R3 optimizations for std::print [PR121790]Tomasz Kamiński
This patch implements additional enable_nonlocking_formatter_optimization specializations listed in P3235R3. PR libstdc++/121790 libstdc++-v3/ChangeLog: * include/bits/chrono_io.h (enable_nonlocking_formatter_optimization): Define specializations for chrono types. * include/bits/version.def (print): Bump. * include/bits/version.h: Regenerate. * include/std/format (enable_nonlocking_formatter_optimization): Define specializations for pair, tuple and ranges. * include/std/queue (enable_nonlocking_formatter_optimization): Define specializations for queue and priority_queue. * include/std/stack (enable_nonlocking_formatter_optimization): Define specialization for stack. * include/std/stacktrace (enable_nonlocking_formatter_optimization): Define specialization for basic_stacktrace and stacktrace_entry. * include/std/thread (enable_nonlocking_formatter_optimization): Define specialization for thread::id. * include/std/vector (enable_nonlocking_formatter_optimization): Define specialization for vector<bool>::reference. * testsuite/23_containers/vector/bool/format.cc: Test value of enable_nonlocking_formatter_optimization. * testsuite/30_threads/thread/id/output.cc: Likewise. * testsuite/std/format/ranges/adaptors.cc: Likewise. * testsuite/std/format/ranges/formatter.cc: Likewise. * testsuite/std/format/tuple.cc: Likewise. * testsuite/std/time/format/empty_spec.cc: Extract Rep class to custom_rep.h. * testsuite/std/time/format/custom_rep.h: Extracted from empty_spec.cc. * testsuite/std/time/format/nonlocking.cc: New test. Reviewed-by: Jonathan Wakely <jwakely@redhat.com>
2025-08-26libstdc++: Specialize _Never_valueless_alt for jthread, stop_token and ↵Tomasz Kamiński
stop_source The move constructors for stop_source and stop_token are equivalent to copying and clearing the raw pointer, as they are wrappers for a counted-shared state. For jthread, the move constructor performs a member-wise move of stop_source and thread. While std::thread could also have a _Never_valueless_alt specialization due to its inexpensive move (only moving a handle), doing so now would change the ABI. This patch takes the opportunity to correct this behavior for jthread, before C++20 API is marked stable. libstdc++-v3/ChangeLog: * include/std/stop_token (__variant::_Never_valueless_alt): Declare. (__variant::_Never_valueless_alt<std::stop_token>) (__variant::_Never_valueless_alt<std::stop_source>): Define. * include/std/thread: (__variant::_Never_valueless_alt): Declare. (__variant::_Never_valueless_alt<std::jthread>): Define.
2025-04-25libstdc++: Constrain formatter for thread::id [PR119918]Tomasz Kamiński
This patch add constraint __formatter::__char to _CharT type parameter of formatter<thread::id, _CharT> specialization, matching the constraint of formatting of integer/pointers that are used as native handles. The dependency on <format> header, is changed to <bits/formatfwd.h>. To achieve that, formatting of pointers is extracted from void const* specialization to internal __formatter_ptr<_CharT>, that can be forward declared. Finally, the handle representation is now printed directly to __fc.out(), by the formatter for handle type. To support this, internal formatters can now be constructed from _Spec object as alternative to invoking parse method. PR libstdc++/119918 libstdc++-v3/ChangeLog: * include/bits/formatfwd.h (__format::_Align): Moved from std/format. (std::__throw_format_error, __format::__formatter_str) (__format::__formatter_ptr): Declare. * include/std/format (__format::_Align): Moved to bits/formatfwd.h. (__formatter_int::__formatter_int): Define. (__format::__formatter_ptr): Extracted from formatter for const void*. (std::formatter<const void*, _CharT>, formatter<void*, _CharT>) (std::formatter<nullptr_t, _CharT>): Delegate to __formatter_ptr<_CharT>. * include/std/thread (std::formatter<thread::id, _CharT>): Constrain _CharT template parameter. (formatter<thread::id, _CharT>::parse): Specify default aligment, and qualify __throw_format_error to disable ADL. (formatter<thread::id, _CharT>::format): Use formatters to write directly to output. * testsuite/30_threads/thread/id/output.cc: Tests for formatting thread::id representing not-a-thread with padding and formattable concept. Reviewed-by: Jonathan Wakely <jwakely@redhat.com> Signed-off-by: Tomasz Kamiński <tkaminsk@redhat.com>
2025-02-15libstdc++: Simplify and comment std::jthread extension [PR100612]Jonathan Wakely
Use a requires-clause on the partial specialization of the __pmf_expects_stop_token variable template, which is used for the extension that allows constructing std::jthread with a pointer-to-member-function that accepts a std::stop_token argument. Also add a comment referring to the related Bugzilla PR. libstdc++-v3/ChangeLog: PR libstdc++/100612 * include/std/thread (__pmf_expects_stop_token): Constrain variable template specialization with concept. Add comment.
2025-01-02Update copyright years.Jakub Jelinek
2024-09-25libstdc++: #ifdef out #pragma GCC system_headerJason Merrill
In r15-3714-gd3a7302ec5985a I added -Wsystem-headers to the libstdc++ build flags to help catch problems in the library. This patch takes a different approach, of disabling the #pragma system_header unless _GLIBCXX_SYSHDR is defined. As a result, the testsuites will treat them as non-system-headers to get better warning coverage during regression testing of both gcc and libstdc++, not just when building the library. My rationale for the #ifdef instead of just removing the #pragma is the three G++ tests that want to test libstdc++ system header behavior, so we need a way to select it. This doesn't affect installed libraries, as they get their system-header status from the lookup path. But testsuite_flags --build-includes gives -I directives rather than -isystem. This patch doesn't change the headers in config/ because I'm not compiling with most of them, so won't see any warnings that need fixing. Adjusting them could happen later, or we can not bother. libstdc++-v3/ChangeLog: * acinclude.m4 (WARN_FLAGS): Remove -Wsystem-headers. * configure: Regenerate. * include/bits/algorithmfwd.h: #ifdef out #pragma GCC system_header. * include/bits/atomic_base.h * include/bits/atomic_futex.h * include/bits/atomic_timed_wait.h * include/bits/atomic_wait.h * include/bits/basic_ios.h * include/bits/basic_string.h * include/bits/boost_concept_check.h * include/bits/char_traits.h * include/bits/charconv.h * include/bits/chrono.h * include/bits/chrono_io.h * include/bits/codecvt.h * include/bits/concept_check.h * include/bits/cpp_type_traits.h * include/bits/elements_of.h * include/bits/enable_special_members.h * include/bits/erase_if.h * include/bits/forward_list.h * include/bits/functional_hash.h * include/bits/gslice.h * include/bits/gslice_array.h * include/bits/hashtable.h * include/bits/indirect_array.h * include/bits/invoke.h * include/bits/ios_base.h * include/bits/iterator_concepts.h * include/bits/locale_classes.h * include/bits/locale_facets.h * include/bits/locale_facets_nonio.h * include/bits/localefwd.h * include/bits/mask_array.h * include/bits/max_size_type.h * include/bits/memory_resource.h * include/bits/memoryfwd.h * include/bits/move_only_function.h * include/bits/node_handle.h * include/bits/ostream_insert.h * include/bits/out_ptr.h * include/bits/parse_numbers.h * include/bits/postypes.h * include/bits/quoted_string.h * include/bits/range_access.h * include/bits/ranges_base.h * include/bits/refwrap.h * include/bits/sat_arith.h * include/bits/semaphore_base.h * include/bits/slice_array.h * include/bits/std_abs.h * include/bits/std_function.h * include/bits/std_mutex.h * include/bits/std_thread.h * include/bits/stl_iterator_base_funcs.h * include/bits/stl_iterator_base_types.h * include/bits/stl_tree.h * include/bits/stream_iterator.h * include/bits/streambuf_iterator.h * include/bits/stringfwd.h * include/bits/this_thread_sleep.h * include/bits/unique_lock.h * include/bits/uses_allocator_args.h * include/bits/utility.h * include/bits/valarray_after.h * include/bits/valarray_array.h * include/bits/valarray_before.h * include/bits/version.h * include/c_compatibility/fenv.h * include/c_compatibility/inttypes.h * include/c_compatibility/stdint.h * include/decimal/decimal.h * include/experimental/bits/net.h * include/experimental/bits/shared_ptr.h * include/ext/aligned_buffer.h * include/ext/alloc_traits.h * include/ext/atomicity.h * include/ext/concurrence.h * include/ext/numeric_traits.h * include/ext/pod_char_traits.h * include/ext/pointer.h * include/ext/stdio_filebuf.h * include/ext/stdio_sync_filebuf.h * include/ext/string_conversions.h * include/ext/type_traits.h * include/ext/vstring.h * include/ext/vstring_fwd.h * include/ext/vstring_util.h * include/parallel/algorithmfwd.h * include/parallel/numericfwd.h * include/tr1/functional_hash.h * include/tr1/hashtable.h * include/tr1/random.h * libsupc++/exception.h * libsupc++/hash_bytes.h * include/bits/basic_ios.tcc * include/bits/basic_string.tcc * include/bits/fstream.tcc * include/bits/istream.tcc * include/bits/locale_classes.tcc * include/bits/locale_facets.tcc * include/bits/locale_facets_nonio.tcc * include/bits/ostream.tcc * include/bits/sstream.tcc * include/bits/streambuf.tcc * include/bits/string_view.tcc * include/bits/version.tpl * include/experimental/bits/string_view.tcc * include/ext/pb_ds/detail/resize_policy/hash_prime_size_policy_imp.hpp * include/ext/random.tcc * include/ext/vstring.tcc * include/tr2/bool_set.tcc * include/tr2/dynamic_bitset.tcc * include/bits/c++config * include/c/cassert * include/c/cctype * include/c/cerrno * include/c/cfloat * include/c/ciso646 * include/c/climits * include/c/clocale * include/c/cmath * include/c/csetjmp * include/c/csignal * include/c/cstdarg * include/c/cstddef * include/c/cstdio * include/c/cstdlib * include/c/cstring * include/c/ctime * include/c/cuchar * include/c/cwchar * include/c/cwctype * include/c_global/cassert * include/c_global/ccomplex * include/c_global/cctype * include/c_global/cerrno * include/c_global/cfenv * include/c_global/cfloat * include/c_global/cinttypes * include/c_global/ciso646 * include/c_global/climits * include/c_global/clocale * include/c_global/cmath * include/c_global/csetjmp * include/c_global/csignal * include/c_global/cstdalign * include/c_global/cstdarg * include/c_global/cstdbool * include/c_global/cstddef * include/c_global/cstdint * include/c_global/cstdio * include/c_global/cstdlib * include/c_global/cstring * include/c_global/ctgmath * include/c_global/ctime * include/c_global/cuchar * include/c_global/cwchar * include/c_global/cwctype * include/c_std/cassert * include/c_std/cctype * include/c_std/cerrno * include/c_std/cfloat * include/c_std/ciso646 * include/c_std/climits * include/c_std/clocale * include/c_std/cmath * include/c_std/csetjmp * include/c_std/csignal * include/c_std/cstdarg * include/c_std/cstddef * include/c_std/cstdio * include/c_std/cstdlib * include/c_std/cstring * include/c_std/ctime * include/c_std/cuchar * include/c_std/cwchar * include/c_std/cwctype * include/debug/array * include/debug/bitset * include/debug/deque * include/debug/forward_list * include/debug/list * include/debug/map * include/debug/set * include/debug/string * include/debug/unordered_map * include/debug/unordered_set * include/debug/vector * include/decimal/decimal * include/experimental/algorithm * include/experimental/any * include/experimental/array * include/experimental/buffer * include/experimental/chrono * include/experimental/contract * include/experimental/deque * include/experimental/executor * include/experimental/filesystem * include/experimental/forward_list * include/experimental/functional * include/experimental/internet * include/experimental/io_context * include/experimental/iterator * include/experimental/list * include/experimental/map * include/experimental/memory * include/experimental/memory_resource * include/experimental/net * include/experimental/netfwd * include/experimental/numeric * include/experimental/propagate_const * include/experimental/ratio * include/experimental/regex * include/experimental/scope * include/experimental/set * include/experimental/socket * include/experimental/string * include/experimental/string_view * include/experimental/synchronized_value * include/experimental/system_error * include/experimental/timer * include/experimental/tuple * include/experimental/type_traits * include/experimental/unordered_map * include/experimental/unordered_set * include/experimental/vector * include/ext/algorithm * include/ext/cmath * include/ext/functional * include/ext/iterator * include/ext/memory * include/ext/numeric * include/ext/random * include/ext/rb_tree * include/ext/rope * include/parallel/algorithm * include/std/algorithm * include/std/any * include/std/array * include/std/atomic * include/std/barrier * include/std/bit * include/std/bitset * include/std/charconv * include/std/chrono * include/std/codecvt * include/std/complex * include/std/concepts * include/std/condition_variable * include/std/coroutine * include/std/deque * include/std/execution * include/std/expected * include/std/filesystem * include/std/format * include/std/forward_list * include/std/fstream * include/std/functional * include/std/future * include/std/generator * include/std/iomanip * include/std/ios * include/std/iosfwd * include/std/iostream * include/std/istream * include/std/iterator * include/std/latch * include/std/limits * include/std/list * include/std/locale * include/std/map * include/std/memory * include/std/memory_resource * include/std/mutex * include/std/numbers * include/std/numeric * include/std/optional * include/std/ostream * include/std/print * include/std/queue * include/std/random * include/std/ranges * include/std/ratio * include/std/regex * include/std/scoped_allocator * include/std/semaphore * include/std/set * include/std/shared_mutex * include/std/span * include/std/spanstream * include/std/sstream * include/std/stack * include/std/stacktrace * include/std/stdexcept * include/std/streambuf * include/std/string * include/std/string_view * include/std/syncstream * include/std/system_error * include/std/text_encoding * include/std/thread * include/std/tuple * include/std/type_traits * include/std/typeindex * include/std/unordered_map * include/std/unordered_set * include/std/utility * include/std/valarray * include/std/variant * include/std/vector * include/std/version * include/tr1/array * include/tr1/cfenv * include/tr1/cinttypes * include/tr1/cmath * include/tr1/complex * include/tr1/cstdbool * include/tr1/cstdint * include/tr1/cstdio * include/tr1/cstdlib * include/tr1/cwchar * include/tr1/cwctype * include/tr1/functional * include/tr1/memory * include/tr1/random * include/tr1/regex * include/tr1/tuple * include/tr1/type_traits * include/tr1/unordered_map * include/tr1/unordered_set * include/tr1/utility * include/tr2/bool_set * include/tr2/dynamic_bitset * include/tr2/type_traits * libsupc++/atomic_lockfree_defines.h * libsupc++/compare * libsupc++/cxxabi.h * libsupc++/cxxabi_forced.h * libsupc++/cxxabi_init_exception.h * libsupc++/exception * libsupc++/initializer_list * libsupc++/new * libsupc++/typeinfo: Likewise. * testsuite/20_util/ratio/operations/ops_overflow_neg.cc * testsuite/23_containers/array/tuple_interface/get_neg.cc * testsuite/23_containers/vector/cons/destructible_debug_neg.cc * testsuite/24_iterators/operations/prev_neg.cc * testsuite/ext/type_traits/add_unsigned_floating_neg.cc * testsuite/ext/type_traits/add_unsigned_integer_neg.cc * testsuite/ext/type_traits/remove_unsigned_floating_neg.cc * testsuite/ext/type_traits/remove_unsigned_integer_neg.cc: Adjust line numbers. gcc/testsuite/ChangeLog * g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C * g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C * g++.dg/diagnostic/disable.C: #define _GLIBCXX_SYSHDR.
2024-05-22libstdc++: Implement std::formatter<std::thread::id> without <sstream> ↵Jonathan Wakely
[PR115099] The std::thread::id formatter uses std::basic_ostringstream without including <sstream>, which went unnoticed because the test for it uses a stringstream to check the output is correct. The fix implemented here is to stop using basic_ostringstream for formatting thread::id and just use std::format instead. As a drive-by fix, the formatter specialization is constrained to require that the thread::id::native_handle_type can be formatted, to avoid making the formatter ill-formed if the pthread_t type is not a pointer or integer. Since non-void pointers can't be formatted, ensure that we convert pointers to const void* for formatting. Make a similar change to the existing operator<< overload so that in the unlikely case that pthread_t is a typedef for char* we don't treat it as a null-terminated string when inserting into a stream. libstdc++-v3/ChangeLog: PR libstdc++/115099 * include/bits/std_thread.h: Declare formatter as friend of thread::id. * include/std/thread (operator<<): Convert non-void pointers to void pointers for output. (formatter): Add constraint that thread::native_handle_type is a pointer or integer. (formatter::format): Reimplement without basic_ostringstream. * testsuite/30_threads/thread/id/output.cc: Check output compiles before <sstream> has been included.
2024-01-03Update copyright years.Jakub Jelinek
2023-11-16libstdc++: Fix aligned formatting of stacktrace_entry and thread::id [PR112564]Jonathan Wakely
The formatter for std::thread::id should default to right-align, and the formatter for std::stacktrace_entry should not just ignore the fill-and-align and width from the format-spec! libstdc++-v3/ChangeLog: PR libstdc++/112564 * include/std/stacktrace (formatter::format): Format according to format-spec. * include/std/thread (formatter::format): Use _Align_right as default. * testsuite/19_diagnostics/stacktrace/output.cc: Check fill-and-align handling. Change compile test to run. * testsuite/30_threads/thread/id/output.cc: Check fill-and-align handling.
2023-11-16libstdc++: Use 202100L as feature test check for C++23Jonathan Wakely
I noticed that our C++23 features were not being defined when using Clang 16 with -std=c++2b, because it only defines __cplusplus=202101L but <bits/version.h> uses 202302L since my r14-3252-g0c316669b092fb change. This changes <bits/version.h> to use 202100 instead of the final 202302 value so that we support Clang 16's -std=c++2b mode. libstdc++-v3/ChangeLog: * include/bits/version.def (stds): Use >= 202100 for C++23 condition. * include/bits/version.h: Regenerate. * include/std/thread: Use > C++20 instead of >= C++23 for __cplusplus condition.
2023-09-11libstdc++: Formatting std::thread::id and std::stacktrace (P2693R1)Jonathan Wakely
New std::formatter specializations for C++23. libstdc++-v3/ChangeLog: * include/bits/version.def (__cpp_lib_formatters): Define. * include/bits/version.h: Regenerate. * include/std/stacktrace (formatter<stacktrace_entry>) (formatter<basic_stacktrace<Alloc>>): Define. * include/std/thread (formatter<thread::id, charT>): Define. * testsuite/19_diagnostics/stacktrace/output.cc: New test. * testsuite/19_diagnostics/stacktrace/synopsis.cc: Add std::formatter specializations. * testsuite/19_diagnostics/stacktrace/version.cc: Check __cpp_lib_formatters macro. * testsuite/30_threads/thread/id/hash.cc: Remove gthreads dependency. * testsuite/30_threads/thread/id/operators.cc: Likewise. * testsuite/30_threads/thread/id/operators_c++20.cc: Likewise. * testsuite/30_threads/thread/id/output.cc: New test.
2023-08-24libstdc++: Tweak some preprocessor conditions for feature testsJonathan Wakely
Update a preprocessor condition using __cplusplus and _GLIBCXX_HOSTED to use the relevant feature test macro for <syncstream>. Also add comments to some conditions saying which C++ standard revision the check corresponds to. libstdc++-v3/ChangeLog: * include/std/atomic: Add comment to #ifdef and fix indentation. * include/std/ostream: Check __glibcxx_syncbuf instead of __cplusplus and _GLIBCXX_HOSTED. * include/std/thread: Add comment to #ifdef.
