forked from KolibriOS/kolibrios
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
|
|
* 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 TUNGSTEN GRAPHICS 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.
|
|
*
|
|
**************************************************************************/
|
|
|
|
/**
|
|
* \file
|
|
* Buffer fencing.
|
|
*
|
|
* "Fenced buffers" is actually a misnomer. They should be referred as
|
|
* "fenceable buffers", i.e, buffers that can be fenced, but I couldn't find
|
|
* the word "fenceable" in the dictionary.
|
|
*
|
|
* A "fenced buffer" is a decorator around a normal buffer, which adds two
|
|
* special properties:
|
|
* - the ability for the destruction to be delayed by a fence;
|
|
* - reference counting.
|
|
*
|
|
* Usually DMA buffers have a life-time that will extend the life-time of its
|
|
* handle. The end-of-life is dictated by the fence signalling.
|
|
*
|
|
* Between the handle's destruction, and the fence signalling, the buffer is
|
|
* stored in a fenced buffer list.
|
|
*
|
|
* \author Jose Fonseca <jrfonseca@tungstengraphics.com>
|
|
*/
|
|
|
|
#ifndef PB_BUFFER_FENCED_H_
|
|
#define PB_BUFFER_FENCED_H_
|
|
|
|
|
|
#include "util/u_debug.h"
|
|
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
struct pipe_fence_handle;
|
|
|
|
|
|
/**
|
|
* List of buffers which are awaiting fence signalling.
|
|
*/
|
|
struct fenced_buffer_list;
|
|
|
|
|
|
struct pb_fence_ops
|
|
{
|
|
void (*destroy)( struct pb_fence_ops *ops );
|
|
|
|
/** Set ptr = fence, with reference counting */
|
|
void (*fence_reference)( struct pb_fence_ops *ops,
|
|
struct pipe_fence_handle **ptr,
|
|
struct pipe_fence_handle *fence );
|
|
|
|
/**
|
|
* Checks whether the fence has been signalled.
|
|
* \param flags driver-specific meaning
|
|
* \return zero on success.
|
|
*/
|
|
int (*fence_signalled)( struct pb_fence_ops *ops,
|
|
struct pipe_fence_handle *fence,
|
|
unsigned flag );
|
|
|
|
/**
|
|
* Wait for the fence to finish.
|
|
* \param flags driver-specific meaning
|
|
* \return zero on success.
|
|
*/
|
|
int (*fence_finish)( struct pb_fence_ops *ops,
|
|
struct pipe_fence_handle *fence,
|
|
unsigned flag );
|
|
};
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /*PB_BUFFER_FENCED_H_*/
|