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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 NO_PTHREADS
return 1;
#else
#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;
#endif
}
int init_recursive_mutex(pthread_mutex_t *m)
{
#ifndef NO_PTHREADS
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;
#else
return 0;
#endif
}
#ifdef NO_PTHREADS
int dummy_pthread_create(pthread_t *pthread, const void *attr,
void *(*fn)(void *), void *data)
{
/*
* Do nothing.
*
* The main purpose of this function is to break compiler's
* flow analysis and avoid -Wunused-variable false warnings.
*/
return ENOSYS;
}
int dummy_pthread_init(void *data)
{
/*
* Do nothing.
*
* The main purpose of this function is to break compiler's
* flow analysis or it may realize that functions like
* pthread_mutex_init() is no-op, which means the (static)
* variable is not used/initialized at all and trigger
* -Wunused-variable
*/
return ENOSYS;
}
int dummy_pthread_join(pthread_t pthread, void **retval)
{
/*
* Do nothing.
*
* The main purpose of this function is to break compiler's
* flow analysis and avoid -Wunused-variable false warnings.
*/
return ENOSYS;
}
#endif