2023-08-16libstdc++: Replace all manual FTM definitions and useArsen Arsenović
libstdc++-v3/ChangeLog: * libsupc++/typeinfo: Switch to bits/version.h for __cpp_lib_constexpr_typeinfo. * libsupc++/new: Switch to bits/version.h for __cpp_lib_{launder,hardware_interference_size,destroying_delete}. (launder): Guard behind __cpp_lib_launder. (hardware_destructive_interference_size) (hardware_constructive_interference_size): Guard behind __cpp_lib_hardware_interference_size. * libsupc++/exception: Switch to bits/version.h for __cpp_lib_uncaught_exceptions. (uncaught_exceptions): Guard behind __cpp_lib_uncaught_exceptions. * libsupc++/compare: Switch to bits/version.h for __cpp_lib_three_way_comparison. (three_way_comparable, three_way_comparable_with) (compare_three_way, weak_order, strong_order, partial_order): Guard behind __cpp_lib_three_way_comparison >= 201907L. * include/std/chrono: Drop __cpp_lib_chrono definition. * include/std/vector: Switch to bits/version.h for __cpp_lib_erase_if. (erase, erase_if): Guard behind __cpp_lib_erase_if. * include/std/variant: Switch to bits/version.h for __cpp_lib_variant. Guard whole header behind that FTM. * include/std/utility: Switch to bits/version.h for __cpp_lib_{exchange_function,constexpr_algorithms,as_const}, __cpp_lib_{integer_comparison_functions,to_underlying}, and __cpp_lib_unreachable. (exchange): Guard behind __cpp_lib_exchange_function. (cmp_equal, cmp_not_equal, cmp_less, cmp_greater, cmp_less_equal) (cmp_greater_equal, in_range): Guard behind __cpp_lib_integer_comparison_functions. (to_underlying): Guard behind __cpp_lib_to_underlying. (unreachable): Guard behind __cpp_lib_unreachable. * include/std/type_traits: Switch to bits/version.h for __cpp_lib_is_{null_pointer,final,nothrow_convertible,aggregate}, __cpp_lib_is_{constant_evaluated,invocable,layout_compatible}, __cpp_lib_is_{pointer_interconvertible,scoped_enum,swappable}, __cpp_lib_{logical_traits,reference_from_temporary,remove_cvref}, __cpp_lib_{result_of_sfinae,transformation_trait_aliases}, __cpp_lib_{type_identity,type_trait_variable_templates}, __cpp_lib_{unwrap_ref,void_t,integral_constant_callable}, __cpp_lib_{bool_constant,bounded_array_traits}, and __cpp_lib_has_unique_object_representations. (integral_constant::operator()): Guard behind __cpp_lib_integral_constant_callable. (bool_constant): Guard behind __cpp_lib_bool_constant. (conjunction, disjunction, negation, conjunction_v, disjunction_v) (negation_v): Guard behind __cpp_lib_logical_traits. (is_null_pointer): Guard behind __cpp_lib_is_null_pointer. (is_final): Guard behind __cpp_lib_is_final. (is_nothrow_convertible, is_nothrow_convertible_v): Guard behind __cpp_lib_is_nothrow_convertible. (remove_const_t, remove_volatile_t, remove_cv_t) (add_const_t, add_volatile_t, add_cv_t): Guard behind __cpp_lib_transformation_trait_aliases. (void_t): Guard behind __cpp_lib_void_t. (is_swappable_with_v, is_nothrow_swappable_with_v) (is_swappable_with, is_nothrow_swappable_with): Guard behind __cpp_lib_is_swappable. (is_nothrow_invocable_r, is_invocable_r, invoke_result) (is_invocable, invoke_result_t): Guard behind __cpp_lib_is_invocable. (alignment_of_v, extent_v, has_virtual_destructor_v) (is_abstract_v, is_arithmetic_v, is_array_v) (is_assignable_v, is_base_of_v, is_class_v, is_compound_v) (is_constructible_v, is_const_v, is_convertible_v) (is_copy_assignable_v, is_copy_constructible_v) (is_default_constructible_v, is_destructible_v) (is_empty_v, is_enum_v, is_final_v, is_floating_point_v) (is_function_v, is_fundamental_v, is_integral_v) (is_invocable_r_v, is_invocable_v, is_literal_type_v) (is_lvalue_reference_v, is_member_function_pointer_v) (is_member_object_pointer_v, is_member_pointer_v) (is_move_assignable_v, is_move_constructible_v) (is_nothrow_assignable_v, is_nothrow_constructible_v) (is_nothrow_copy_assignable_v, is_nothrow_copy_constructible_v) (is_nothrow_default_constructible_v, is_nothrow_destructible_v) (is_nothrow_invocable_r_v, is_nothrow_invocable_v) (is_nothrow_move_assignable_v, is_nothrow_move_constructible_v) (is_null_pointer_v, is_object_v, is_pod_v, is_pointer_v) (is_polymorphic_v, is_reference_v, is_rvalue_reference_v) (is_same_v, is_scalar_v, is_signed_v, is_standard_layout_v) (is_trivially_assignable_v, is_trivially_constructible_v) (is_trivially_copyable_v, is_trivially_copy_assignable_v) (is_trivially_copy_constructible_v) (is_trivially_default_constructible_v) (is_trivially_destructible_v, is_trivially_move_assignable_v) (is_trivially_move_constructible_v, is_trivial_v, is_union_v) (is_unsigned_v, is_void_v, is_volatile_v, rank_v, as variadic): Guard behind __cpp_lib_type_trait_variable_templates. (has_unique_object_representations) (has_unique_object_representations_v): Guard behind __cpp_lib_has_unique_object_representation. (is_aggregate): Guard behind __cpp_lib_is_aggregate. (remove_cvref, remove_cvref_t): Guard behind __cpp_lib_remove_cvref. (type_identity, type_identity_t): Guard behind __cpp_lib_type_identity. (unwrap_reference, unwrap_reference_t, unwrap_ref_decay) (unwrap_ref_decay_t): Guard behind __cpp_lib_unwrap_ref. (is_bounded_array_v, is_unbounded_array_v, is_bounded_array) (is_unbounded_array): Guard behind __cpp_lib_bounded_array_traits. (is_scoped_enum, is_scoped_enum_v): Guard behind __cpp_lib_is_scoped_enum. (reference_constructs_from_temporary) (reference_constructs_from_temporary_v): Guard behind __cpp_lib_reference_from_temporary. * include/std/tuple: Switch to bits/version.h for __cpp_lib_{constexpr_tuple,tuple_by_type,apply_make_from_tuple}. (get<T>): Guard behind __cpp_lib_tuple_by_type. (apply): Guard behind __cpp_lib_apply. (make_from_tuple): Guard behind __cpp_lib_make_from_tuple. * include/std/syncstream: Switch to bits/version.h for __cpp_lib_syncbuf. Guard header behind that FTM. * include/std/string_view: Switch to bits/version.h for __cpp_lib_{string_{view,contains},constexpr_string_view} and __cpp_lib_starts_ends_with. (basic_string_view::starts_with, basic_string_view::ends_with): Guard behind __cpp_lib_starts_ends_with. [C++23 && _GLIBCXX_HOSTED && !defined(__cpp_lib_string_contains)]: Assert as impossible ithout a bug in C++23. * include/std/string: Switch to bits/version.h for __cpp_lib_erase_if. (erase, erase_if): Guard behind __cpp_lib_erase_if. * include/std/thread: Switch to bits/version.h for __cpp_lib_jthread. * include/std/stop_token: Switch to bits/version.h for __cpp_lib_jthread. * include/std/spanstream: Switch to bits/version.h for __cpp_lib_spanstream. Guard header behind that FTM. * include/std/span: Switch to bits/version.h for __cpp_lib_span. Guard header behind that FTM. * include/std/source_location: Switch to bits/version.h for __cpp_lib_source_location. Guard header with that FTM. * include/std/shared_mutex: Switch to bits/version.h for __cpp_lib_shared{,_timed}_mutex. (shared_mutex): Guard behind __cpp_lib_shared_mutex. * include/std/semaphore: Switch to bits/version.h for __cpp_lib_semaphore. Guard header behind that FTM. * include/std/ranges: Switch to bits/version.h for __cpp_lib_ranges_{zip,chunk{,_by},slide,join_with}, __cpp_lib_ranges_{repeat_stride,cartesian_product,as_rvalue}, and __cpp_lib_ranges_{as_const,enumerate,iota}. (ranges::zip et al, ranges::chunk et al, ranges::slide et al) (ranges::chunk_by et al, ranges::join_with et al) (ranges::stride et al, ranges::cartesian_product et al) (ranges::as_rvalue et al, ranges::as_const et al) (ranges::enumerate et al): Guard behind appropriate FTM. * include/std/optional: Switch to bits/version.h for __cpp_lib_optional. Guard header behind that FTM. * include/std/numeric: Switch to bits/version.h for __cpp_lib_{gcd{,_lcm},lcm,constexpr_numeric,interpolate} and __cpp_lib_parallel_algorithm. (gcd, lcm): Guard behind __cpp_lib_gcd_lcm. (midpoint): Guard behind __cpp_lib_interpolate. * include/std/numbers: Switch to bits/version.h for __cpp_lib_math_constants. Guard header behind that FTM. * include/std/mutex: Switch to bits/version.h for __cpp_lib_scoped_lock. (scoped_Lock): Guard behind __cpp_lib_scoped_lock. * include/std/memory_resource: Switch to bits/version.h for __cpp_lib_{polymorphic_allocator,memory_resource}. (synchronized_pool_resource): Guard behind __cpp_lib_memory_resource >= 201603L. (polymorphic_allocator): Guard behind __cpp_lib_polymorphic_allocator. * include/std/memory: Switch to bits/version.h for __cpp_lib_{parallel_algorithm,atomic_value_initialization}. * include/std/list: Switch to bits/version.h for __cpp_lib_erase_if. (erase, erase_if): Guard behind __cpp_lib_erase_if. * include/std/latch: Switch to bits/version.h for __cpp_lib_latch. Guard header behind that FTM. * include/std/iterator: Switch to bits/version.h for __cpp_lib_null_iterators. * include/std/iomanip: Switch to bits/version.h for __cpp_lib_quoted_string_io. (quoted): Guard behind __cpp_lib_quoted_string_io. * include/std/functional: Switch to bits/version.h for __cpp_lib_{invoke{,_r},constexpr_functional,bind_front} and __cpp_lib_{not_fn,booyer_moore_searcher}. (invoke): Guard behind __cpp_lib_invoke. (invoke_r): Guard behind __cpp_lib_invoke_r. (bind_front): Guard behind __cpp_lib_bind_front. (not_fn): Guard behind __cpp_lib_not_fn. (boyer_moore_searcher, boyer_moore_horspool_searcher): Guard definition behind __cpp_lib_boyer_moore_searcher. * include/std/forward_list: Switch to bits/version.h for __cpp_lib_erase_if. (erase, erase_if): Guard behind __cpp_lib_erase_if. * include/std/format: Switch to bits/version.h for __cpp_lib_format. Guard header behind that FTM. * include/std/filesystem: Switch to bits/version.h for __cpp_lib_filesystem. Guard header behind that FTM. * include/std/expected: Switch to bits/version.h for __cpp_lib_expected. Guard header behind it. * include/std/execution: Switch to bits/version.h for __cpp_lib_{execution,parallel_algorithm}. Guard header behind either. * include/std/deque: Switch to bits/version.h for __cpp_lib_erase_if. (erase, erase_if): Guard behind __cpp_lib_erase_if. * include/std/coroutine: Switch to bits/version.h for __cpp_lib_coroutine. Guard header behind that FTM. * include/std/concepts: Switch to bits/version.h for __cpp_lib_concepts. Guard header behind that FTM. * include/std/complex: Switch to bits/version.h for __cpp_lib_{complex_udls,constexpr_complex}. (operator""if, operator""i, operator""il): Guard behind __cpp_lib_complex_udls. * include/std/charconv: Swtich to bits/version.h for __cpp_lib_{to_chars,constexpr_charconv}. * include/std/bitset: Switch to bits/version.h for __cpp_lib_constexpr_bitset. * include/std/bit: Switch to bits/version.h for __cpp_lib_{bit_cast,byteswap,bitops,int_pow2,endian}. (bit_cast): Guard behind __cpp_lib_bit_cast. (byteswap): Guard behind __cpp_lib_byteswap. (rotl, rotr, countl_zero, countl_one, countr_zero, countr_one) (popcount): Guard behind __cpp_lib_bitops. (has_single_bit, bit_ceil, bit_floor, bit_width): Guard behind __cpp_lib_int_pow2. (endian): Guard behind __cpp_lib_endian. * include/std/barrier: Switch to bits/version.h for __cpp_lib_barrier. Guard header behind that FTM. * include/std/atomic: Switch to bits/version.h for __cpp_lib_atomic_{is_always_lock_free,float,ref} and __cpp_lib_lock_free_type_aliases. (*::is_always_lock_free): Guard behind __cpp_lib_atomic_is_always_lock_free. (atomic<float>): Guard behind __cpp_lib_atomic_float. (atomic_ref): Guard behind __cpp_lib_atomic_ref. (atomic_signed_lock_free, atomic_unsigned_lock_free): Guard behind __cpp_lib_atomic_lock_free_type_aliases. * include/std/array: Switch to bits/version.h for __cpp_lib_to_array. (to_array): Guard behind __cpp_lib_to_array. * include/std/any: Switch to bits/version.h for __cpp_lib_any. Guard header behind that FTM. * include/std/algorithm: Switch to bits/version.h for __cpp_lib_parallel_algorithm. * include/c_global/cstddef: Switch to bits/version.h for __cpp_lib_byte. (byte): Guard behind __cpp_lib_byte. * include/c_global/cmath: Switch to bits/version.h for __cpp_lib_{hypot,interpolate}. (hypot3): Guard behind __cpp_lib_hypot. (lerp): Guard behind __cpp_lib_interpolate. * include/c_compatibility/stdatomic.h: Switch to bits/stl_version.h for __cpp_lib_atomic. Guard header behind that FTM. * include/bits/utility.h: Switch to bits/version.h for __cpp_lib_{tuple_element_t,integer_sequence,ranges_zip}. (tuple_element_t): Guard behind __cpp_lib_tuple_element_t. (integer_sequence et al): Guard behind __cpp_lib_integer_sequence. * include/bits/uses_allocator_args.h: Switch to bits/version.h for __cpp_lib_make_obj_using_allocator. Guard header behind that FTM. * include/bits/unordered_map.h: Switch to bits/version.h for __cpp_lib_unordered_map_try_emplace. (try_emplace): Guard behind __cpp_lib_unordered_map_try_emplace. * include/bits/unique_ptr.h: Switch to bits/version.h for __cpp_lib_{constexpr_memory,make_unique}. (make_unique): Guard behind __cpp_lib_make_unique. * include/bits/stl_vector.h: Switch to bits/version.h for __cpp_lib_constexpr_vector. * include/bits/stl_uninitialized.h: Switch to bits/version.h for __cpp_lib_raw_memory_algorithms. (uninitialized_default_construct) (uninitialized_default_construct_n, uninitialized_move) (uninitialized_move_n, uninitialized_value_construct) (uninitialized_value_construct_n): Guard behind __cpp_lib_raw_memory_algorithms. * include/bits/stl_tree.h: Switch to bits/version.h for __cpp_lib_generic_associative_lookup. * include/bits/stl_stack.h: Switch to bits/version.h for __cpp_lib_adaptor_iterator_pair_constructor. (stack): Guard iterator-pair constructor behind __cpp_lib_adaptor_iterator_pair_constructor. * include/bits/stl_queue.h: Switch to bits/version.h for __cpp_lib_adaptor_iterator_pair_constructor. (queue): Guard iterator-pair constructor behind __cpp_lib_adaptor_iterator_pair_constructor. * include/bits/stl_pair.h: Switch to bits/version.h for __cpp_lib_{concepts,tuples_by_type}. (get): Guard type-getting overloads behind __cpp_lib_tuples_by_type. * include/bits/stl_map.h: Switch to bits/version.h for __cpp_lib_map_try_emplace. (map<>::try_emplace): Guard behind __cpp_lib_map_try_emplace. * include/bits/stl_list.h: Switch to bits/version.h for __cpp_lib_list_remove_return_type. (__remove_return_type, _GLIBCXX_LIST_REMOVE_RETURN_TYPE_TAG) [C++20]: guard behind __cpp_lib_list_remove_return_type instead. * include/bits/stl_iterator.h: Switch to bits/version.h for __cpp_lib_{constexpr_iterator,array_constexpr} and __cpp_lib_{make_reverse_iterator,move_iterator_concept}. (make_reverse_iterator): Guard behind __cpp_lib_make_reverse_iterator. (iterator_concept et al): Guard __cpp_lib_move_iterator_concept changes behind that FTM. * include/bits/stl_function.h: Switch to bits/version.h for __cpp_lib_transparent_operators. (equal_to, not_equal_to, greater, less, greater_equal) (less_equal, bit_and, bit_or, bit_xor, bit_not, logical_and) (logical_or, logical_not, plus, minus, multiplies, divides) (modulus, negate): Guard '= void' fwdecls behind __cpp_lib_transparent_operators. (plus<void>, minus<void>, multiplies<void>, divides<void>) (modulus<void>, negate<void>, logical_and<void>, logical_or<void>) (logical_not<void>, bit_and<void>, bit_or<void>, bit_xor<void>) (equal_to<void>, not_equal_to<void>, greater<void>, less<void>) (greater_equal<void>, less_equal<void>, bit_not<void>) (__has_is_transparent): Guard behind __cpp_lib_transparent_operators. * include/bits/stl_algobase.h: Switch to bits/version.h for __cpp_lib_robust_nonmodifying_seq_ops. (robust equal, mismatch): Guard behind __cpp_lib_nonmember_container_access. * include/bits/stl_algo.h: Swtich to bits/version.h for __cpp_lib_{clamp,sample}. (clamp): Guard behind __cpp_lib_clamp. (sample): Guard behind __cpp_lib_sample. * include/bits/specfun.h: Switch to bits/version.h for __cpp_lib_math_special_functions and __STDCPP_MATH_SPEC_FUNCS__. * include/bits/shared_ptr_base.h: Switch to bits/version.h for __cpp_lib_{smart_ptr_for_overwrite,shared_ptr_arrays}. (_Sp_overwrite_tag): Guard behind __cpp_lib_smart_ptr_for_overwrite. * include/bits/shared_ptr_atomic.h: Switch to bits/version.h for __cpp_lib_atomic_shared_ptr. * include/bits/shared_ptr.h: Switch to bits/version.h for __cpp_lib_{enable_shared_from_this,shared_ptr_weak_type}. (shared_ptr<T>::weak_type): Guard behind __cpp_lib_shared_ptr_weak_type. (enable_shared_from_this<T>::weak_from_this): Guard behind __cpp_lib_enable_shared_from_this. * include/bits/ranges_cmp.h: Switch to bits/version.h for __cpp_lib_ranges. * include/bits/ranges_algo.h: Switch to bits/version.h for __cpp_lib_{shift,ranges_{contains,find_last,fold,iota}}. * include/bits/range_access.h: Switch to bits/version.h for __cpp_lib_nonmember_container_access (size, empty, data): Guard behind __cpp_lib_nonmember_container_access. (ssize): Guard behind __cpp_lib_ssize. * include/bits/ptr_traits.h: Switch to bits/version.h. for __cpp_lib_{constexpr_memory,to_address}. (to_address): Guard behind __cpp_lib_to_address. * include/bits/node_handle.h: Switch to bits/version.h for __cpp_lib_node_extract. Guard header behind that FTM. * include/bits/move_only_function.h: Switch to bits/version.h for __cpp_lib_move_only_function. Guard header behind that FTM. * include/bits/move.h: Switch to bits/version.h for __cpp_lib_addressof_constexpr. * include/bits/ios_base.h: Switch to bits/version.h for __cpp_lib_ios_noreplace. (noreplace): Guard with __cpp_lib_ios_noreplace. * include/bits/hashtable.h: Switch to bits/version.h for __cpp_lib_generic_unordered_lookup. (_M_equal_range_tr, _M_count_tr, _M_find_tr): Guard behind __cpp_lib_generic_unordered_lookup. * include/bits/forward_list.h: Switch to bits/version.h for __cpp_lib_list_remove_return_type. (__remove_return_type): Guard behind __cpp_lib_list_remove_return_type. * include/bits/erase_if.h: Switch to bits/version.h for __cpp_lib_erase_if. * include/bits/cow_string.h: Switch to bits/version.h for __cpp_lib_constexpr_string. * include/bits/chrono.h: Swtich to bits/version.h for __cpp_lib_chrono{,_udls}. (ceil): Guard behind __cpp_lib_chrono. (operator""ns et al): Guard behind __cpp_lib_chrono_udls. * include/bits/char_traits.h: Switch to bits/version.h for __cpp_lib_constexpr_char_traits. * include/bits/basic_string.h: Switch to bits/version.h for __cpp_lib_{constexpr_string,string_{resize_and_overwrite,udls}}. (resize_and_overwrite): Guard behind __cpp_lib_string_resize_and_overwrite. (operator""s): Guard behind __cpp_lib_string_udls. * include/bits/atomic_wait.h: Switch to bits/version.h for __cpp_lib_atomic_wait. Guard header behind that FTM. * include/bits/atomic_base.h: Switch to bits/version.h for __cpp_lib_atomic_value_initialization and __cpp_lib_atomic_flag_test. (atomic_flag::test): Guard behind __cpp_lib_atomic_flag_test, rather than C++20. * include/bits/allocator.h: Switch to bits/version.h for __cpp_lib_incomplete_container_elements. * include/bits/alloc_traits.h: Switch to using bits/version.h for __cpp_lib_constexpr_dynamic_alloc and __cpp_lib_allocator_traits_is_always_equal. * include/bits/align.h: Switch to bits/version.h for defining __cpp_lib_assume_aligned. (assume_aligned): Guard with __cpp_lib_assume_aligned. * include/bits/algorithmfwd.h: Switch to bits/version.h for defining __cpp_lib_constexpr_algorithms. * include/std/stacktrace: Switch to bits/version.h for __cpp_lib_stacktrace. Guard header behind that FTM. * testsuite/23_containers/array/tuple_interface/get_neg.cc: Update line numbers.
