# oldpool.cpp

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    00001 /* $Id: oldpool.cpp 11692 2007-12-25 11:26:07Z rubidium $ */
    00002
    00005 #include "stdafx.h"
    00006 #include "openttd.h"
    00007 #include "debug.h"
    00008 #include "oldpool.h"
    00009 #include "core/alloc_func.hpp"
    00010
    00014 void OldMemoryPoolBase::CleanPool()
    00015 {
    00016   uint i;
    00017
    00018   DEBUG(misc, 4, "[Pool] (%s) cleaning pool..", this->name);
    00019
    00020   this->cleaning_pool = true;
    00021   /* Free all blocks */
    00022   for (i = 0; i < this->current_blocks; i++) {
    00023     if (this->clean_block_proc != NULL) {
    00024       this->clean_block_proc(i * (1 << this->block_size_bits), (i + 1) * (1 << this->block_size_bits) - 1);
    00025     }
    00026     free(this->blocks[i]);
    00027   }
    00028   this->cleaning_pool = false;
    00029
    00030   /* Free the block itself */
    00031   free(this->blocks);
    00032
    00033   /* Clear up some critical data */
    00034   this->total_items = 0;
    00035   this->current_blocks = 0;
    00036   this->blocks = NULL;
    00037   this->first_free_index = 0;
    00038 }
    00039
    00046 bool OldMemoryPoolBase::AddBlockToPool()
    00047 {
    00048   /* Is the pool at his max? */
    00049   if (this->max_blocks == this->current_blocks) return false;
    00050
    00051   this->total_items = (this->current_blocks + 1) * (1 << this->block_size_bits);
    00052
    00053   DEBUG(misc, 4, "[Pool] (%s) increasing size of pool to %d items (%d bytes)", this->name, this->total_items, this->total_items * this->item_size);
    00054
    00055   /* Increase the poolsize */
    00056   this->blocks = ReallocT(this->blocks, this->current_blocks + 1);
    00057
    00058   /* Allocate memory to the new block item */
    00059   this->blocks[this->current_blocks] = MallocT<byte>(this->item_size * (1 << this->block_size_bits));
    00060
    00061   /* Clean the content of the new block */
    00062   memset(this->blocks[this->current_blocks], 0, this->item_size * (1 << this->block_size_bits));
    00063
    00064   /* Call a custom function if defined (e.g. to fill indexes) */
    00065   if (this->new_block_proc != NULL) this->new_block_proc(this->current_blocks * (1 << this->block_size_bits));
    00066
    00067   /* We have a new block */
    00068   this->current_blocks++;
    00069
    00070   return true;
    00071 }
    00072
    00078 bool OldMemoryPoolBase::AddBlockIfNeeded(uint index)
    00079 {
    00080   while (index >= this->total_items) {
    00081     if (!this->AddBlockToPool()) return false;
    00082   }
    00083
    00084   return true;
    00085 }