1 | //===---------- Linux implementation of the epoll_pwait function ----------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #include "src/sys/epoll/epoll_pwait.h" |
10 | |
11 | #include "hdr/signal_macros.h" // for NSIG |
12 | #include "hdr/types/sigset_t.h" |
13 | #include "hdr/types/struct_epoll_event.h" |
14 | #include "src/__support/OSUtil/syscall.h" // For internal syscall function. |
15 | #include "src/__support/common.h" |
16 | #include "src/errno/libc_errno.h" |
17 | |
18 | #include <sys/syscall.h> // For syscall numbers. |
19 | |
20 | namespace LIBC_NAMESPACE { |
21 | |
22 | LLVM_LIBC_FUNCTION(int, epoll_pwait, |
23 | (int epfd, struct epoll_event *events, int maxevents, |
24 | int timeout, const sigset_t *sigmask)) { |
25 | int ret = LIBC_NAMESPACE::syscall_impl<int>( |
26 | SYS_epoll_pwait, ts: epfd, ts: reinterpret_cast<long>(events), ts: maxevents, ts: timeout, |
27 | ts: reinterpret_cast<long>(sigmask), NSIG / 8); |
28 | |
29 | // A negative return value indicates an error with the magnitude of the |
30 | // value being the error code. |
31 | if (ret < 0) { |
32 | libc_errno = -ret; |
33 | return -1; |
34 | } |
35 | |
36 | return ret; |
37 | } |
38 | |
39 | } // namespace LIBC_NAMESPACE |
40 | |