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/*
 * YaGL
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd. All rights reserved.
 *
 * Contact :
 * Stanislav Vorobiov <s.vorobiov@samsung.com>
 * Jinhyung Jo <jinhyung.jo@samsung.com>
 * YeongKyoon Lee <yeongkyoon.lee@samsung.com>
 *
 * 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.
 *
 * Contributors:
 * - S-Core Co., Ltd
 *
 */

#include "GL/gl.h"
#include "yagl_context.h"
#include "yagl_malloc.h"
#include "yagl_utils.h"
#include "yagl_display.h"
#include "yagl_fence.h"
#include "yagl_transport.h"
#include "yagl_state.h"
#include "yagl_client_context.h"

static void yagl_context_destroy(struct yagl_ref *ref)
{
    struct yagl_context *ctx = (struct yagl_context*)ref;

    yagl_fence_release(ctx->throttle_fence);

    pthread_mutex_destroy(&ctx->mtx);

    ctx->client_ctx->destroy(ctx->client_ctx);

    yagl_resource_cleanup(&ctx->res);

    yagl_free(ctx);
}

struct yagl_context
    *yagl_context_create(yagl_host_handle handle,
                         struct yagl_display *dpy,
                         struct yagl_client_context *client_ctx)
{
    struct yagl_context *ctx;

    ctx = yagl_malloc0(sizeof(*ctx));

    yagl_resource_init(&ctx->res, &yagl_context_destroy, handle);

    ctx->dpy = dpy;
    ctx->client_ctx = client_ctx;

    yagl_mutex_init(&ctx->mtx);

    return ctx;
}

void yagl_context_set_need_throttle(struct yagl_context *ctx,
                                    struct yagl_fence *throttle_fence)
{
    ctx->need_throttle = 1;
    yagl_fence_acquire(throttle_fence);
    yagl_fence_release(ctx->throttle_fence);
    ctx->throttle_fence = throttle_fence;
}

void yagl_context_throttle(struct yagl_context *ctx)
{
    if (!ctx->need_throttle) {
        return;
    }

    if (ctx->throttle_fence) {
        ctx->throttle_fence->base.wait(&ctx->throttle_fence->base);
        yagl_fence_release(ctx->throttle_fence);
        ctx->throttle_fence = NULL;
    } else {
        yagl_transport_wait(yagl_get_transport());
    }

    ctx->need_throttle = 0;
}

int yagl_context_mark_current(struct yagl_context *ctx, int current)
{
    int ret = 1;

    pthread_mutex_lock(&ctx->mtx);

    if ((!current ^ !ctx->current) != 0) {
        ctx->current = current;
    } else {
        ret = 0;
    }

    pthread_mutex_unlock(&ctx->mtx);

    return ret;
}

void yagl_context_acquire(struct yagl_context *ctx)
{
    if (ctx) {
        yagl_resource_acquire(&ctx->res);
    }
}

void yagl_context_release(struct yagl_context *ctx)
{
    if (ctx) {
        yagl_resource_release(&ctx->res);
    }
}

void yagl_context_finish(struct yagl_context *ctx)
{
    yagl_display_finalize_images(ctx->dpy);
}