gistfile1.txt

typedef struct {
   int tile_x, int tile_y;
   int num_polys; // idk just put whatever here 
   volatile s64 finished; // used to let the master thread know when this thread is finished
} thread_params;

thread_pool_function(rasterize_tile_thread, arg_var)
{
    thread_params* tp = (thread_params*)arg_var;
    rasterize_tile(tp->tile_x, tp->tile_y, ...);
    
    InterlockedIncrement64(&tp->finished);
}

thread_pool* tp = thread_pool_create(NUM_THREADS);

thread_params parms[NUM_THREADS];
for(int i = 0; i < NUM_THREADS; i++) {
   // setup parameters for thread i
   // perhaps the tile bounds in screen-space
   parms[i].tile_x = ...;
   params[i].finished = 0;
}



// this starts up the threads
for(int i = 0; i < NUM_THREADS; i++) {
  thread_pool_add_work(tp, raycast_wrapper, &parms[i]);
}


// now we just wait until all are finished
while(1) {
    int finished = 0;

    for(int i = 0; i < NUM_THREADS; i++) { 
        if(parms[i].finished) {
            finished++;
        }
    }
    if(finished == NUM_THREADS) {
        break;
    }
}