/*
 * Copyright (c) 2008-2009 Bill Whitacre http://rampancy.g0dsoft.com
 * 
 * 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, sublicense, 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 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 NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS 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.
*/

#ifndef RAT_PHYSICS_MEMORY
#define RAT_PHYSICS_MEMORY

#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

// main alloc/dealloc functions, just calls dlmalloc|malloc/dlfree|free

void rat_set_alloc_fn(void *(*alloc_fn)(size_t));
void rat_set_realloc_fn(void *(*realloc_fn)(void *,size_t));
void rat_set_dealloc_fn(void (*dealloc_fn)(void *));

void *rat_alloc(size_t size);
void *rat_realloc(void *mem,size_t newsize);
void rat_dealloc(void *mem);

unsigned int rat_blocks_alloced();
unsigned int rat_mem_alloced();

void rat_mem_alloced_string(char *str);


// a simple stack allocator
// must push/pop memory allocations; faster than
// arbitrary malloc/free by a int shot.

struct rat_stack_allocator;
typedef struct rat_stack_allocator rat_stack_allocator;

extern const size_t rat_max_stack_cells;
extern const size_t rat_stack_size;

rat_stack_allocator *rat_stack_allocator_create();
void rat_stack_allocator_destroy(rat_stack_allocator *sal);

void *rat_stack_alloc(rat_stack_allocator *sal,size_t size);
void rat_stack_dealloc(rat_stack_allocator *sal,void *mem);

unsigned int rat_stack_most_alloced(rat_stack_allocator *sal);


// a simple small block allocator for objects of about
// the same size being alloced/dealloced on a regular
// basis.  it is very fast at recycling

struct rat_block_allocator;
typedef struct rat_block_allocator rat_block_allocator;

extern const unsigned int rat_chunk_size;
extern const unsigned int rat_max_block_size;
extern const unsigned int rat_block_sizes;
extern const unsigned int rat_chunk_arr_inc;

rat_block_allocator *rat_block_allocator_create();
void rat_block_allocator_destroy(rat_block_allocator *bal);
void rat_block_allocator_clear(rat_block_allocator *bal);

void *rat_block_alloc(rat_block_allocator *bal,size_t size);
void *rat_block_realloc(rat_block_allocator *bal,void *mem,size_t oldsize,size_t size);
void rat_block_dealloc(rat_block_allocator *bal,void *mem,size_t size);

unsigned int rat_block_allocator_blocks_alloced(rat_block_allocator *bal);

#ifdef __cplusplus
}
#endif

#endif