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/**************************************************************************
*
* Copyright 2011 Marek Olšák <maraeo@gmail.com>
* 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 AUTHORS 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.
*
**************************************************************************/
/*
* Authors:
* Marek Olšák <maraeo@gmail.com>
*/
#include "main/glheader.h"
#include "main/macros.h"
#include "pipe/p_context.h"
#include "pipe/p_screen.h"
#include "st_context.h"
#include "st_cb_syncobj.h"
struct st_sync_object {
struct gl_sync_object b;
struct pipe_fence_handle *fence;
mtx_t mutex; /**< protects "fence" */
};
static struct gl_sync_object * st_new_sync_object(struct gl_context *ctx,
GLenum type)
{
if (type == GL_SYNC_FENCE) {
struct st_sync_object *so = CALLOC_STRUCT(st_sync_object);
mtx_init(&so->mutex, mtx_plain);
return &so->b;
} else {
return NULL;
}
}
static void st_delete_sync_object(struct gl_context *ctx,
struct gl_sync_object *obj)
{
struct pipe_screen *screen = st_context(ctx)->pipe->screen;
struct st_sync_object *so = (struct st_sync_object*)obj;
screen->fence_reference(screen, &so->fence, NULL);
mtx_destroy(&so->mutex);
free(so->b.Label);
free(so);
}
static void st_fence_sync(struct gl_context *ctx, struct gl_sync_object *obj,
GLenum condition, GLbitfield flags)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_sync_object *so = (struct st_sync_object*)obj;
assert(condition == GL_SYNC_GPU_COMMANDS_COMPLETE && flags == 0);
assert(so->fence == NULL);
pipe->flush(pipe, &so->fence, PIPE_FLUSH_DEFERRED);
}
static void st_client_wait_sync(struct gl_context *ctx,
struct gl_sync_object *obj,
GLbitfield flags, GLuint64 timeout)
{
struct pipe_context *pipe = st_context(ctx)->pipe;
struct pipe_screen *screen = pipe->screen;
struct st_sync_object *so = (struct st_sync_object*)obj;
struct pipe_fence_handle *fence = NULL;
/* If the fence doesn't exist, assume it's signalled. */
mtx_lock(&so->mutex);
if (!so->fence) {
mtx_unlock(&so->mutex);
so->b.StatusFlag = GL_TRUE;
return;
}
/* We need a local copy of the fence pointer, so that we can call
* fence_finish unlocked.
*/
screen->fence_reference(screen, &fence, so->fence);
mtx_unlock(&so->mutex);
/* Section 4.1.2 of OpenGL 4.5 (Compatibility Profile) says:
* [...] if ClientWaitSync is called and all of the following are true:
* - the SYNC_FLUSH_COMMANDS_BIT bit is set in flags,
* - sync is unsignaled when ClientWaitSync is called,
* - and the calls to ClientWaitSync and FenceSync were issued from
* the same context,
* then the GL will behave as if the equivalent of Flush were inserted
* immediately after the creation of sync.
*
* Assume GL_SYNC_FLUSH_COMMANDS_BIT is always set, because applications
* forget to set it.
*/
if (screen->fence_finish(screen, pipe, fence, timeout)) {
mtx_lock(&so->mutex);
screen->fence_reference(screen, &so->fence, NULL);
mtx_unlock(&so->mutex);
so->b.StatusFlag = GL_TRUE;
}
screen->fence_reference(screen, &fence, NULL);
}
static void st_check_sync(struct gl_context *ctx, struct gl_sync_object *obj)
{
st_client_wait_sync(ctx, obj, 0, 0);
}
static void st_server_wait_sync(struct gl_context *ctx,
struct gl_sync_object *obj,
GLbitfield flags, GLuint64 timeout)
{
/* NO-OP.
* Neither Gallium nor DRM interfaces support blocking on the GPU. */
}
void st_init_syncobj_functions(struct dd_function_table *functions)
{
functions->NewSyncObject = st_new_sync_object;
functions->FenceSync = st_fence_sync;
functions->DeleteSyncObject = st_delete_sync_object;
functions->CheckSync = st_check_sync;
functions->ClientWaitSync = st_client_wait_sync;
functions->ServerWaitSync = st_server_wait_sync;
}
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