Function m_allocator

DevIL/test/Stress/mmgr.cpp:1038–1211

// ---------------------------------------------------------------------------------------------------------------------------------

void	*m_allocator(const char *sourceFile, const unsigned int sourceLine, const char *sourceFunc, const unsigned int allocationType, const size_t reportedSize)
{
	try
	{
		#ifdef TEST_MEMORY_MANAGER
		log("[D] ENTER: m_allocator()");
		#endif

		// Increase our allocation count

		currentAllocationCount++;

		// Log the request

		if (alwaysLogAll) log("[+] %05d %8s of size 0x%08X(%08d) by %s", currentAllocationCount, allocationTypes[allocationType], reportedSize, reportedSize, ownerString(sourceFile, sourceLine, sourceFunc));

		// If you hit this assert, you requested a breakpoint on a specific allocation count
		m_assert(currentAllocationCount != breakOnAllocationCount);

		// If necessary, grow the reservoir of unused allocation units

		if (!reservoir)
		{
			// Allocate 256 reservoir elements

			reservoir = (sAllocUnit *) malloc(sizeof(sAllocUnit) * 256);

			// If you hit this assert, then the memory manager failed to allocate internal memory for tracking the
			// allocations
			m_assert(reservoir != NULL);

			// Danger Will Robinson!

			if (reservoir == NULL) throw "Unable to allocate RAM for internal memory tracking data";

			// Build a linked-list of the elements in our reservoir

			memset(reservoir, 0, sizeof(sAllocUnit) * 256);
			for (unsigned int i = 0; i < 256 - 1; i++)
			{
				reservoir[i].next = &reservoir[i+1];
			}

			// Add this address to our reservoirBuffer so we can free it later

			sAllocUnit	**temp = (sAllocUnit **) realloc(reservoirBuffer, (reservoirBufferSize + 1) * sizeof(sAllocUnit *));
			m_assert(temp);
			if (temp)
			{
				reservoirBuffer = temp;
				reservoirBuffer[reservoirBufferSize++] = reservoir;
			}
		}

		// Logical flow says this should never happen...
		m_assert(reservoir != NULL);

		// Grab a new allocaton unit from the front of the reservoir