git

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#include "git-compat-util.h"
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#include "thread-utils.h"
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#if 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 NO_PTHREADS
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	return 1;
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#else
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#ifdef _SC_NPROCESSORS_ONLN
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	long ncpus;
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#endif
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#ifdef GIT_WINDOWS_NATIVE
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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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#elif defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU)
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	int mib[2];
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	size_t len;
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	int cpucount;
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	mib[0] = CTL_HW;
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#  ifdef HW_AVAILCPU
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	mib[1] = HW_AVAILCPU;
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	len = sizeof(cpucount);
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	if (!sysctl(mib, 2, &cpucount, &len, NULL, 0))
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		return cpucount;
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#  endif /* HW_AVAILCPU */
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	mib[1] = HW_NCPU;
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	len = sizeof(cpucount);
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	if (!sysctl(mib, 2, &cpucount, &len, NULL, 0))
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		return cpucount;
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#endif /* defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU) */
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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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#endif
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}
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int init_recursive_mutex(pthread_mutex_t *m)
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{
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#ifndef NO_PTHREADS
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	pthread_mutexattr_t a;
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	int ret;
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	ret = pthread_mutexattr_init(&a);
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	if (!ret) {
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		ret = pthread_mutexattr_settype(&a, PTHREAD_MUTEX_RECURSIVE);
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		if (!ret)
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			ret = pthread_mutex_init(m, &a);
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		pthread_mutexattr_destroy(&a);
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	}
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	return ret;
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#else
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	return 0;
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#endif
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}
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#ifdef NO_PTHREADS
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int dummy_pthread_create(pthread_t *pthread, const void *attr,
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			 void *(*fn)(void *), void *data)
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{
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	/*
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	 * Do nothing.
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	 *
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	 * The main purpose of this function is to break compiler's
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	 * flow analysis and avoid -Wunused-variable false warnings.
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	 */
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	return ENOSYS;
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}
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int dummy_pthread_init(void *data)
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{
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	/*
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	 * Do nothing.
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	 *
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	 * The main purpose of this function is to break compiler's
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	 * flow analysis or it may realize that functions like
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	 * pthread_mutex_init() is no-op, which means the (static)
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	 * variable is not used/initialized at all and trigger
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	 * -Wunused-variable
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	 */
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	return ENOSYS;
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}
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int dummy_pthread_join(pthread_t pthread, void **retval)
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{
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	/*
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	 * Do nothing.
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	 *
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	 * The main purpose of this function is to break compiler's
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	 * flow analysis and avoid -Wunused-variable false warnings.
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	 */
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	return ENOSYS;
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}
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#endif
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