1 //===-- Implementation of sched_getcpucount -------------------------------===// 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_getcpucount.h" 10 11 #include "src/__support/common.h" 12 #include "src/__support/macros/config.h" 13 14 #include <sched.h> 15 #include <stddef.h> 16 17 namespace LIBC_NAMESPACE_DECL { 18 19 LLVM_LIBC_FUNCTION(int, __sched_getcpucount, 20 (size_t cpuset_size, const cpu_set_t *mask)) { 21 int result = 0; 22 for (size_t i = 0; i < cpuset_size / sizeof(long); ++i) { 23 result += __builtin_popcountl(mask->__mask[i]); 24 } 25 return result; 26 } 27 28 } // namespace LIBC_NAMESPACE_DECL 29