| 1 | //===---------- Linux implementation of the epoll_create 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_create.h" |
| 10 | |
| 11 | #include "src/__support/OSUtil/syscall.h" // For internal syscall function. |
| 12 | #include "src/__support/common.h" |
| 13 | #include "src/__support/libc_errno.h" |
| 14 | #include "src/__support/macros/config.h" |
| 15 | #include <sys/syscall.h> // For syscall numbers. |
| 16 | |
| 17 | namespace LIBC_NAMESPACE_DECL { |
| 18 | |
| 19 | LLVM_LIBC_FUNCTION(int, epoll_create, ([[maybe_unused]] int size)) { |
| 20 | #ifdef SYS_epoll_create |
| 21 | int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_epoll_create, size); |
| 22 | #elif defined(SYS_epoll_create1) |
| 23 | int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_epoll_create1, 0); |
| 24 | #else |
| 25 | #error \ |
| 26 | "epoll_create and epoll_create1 are unavailable. Unable to build epoll_create." |
| 27 | #endif |
| 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_DECL |
| 40 |