libc/src/sched/linux/sched_setaffinity.cpp

   1 //===-- Implementation of sched_setaffinity -------------------------------===//
   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/sched/sched_setaffinity.h"
  10
  11 #include "src/__support/OSUtil/syscall.h" // For internal syscall function.
  12 #include "src/__support/common.h"
  13 #include "src/errno/libc_errno.h"
  14
  15 #include <sched.h>
  16 #include <sys/syscall.h> // For syscall numbers.
  17
  18 namespace __llvm_libc {
  19
  20 LLVM_LIBC_FUNCTION(int, sched_setaffinity,
  21                    (pid_t tid, size_t cpuset_size, const cpu_set_t *mask)) {
  22   int ret = __llvm_libc::syscall_impl<int>(SYS_sched_setaffinity, tid,
  23                                            cpuset_size, mask);
  24   if (ret < 0) {
  25     libc_errno = -ret;
  26     return -1;
  27   }
  28   return 0;
  29 }
  30
  31 } // namespace __llvm_libc