88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/* $Id$ */
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#include "stdafx.h"
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#include "openttd.h"
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#include "debug.h"
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#include "functions.h"
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#include "pool.h"
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/**
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* Clean a pool in a safe way (does free all blocks)
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*/
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void CleanPool(MemoryPool *pool)
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{
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uint i;
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DEBUG(misc, 4)("[Pool] (%s) Cleaning pool..", pool->name);
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/* Free all blocks */
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for (i = 0; i < pool->current_blocks; i++) {
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if (pool->clean_block_proc != NULL) {
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pool->clean_block_proc(i * (1 << pool->block_size_bits), (i + 1) * (1 << pool->block_size_bits) - 1);
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}
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free(pool->blocks[i]);
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}
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/* Free the block itself */
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free(pool->blocks);
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/* Clear up some critical data */
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pool->total_items = 0;
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pool->current_blocks = 0;
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pool->blocks = NULL;
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}
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/**
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* This function tries to increase the size of array by adding
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* 1 block too it
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*
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* @return Returns false if the pool could not be increased
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*/
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bool AddBlockToPool(MemoryPool *pool)
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{
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/* Is the pool at his max? */
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if (pool->max_blocks == pool->current_blocks)
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return false;
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pool->total_items = (pool->current_blocks + 1) * (1 << pool->block_size_bits);
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DEBUG(misc, 4)("[Pool] (%s) Increasing size of pool to %d items (%d bytes)", pool->name, pool->total_items, pool->total_items * pool->item_size);
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/* Increase the poolsize */
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pool->blocks = realloc(pool->blocks, sizeof(pool->blocks[0]) * (pool->current_blocks + 1));
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if (pool->blocks == NULL)
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error("Pool: (%s) could not allocate memory for blocks", pool->name);
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/* Allocate memory to the new block item */
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pool->blocks[pool->current_blocks] = malloc(pool->item_size * (1 << pool->block_size_bits));
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if (pool->blocks[pool->current_blocks] == NULL)
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error("Pool: (%s) could not allocate memory for blocks", pool->name);
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/* Clean the content of the new block */
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memset(pool->blocks[pool->current_blocks], 0, pool->item_size * (1 << pool->block_size_bits));
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/* Call a custom function if defined (e.g. to fill indexes) */
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if (pool->new_block_proc != NULL)
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pool->new_block_proc(pool->current_blocks * (1 << pool->block_size_bits));
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/* We have a new block */
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pool->current_blocks++;
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return true;
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}
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/**
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* Adds blocks to the pool if needed (and possible) till index fits inside the pool
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*
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* @return Returns false if adding failed
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*/
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bool AddBlockIfNeeded(MemoryPool *pool, uint index)
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{
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while (index >= pool->total_items) {
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if (!AddBlockToPool(pool))
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return false;
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}
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return true;
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}
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