1 // Copyright 2012 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
8 // CPU_COUNT is only provided by glibc 2.6 or higher
9 #if !defined(__GLIBC_PREREQ) || !__GLIBC_PREREQ(2, 6)
10 #define CPU_COUNT(set) _CPU_COUNT((unsigned int *)(set), sizeof(*(set))/sizeof(unsigned int))
11 static int _CPU_COUNT(unsigned int *set, size_t len) {
16 cnt += __builtin_popcount(*set++);
31 r = sched_getaffinity(0, sizeof(set), &set);
33 cnt += CPU_COUNT(&set);