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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "watchmaker/3d/mem_management.h"
#include "watchmaker/types.h"
#include "watchmaker/ll/ll_system.h"
namespace Watchmaker {
static int8 *MemoryPool = nullptr;
static uint32 MemoryPoolPointer = 0;
static uint32 MaxAllocatedMem = 0;
// Memory Managment
// Only linear (non dynamic) stack allocations
/* -----------------10/06/99 16.06-------------------
* t3dAllocMemoryPool
* --------------------------------------------------*/
uint8 t3dAllocMemoryPool(uint32 pool) {
uint8 allocated = 0;
MemoryPoolPointer = 0;
while ((allocated == 0) && (pool > 0)) {
if (!(MemoryPool = t3dCalloc<int8>(pool)))
pool -= 10000;
else
allocated = 1;
}
if (allocated == 0)
return 0;
else {
MaxAllocatedMem = pool;
return 1;
}
}
/* -----------------10/06/99 16.07-------------------
* t3dDeallocMemoryPool
* --------------------------------------------------*/
void t3dDeallocMemoryPool() {
if (MemoryPool == nullptr) return;
t3dFree(MemoryPool);
MemoryPool = nullptr;
MaxAllocatedMem = 0;
}
/* -----------------10/06/99 16.07-------------------
* t3dAlloc
* --------------------------------------------------*/
void *t3dAlloc(uint32 size) {
if (MemoryPool == nullptr) return nullptr;
MemoryPoolPointer += size;
if (MemoryPoolPointer > MaxAllocatedMem) {
return nullptr;
}
return &MemoryPool[MemoryPoolPointer - size];
}
/* -----------------10/06/99 16.07-------------------
* t3dDealloc
* --------------------------------------------------*/
void *t3dDealloc(uint32 size) {
if (MemoryPool == nullptr) return nullptr;
MemoryPoolPointer -= size;
return &MemoryPool[MemoryPoolPointer];
}
} // End of namespace Watchmaker
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