//-----------------------------------------------------------------
void* StackMemoryManager::growObject( size_t amount )
{
size_t currentSize = getTopObjectSize();
size_t newSize = currentSize + amount;
size_t oldCurrentPos = mFrames[ mActiveFrame ].mCurrentPosition;
size_t newDataSizePos = (mFrames[ mActiveFrame ].mCurrentPosition + amount) - sizeof(newSize);
size_t newCurrentPos = newDataSizePos + sizeof(newSize);
if ( newCurrentPos > mFrames[ mActiveFrame ].mMaxMemoryBlob )
{
size_t numOfAllocs = 0;
while ( newCurrentPos > mFrames[ mActiveFrame ].mMaxMemoryBlob )
{
if (!allocateMoreMemory())
return 0;
newDataSizePos = mFrames[ mActiveFrame ].mCurrentPosition + newSize;
newCurrentPos = newDataSizePos + sizeof(newSize);
numOfAllocs++;
}
void* source = mFrames[ mActiveFrame-numOfAllocs ].mMemoryBlob + oldCurrentPos - currentSize - sizeof(currentSize);
memcpy(mFrames[ mActiveFrame ].mMemoryBlob, source, currentSize);
// delete last object in last frame
mFrames[ mActiveFrame-numOfAllocs ].mCurrentPosition -= ( currentSize + sizeof(mFrames[ mActiveFrame-numOfAllocs ].mCurrentPosition) );
}
mFrames[ mActiveFrame ].mCurrentPosition = newCurrentPos;
writeNewObjectSize(newDataSizePos, newSize);
return top();
}
//-----------------------------------------------------------------
void StackMemoryManager::growObject( size_t amount )
{
size_t currentSize = getTopObjectSize();
size_t newSize = currentSize + amount;
size_t newDataSizePos = mCurrentPosition + newSize;
mCurrentPosition = newDataSizePos + sizeof(newSize);
// TODO check if new size exceeds allocated memory !!!
writeNewObjectSize(newDataSizePos, newSize);
}
//--------------------------------------------------------------------
void* StackMemoryManager::newObject( size_t objectSize )
{
size_t newDataPos = mCurrentPosition;
size_t newDataSizePos = mCurrentPosition + objectSize;
// objectSize will be written at newDataSizePos
mCurrentPosition = newDataSizePos + sizeof(objectSize);
if (mCurrentPosition >= mMaxMemoryBlob)
{
// assert(false);
//realloc();
}
writeNewObjectSize(newDataSizePos, objectSize);
return mMemoryBlob + newDataPos;
}
//--------------------------------------------------------------------
void* StackMemoryManager::newObject( size_t objectSize )
{
size_t newDataPos = mFrames[ mActiveFrame ].mCurrentPosition;
size_t newDataSizePos = mFrames[ mActiveFrame ].mCurrentPosition + objectSize;
size_t newCurrentPos = newDataSizePos + sizeof(objectSize);
while ( newCurrentPos > mFrames[ mActiveFrame ].mMaxMemoryBlob )
{
if (!allocateMoreMemory())
return 0;
newDataPos = mFrames[ mActiveFrame ].mCurrentPosition;
newDataSizePos = mFrames[ mActiveFrame ].mCurrentPosition + objectSize;
newCurrentPos = newDataSizePos + sizeof(objectSize);
}
// objectSize will be written at newDataSizePos
mFrames[ mActiveFrame ].mCurrentPosition = newCurrentPos;
writeNewObjectSize(newDataSizePos, objectSize);
return mFrames[ mActiveFrame ].mMemoryBlob + newDataPos;
}
