void MemoryBlockAllocator::FreeMemory(void* pAddress)
{
if (!pAddress)
{
MessagedAssert(pAddress != NULL, "You cannot free empty memory.");
TDEBUG_PRINT_FL("Hey, don't free the empty address.\n", Debugger::VerbosityDebugger::LEVEL1);
return;
}
if (!this->Contains(pAddress))
{
MessagedAssert(this->Contains(pAddress), "The address is not contained by this allocator.");
TDEBUG_PRINT_FL("Hey, this memory is not owned by me.\n", Debugger::VerbosityDebugger::LEVEL1);
return;
}
//get the memory block which contains the pAddress.
size_t memoryOffset = (size_t)pAddress - (size_t)this->_pMemoryAddress;
size_t startBit = memoryOffset / this->_blockSize;// index of the memory block
size_t align_offset = align_get_boundry_offset(sizeof(MemoryBlock), _alignment);
MemoryBlock* pBlock = reinterpret_cast<MemoryBlock*>(reinterpret_cast<char*>(_pBlocks) + startBit * align_offset);
//read how much of blocks we alloced
size_t numOfSequence = pBlock->GetNumOfAllocBlocks();
if (numOfSequence != UINT_MAX)
{
//clear the bitfield
this->_pBitfield->EraseBits(startBit, numOfSequence);
//free the memory blocks, just set memory 0
for (unsigned int i = 0; i < numOfSequence; i++)
{
pBlock->FreeBlock();
pBlock = align_get_next<MemoryBlock>(pBlock, _alignment);
}
TDEBUG_PRINT_FL("%d bytes = %d blocks of memory has been freed\n", Debugger::VerbosityDebugger::LEVEL1, numOfSequence*_blockSize, numOfSequence);
}
else
{
MessagedAssert(numOfSequence != UINT_MAX, "Memory free failed!");
TDEBUG_PRINT_FL("Free failed!\n", Debugger::VerbosityDebugger::LEVEL1);
}
}
