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49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
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#include "cache.h"
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#ifdef _WIN32
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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#elif defined(hpux) || defined(__hpux) || defined(_hpux)
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# include <sys/pstat.h>
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#endif
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/*
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* By doing this in two steps we can at least get
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* the function to be somewhat coherent, even
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* with this disgusting nest of #ifdefs.
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*/
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#ifndef _SC_NPROCESSORS_ONLN
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# ifdef _SC_NPROC_ONLN
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# define _SC_NPROCESSORS_ONLN _SC_NPROC_ONLN
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# elif defined _SC_CRAY_NCPU
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# define _SC_NPROCESSORS_ONLN _SC_CRAY_NCPU
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# endif
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#endif
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int online_cpus(void)
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{
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#ifdef _SC_NPROCESSORS_ONLN
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long ncpus;
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#endif
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#ifdef _WIN32
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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if ((int)info.dwNumberOfProcessors > 0)
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return (int)info.dwNumberOfProcessors;
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#elif defined(hpux) || defined(__hpux) || defined(_hpux)
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struct pst_dynamic psd;
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if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
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return (int)psd.psd_proc_cnt;
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#endif
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#ifdef _SC_NPROCESSORS_ONLN
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if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
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return (int)ncpus;
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#endif
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return 1;
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}
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