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/*************************************************************************
* Copyright (C) 2014 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Memory pools. Rather than more complicated garbage collection methods like
* reference counting, objects are allocated out of pools which are freed all at
* once once a scene is rendered (for example).
*/
#include <stddef.h> // For size_t
// Forward-declare dmnsn_pool.
typedef struct dmnsn_pool dmnsn_pool;
/**
* Create a new memory pool.
* @return The new pool.
*/
dmnsn_pool *dmnsn_new_pool(void);
/**
* Allocate some memory from a pool.
* @param[in] pool The memory pool to allocate from.
* @param[in] size The size of the memory block to allocate.
* @return The allocated memory area.
*/
void *dmnsn_palloc(dmnsn_pool *pool, size_t size);
/**
* Allocate some memory from a pool.
* @param[in] pool The memory pool to allocate from.
* @param[in] size The size of the memory block to allocate.
* @param[in] cleanup_fn A callback to invoke before the memory is freed.
* @return The allocated memory area.
*/
void *dmnsn_palloc_tidy(dmnsn_pool *pool, size_t size, dmnsn_callback_fn *cleanup_fn);
/**
* Allocate some memory from a pool.
* @param[in] pool The memory pool to allocate from.
* @param[in] type The type of the memory block to allocate.
* @return The allocated memory area.
*/
#define DMNSN_PALLOC(pool, type) ((type *)dmnsn_palloc((pool), sizeof(type)))
/**
* Allocate some memory from a pool.
* @param[in] pool The memory pool to allocate from.
* @param[in] type The type of the memory block to allocate.
* @param[in] cleanup_fn A callback to invoke before the memory is freed.
* @return The allocated memory area.
*/
#define DMNSN_PALLOC_TIDY(pool, type, cleanup_fn) ((type *)dmnsn_palloc_tidy((pool), sizeof(type), (cleanup_fn)))
/**
* Free a memory pool and all associated allocations.
* @param[in] pool The memory pool to free.
*/
void dmnsn_delete_pool(dmnsn_pool *pool);
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