1//===---------- Linux implementation of the epoll_ctl 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_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
18namespace LIBC_NAMESPACE_DECL {
19
20LLVM_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

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source code of libc/src/sys/epoll/linux/epoll_ctl.cpp