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-exception 6 // 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/errno/libc_errno.h" 14 #include <sys/syscall.h> // For syscall numbers. 15 16 namespace LIBC_NAMESPACE { 17 LLVM_LIBC_FUNCTION(int, msync, (void *addr, size_t len, int flags)) { 18 long ret = syscall_impl(SYS_msync, cpp::bit_cast<long>(addr), len, flags); 19 if (ret < 0) { 20 libc_errno = static_cast<int>(-ret); 21 return -1; 22 } 23 return 0; 24 } 25 } // namespace LIBC_NAMESPACE 26