git/thread-utils.c

#include "git-compat-util.h"
#include "thread-utils.h"

#if 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 …
#  elif defined _SC_CRAY_NCPU
#define _SC_NPROCESSORS_ONLN …
#  endif
#endif

int online_cpus(void)
{ … }

int init_recursive_mutex(pthread_mutex_t *m)
{ … }

#ifdef NO_PTHREADS
int dummy_pthread_create(pthread_t *pthread, const void *attr,
			 void *(*fn)(void *), void *data)
{
	/*
	 * Do nothing.
	 *
	 * The main purpose of this function is to break compiler's
	 * flow analysis and avoid -Wunused-variable false warnings.
	 */
	return ENOSYS;
}

int dummy_pthread_init(void *data)
{
	/*
	 * Do nothing.
	 *
	 * The main purpose of this function is to break compiler's
	 * flow analysis or it may realize that functions like
	 * pthread_mutex_init() is no-op, which means the (static)
	 * variable is not used/initialized at all and trigger
	 * -Wunused-variable
	 */
	return ENOSYS;
}

int dummy_pthread_join(pthread_t pthread, void **retval)
{
	/*
	 * Do nothing.
	 *
	 * The main purpose of this function is to break compiler's
	 * flow analysis and avoid -Wunused-variable false warnings.
	 */
	return ENOSYS;
}

#endif