mirror of https://gitlab.freedesktop.org/mesa/mesa
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright 2009 VMware, Inc.
|
|
* 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, sub license, 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 (including the
|
|
* next paragraph) 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 NON-INFRINGEMENT.
|
|
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
|
|
*
|
|
**************************************************************************/
|
|
|
|
|
|
/**
|
|
* Scene queue. We'll use two queues. One contains "full" scenes which
|
|
* are produced by the "setup" code. The other contains "empty" scenes
|
|
* which are produced by the "rast" code when it finishes rendering a scene.
|
|
*/
|
|
|
|
#include "util/u_ringbuffer.h"
|
|
#include "util/u_memory.h"
|
|
#include "lp_scene_queue.h"
|
|
|
|
|
|
|
|
#define MAX_SCENE_QUEUE 4
|
|
|
|
struct scene_packet {
|
|
struct util_packet header;
|
|
struct lp_scene *scene;
|
|
};
|
|
|
|
/**
|
|
* A queue of scenes
|
|
*/
|
|
struct lp_scene_queue
|
|
{
|
|
struct util_ringbuffer *ring;
|
|
};
|
|
|
|
|
|
|
|
/** Allocate a new scene queue */
|
|
struct lp_scene_queue *
|
|
lp_scene_queue_create(void)
|
|
{
|
|
struct lp_scene_queue *queue = CALLOC_STRUCT(lp_scene_queue);
|
|
if (!queue)
|
|
return NULL;
|
|
|
|
queue->ring = util_ringbuffer_create( MAX_SCENE_QUEUE *
|
|
sizeof( struct scene_packet ) / 4);
|
|
if (queue->ring == NULL)
|
|
goto fail;
|
|
|
|
return queue;
|
|
|
|
fail:
|
|
FREE(queue);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/** Delete a scene queue */
|
|
void
|
|
lp_scene_queue_destroy(struct lp_scene_queue *queue)
|
|
{
|
|
util_ringbuffer_destroy(queue->ring);
|
|
FREE(queue);
|
|
}
|
|
|
|
|
|
/** Remove first lp_scene from head of queue */
|
|
struct lp_scene *
|
|
lp_scene_dequeue(struct lp_scene_queue *queue, boolean wait)
|
|
{
|
|
struct scene_packet packet;
|
|
enum pipe_error ret;
|
|
|
|
packet.scene = NULL;
|
|
|
|
ret = util_ringbuffer_dequeue(queue->ring,
|
|
&packet.header,
|
|
sizeof packet / 4,
|
|
wait );
|
|
if (ret != PIPE_OK)
|
|
return NULL;
|
|
|
|
return packet.scene;
|
|
}
|
|
|
|
|
|
/** Add an lp_scene to tail of queue */
|
|
void
|
|
lp_scene_enqueue(struct lp_scene_queue *queue, struct lp_scene *scene)
|
|
{
|
|
struct scene_packet packet;
|
|
|
|
packet.header.dwords = sizeof packet / 4;
|
|
packet.header.data24 = 0;
|
|
packet.scene = scene;
|
|
|
|
util_ringbuffer_enqueue(queue->ring, &packet.header);
|
|
}
|
|
|
|
|
|
|
|
|
|
|