Update drart release notes to 1.7.5
[git/git.git] / thread-utils.c
CommitLineData
833e3df1 1#include "cache.h"
93749194 2#include <pthread.h>
833e3df1 3
435bdf8c 4#if defined(hpux) || defined(__hpux) || defined(_hpux)
833e3df1
AE
5# include <sys/pstat.h>
6#endif
7
8/*
9 * By doing this in two steps we can at least get
10 * the function to be somewhat coherent, even
11 * with this disgusting nest of #ifdefs.
12 */
13#ifndef _SC_NPROCESSORS_ONLN
14# ifdef _SC_NPROC_ONLN
15# define _SC_NPROCESSORS_ONLN _SC_NPROC_ONLN
16# elif defined _SC_CRAY_NCPU
17# define _SC_NPROCESSORS_ONLN _SC_CRAY_NCPU
18# endif
19#endif
20
21int online_cpus(void)
22{
23#ifdef _SC_NPROCESSORS_ONLN
24 long ncpus;
25#endif
26
27#ifdef _WIN32
28 SYSTEM_INFO info;
29 GetSystemInfo(&info);
30
31 if ((int)info.dwNumberOfProcessors > 0)
32 return (int)info.dwNumberOfProcessors;
33#elif defined(hpux) || defined(__hpux) || defined(_hpux)
34 struct pst_dynamic psd;
35
36 if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
37 return (int)psd.psd_proc_cnt;
38#endif
39
40#ifdef _SC_NPROCESSORS_ONLN
41 if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
42 return (int)ncpus;
43#endif
44
45 return 1;
46}
93749194
JS
47
48int init_recursive_mutex(pthread_mutex_t *m)
49{
50 pthread_mutexattr_t a;
51 int ret;
52
53 ret = pthread_mutexattr_init(&a);
54 if (!ret) {
55 ret = pthread_mutexattr_settype(&a, PTHREAD_MUTEX_RECURSIVE);
56 if (!ret)
57 ret = pthread_mutex_init(m, &a);
58 pthread_mutexattr_destroy(&a);
59 }
60 return ret;
61}