36 lines · cpp
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-exception6//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 the26 // 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_DECL36