27 lines · cpp
1//===---------- Linux implementation of the msync 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/mman/msync.h"10 11#include "src/__support/OSUtil/syscall.h" // For internal syscall function.12 13#include "src/__support/libc_errno.h"14#include "src/__support/macros/config.h"15#include <sys/syscall.h> // For syscall numbers.16 17namespace LIBC_NAMESPACE_DECL {18LLVM_LIBC_FUNCTION(int, msync, (void *addr, size_t len, int flags)) {19 long ret = syscall_impl(SYS_msync, cpp::bit_cast<long>(addr), len, flags);20 if (ret < 0) {21 libc_errno = static_cast<int>(-ret);22 return -1;23 }24 return 0;25}26} // namespace LIBC_NAMESPACE_DECL27