Start preparing for 1.8.4.2
[alt-git.git] / thread-utils.c
blob97396a75ae4fc3f118750dd687fba85e3fc526cc
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 #endif
40 #ifdef _SC_NPROCESSORS_ONLN
41 if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
42 return (int)ncpus;
43 #endif
45 return 1;
48 int init_recursive_mutex(pthread_mutex_t *m)
50 pthread_mutexattr_t a;
51 int ret;
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);
60 return ret;