199 lines
4.4 KiB
C
199 lines
4.4 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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* Implementation of malloc-based buffers to store data that can't be processed
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* by the hardware.
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*
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* \author Jose Fonseca <jrfonseca@tungstengraphics.com>
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*/
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#include "util/u_debug.h"
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#include "util/u_memory.h"
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#include "pb_buffer.h"
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#include "pb_bufmgr.h"
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struct malloc_buffer
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{
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struct pb_buffer base;
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void *data;
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};
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extern const struct pb_vtbl malloc_buffer_vtbl;
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static INLINE struct malloc_buffer *
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malloc_buffer(struct pb_buffer *buf)
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{
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assert(buf);
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if (!buf)
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return NULL;
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assert(buf->vtbl == &malloc_buffer_vtbl);
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return (struct malloc_buffer *)buf;
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}
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static void
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malloc_buffer_destroy(struct pb_buffer *buf)
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{
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align_free(malloc_buffer(buf)->data);
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FREE(buf);
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}
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static void *
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malloc_buffer_map(struct pb_buffer *buf,
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unsigned flags,
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void *flush_ctx)
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{
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return malloc_buffer(buf)->data;
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}
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static void
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malloc_buffer_unmap(struct pb_buffer *buf)
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{
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/* No-op */
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}
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static enum pipe_error
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malloc_buffer_validate(struct pb_buffer *buf,
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struct pb_validate *vl,
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unsigned flags)
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{
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assert(0);
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return PIPE_ERROR;
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}
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static void
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malloc_buffer_fence(struct pb_buffer *buf,
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struct pipe_fence_handle *fence)
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{
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assert(0);
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}
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static void
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malloc_buffer_get_base_buffer(struct pb_buffer *buf,
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struct pb_buffer **base_buf,
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pb_size *offset)
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{
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*base_buf = buf;
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*offset = 0;
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}
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const struct pb_vtbl
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malloc_buffer_vtbl = {
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malloc_buffer_destroy,
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malloc_buffer_map,
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malloc_buffer_unmap,
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malloc_buffer_validate,
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malloc_buffer_fence,
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malloc_buffer_get_base_buffer
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};
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struct pb_buffer *
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pb_malloc_buffer_create(pb_size size,
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const struct pb_desc *desc)
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{
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struct malloc_buffer *buf;
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/* TODO: do a single allocation */
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buf = CALLOC_STRUCT(malloc_buffer);
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if(!buf)
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return NULL;
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pipe_reference_init(&buf->base.reference, 1);
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buf->base.usage = desc->usage;
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buf->base.size = size;
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buf->base.alignment = desc->alignment;
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buf->base.vtbl = &malloc_buffer_vtbl;
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buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment);
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if(!buf->data) {
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FREE(buf);
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return NULL;
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}
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return &buf->base;
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}
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static struct pb_buffer *
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pb_malloc_bufmgr_create_buffer(struct pb_manager *mgr,
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pb_size size,
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const struct pb_desc *desc)
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{
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return pb_malloc_buffer_create(size, desc);
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}
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static void
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pb_malloc_bufmgr_flush(struct pb_manager *mgr)
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{
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/* No-op */
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}
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static void
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pb_malloc_bufmgr_destroy(struct pb_manager *mgr)
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{
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/* No-op */
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}
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static boolean
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pb_malloc_bufmgr_is_buffer_busy( struct pb_manager *mgr,
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struct pb_buffer *buf )
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{
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return FALSE;
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}
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static struct pb_manager
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pb_malloc_bufmgr = {
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pb_malloc_bufmgr_destroy,
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pb_malloc_bufmgr_create_buffer,
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pb_malloc_bufmgr_flush,
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pb_malloc_bufmgr_is_buffer_busy
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};
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struct pb_manager *
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pb_malloc_bufmgr_create(void)
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{
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return &pb_malloc_bufmgr;
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}
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