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//===-- 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/libc_errno.h"
#include "src/__support/macros/config.h"
#include "src/__support/macros/sanitizer.h" // for MSAN_UNPOISON
#include <sys/syscall.h> // For syscall numbers.
namespace LIBC_NAMESPACE_DECL {
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_DECL
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