cpp/openttd-patchpack/source Files · src/oldpool.cpp

Files @ r7882:cdf03a4ac84a

Branch filter:

Location: cpp/openttd-patchpack/source/src/oldpool.cpp

r7882:cdf03a4ac84a 2.4 KiB text/x-c Show Annotation Show as Raw Download as Raw

rubidium

(svn r11433) -Fix: starting OpenTTD with DOS files made it look weird out of the box.
-Change: make extra sprites (the ones not in the TTD GRFs) replaceable using Action 5.
-Feature: make replacing contiguous subsets of sprites in for some types possible in Action 5.
Note to GRF authors: when you replaced OpenTTD sprites that are not from the TTD GRF files using Action A, your GRF will not have the intended result anymore as the sprite numbers have changed. You should replace the Action A with an Action 5 from now on.

/* $Id$ */

/** @file oldpool.cpp */

#include "stdafx.h"
#include "openttd.h"
#include "debug.h"
#include "functions.h"
#include "oldpool.h"
#include "helpers.hpp"

/**
 * Clean a pool in a safe way (does free all blocks)
 */
void OldMemoryPoolBase::CleanPool()
{
	uint i;

	DEBUG(misc, 4, "[Pool] (%s) cleaning pool..", this->name);

	this->cleaning_pool = true;
	/* Free all blocks */
	for (i = 0; i < this->current_blocks; i++) {
		if (this->clean_block_proc != NULL) {
			this->clean_block_proc(i * (1 << this->block_size_bits), (i + 1) * (1 << this->block_size_bits) - 1);
		}
		free(this->blocks[i]);
	}
	this->cleaning_pool = false;

	/* Free the block itself */
	free(this->blocks);

	/* Clear up some critical data */
	this->total_items = 0;
	this->current_blocks = 0;
	this->blocks = NULL;
	this->first_free_index = 0;
}

/**
 * This function tries to increase the size of array by adding
 *  1 block too it
 *
 * @return Returns false if the pool could not be increased
 */
bool OldMemoryPoolBase::AddBlockToPool()
{
	/* Is the pool at his max? */
	if (this->max_blocks == this->current_blocks) return false;

	this->total_items = (this->current_blocks + 1) * (1 << this->block_size_bits);

	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);

	/* Increase the poolsize */
	this->blocks = ReallocT(this->blocks, this->current_blocks + 1);
	if (this->blocks == NULL) error("Pool: (%s) could not allocate memory for blocks", this->name);

	/* Allocate memory to the new block item */
	this->blocks[this->current_blocks] = MallocT<byte>(this->item_size * (1 << this->block_size_bits));
	if (this->blocks[this->current_blocks] == NULL)
		error("Pool: (%s) could not allocate memory for blocks", this->name);

	/* Clean the content of the new block */
	memset(this->blocks[this->current_blocks], 0, this->item_size * (1 << this->block_size_bits));

	/* Call a custom function if defined (e.g. to fill indexes) */
	if (this->new_block_proc != NULL) this->new_block_proc(this->current_blocks * (1 << this->block_size_bits));

	/* We have a new block */
	this->current_blocks++;

	return true;
}

/**
 * Adds blocks to the pool if needed (and possible) till index fits inside the pool
 *
 * @return Returns false if adding failed
 */
bool OldMemoryPoolBase::AddBlockIfNeeded(uint index)
{
	while (index >= this->total_items) {
		if (!this->AddBlockToPool()) return false;
	}

	return true;
}