2023-01-16Update copyright years.Jakub Jelinek
2022-10-03libstdc++: Mark headers that must be hosted as such [PR103626]Arsen Arsenović
PR libstdc++/103626 - _GLIBCXX_HOSTED should respect -ffreestanding Co-authored-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: PR libstdc++/103626 * include/Makefile.am: Add new header. * include/Makefile.in: Regenerate. * include/bits/requires_hosted.h: New header. * include/experimental/algorithm: Include <bits/requires_hosted.h>. * include/experimental/any: Likewise. * include/experimental/array: Likewise. * include/experimental/buffer: Likewise. * include/experimental/chrono: Likewise. * include/experimental/deque: Likewise. * include/experimental/executor: Likewise. * include/experimental/filesystem: Likewise. * include/experimental/forward_list: Likewise. * include/experimental/functional: Likewise. * include/experimental/internet: Likewise. * include/experimental/io_context: Likewise. * include/experimental/iterator: Likewise. * include/experimental/list: Likewise. * include/experimental/map: Likewise. * include/experimental/memory: Likewise. * include/experimental/memory_resource: Likewise. * include/experimental/net: Likewise. * include/experimental/netfwd: Likewise. * include/experimental/numeric: Likewise. * include/experimental/optional: Likewise. * include/experimental/propagate_const: Likewise. * include/experimental/random: Likewise. * include/experimental/ratio: Likewise. * include/experimental/regex: Likewise. * include/experimental/scope: Likewise. * include/experimental/set: Likewise. * include/experimental/simd: Likewise. * include/experimental/socket: Likewise. * include/experimental/source_location: Likewise. * include/experimental/string: Likewise. * include/experimental/string_view: Likewise. * include/experimental/system_error: Likewise. * include/experimental/timer: Likewise. * include/experimental/tuple: Likewise. * include/experimental/unordered_map: Likewise. * include/experimental/unordered_set: Likewise. * include/experimental/utility: Likewise. * include/experimental/vector: Likewise. * include/std/barrier: Likewise. * include/std/chrono: Likewise. * include/std/condition_variable: Likewise. * include/std/deque: Likewise. * include/std/execution: Likewise. * include/std/filesystem: Likewise. * include/std/forward_list: Likewise. * include/std/fstream: Likewise. * include/std/future: Likewise. * include/std/iomanip: Likewise. * include/std/ios: Likewise. * include/std/iosfwd: Likewise. * include/std/iostream: Likewise. * include/std/istream: Likewise. * include/std/latch: Likewise. * include/std/list: Likewise. * include/std/locale: Likewise. * include/std/map: Likewise. * include/std/memory_resource: Likewise. * include/std/mutex: Likewise. * include/std/ostream: Likewise. * include/std/queue: Likewise. * include/std/random: Likewise. * include/std/regex: Likewise. * include/std/semaphore: Likewise. * include/std/set: Likewise. * include/std/shared_mutex: Likewise. * include/std/spanstream: Likewise. * include/std/sstream: Likewise. * include/std/stack: Likewise. * include/std/stacktrace: Likewise. * include/std/stop_token: Likewise. * include/std/streambuf: Likewise. * include/std/string: Likewise. * include/std/syncstream: Likewise. * include/std/system_error: Likewise. * include/std/thread: Likewise. * include/std/unordered_map: Likewise. * include/std/unordered_set: Likewise. * include/std/valarray: Likewise. * include/std/vector: Likewise. * include/tr1/array: Likewise. * include/tr1/ccomplex: Likewise. * include/tr1/cctype: Likewise. * include/tr1/cfenv: Likewise. * include/tr1/cfloat: Likewise. * include/tr1/cinttypes: Likewise. * include/tr1/climits: Likewise. * include/tr1/cmath: Likewise. * include/tr1/complex: Likewise. * include/tr1/complex.h: Likewise. * include/tr1/cstdarg: Likewise. * include/tr1/cstdbool: Likewise. * include/tr1/cstdint: Likewise. * include/tr1/cstdio: Likewise. * include/tr1/cstdlib: Likewise. * include/tr1/ctgmath: Likewise. * include/tr1/ctime: Likewise. * include/tr1/ctype.h: Likewise. * include/tr1/cwchar: Likewise. * include/tr1/cwctype: Likewise. * include/tr1/fenv.h: Likewise. * include/tr1/float.h: Likewise. * include/tr1/functional: Likewise. * include/tr1/inttypes.h: Likewise. * include/tr1/limits.h: Likewise. * include/tr1/math.h: Likewise. * include/tr1/memory: Likewise. * include/tr1/random: Likewise. * include/tr1/regex: Likewise. * include/tr1/stdarg.h: Likewise. * include/tr1/stdbool.h: Likewise. * include/tr1/stdint.h: Likewise. * include/tr1/stdio.h: Likewise. * include/tr1/stdlib.h: Likewise. * include/tr1/tgmath.h: Likewise. * include/tr1/tuple: Likewise. * include/tr1/type_traits: Likewise. * include/tr1/unordered_map: Likewise. * include/tr1/unordered_set: Likewise. * include/tr1/utility: Likewise. * include/tr1/wchar.h: Likewise. * include/tr1/wctype.h: Likewise. * include/c_global/cmath: Likewise. * include/ext/algorithm: Include <bits/requires_hosted.h>. * include/ext/bitmap_allocator.h: Likewise. * include/ext/cmath: Likewise. * include/ext/codecvt_specializations.h: Likewise. * include/ext/debug_allocator.h: Likewise. * include/ext/enc_filebuf.h: Likewise. * include/ext/extptr_allocator.h: Likewise. * include/ext/functional: Likewise. * include/ext/malloc_allocator.h: Likewise. * include/ext/memory: Likewise. * include/ext/mt_allocator.h: Likewise. * include/ext/new_allocator.h: Likewise. * include/ext/numeric: Likewise. * include/ext/pod_char_traits.h: Likewise. * include/ext/pool_allocator.h: Likewise. * include/ext/random: Likewise. * include/ext/random.tcc: Likewise. * include/ext/rb_tree: Likewise. * include/ext/rc_string_base.h: Likewise. * include/ext/rope: Likewise. * include/ext/ropeimpl.h: Likewise. * include/ext/slist: Likewise. * include/ext/sso_string_base.h: Likewise. * include/ext/stdio_filebuf.h: Likewise. * include/ext/stdio_sync_filebuf.h: Likewise. * include/ext/string_conversions.h: Likewise. * include/ext/throw_allocator.h: Likewise. * include/ext/vstring.h: Likewise. * include/ext/vstring.tcc: Likewise. * include/ext/vstring_fwd.h: Likewise. * include/ext/vstring_util.h: Likewise. * include/std/charconv: Likewise. (__cpp_lib_to_chars): Do not define for freestanding. * include/std/version: Adjust which macros get defined in freestanding. * include/ext/pointer.h [!_GLIBCXX_HOSTED]: Omit iostream functionality from freestanding. * include/std/algorithm [!_GLIBCXX_HOSTED]: Omit PSTL algos. * include/std/memory [!_GLIBCXX_HOSTED]: Omit <bits/stl_tempbuf.h> in freestanding * include/bits/algorithmfwd.h [!_GLIBCXX_HOSTED]: Omit leftover random_shuffle and stable_partition definition. * include/bits/stl_algo.h [!_GLIBCXX_HOSTED]: Omit random_shuffle and stable_partition from freestanding. * include/bits/ranges_algo.h [!_GLIBCXX_HOSTED]: Omit stable_partition from freestanding. * include/bits/concept_check.h: Remove needless HOSTED check. * include/std/iterator: Include <bits/ranges_base.h>. * include/std/numeric (__cpp_lib_parallel_algorithms): Do not define for freestanding. * include/std/functional (__cpp_lib_boyer_moore_searcher): Likewise. * testsuite/lib/prune.exp: Match error for hosted-only libstdc++ tests.
2022-05-13libstdc++: Improve doxygen docs for <thread> and <future>Jonathan Wakely
libstdc++-v3/ChangeLog: * include/bits/std_thread.h (thread, thread::id): Improve doxygen docs. * include/std/future: Likewise. * include/std/thread (jthread): Likewise.
2022-01-03Update copyright years.Jakub Jelinek
2021-10-01libstdc++: Make std::jthread support pointers to member functions [PR 100612]Jonathan Wakely
This adds a non-standard extension to support initializing a std::jthread with a pointer to a member function that expects a stop_token to be added to the arguments. That use case is not supported by C++20, because the stop_token would get added as the first argument, which is where the object argument needs to be to invoke a pointer to member function. Signed-off-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: PR libstdc++/100612 * include/std/thread (__pmf_expects_stop_token): New variable template to detect a pointer to member function that needs a stop_token to be added to the arguments. (jthread::__S_create): Use __pmf_expects_stop_token. (jthread::__S_create_pmf): New function. * testsuite/30_threads/jthread/100612.cc: New test.
2021-05-17libstdc++: Fix std::jthread assertion and re-enable skipped testJonathan Wakely
libstdc++-v3/ChangeLog: * include/std/thread (jthread::_S_create): Fix static assert message. * testsuite/30_threads/jthread/95989.cc: Re-enable test. * testsuite/30_threads/jthread/jthread.cc: Do not require pthread effective target. * testsuite/30_threads/jthread/2.cc: Moved to... * testsuite/30_threads/jthread/version.cc: ...here.
2021-04-20libstdc++: Refactor/cleanup of C++20 atomic wait implementationThomas Rodgers
This is a substantial rewrite of the atomic wait/notify (and timed wait counterparts) implementation. The previous __platform_wait looped on EINTR however this behavior is not required by the standard. A new _GLIBCXX_HAVE_PLATFORM_WAIT macro now controls whether wait/notify are implemented using a platform specific primitive or with a platform agnostic mutex/condvar. This patch only supplies a definition for linux futexes. A future update could add support __ulock_wait/wake on Darwin, for instance. The members of __waiters were lifted to a new base class. The members are now arranged such that overall sizeof(__waiter_pool_base) fits in two cache lines (on platforms with at least 64 byte cache lines). The definition will also use destructive_interference_size for this if it is available. The __waiters type is now specific to untimed waits, and is renamed to __waiter_pool. Timed waits have a corresponding __timed_waiter_pool type. Much of the code has been moved from the previous __atomic_wait() free function to the __waiter_base template and a __waiter derived type is provided to implement the un-timed wait operations. A similar change has been made to the timed wait implementation. The __atomic_spin code has been extended to take a spin policy which is invoked after the initial busy wait loop. The default policy is to return from the spin. The timed wait code adds a timed backoff spinning policy. The code from <thread> which implements this_thread::sleep_for, sleep_until has been moved to a new <bits/std_thread_sleep.h> header which allows the thread sleep code to be consumed without pulling in the whole of <thread>. The entry points into the wait/notify code have been restructured to support either - * Testing the current value of the atomic stored at the given address and waiting on a notification. * Applying a predicate to determine if the wait was satisfied. The entry points were renamed to make it clear that the wait and wake operations operate on addresses. The first variant takes the expected value and a function which returns the current value that should be used in comparison operations, these operations are named with a _v suffix (e.g. 'value'). All atomic<_Tp> wait/notify operations use the first variant. Barriers, latches and semaphores use the predicate variant. This change also centralizes what it means to compare values for the purposes of atomic<T>::wait rather than scattering through individual predicates. This change also centralizes the repetitive code which adjusts for different user supplied clocks (this should be moved elsewhere and all such adjustments should use a common implementation). This change also removes the hashing of the pointer and uses the pointer value directly for indexing into the waiters table. libstdc++-v3/ChangeLog: * include/Makefile.am: Add new <bits/this_thread_sleep.h> header. * include/Makefile.in: Regenerate. * include/bits/this_thread_sleep.h: New file. * include/bits/atomic_base.h: Adjust all calls to __atomic_wait/__atomic_notify for new call signatures. * include/bits/atomic_timed_wait.h: Extensive rewrite. * include/bits/atomic_wait.h: Likewise. * include/bits/semaphore_base.h: Adjust all calls to __atomic_wait/__atomic_notify for new call signatures. * include/std/atomic: Likewise. * include/std/barrier: Likewise. * include/std/latch: Likewise. * include/std/semaphore: Likewise. * include/std/thread (this_thread::sleep_for) (this_thread::sleep_until): Move to new header. * testsuite/29_atomics/atomic/wait_notify/bool.cc: Simplify test. * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise. * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise. * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise. * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise. * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise. * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
