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git/thread-utils.c
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#include "cache.h" | |
#include "thread-utils.h" | |
#if defined(hpux) || defined(__hpux) || defined(_hpux) | |
# include <sys/pstat.h> | |
#endif | |
/* | |
* By doing this in two steps we can at least get | |
* the function to be somewhat coherent, even | |
* with this disgusting nest of #ifdefs. | |
*/ | |
#ifndef _SC_NPROCESSORS_ONLN | |
# ifdef _SC_NPROC_ONLN | |
# define _SC_NPROCESSORS_ONLN _SC_NPROC_ONLN | |
# elif defined _SC_CRAY_NCPU | |
# define _SC_NPROCESSORS_ONLN _SC_CRAY_NCPU | |
# endif | |
#endif | |
int online_cpus(void) | |
{ | |
#ifdef _SC_NPROCESSORS_ONLN | |
long ncpus; | |
#endif | |
#ifdef GIT_WINDOWS_NATIVE | |
SYSTEM_INFO info; | |
GetSystemInfo(&info); | |
if ((int)info.dwNumberOfProcessors > 0) | |
return (int)info.dwNumberOfProcessors; | |
#elif defined(hpux) || defined(__hpux) || defined(_hpux) | |
struct pst_dynamic psd; | |
if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0)) | |
return (int)psd.psd_proc_cnt; | |
#elif defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU) | |
int mib[2]; | |
size_t len; | |
int cpucount; | |
mib[0] = CTL_HW; | |
# ifdef HW_AVAILCPU | |
mib[1] = HW_AVAILCPU; | |
len = sizeof(cpucount); | |
if (!sysctl(mib, 2, &cpucount, &len, NULL, 0)) | |
return cpucount; | |
# endif /* HW_AVAILCPU */ | |
mib[1] = HW_NCPU; | |
len = sizeof(cpucount); | |
if (!sysctl(mib, 2, &cpucount, &len, NULL, 0)) | |
return cpucount; | |
#endif /* defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU) */ | |
#ifdef _SC_NPROCESSORS_ONLN | |
if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0) | |
return (int)ncpus; | |
#endif | |
return 1; | |
} | |
int init_recursive_mutex(pthread_mutex_t *m) | |
{ | |
pthread_mutexattr_t a; | |
int ret; | |
ret = pthread_mutexattr_init(&a); | |
if (!ret) { | |
ret = pthread_mutexattr_settype(&a, PTHREAD_MUTEX_RECURSIVE); | |
if (!ret) | |
ret = pthread_mutex_init(m, &a); | |
pthread_mutexattr_destroy(&a); | |
} | |
return ret; | |
} |