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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* Copyright 2012 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 THE 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.
*
**************************************************************************/
/* A simple allocator that suballocates memory from a large buffer. */
#ifndef U_SUBALLOC
#define U_SUBALLOC
#ifdef __cplusplus
extern "C" {
#endif
struct pipe_context;
struct u_suballocator {
struct pipe_context *pipe;
unsigned size; /* Size of the whole buffer, in bytes. */
unsigned bind; /* Bitmask of PIPE_BIND_* flags. */
enum pipe_resource_usage usage;
unsigned flags; /* bitmask of PIPE_RESOURCE_FLAG_x */
boolean zero_buffer_memory; /* If the buffer contents should be zeroed. */
struct pipe_resource *buffer; /* The buffer we suballocate from. */
unsigned offset; /* Aligned offset pointing at the first unused byte. */
};
void
u_suballocator_init(struct u_suballocator *allocator,
struct pipe_context *pipe,
unsigned size, unsigned bind,
enum pipe_resource_usage usage, unsigned flags,
boolean zero_buffer_memory);
void
u_suballocator_destroy(struct u_suballocator *allocator);
void
u_suballocator_alloc(struct u_suballocator *allocator, unsigned size,
unsigned alignment, unsigned *out_offset,
struct pipe_resource **outbuf);
#ifdef __cplusplus
}
#endif
#endif
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