1 | //===---------- Linux implementation of the epoll_ctl function ----------===// |
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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_ctl.h" |
10 | |
11 | #include "hdr/types/struct_epoll_event.h" |
12 | #include "src/__support/OSUtil/syscall.h" // For internal syscall function. |
13 | #include "src/__support/common.h" |
14 | #include "src/__support/libc_errno.h" |
15 | #include "src/__support/macros/config.h" |
16 | #include <sys/syscall.h> // For syscall numbers. |
17 | |
18 | namespace LIBC_NAMESPACE_DECL { |
19 | |
20 | LLVM_LIBC_FUNCTION(int, epoll_ctl, |
21 | (int epfd, int op, int fd, epoll_event *event)) { |
22 | int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_epoll_ctl, epfd, op, fd, |
23 | reinterpret_cast<long>(event)); |
24 | |
25 | // A negative return value indicates an error with the magnitude of the |
26 | // value being the error code. |
27 | if (ret < 0) { |
28 | libc_errno = -ret; |
29 | return -1; |
30 | } |
31 | |
32 | return ret; |
33 | } |
34 | |
35 | } // namespace LIBC_NAMESPACE_DECL |
36 |