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/*
Minetest
Copyright (C) 2013 sapier <sapier AT gmx DOT net>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "threading/semaphore.h"

#include <iostream>
#include <cstdlib>
#include <cassert>

#define UNUSED(expr) do { (void)(expr); } while (0)

#ifdef _WIN32
	#include <climits>
	#define MAX_SEMAPHORE_COUNT LONG_MAX - 1
#else
	#include <cerrno>
	#include <sys/time.h>
	#include <pthread.h>
	#if defined(__MACH__) && defined(__APPLE__)
		#include <mach/mach.h>
		#include <mach/task.h>
		#include <mach/semaphore.h>
		#include <sys/semaphore.h>
		#include <unistd.h>

		#undef sem_t
		#undef sem_init
		#undef sem_wait
		#undef sem_post
		#undef sem_destroy
		#define sem_t             semaphore_t
		#define sem_init(s, p, c) semaphore_create(mach_task_self(), (s), 0, (c))
		#define sem_wait(s)       semaphore_wait(*(s))
		#define sem_post(s)       semaphore_signal(*(s))
		#define sem_destroy(s)    semaphore_destroy(mach_task_self(), *(s))
	#endif
#endif


Semaphore::Semaphore(int val)