| //===-- Linux implementation of pipe --------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/unistd/pipe.h" |
| |
| #include "src/__support/OSUtil/syscall.h" // For internal syscall function. |
| #include "src/__support/common.h" |
| #include "src/__support/macros/sanitizer.h" // for MSAN_UNPOISON |
| #include "src/errno/libc_errno.h" |
| #include <sys/syscall.h> // For syscall numbers. |
| |
| namespace LIBC_NAMESPACE { |
| |
| LLVM_LIBC_FUNCTION(int, pipe, (int pipefd[2])) { |
| #ifdef SYS_pipe |
| int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_pipe, |
| reinterpret_cast<long>(pipefd)); |
| #elif defined(SYS_pipe2) |
| int ret = LIBC_NAMESPACE::syscall_impl<int>( |
| SYS_pipe2, reinterpret_cast<long>(pipefd), 0); |
| #endif |
| MSAN_UNPOISON(pipefd, sizeof(int) * 2); |
| if (ret < 0) { |
| libc_errno = -ret; |
| return -1; |
| } |
| return ret; |
| } |
| |
| } // namespace LIBC_NAMESPACE |