llvm-project.git/libc/src/sys/epoll/linux/epoll_create.cpp, branch main

[libc] Fix epoll_create behavior when only epoll_create1 is available (#149713)

2025-07-20T18:40:55+00:00

In PR #99785, I disabled a test for `epoll_create` that was intended to
fail on systems where only `epoll_create1` is available. This is because
`epoll_create1` cannot fail in the same way that `epoll_create` does.

Specifically, calling `epoll_create(0)` should result in an EINVAL
error. So, when only `epoll_create1` is available, we should simply
check if the argument is zero and return the error accordingly.

[libc] Move libc_errno.h to libc/src/__support and make LIBC_ERRNO_MODE_SYSTEM to be header-only. (#143187)

2025-06-11T20:25:27+00:00

This is the first step in preparation for:
https://discourse.llvm.org/t/rfc-make-clang-builtin-math-functions-constexpr-with-llvm-libc-to-support-c-23-constexpr-math-functions/86450

[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597)

2024-07-12T16:28:41+00:00

This is a part of #97655.

Revert "[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration" (#98593)

2024-07-12T07:12:13+00:00

Reverts llvm/llvm-project#98075

bots are broken

[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98075)

2024-07-11T19:35:22+00:00

This is a part of #97655.

[libc] add remaining epoll functions, pipe (#84587)

2024-04-11T23:26:49+00:00

The epoll_wait functions need the rest of the epoll functions (create,
ctl) to be available to actually test them, as well as pipe to create a
usable file descriptor. This patch adds epoll_create, epoll_create1,
epoll_ctl, and pipe. These have tests, and the tests for epoll_wait,
epoll_pwait, and epoll_pwait2 (currently disabled) are updated to use
these newly available functions.