Make xmalloc and xrealloc thread-safe
[git/git.git] / thread-utils.c
CommitLineData
833e3df1
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1#include "cache.h"
2
435bdf8c 3#if defined(hpux) || defined(__hpux) || defined(_hpux)
833e3df1
AE
4# include <sys/pstat.h>
5#endif
6
7/*
8 * By doing this in two steps we can at least get
9 * the function to be somewhat coherent, even
10 * with this disgusting nest of #ifdefs.
11 */
12#ifndef _SC_NPROCESSORS_ONLN
13# ifdef _SC_NPROC_ONLN
14# define _SC_NPROCESSORS_ONLN _SC_NPROC_ONLN
15# elif defined _SC_CRAY_NCPU
16# define _SC_NPROCESSORS_ONLN _SC_CRAY_NCPU
17# endif
18#endif
19
20int online_cpus(void)
21{
22#ifdef _SC_NPROCESSORS_ONLN
23 long ncpus;
24#endif
25
26#ifdef _WIN32
27 SYSTEM_INFO info;
28 GetSystemInfo(&info);
29
30 if ((int)info.dwNumberOfProcessors > 0)
31 return (int)info.dwNumberOfProcessors;
32#elif defined(hpux) || defined(__hpux) || defined(_hpux)
33 struct pst_dynamic psd;
34
35 if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
36 return (int)psd.psd_proc_cnt;
37#endif
38
39#ifdef _SC_NPROCESSORS_ONLN
40 if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
41 return (int)ncpus;
42#endif
43
44 return 1;
45}