/*

 * Copyright (c) 2016-2019, NVIDIA CORPORATION. All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 */

/* To include PTHREAD_MUTEX_ERRORCHECK */

#ifndef _GNU_SOURCE

#define _GNU_SOURCE

#endif

#include "wayland-thread.h"

#include "wayland-egldisplay.h"

#include <stdlib.h>

#include <assert.h>

#if defined(__QNX__)

#define WL_EGL_ATTRIBUTE_DESTRUCTOR

#define WL_EGL_ATEXIT(func) atexit(func)

#else

#define WL_EGL_ATTRIBUTE_DESTRUCTOR __attribute__((destructor))

#define WL_EGL_ATEXIT(func) 0

#endif

static pthread_mutex_t wlMutex;

static pthread_once_t  wlMutexOnceControl = PTHREAD_ONCE_INIT;

static int             wlMutexInitialized = 0;

static void wlExternalApiInitializeLock(void)

{

    pthread_mutexattr_t attr;

    if (pthread_mutexattr_init(&attr)) {

        assert(!"failed to initialize pthread attribute mutex");

        return;

    }

    if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK)) {

        assert(!"failed to set pthread attribute mutex errorcheck");

        goto fail;

    }

    if (pthread_mutex_init(&wlMutex, &attr)) {

        assert(!"failed to initialize pthread mutex");

        goto fail;

    }

    wlMutexInitialized = 1;

fail:

    if (pthread_mutexattr_destroy(&attr)) {

        assert(!"failed to destroy pthread attribute mutex");

    }

}

void wlExternalApiDestroyLock(void)

{

    if (!wlMutexInitialized || pthread_mutex_destroy(&wlMutex)) {

        assert(!"failed to destroy pthread mutex");

    }

}

int wlExternalApiLock(void)

{

    if (pthread_once(&wlMutexOnceControl, wlExternalApiInitializeLock)) {

        assert(!"pthread once failed");

        return -1;

    }

    if (!wlMutexInitialized || pthread_mutex_lock(&wlMutex)) {

        assert(!"failed to lock pthread mutex");

        return -1;

    }

    return 0;

}

int wlExternalApiUnlock(void)

{

    if (!wlMutexInitialized || pthread_mutex_unlock(&wlMutex)) {

        assert(!"failed to unlock pthread mutex");

        return -1;

    }

    return 0;

}

bool wlEglInitializeMutex(pthread_mutex_t *mutex)

{

    pthread_mutexattr_t attr;

    bool ret = true;

    if (pthread_mutexattr_init(&attr)) {

        return false;

    }

    if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK)) {

        ret = false;

        goto done;

    }

    if (pthread_mutex_init(mutex, &attr)) {

        ret = false;

        goto done;

    }

done:

    pthread_mutexattr_destroy(&attr);

    return ret;

}

void wlEglMutexDestroy(pthread_mutex_t *mutex)

{

    pthread_mutex_destroy(mutex);

}