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3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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32 * "Fenced buffers" is actually a misnomer. They should be referred as
33 * "fenceable buffers", i.e, buffers that can be fenced, but I couldn't find
34 * the word "fenceable" in the dictionary.
36 * A "fenced buffer" is a decorator around a normal buffer, which adds two
38 * - the ability for the destruction to be delayed by a fence;
39 * - reference counting.
41 * Usually DMA buffers have a life-time that will extend the life-time of its
42 * handle. The end-of-life is dictated by the fence signalling.
44 * Between the handle's destruction, and the fence signalling, the buffer is
45 * stored in a fenced buffer list.
47 * \author Jose Fonseca <jrfonseca@tungstengraphics.com>
50 #ifndef PB_BUFFER_FENCED_H_
51 #define PB_BUFFER_FENCED_H_
54 #include "util/u_debug.h"
62 struct pipe_fence_handle;
66 * List of buffers which are awaiting fence signalling.
68 struct fenced_buffer_list;
73 void (*destroy)( struct pb_fence_ops *ops );
75 /** Set ptr = fence, with reference counting */
76 void (*fence_reference)( struct pb_fence_ops *ops,
77 struct pipe_fence_handle **ptr,
78 struct pipe_fence_handle *fence );
81 * Checks whether the fence has been signalled.
82 * \param flags driver-specific meaning
83 * \return zero on success.
85 int (*fence_signalled)( struct pb_fence_ops *ops,
86 struct pipe_fence_handle *fence,
90 * Wait for the fence to finish.
91 * \param flags driver-specific meaning
92 * \return zero on success.
94 int (*fence_finish)( struct pb_fence_ops *ops,
95 struct pipe_fence_handle *fence,
104 #endif /*PB_BUFFER_FENCED_H_*/