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/CPP/bit.h" 12 #include "src/__support/common.h" 13 #include "src/__support/macros/config.h" 14 15 #include <sched.h> 16 #include <stddef.h> 17 18 namespace LIBC_NAMESPACE_DECL { 19 20 LLVM_LIBC_FUNCTION(int, __sched_getcpucount, 21 (size_t cpuset_size, const cpu_set_t *mask)) { 22 int result = 0; 23 for (size_t i = 0; i < cpuset_size / sizeof(long); ++i) { 24 result += cpp::popcount(mask->__mask[i]); 25 } 26 return result; 27 } 28 29 } // namespace LIBC_NAMESPACE_DECL 30