Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include <pthread.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 _SC_NPROCESSORS_ONLN
  24        long ncpus;
  25#endif
  26
  27#ifdef _WIN32
  28        SYSTEM_INFO info;
  29        GetSystemInfo(&info);
  30
  31        if ((int)info.dwNumberOfProcessors > 0)
  32                return (int)info.dwNumberOfProcessors;
  33#elif defined(hpux) || defined(__hpux) || defined(_hpux)
  34        struct pst_dynamic psd;
  35
  36        if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
  37                return (int)psd.psd_proc_cnt;
  38#endif
  39
  40#ifdef _SC_NPROCESSORS_ONLN
  41        if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
  42                return (int)ncpus;
  43#endif
  44
  45        return 1;
  46}
  47
  48int init_recursive_mutex(pthread_mutex_t *m)
  49{
  50        pthread_mutexattr_t a;
  51        int ret;
  52
  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);
  59        }
  60        return ret;
  61}