Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "thread-utils.h"
   3
   4#if defined(hpux) || defined(__hpux) || defined(_hpux)
   5#  include <sys/pstat.h>
   6#endif
   7
   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.
  12 */
  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
  20
  21int online_cpus(void)
  22{
  23#ifdef NO_PTHREADS
  24        return 1;
  25#else
  26#ifdef _SC_NPROCESSORS_ONLN
  27        long ncpus;
  28#endif
  29
  30#ifdef GIT_WINDOWS_NATIVE
  31        SYSTEM_INFO info;
  32        GetSystemInfo(&info);
  33
  34        if ((int)info.dwNumberOfProcessors > 0)
  35                return (int)info.dwNumberOfProcessors;
  36#elif defined(hpux) || defined(__hpux) || defined(_hpux)
  37        struct pst_dynamic psd;
  38
  39        if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
  40                return (int)psd.psd_proc_cnt;
  41#elif defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU)
  42        int mib[2];
  43        size_t len;
  44        int cpucount;
  45
  46        mib[0] = CTL_HW;
  47#  ifdef HW_AVAILCPU
  48        mib[1] = HW_AVAILCPU;
  49        len = sizeof(cpucount);
  50        if (!sysctl(mib, 2, &cpucount, &len, NULL, 0))
  51                return cpucount;
  52#  endif /* HW_AVAILCPU */
  53        mib[1] = HW_NCPU;
  54        len = sizeof(cpucount);
  55        if (!sysctl(mib, 2, &cpucount, &len, NULL, 0))
  56                return cpucount;
  57#endif /* defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU) */
  58
  59#ifdef _SC_NPROCESSORS_ONLN
  60        if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
  61                return (int)ncpus;
  62#endif
  63
  64        return 1;
  65#endif
  66}
  67
  68int init_recursive_mutex(pthread_mutex_t *m)
  69{
  70#ifndef NO_PTHREADS
  71        pthread_mutexattr_t a;
  72        int ret;
  73
  74        ret = pthread_mutexattr_init(&a);
  75        if (!ret) {
  76                ret = pthread_mutexattr_settype(&a, PTHREAD_MUTEX_RECURSIVE);
  77                if (!ret)
  78                        ret = pthread_mutex_init(m, &a);
  79                pthread_mutexattr_destroy(&a);
  80        }
  81        return ret;
  82#else
  83        return 0;
  84#endif
  85}
  86
  87#ifdef NO_PTHREADS
  88int dummy_pthread_create(pthread_t *pthread, const void *attr,
  89                         void *(*fn)(void *), void *data)
  90{
  91        /*
  92         * Do nothing.
  93         *
  94         * The main purpose of this function is to break compiler's
  95         * flow analysis and avoid -Wunused-variable false warnings.
  96         */
  97        return ENOSYS;
  98}
  99
 100int dummy_pthread_init(void *data)
 101{
 102        /*
 103         * Do nothing.
 104         *
 105         * The main purpose of this function is to break compiler's
 106         * flow analysis or it may realize that functions like
 107         * pthread_mutex_init() is no-op, which means the (static)
 108         * variable is not used/initialized at all and trigger
 109         * -Wunused-variable
 110         */
 111        return ENOSYS;
 112}
 113
 114int dummy_pthread_join(pthread_t pthread, void **retval)
 115{
 116        /*
 117         * Do nothing.
 118         *
 119         * The main purpose of this function is to break compiler's
 120         * flow analysis and avoid -Wunused-variable false warnings.
 121         */
 122        return ENOSYS;
 123}
 124
 125#endif