/*

 * Copyright (C) the libgit2 contributors. All rights reserved.

 *

 * This file is part of libgit2, distributed under the GNU GPL v2 with

 * a Linking Exception. For full terms see the included COPYING file.

 */

#include "common.h"

#include "thread-utils.h"

#ifdef _WIN32

#ifndef WIN32_LEAN_AND_MEAN

#	define WIN32_LEAN_AND_MEAN

#endif

#	include <windows.h>

#elif 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 git_online_cpus(void)

{

#ifdef _SC_NPROCESSORS_ONLN

	long ncpus;

#endif

#ifdef _WIN32

	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;

#endif

#ifdef _SC_NPROCESSORS_ONLN

	if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)

		return (int)ncpus;

#endif

	return 1;

}