Function Cvar_Defrag

code/qcommon/cvar.cpp:1407–1446

Turns many small allocation blocks into one big one.

//Turns many small allocation blocks into one big one.
void Cvar_Defrag(void)
{
	cvar_t	*var;
	int totalMem = 0;
	int nextMemPoolSize;

	for (var = cvar_vars; var; var = var->next)
	{
		if (var->name) {
			totalMem += strlen(var->name) + 1;
		}
		if (var->string) {
			totalMem += strlen(var->string) + 1;
		}
		if (var->resetString) {
			totalMem += strlen(var->resetString) + 1;
		}
		if (var->latchedString) {
			totalMem += strlen(var->latchedString) + 1;
		}
	}

	char *mem = (char*)Z_Malloc(totalMem, TAG_SMALL, qfalse);
	nextMemPoolSize = totalMem;
	totalMem = 0;

	for (var = cvar_vars; var; var = var->next)
	{
		Cvar_Realloc(&var->name, mem, totalMem);
		Cvar_Realloc(&var->string, mem, totalMem);
		Cvar_Realloc(&var->resetString, mem, totalMem);
		Cvar_Realloc(&var->latchedString, mem, totalMem);
	}

	if(lastMemPool) {
		Z_Free(lastMemPool);
	}
	lastMemPool = mem;
	memPoolSize = nextMemPoolSize;
}