/*******************************************************************/

/*  sltdl: a surrogate ltdl implementation                         */

/*  Copyright (C) 2019 Z. Gilboa                                   */

/*  Released under the Standard MIT License; see COPYING.SLTDL.    */

/*******************************************************************/

#include <limits.h>

#include <pthread.h>

#include <sltdl/sltdl.h>

static int             lt_refs = 0;

static pthread_mutex_t lt_lock = PTHREAD_MUTEX_INITIALIZER;

int lt_dlinit(void)

{

	if (pthread_mutex_lock(&lt_lock))

		return 1;

	lt_refs++;

	pthread_mutex_unlock(&lt_lock);

	return 0;

}

int lt_dlexit(void)

{

	if (pthread_mutex_lock(&lt_lock))

		return 1;

	if (!lt_refs) {

		pthread_mutex_unlock(&lt_lock);

		return 1;

	}

	lt_refs--;

	pthread_mutex_unlock(&lt_lock);

	return 0;

}

void lt_slock(void)

{

	int locked;

	do {

		locked = pthread_mutex_lock(&lt_lock);

	} while (locked);

}

int lt_sunlock(int ret)

{

	pthread_mutex_unlock(&lt_lock);

	return ret;

}