mirror of
https://github.com/git/git.git
synced 2024-11-26 03:14:50 +08:00
a25b5a32c7
Not all systems support using sysconf to detect the number of available CPU cores. Older BSD and BSD-derived systems only provide the information via the sysctl function. If HAVE_BSD_SYSCTL is defined attempt to retrieve the number of available CPU cores using the sysctl function. If HAVE_BSD_SYSCTL is not defined or the sysctl function fails, we still attempt to get the information via sysconf. Signed-off-by: Kyle J. McKay <mackyle@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
#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;
|
|
}
|