2021-04-06libstdc++: Fix doxygen markup for group close commandsJonathan Wakely
A change in Doxygen 1.8.16 means that "// @}" is no longer recognized by Doxygen, so doesn't close a @{ group. A "///" comment needs to be used. libstdc++-v3/ChangeLog: * include/bits/atomic_base.h: Fix doxygen group close. * include/bits/basic_ios.h: Likewise. * include/bits/forward_list.h: Likewise. * include/bits/fs_dir.h: Likewise. * include/bits/fs_ops.h: Likewise. * include/bits/fs_path.h: Likewise. * include/bits/functional_hash.h: Likewise. * include/bits/gslice.h: Likewise. * include/bits/gslice_array.h: Likewise. * include/bits/hashtable_policy.h: Likewise. * include/bits/indirect_array.h: Likewise. * include/bits/locale_classes.h: Likewise. * include/bits/locale_facets.h: Likewise. * include/bits/locale_facets_nonio.h: Likewise. * include/bits/mask_array.h: Likewise. * include/bits/refwrap.h: Likewise. * include/bits/regex.h: Likewise. * include/bits/regex_automaton.h: Likewise. * include/bits/regex_compiler.h: Likewise. * include/bits/regex_constants.h: Likewise. * include/bits/regex_error.h: Likewise. * include/bits/regex_executor.h: Likewise. * include/bits/regex_scanner.h: Likewise. * include/bits/shared_ptr.h: Likewise. * include/bits/shared_ptr_atomic.h: Likewise. * include/bits/shared_ptr_base.h: Likewise. * include/bits/slice_array.h: Likewise. * include/bits/specfun.h: Likewise. * include/bits/std_function.h: Likewise. * include/bits/std_mutex.h: Likewise. * include/bits/stl_deque.h: Likewise. * include/bits/stl_iterator.h: Likewise. * include/bits/stl_iterator_base_types.h: Likewise. * include/bits/stl_map.h: Likewise. * include/bits/stl_multimap.h: Likewise. * include/bits/stl_multiset.h: Likewise. * include/bits/stl_numeric.h: Likewise. * include/bits/stl_pair.h: Likewise. * include/bits/stl_set.h: Likewise. * include/bits/stl_uninitialized.h: Likewise. * include/bits/stream_iterator.h: Likewise. * include/bits/streambuf_iterator.h: Likewise. * include/bits/unique_ptr.h: Likewise. * include/bits/unordered_map.h: Likewise. * include/bits/unordered_set.h: Likewise. * include/decimal/decimal: Likewise. * include/experimental/any: Likewise. * include/experimental/array: Likewise. * include/experimental/bits/fs_dir.h: Likewise. * include/experimental/bits/fs_fwd.h: Likewise. * include/experimental/bits/fs_ops.h: Likewise. * include/experimental/bits/fs_path.h: Likewise. * include/experimental/buffer: Likewise. * include/experimental/internet: Likewise. * include/experimental/optional: Likewise. * include/experimental/propagate_const: Likewise. * include/experimental/socket: Likewise. * include/ext/pb_ds/assoc_container.hpp: Likewise. * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp: Likewise. * include/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp: Likewise. * include/ext/pb_ds/detail/trie_policy/node_metadata_selector.hpp: Likewise. * include/ext/pb_ds/detail/types_traits.hpp: Likewise. * include/ext/pb_ds/exception.hpp: Likewise. * include/ext/pb_ds/priority_queue.hpp: Likewise. * include/ext/pb_ds/tag_and_trait.hpp: Likewise. * include/ext/random: Likewise. * include/std/any: Likewise. * include/std/atomic: Likewise. * include/std/bitset: Likewise. * include/std/chrono: Likewise. * include/std/complex: Likewise. * include/std/condition_variable: Likewise. * include/std/fstream: Likewise. * include/std/future: Likewise. * include/std/iostream: Likewise. * include/std/istream: Likewise. * include/std/mutex: Likewise. * include/std/numeric: Likewise. * include/std/ostream: Likewise. * include/std/ratio: Likewise. * include/std/shared_mutex: Likewise. * include/std/stdexcept: Likewise. * include/std/streambuf: Likewise. * include/std/system_error: Likewise. * include/std/thread: Likewise. * include/std/valarray: Likewise. * include/std/variant: Likewise. * include/tr1/cmath: Likewise. * include/tr1/regex: Likewise. * include/tr2/dynamic_bitset: Likewise. * libsupc++/atomic_lockfree_defines.h: Likewise. * libsupc++/exception: Likewise. * libsupc++/exception.h: Likewise. * libsupc++/exception_ptr.h: Likewise. * libsupc++/nested_exception.h: Likewise. libstdc++-v3/ChangeLog: * include/tr1/regex:
2021-01-04Update copyright years.Jakub Jelinek
2020-12-17libstdc++: Move std::hash<std::thread::id> to <bits/std_thread.h>Jonathan Wakely
This makes the hash function available without including the whole of <thread>, which is needed for <barrier>. libstdc++-v3/ChangeLog: * include/bits/std_thread.h (hash<thread::id>): Move here, from ... * include/std/thread (hash<thread::id>): ... here.
2020-12-09libstdc++: Fix build failure for target with no way to sleepJonathan Wakely
In previous releases the std::this_thread::sleep_for function was only declared if the target supports multiple threads. I changed that recently in r11-2649-g5bbb1f3000c57fd4d95969b30fa0e35be6d54ffb so that sleep_for could be used single-threaded. But that means that targets using --disable-threads are now required to provide some way to sleep. This breaks the build for (at least) AVR when trying to build a hosted library. This patch adds a new autoconf macro that is defined when no way to sleep is available, and uses that to suppress the sleeping functions in std::this_thread. The #error in src/c++11/thread.cc is retained for the case where there is no sleep function available but multiple threads are supported. This is consistent with previous releases, but that #error could probably be removed without any consequences. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Define NO_SLEEP if none of nanosleep, sleep and Sleep is available. * config.h.in: Regenerate. * configure: Regenerate. * include/std/thread [_GLIBCXX_NO_SLEEP] (__sleep_for): Do not declare. [_GLIBCXX_NO_SLEEP] (sleep_for, sleep_until): Do not define. * src/c++11/thread.cc [_GLIBCXX_NO_SLEEP] (__sleep_for): Do not define.
2020-11-19libstdc++: Move std::thread to a new headerJonathan Wakely
This makes it possible to use std::thread without including the whole of <thread>. It also makes this_thread::get_id() and this_thread::yield() available even when there is no gthreads support (e.g. when GCC is built with --disable-threads or --enable-threads=single). In order for the std::thread::id return type of this_thread::get_id() to be defined, std:thread itself is defined unconditionally. However the constructor that creates new threads is not defined for single-threaded builds. The thread::join() and thread::detach() member functions are defined inline for single-threaded builds and just throw an exception (because we know the thread cannot be joinable if the constructor that creates joinable threads doesn't exit). The thread::hardware_concurrency() member function is also defined inline and returns 0 (as suggested by the standard when the value "is not computable or well-defined"). The main benefit for most targets is that other headers such as <future> do not need to include the whole of <thread> just to be able to create a std::thread. That avoids including <stop_token> and std::jthread where not required. This is another partial fix for PR 92546. This also means we can use this_thread::get_id() and this_thread::yield() in <stop_token> instead of using the gthread functions directly. This removes some preprocessor conditionals, simplifying the code. libstdc++-v3/ChangeLog: PR libstdc++/92546 * include/Makefile.am: Add new <bits/std_thread.h> header. * include/Makefile.in: Regenerate. * include/std/future: Include new header instead of <thread>. * include/std/stop_token: Include new header instead of <bits/gthr.h>. (stop_token::_S_yield()): Use this_thread::yield(). (_Stop_state_t::_M_requester): Change type to std::thread::id. (_Stop_state_t::_M_request_stop()): Use this_thread::get_id(). (_Stop_state_t::_M_remove_callback(_Stop_cb*)): Likewise. Use __is_single_threaded() to decide whether to synchronize. * include/std/thread (thread, operator==, this_thread::get_id) (this_thread::yield): Move to new header. (operator<=>, operator!=, operator<, operator<=, operator>) (operator>=, hash<thread::id>, operator<<): Define even when gthreads not available. * src/c++11/thread.cc: Include <memory>. * include/bits/std_thread.h: New file. (thread, operator==, this_thread::get_id, this_thread::yield): Define even when gthreads not available. [!_GLIBCXX_HAS_GTHREADS] (thread::join, thread::detach) (thread::hardware_concurrency): Define inline.
2020-11-11libstdc++: Assigning to a joinable std::jthread calls std::terminatePaul Scharnofske
Move assigning to a std::jthread that represents a thread of execution needs to send a stop request and join that running thread. Otherwise the std::thread data member will terminate in its assignment operator. Co-authored-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: * include/std/thread (jthread::operator=(jthread&&)): Transfer any existing state to a temporary that will request a stop and then join. * testsuite/30_threads/jthread/jthread.cc: Test move assignment.
2020-08-18libstdc++: Remove redundant copying of std::async arguments [PR 69724]Jonathan Wakely
As was previously done for std::thread, this removes an unnecessary copy of an rvalue of type thread::_Invoker. Instead of creating the rvalue and then moving that into the shared state, the member of the shared state is initialized directly from the forwarded callable and bound arguments. This also slightly simplifies std::thread creation to remove the _S_make_state helper function. libstdc++-v3/ChangeLog: PR libstdc++/69724 * include/std/future (__future_base::_S_make_deferred_state) (__future_base::_S_make_async_state): Remove. (__future_base::_Deferred_state): Change constructor to accept a parameter pack of arguments and forward them to the call wrapper. (__future_base::_Async_state_impl): Likewise. Replace lambda expression with a named member function. (async): Construct state object directly from the arguments, instead of using thread::__make_invoker, _S_make_deferred_state and _S_make_async_state. Move shared state into the returned future. * include/std/thread (thread::_Call_wrapper): New alias template for use by constructor and std::async. (thread::thread(Callable&&, Args&&...)): Create state object directly instead of using _S_make_state. (thread::__make_invoker, thread::__decayed_tuple) (thread::_S_make_state): Remove. * testsuite/30_threads/async/69724.cc: New test.
2020-08-11libstdc++: Make std::this_thread functions work without gthreadsJonathan Wakely
The only function in namespace std::this_thread that actually depends on thread support being present is this_thread::get_id(). The other functions (yield, sleep_for and sleep_until) can be defined for targets without gthreads. A small change is needed in std::this_thread::sleep_for which currently uses the __gthread_time_t typedef. Since it just calls nanosleep directly, it should use timespec directly instead of the typedef. Even std::this_thread::get_id() could be made to work, the only difficulty is that it returns a value of type std::thread::id and std::thread is only defined when gthreads support exists. libstdc++-v3/ChangeLog: * include/std/thread [!_GLIBCXX_HAS_GTHREADS] (this_thread::yield) (this_thread::sleep_until): Define. [!_GLIBCXX_HAS_GTHREADS] (this_thread::sleep_for): Define. Replace use of __gthread_time_t typedef with timespec. * src/c++11/thread.cc [!_GLIBCXX_HAS_GTHREADS] (__sleep_for): Likewise. * testsuite/30_threads/this_thread/2.cc: Moved to... * testsuite/30_threads/this_thread/yield.cc: ...here. * testsuite/30_threads/this_thread/3.cc: Moved to... * testsuite/30_threads/this_thread/sleep_for-mt.cc: ...here. * testsuite/30_threads/this_thread/4.cc: Moved to... * testsuite/30_threads/this_thread/sleep_until-mt.cc: ...here. * testsuite/30_threads/this_thread/58038.cc: Add dg-require-sleep. * testsuite/30_threads/this_thread/60421.cc: Likewise. * testsuite/30_threads/this_thread/sleep_for.cc: New test. * testsuite/30_threads/this_thread/sleep_until.cc: New test.
