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/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD 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 General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file pool_func.hpp Some methods of Pool are placed here in order to reduce compilation time and binary size. */
#ifndef POOL_FUNC_HPP
#define POOL_FUNC_HPP
#include "alloc_func.hpp"
#include "mem_func.hpp"
#include "pool_type.hpp"
#define DEFINE_POOL_METHOD(type) \
template <class Titem, typename Tindex, size_t Tgrowth_step, size_t Tmax_size> \
type Pool<Titem, Tindex, Tgrowth_step, Tmax_size>
DEFINE_POOL_METHOD(inline)::Pool(const char *name) :
name(name),
size(0),
first_free(0),
first_unused(0),
items(0),
cleaning(false),
data(NULL)
{ }
DEFINE_POOL_METHOD(inline void)::ResizeFor(size_t index)
{
assert(index >= this->size);
assert(index < Tmax_size);
size_t new_size = min(Tmax_size, Align(index + 1, Tgrowth_step));
this->data = ReallocT(this->data, new_size);
MemSetT(this->data + this->size, 0, new_size - this->size);
this->size = new_size;
}
DEFINE_POOL_METHOD(inline size_t)::FindFirstFree()
{
size_t index = this->first_free;
for (; index < this->first_unused; index++) {
if (this->data[index] == NULL) return index;
}
if (index < this->size) {
return index;
}
assert(index == this->size);
assert(this->first_unused == this->size);
if (index < Tmax_size) {
this->ResizeFor(index);
return index;
}
assert(this->items == Tmax_size);
return NO_FREE_ITEM;
}
DEFINE_POOL_METHOD(inline void *)::AllocateItem(size_t size, size_t index)
{
assert(this->data[index] == NULL);
this->first_unused = max(this->first_unused, index + 1);
this->items++;
Titem *item = this->data[index] = (Titem *)CallocT<byte>(size);
item->index = (uint)index;
return item;
}
DEFINE_POOL_METHOD(void *)::GetNew(size_t size)
{
size_t index = this->FindFirstFree();
if (index == NO_FREE_ITEM) {
error("%s: no more free items", this->name);
}
this->first_free = index + 1;
return this->AllocateItem(size, index);
}
DEFINE_POOL_METHOD(void *)::GetNew(size_t size, size_t index)
{
if (index >= Tmax_size) {
usererror("failed loading savegame: %s index " PRINTF_SIZE " out of range (" PRINTF_SIZE ")", this->name, index, Tmax_size);
}
if (index >= this->size) this->ResizeFor(index);
if (this->data[index] != NULL) {
usererror("failed loading savegame: %s index " PRINTF_SIZE " already in use", this->name, index);
}
return this->AllocateItem(size, index);
}
DEFINE_POOL_METHOD(void)::FreeItem(size_t index)
{
assert(index < this->size);
assert(this->data[index] != NULL);
free(this->data[index]);
this->data[index] = NULL;
this->first_free = min(this->first_free, index);
this->items--;
if (!this->cleaning) Titem::PostDestructor(index);
}
DEFINE_POOL_METHOD(void)::CleanPool()
{
this->cleaning = true;
for (size_t i = 0; i < this->first_unused; i++) {
delete this->Get(i); // 'delete NULL;' is very valid
}
assert(this->items == 0);
free(this->data);
this->first_unused = this->first_free = this->size = 0;
this->data = NULL;
this->cleaning = false;
}
#undef DEFINE_POOL_METHOD
/**
* Force instantiation of pool methods so we don't get linker errors.
* Only methods accessed from methods defined in pool.hpp need to be
* forcefully instantiated.
*/
#define INSTANTIATE_POOL_METHODS(name) \
template void * name ## Pool::GetNew(size_t size); \
template void * name ## Pool::GetNew(size_t size, size_t index); \
template void name ## Pool::FreeItem(size_t index); \
template void name ## Pool::CleanPool();
#endif /* POOL_FUNC_HPP */
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