diff options
Diffstat (limited to 'libc/src/errno/libc_errno.cpp')
| -rw-r--r-- | libc/src/errno/libc_errno.cpp | 47 |
1 files changed, 6 insertions, 41 deletions
diff --git a/libc/src/errno/libc_errno.cpp b/libc/src/errno/libc_errno.cpp index d1600d1b050e..8ff1eec1b103 100644 --- a/libc/src/errno/libc_errno.cpp +++ b/libc/src/errno/libc_errno.cpp @@ -6,51 +6,14 @@ // //===----------------------------------------------------------------------===// -#include "libc_errno.h" +#include "src/__support/libc_errno.h" +#include "src/__support/macros/attributes.h" #include "src/__support/macros/config.h" -// libc uses a fallback default value, either system or thread local. -#define LIBC_ERRNO_MODE_DEFAULT 0 -// libc never stores a value; `errno` macro uses get link-time failure. -#define LIBC_ERRNO_MODE_UNDEFINED 1 -// libc maintains per-thread state (requires C++ `thread_local` support). -#define LIBC_ERRNO_MODE_THREAD_LOCAL 2 -// libc maintains shared state used by all threads, contrary to standard C -// semantics unless always single-threaded; nothing prevents data races. -#define LIBC_ERRNO_MODE_SHARED 3 -// libc doesn't maintain any internal state, instead the embedder must define -// `int *__llvm_libc_errno(void);` C function. -#define LIBC_ERRNO_MODE_EXTERNAL 4 -// libc uses system `<errno.h>` `errno` macro directly in the overlay mode; in -// fullbuild mode, effectively the same as `LIBC_ERRNO_MODE_EXTERNAL`. -#define LIBC_ERRNO_MODE_SYSTEM 5 - -#if !defined(LIBC_ERRNO_MODE) || LIBC_ERRNO_MODE == LIBC_ERRNO_MODE_DEFAULT -#undef LIBC_ERRNO_MODE -#if defined(LIBC_FULL_BUILD) || !defined(LIBC_COPT_PUBLIC_PACKAGING) -#define LIBC_ERRNO_MODE LIBC_ERRNO_MODE_THREAD_LOCAL -#else -#define LIBC_ERRNO_MODE LIBC_ERRNO_MODE_SYSTEM -#endif -#endif // LIBC_ERRNO_MODE - -#if LIBC_ERRNO_MODE != LIBC_ERRNO_MODE_DEFAULT && \ - LIBC_ERRNO_MODE != LIBC_ERRNO_MODE_UNDEFINED && \ - LIBC_ERRNO_MODE != LIBC_ERRNO_MODE_THREAD_LOCAL && \ - LIBC_ERRNO_MODE != LIBC_ERRNO_MODE_SHARED && \ - LIBC_ERRNO_MODE != LIBC_ERRNO_MODE_EXTERNAL && \ - LIBC_ERRNO_MODE != LIBC_ERRNO_MODE_SYSTEM -#error LIBC_ERRNO_MODE must be one of the following values: \ -LIBC_ERRNO_MODE_DEFAULT, \ -LIBC_ERRNO_MODE_UNDEFINED, \ -LIBC_ERRNO_MODE_THREAD_LOCAL, \ -LIBC_ERRNO_MODE_SHARED, \ -LIBC_ERRNO_MODE_EXTERNAL, \ -LIBC_ERRNO_MODE_SYSTEM -#endif - namespace LIBC_NAMESPACE_DECL { +#if LIBC_ERRNO_MODE != LIBC_ERRNO_MODE_SYSTEM_INLINE + #if LIBC_ERRNO_MODE == LIBC_ERRNO_MODE_UNDEFINED void Errno::operator=(int) {} @@ -93,4 +56,6 @@ Errno::operator int() { return errno; } // Define the global `libc_errno` instance. Errno libc_errno; +#endif // LIBC_ERRNO_MODE != LIBC_ERRNO_MODE_SYSTEM_INLINE + } // namespace LIBC_NAMESPACE_DECL |