2020-07-06libstdc++: Fix -Wmismatched-tags warnings (PR 96063)Jonathan Wakely
libstdc++-v3/ChangeLog: * include/bits/fs_dir.h: Use consistent tag in class-head. * include/bits/localefwd.h: Likwise. * include/bits/regex.h: Likwise. * include/bits/stl_map.h: Likwise. * include/bits/stl_multimap.h: Likwise. * include/bits/stl_multiset.h: Likwise. * include/bits/stl_set.h: Likwise. * include/std/complex: Likwise. * include/std/functional: Likwise. * include/std/future: Likwise. * include/std/system_error: Likwise. * include/std/thread: Likwise. * include/std/tuple: Likwise. * include/std/type_traits: Likwise. * include/std/valarray: Likwise.
2020-03-25libstdc++: Define and use chrono::is_clock for C++20Jonathan Wakely
For C++20 the wait_until members of mutexes and condition variables are required to be ill-formed if given a clock that doesn't meet the requirements for a clock type. To implement that requirement this patch adds static assertions using the chrono::is_clock trait, and defines that trait. To avoid expensive checks for the common cases, the trait (and associated variable template) are explicitly specialized for the standard clock types. This also moves the filesystem::__file_clock type from <filesystem> to <chrono>, so that chrono::file_clock and chrono::file_time can be defined in <chrono> as required. * include/bits/fs_fwd.h (filesystem::__file_clock): Move to ... * include/std/chrono (filesystem::__file_clock): Here. (filesystem::__file_clock::from_sys, filesystem::__file_clock::to_sys): Define public member functions for C++20. (is_clock, is_clock_v): Define traits for C++20. * include/std/condition_variable (condition_variable::wait_until): Add check for valid clock. * include/std/future (_State_baseV2::wait_until): Likewise. * include/std/mutex (__timed_mutex_impl::_M_try_lock_until): Likewise. * include/std/shared_mutex (shared_timed_mutex::try_lock_shared_until): Likewise. * include/std/thread (this_thread::sleep_until): Likewise. * testsuite/30_threads/condition_variable/members/2.cc: Qualify slow_clock with new namespace. * testsuite/30_threads/condition_variable/members/clock_neg.cc: New test. * testsuite/30_threads/condition_variable_any/members/clock_neg.cc: New test. * testsuite/30_threads/future/members/clock_neg.cc: New test. * testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc: Qualify slow_clock with new namespace. * testsuite/30_threads/recursive_timed_mutex/try_lock_until/ clock_neg.cc: New test. * testsuite/30_threads/shared_future/members/clock_neg.cc: New test. * testsuite/30_threads/shared_lock/locking/clock_neg.cc: New test. * testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc: New test. * testsuite/30_threads/timed_mutex/try_lock_until/3.cc: Qualify slow_clock with new namespace. * testsuite/30_threads/timed_mutex/try_lock_until/4.cc: Likewise. * testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc: New test. * testsuite/30_threads/unique_lock/locking/clock_neg.cc: New test. * testsuite/std/time/traits/is_clock.cc: New test. * testsuite/util/slow_clock.h (slow_clock): Move to __gnu_test namespace.
2020-02-20libstdc++: Add <=> to thread::idJonathan Wakely
* include/std/thread (thread::id::operator<=>): Define for C++20. * testsuite/30_threads/thread/id/70294.cc: Do not take addresses of functions in namespace std. * testsuite/30_threads/thread/id/operators_c++20.cc: New test.
2020-01-01Update copyright years.Jakub Jelinek
From-SVN: r279813
2019-11-18libstdc++: Fix std::jthread bugsJonathan Wakely
The std::jthread::get_id() function was missing a return statement. The is_invocable check needs to be done using decayed types, as they'll be forwarded to std::invoke as rvalues. Also reduce header dependencies for the <thread> header. We don't need to include <functional> for std::jthread because <bits/invoke.h> is already included, which defines std::__invoke. We can also remove <bits/functexcept.h> which isn't used at all. Finally, when _GLIBCXX_HAS_GTHREADS is not defined there's no point including any other headers, since we're not going to define anything in <thread> anyway. * include/std/thread: Reduce header dependencies. (jthread::get_id()): Add missing return. (jthread::get_stop_token()): Avoid unnecessary stop_source temporary. (jthread::_S_create): Check is_invocable using decayed types. Add static assertion. * testsuite/30_threads/jthread/1.cc: Add dg-require-gthreads. * testsuite/30_threads/jthread/2.cc: Likewise. * testsuite/30_threads/jthread/3.cc: New test. * testsuite/30_threads/jthread/jthread.cc: Add missing directives for pthread and gthread support. Use VERIFY instead of assert. From-SVN: r278402
2019-11-16libstdc++: Optimize std::jthread constructionJonathan Wakely
This change avoids storing a copy of a stop_token object that isn't needed and won't be passed to the callable object. This slightly reduces memory usage when the callable doesn't use a stop_token. It also removes indirection in the invocation of the callable in the new thread, as there is no lambda and no additional calls to std::invoke. It also adds some missing [[nodiscard]] attributes, and the non-member swap overload for std::jthread. * include/std/thread (jthread::jthread()): Use nostopstate constant. (jthread::jthread(Callable&&, Args&&...)): Use helper function to create std::thread instead of indirection through a lambda. Use remove_cvref_t instead of decay_t. (jthread::joinable(), jthread::get_id(), jthread::native_handle()) (jthread::hardware_concurrency()): Add nodiscard attribute. (swap(jthread&. jthread&)): Define hidden friend. (jthread::_S_create): New helper function for constructor. From-SVN: r278364
2019-11-15Support for jthread and stop_tokenThomas Rodgers
* include/Makefile.am: Add <stop_token> header. * include/Makefile.in: Regenerate. * include/std/condition_variable: Add overloads for stop_token support to condition_variable_any. * include/std/stop_token: New file. * include/std/thread: Add jthread type. * include/std/version (__cpp_lib_jthread): New value. * testsuite/30_threads/condition_variable_any/stop_token/1.cc: New test. * testsuite/30_threads/condition_variable_any/stop_token/2.cc: New test. * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc: New test. * testsuite/30_threads/jthread/1.cc: New test. * testsuite/30_threads/jthread/2.cc: New test. * testsuite/30_threads/jthread/jthread.cc: New test. * testsuite/30_threads/stop_token/1.cc: New test. * testsuite/30_threads/stop_token/2.cc: New test. * testsuite/30_threads/stop_token/stop_token.cc: New test. From-SVN: r278274
2019-05-14PR libstdc++/69724 avoid temporary in std::thread constructionJonathan Wakely
The std::thread constructor creates (and then moves) an unnecessary temporary copy of each argument. Optimize it to only make the one copy that is required. PR libstdc++/69724 * include/std/thread (thread::_State_impl, thread::_S_make_state): Replace single _Callable parameter with variadic _Args pack, to forward them directly to the tuple of decayed copies. * testsuite/30_threads/thread/cons/69724.cc: New test. From-SVN: r271166
2019-05-02Improve Doxygen docs for nested namespacesJonathan Wakely
* doc/doxygen/doxygroups.cc (std::tr2, std::__gnu_cxx): Improve docs. (std::experimental): Add docs. * doc/doxygen/user.cfg.in (PREDEFINED): Expand macros for __cxx11 namespace to nothing when generating docs. * include/bits/regex_constants.h (std::regex_constants): Improve docs. * include/std/chrono (std::chrono): Likewise. * include/std/functional (std::placeholders): Likewise. * include/std/thread (std::this_thread): Likewise. From-SVN: r270805
2019-01-01Update copyright years.Jakub Jelinek
From-SVN: r267494
2018-07-26Remove <chrono> dependency on _GLIBCXX_USE_C99_STDINT_TR1Jonathan Wakely
By adding fallback definitions of std::intmax_t and std::uintmax_t it's possible to define <ratio> without _GLIBCXX_USE_C99_STDINT_TR1. This in turn allows most of <chrono> to be defined, which removes the dependency on _GLIBCXX_USE_C99_STDINT_TR1 for all of the C++11 concurrency features. The compiler defines __INTMAX_TYPE__ and __UINTMAX_TYPE__ unconditionally so it should be safe to rely on them. * include/bits/atomic_futex.h [!_GLIBCXX_USE_C99_STDINT_TR1] (__atomic_futex_unsigned_base): Remove dependency on _GLIBCXX_USE_C99_STDINT_TR1 macro. * include/bits/unique_lock.h [!_GLIBCXX_USE_C99_STDINT_TR1] (unique_lock): Remove dependency on _GLIBCXX_USE_C99_STDINT_TR1. * include/c_global/cstdint [!_GLIBCXX_USE_C99_STDINT_TR1] (intmax_t) (uintmax_t): Define using predefined macros. * include/std/chrono [!_GLIBCXX_USE_C99_STDINT_TR1] (duration) (time_point, system_clock, high_resolution_clock, steady_clock): Remove dependency on _GLIBCXX_USE_C99_STDINT_TR1 macro. (nanoseconds, microseconds, milliseconds, seconds, minutes, hours): [!_GLIBCXX_USE_C99_STDINT_TR1]: Define using __INT64_TYPE__ or long long when <stdint.h> is not usable. * include/std/condition_variable [!_GLIBCXX_USE_C99_STDINT_TR1] (condition_variable, condition_variable_any): Remove dependency on _GLIBCXX_USE_C99_STDINT_TR1. * include/std/future [!_GLIBCXX_USE_C99_STDINT_TR1] (future, promise) (packaged_task, async): Likewise. * include/std/mutex [!_GLIBCXX_USE_C99_STDINT_TR1] (recursive_mutex) (timed_mutex, recursive_timed_mutex, try_lock, lock, scoped_lock) (once_flag, call_once): Likewise. * include/std/ratio [!_GLIBCXX_USE_C99_STDINT_TR1] (ratio): Likewise. * include/std/shared_mutex [!_GLIBCXX_USE_C99_STDINT_TR1] (shared_mutex, shared_timed_mutex, shared_lock): Likewise. * include/std/thread [!_GLIBCXX_USE_C99_STDINT_TR1] (thread) (this_thread::get_id, this_thread::yield, this_thread::sleep_for) (this_thread::sleep_until): Likewise. * src/c++11/chrono.cc: Remove dependency on _GLIBCXX_USE_C99_STDINT_TR1 macro. * src/c++11/condition_variable.cc: Likewise. * src/c++11/futex.cc: Likewise. * src/c++11/future.cc: Likewise. * src/c++11/mutex.cc: Likewise. * src/c++11/thread.cc: Likewise. * testsuite/20_util/duration/literals/range_neg.cc: Adjust dg-error. * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise. * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise. * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise. * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Likewise. * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise. From-SVN: r263001
2018-06-15LWG 3039 Unnecessary decay in thread and packaged_taskJonathan Wakely
* include/std/future (__constrain_pkgdtask): Replace with ... (packaged_task::__not_same): New alias template, using __remove_cvref_t instead of decay. * include/std/thread (thread::__not_same): Add comment. From-SVN: r261618
