mirror of
https://review.haiku-os.org/buildtools
synced 2025-02-14 17:57:39 +01:00
37 lines
737 B
C
37 lines
737 B
C
|
// Copyright 2012 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
#include <features.h>
|
||
|
|
#include <sched.h>
|
||
|
|
|
||
|
|
// CPU_COUNT is only provided by glibc 2.6 or higher
|
||
|
|
#ifndef CPU_COUNT
|
||
|
|
#define CPU_COUNT(set) _CPU_COUNT((unsigned int *)(set), sizeof(*(set))/sizeof(unsigned int))
|
||
|
|
static int _CPU_COUNT(unsigned int *set, size_t len) {
|
||
|
|
int cnt;
|
||
|
|
|
||
|
|
cnt = 0;
|
||
|
|
while (len--)
|
||
|
|
cnt += __builtin_popcount(*set++);
|
||
|
|
return cnt;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "runtime.h"
|
||
|
|
#include "defs.h"
|
||
|
|
|
||
|
|
int32
|
||
|
|
getproccount(void)
|
||
|
|
{
|
||
|
|
cpu_set_t set;
|
||
|
|
int32 r, cnt;
|
||
|
|
|
||
|
|
cnt = 0;
|
||
|
|
r = sched_getaffinity(0, sizeof(set), &set);
|
||
|
|
if(r == 0)
|
||
|
|
cnt += CPU_COUNT(&set);
|
||
|
|
|
||
|
|
return cnt ? cnt : 1;
|
||
|
|
}
|