libc/src/unistd/linux/pipe2.cpp

   1 //===-- Linux implementation of pipe --------------------------------------===//
   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/unistd/pipe2.h"
  10
  11 #include "src/__support/OSUtil/syscall.h" // For internal syscall function.
  12 #include "src/__support/common.h"
  13 #include "src/__support/macros/config.h"
  14 #include "src/errno/libc_errno.h"
  15 #include <sys/syscall.h> // For syscall numbers.
  16
  17 namespace LIBC_NAMESPACE_DECL {
  18
  19 LLVM_LIBC_FUNCTION(int, pipe2, (int pipefd[2], int flags)) {
  20   int ret = LIBC_NAMESPACE::syscall_impl<int>(
  21       SYS_pipe2, reinterpret_cast<long>(pipefd), flags);
  22   if (ret < 0) {
  23     libc_errno = -ret;
  24     return -1;
  25   }
  26   MSAN_UNPOISON(pipefd, sizeof(int) * 2);
  27   return ret;
  28 }
  29
  30 } // namespace LIBC_NAMESPACE_DECL