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https://github.com/KolibriOS/kolibrios.git
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105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* \file
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* Buffer fencing.
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*
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* "Fenced buffers" is actually a misnomer. They should be referred as
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* "fenceable buffers", i.e, buffers that can be fenced, but I couldn't find
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* the word "fenceable" in the dictionary.
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*
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* A "fenced buffer" is a decorator around a normal buffer, which adds two
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* special properties:
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* - the ability for the destruction to be delayed by a fence;
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* - reference counting.
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*
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* Usually DMA buffers have a life-time that will extend the life-time of its
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* handle. The end-of-life is dictated by the fence signalling.
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*
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* Between the handle's destruction, and the fence signalling, the buffer is
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* stored in a fenced buffer list.
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*
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* \author Jose Fonseca <jrfonseca@tungstengraphics.com>
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*/
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#ifndef PB_BUFFER_FENCED_H_
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#define PB_BUFFER_FENCED_H_
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#include "util/u_debug.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct pipe_fence_handle;
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/**
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* List of buffers which are awaiting fence signalling.
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*/
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struct fenced_buffer_list;
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struct pb_fence_ops
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{
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void (*destroy)( struct pb_fence_ops *ops );
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/** Set ptr = fence, with reference counting */
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void (*fence_reference)( struct pb_fence_ops *ops,
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struct pipe_fence_handle **ptr,
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struct pipe_fence_handle *fence );
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/**
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* Checks whether the fence has been signalled.
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* \param flags driver-specific meaning
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* \return zero on success.
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*/
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int (*fence_signalled)( struct pb_fence_ops *ops,
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struct pipe_fence_handle *fence,
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unsigned flag );
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/**
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* Wait for the fence to finish.
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* \param flags driver-specific meaning
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* \return zero on success.
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*/
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int (*fence_finish)( struct pb_fence_ops *ops,
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struct pipe_fence_handle *fence,
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unsigned flag );
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /*PB_BUFFER_FENCED_H_*/
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