// Ryan way:
ThreadLocalStorage Arena* scratchPool[MAX_SCRATCH_COUNT];

ArenaTemp GetScratch(Arena **conflicts, U64 conflict_count)
{
    Arena* freeArena = 0;
    // Loop through the scratch pool and find an arena that doesn't conflict with the conflicts array
    return ArenaTempBegin(freeArena);
}
#define ReleaseScratch(t) ArenaTempEnd(t)

// My way:
ThreadLocalStorage Arena* scratchPool[MAX_SCRATCH_COUNT];
ThreadLocalStorage int currentFreeScratch; // Introducing a new thread-local integer

ArenaTemp GetScratch(void)
{
    Arena* freeArena = 0
    if (currentFreeScratch < MAX_SCRATCH_COUNT)
        freeArena = scratchPool[currentFreeScratch++];
    return ArenaTempBegin(freeArena);
}
#define ReleaseScratch(t) do { ArenaTempEnd(t); currentFreeScratch--; } while (0)