2018-05-03PR libstdc++/84535 constrain std::thread constructorJonathan Wakely
The standard requires that the std::thread constructor is constrained so it can't be called with a first argument of type std::thread. The current implementation only meets that requirement if the constructor is called with one argument, by using deleted overloads. This uses an enable_if constraint to enforce the requirement for any number of arguments. Also add a static assertion to give a more readable error for invalid arguments that cannot be invoked. Also simplify _Invoker to reduce the error cascade for ill-formed instantiations with non-invocable arguments. PR libstdc++/84535 * include/std/thread (thread::__not_same): New SFINAE helper. (thread::thread(_Callable&&, _Args&&...)): Add SFINAE constraint that first argument is not a std::thread. Add static assertion to check INVOKE expression is valid. (thread::thread(thread&), thread::thread(const thread&&)): Remove. (thread::_Invoke::_M_invoke, thread::_Invoke::operator()): Use __invoke_result for return types and remove exception specifications. * testsuite/30_threads/thread/cons/84535.cc: New. From-SVN: r259893
2018-02-23PR libstdc++/84532 prevent unwrapping of reference_wrapper argumentsJonathan Wakely
PR libstdc++/84532 * include/std/thread (thread::__make_invoker): Construct tuple directly instead of using make_tuple. * testsuite/30_threads/async/84532.cc: New. * testsuite/30_threads/thread/84532.cc: New. From-SVN: r257956
2018-01-03Update copyright years.Jakub Jelinek
From-SVN: r256169
2017-07-23re PR libstdc++/81064 (Inline namespace regression)François Dumont
2017-07-23 François Dumont <fdumont@gcc.gnu.org> PR libstdc++/81064 * include/bits/algorithmfwd.h: Reorganize versioned namespace. * include/bits/basic_string.h: Likewise. * include/bits/c++config: Likewise. * include/bits/deque.tcc: Likewise. * include/bits/forward_list.h: Likewise. * include/bits/forward_list.tcc: Likewise. * include/bits/hashtable_policy.h: Likewise. * include/bits/list.tcc: Likewise. * include/bits/move.h: Likewise. * include/bits/quoted_string.h: Likewise. * include/bits/random.h: Likewise. * include/bits/random.tcc: Likewise. * include/bits/regex.h: Likewise. * include/bits/regex.tcc: Likewise. * include/bits/regex_automaton.h: Likewise. * include/bits/regex_automaton.tcc: Likewise. * include/bits/regex_compiler.h: Likewise. * include/bits/regex_compiler.tcc: Likewise. * include/bits/regex_constants.h: Likewise. * include/bits/regex_error.h: Likewise. * include/bits/regex_executor.h: Likewise. * include/bits/regex_executor.tcc: Likewise. * include/bits/regex_scanner.h: Likewise. * include/bits/regex_scanner.tcc: Likewise. * include/bits/specfun.h: Likewise. * include/bits/stl_algo.h: Likewise. * include/bits/stl_algobase.h: Likewise. * include/bits/stl_bvector.h: Likewise. * include/bits/stl_deque.h: Likewise. * include/bits/stl_iterator.h: Likewise. * include/bits/stl_iterator_base_funcs.h: Likewise. * include/bits/stl_list.h: Likewise. * include/bits/stl_map.h: Likewise. * include/bits/stl_multimap.h: Likewise. * include/bits/stl_multiset.h: Likewise. * include/bits/stl_relops.h: Likewise. * include/bits/stl_set.h: Likewise. * include/bits/stl_vector.h: Likewise. * include/bits/uniform_int_dist.h: Likewise. * include/bits/unordered_map.h: Likewise. * include/bits/unordered_set.h: Likewise. * include/bits/vector.tcc: Likewise. * include/c_global/cmath: Likewise. * include/c_std/cmath: Likewise. * include/decimal/decimal: Likewise. * include/decimal/decimal.h: Likewise. * include/experimental/algorithm: Likewise. * include/experimental/any: Likewise. * include/experimental/array: Likewise. * include/experimental/bits/erase_if.h: Likewise. * include/experimental/bits/fs_dir.h: Likewise. * include/experimental/bits/fs_fwd.h: Likewise. * include/experimental/bits/fs_ops.h: Likewise. * include/experimental/bits/fs_path.h: Likewise. * include/experimental/bits/lfts_config.h: Likewise. * include/experimental/bits/shared_ptr.h: Likewise. * include/experimental/bits/string_view.tcc: Likewise. * include/experimental/chrono: Likewise. * include/experimental/deque: Likewise. * include/experimental/filesystem: Likewise. * include/experimental/forward_list: Likewise. * include/experimental/functional: Likewise. * include/experimental/iterator: Likewise. * include/experimental/list: Likewise. * include/experimental/map: Likewise. * include/experimental/memory: Likewise. * include/experimental/memory_resource: Likewise. * include/experimental/numeric: Likewise. * include/experimental/optional: Likewise. * include/experimental/propagate_const: Likewise. * include/experimental/random: Likewise. * include/experimental/ratio: Likewise. * include/experimental/regex: Likewise. * include/experimental/set: Likewise. * include/experimental/source_location: Likewise. * include/experimental/string: Likewise. * include/experimental/string_view: Likewise. * include/experimental/system_error: Likewise. * include/experimental/tuple: Likewise. * include/experimental/type_traits: Likewise. * include/experimental/unordered_map: Likewise. * include/experimental/unordered_set: Likewise. * include/experimental/utility: Likewise. * include/experimental/vector: Likewise. * include/ext/bitmap_allocator.h: Likewise. * include/ext/codecvt_specializations.h: Likewise. * include/ext/rope: Likewise. * include/ext/typelist.h: Likewise. * include/std/chrono: Likewise. * include/std/complex: Likewise. * include/std/functional: Likewise. * include/std/numeric: Likewise. * include/std/string_view: Likewise. * include/std/thread: Likewise. * include/std/variant: Likewise. * include/tr1/array: Likewise. * include/tr1/bessel_function.tcc: Likewise. * include/tr1/beta_function.tcc: Likewise. * include/tr1/cmath: Likewise. * include/tr1/complex: Likewise. * include/tr1/ell_integral.tcc: Likewise. * include/tr1/exp_integral.tcc: Likewise. * include/tr1/functional: Likewise. * include/tr1/functional_hash.h: Likewise. * include/tr1/gamma.tcc: Likewise. * include/tr1/hashtable.h: Likewise. * include/tr1/hashtable_policy.h: Likewise. * include/tr1/hypergeometric.tcc: Likewise. * include/tr1/legendre_function.tcc: Likewise. * include/tr1/modified_bessel_func.tcc: Likewise. * include/tr1/poly_hermite.tcc: Likewise. * include/tr1/poly_laguerre.tcc: Likewise. * include/tr1/random.h: Likewise. * include/tr1/random.tcc: Likewise. * include/tr1/regex: Likewise. * include/tr1/riemann_zeta.tcc: Likewise. * include/tr1/shared_ptr.h: Likewise. * include/tr1/special_function_util.h: Likewise. * include/tr1/tuple: Likewise. * include/tr1/type_traits: Likewise. * include/tr1/unordered_map.h: Likewise. * include/tr1/unordered_set.h: Likewise. * include/tr1/utility: Likewise. * include/tr2/bool_set: Likewise. * include/tr2/bool_set.tcc: Likewise. * include/tr2/dynamic_bitset: Likewise. * include/tr2/dynamic_bitset.tcc: Likewise. * include/tr2/ratio: Likewise. * include/tr2/type_traits: Likewise. * src/c++11/chrono.cc: Likewise. * src/c++11/compatibility-c++0x.cc: Likewise. * src/c++11/compatibility-chrono.cc: Likewise. * src/c++11/cxx11-shim_facets.cc: Likewise. * src/c++11/hashtable_c++0x.cc: Likewise. * src/c++11/placeholders.cc: Likewise. * src/c++11/thread.cc: Likewise. * src/c++98/bitmap_allocator.cc: Likewise. * src/c++98/hashtable_tr1.cc: Likewise. * src/c++98/list.cc: Likewise. * src/shared/hashtable-aux.cc: Likewise. * testsuite/20_util/duration/literals/range.cc: Adapt line number. * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise. * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise. * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise. * testsuite/20_util/forward/c_neg.cc: Likewise. * testsuite/20_util/forward/f_neg.cc: Likewise. * testsuite/26_numerics/gcd/gcd_neg.cc: Likewise. * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise. * testsuite/26_numerics/random/pr60037-neg.cc: Likewise. * python/libstdcxx/v6/printers.py: Adapt. From-SVN: r250458
2017-01-03Add deleted std::thread(const thread&&) constructorJonathan Wakely
PR libstdc++/78956 * include/std/thread (thread(const thread&&)): Add deleted constructor. * testsuite/30_threads/thread/cons/lwg2097.cc: New test. From-SVN: r244022
2017-01-01Update copyright years.Jakub Jelinek
From-SVN: r243994
2016-10-17PR77998 Remove std::thread::_Invoker::result_typeJonathan Wakely
PR libstdc++/77998 * include/std/future (__future_base::_Deferred_state) (__future_base::_Async_state_impl): Use decltype to deduce return type, instead of _Invoker::result_type. * include/std/thread (thread::_Invoker::operator()): Likewise. (thread::_Invoker::result_type): Remove. From-SVN: r241236
2016-10-13Replace __bind_simple with std::thread::__make_invokerJonathan Wakely
* include/std/functional (_Bind_simple, _Bind_simple_helper) (__bind_simple): Remove. * include/std/future: Include <bits/invoke.h> instead of <functional>. (__future_base::_Task_state::_M_run) (__future_base::_Task_state::_M_run_delayed): Use lambda expressions instead of __bind_simple. (__future_base::_Task_state::_S_maybe_wrap_ref): Remove. (async): Use thread::__make_invoker instead of __bind_simple. * include/std/thread: Include <tuple> and <bits/invoke.h> instead of <functional>. (thread::_Invoker, thread::__make_invoker): Define helpers to do INVOKE(DECAY_COPY(f), DECAY_COPY(args)...). From-SVN: r241093
2016-06-16Remove trailing whitespace from libstdc++ headersJonathan Wakely
* include/std/array: Remove trailing whitespace. * include/std/atomic: Likewise. * include/std/bitset: Likewise. * include/std/chrono: Likewise. * include/std/complex: Likewise. * include/std/condition_variable: Likewise. * include/std/fstream: Likewise. * include/std/functional: Likewise. * include/std/future: Likewise. * include/std/iomanip: Likewise. * include/std/iosfwd: Likewise. * include/std/istream: Likewise. * include/std/limits: Likewise. * include/std/ratio: Likewise. * include/std/scoped_allocator: Likewise. * include/std/sstream: Likewise. * include/std/stdexcept: Likewise. * include/std/string: Likewise. * include/std/system_error: Likewise. * include/std/thread: Likewise. * include/std/tuple: Likewise. * include/std/type_traits: Likewise. * include/std/utility: Likewise. * include/std/valarray: Likewise. * include/std/vector: Likewise. From-SVN: r237528
2016-04-18Define std::thread::id comparison operators at namespace-scopeJonathan Wakely
From-SVN: r235155
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