Merge branch 'jk/die-on-bogus-worktree-late'
[git.git] / thread-utils.c
bloba2135e0743ac60d8d4512210a81bac2102948fa1
1 #include "cache.h"
2 #include "thread-utils.h"
4 #if defined(hpux) || defined(__hpux) || defined(_hpux)
5 # include <sys/pstat.h>
6 #endif
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.
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
21 int online_cpus(void)
23 #ifdef _SC_NPROCESSORS_ONLN
24 long ncpus;
25 #endif
27 #ifdef GIT_WINDOWS_NATIVE
28 SYSTEM_INFO info;
29 GetSystemInfo(&info);
31 if ((int)info.dwNumberOfProcessors > 0)
32 return (int)info.dwNumberOfProcessors;
33 #elif defined(hpux) || defined(__hpux) || defined(_hpux)
34 struct pst_dynamic psd;
36 if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
37 return (int)psd.psd_proc_cnt;
38 #elif defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU)
39 int mib[2];
40 size_t len;
41 int cpucount;
43 mib[0] = CTL_HW;
44 # ifdef HW_AVAILCPU
45 mib[1] = HW_AVAILCPU;
46 len = sizeof(cpucount);
47 if (!sysctl(mib, 2, &cpucount, &len, NULL, 0))
48 return cpucount;
49 # endif /* HW_AVAILCPU */
50 mib[1] = HW_NCPU;
51 len = sizeof(cpucount);
52 if (!sysctl(mib, 2, &cpucount, &len, NULL, 0))
53 return cpucount;
54 #endif /* defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU) */
56 #ifdef _SC_NPROCESSORS_ONLN
57 if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
58 return (int)ncpus;
59 #endif
61 return 1;
64 int init_recursive_mutex(pthread_mutex_t *m)
66 pthread_mutexattr_t a;
67 int ret;
69 ret = pthread_mutexattr_init(&a);
70 if (!ret) {
71 ret = pthread_mutexattr_settype(&a, PTHREAD_MUTEX_RECURSIVE);
72 if (!ret)
73 ret = pthread_mutex_init(m, &a);
74 pthread_mutexattr_destroy(&a);
76 return ret;