#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>

#define ADD_MUTEX_SAFETY

Uint8 run;
#ifdef ADD_MUTEX_SAFETY
SDL_mutex *mutex;
#endif

int Load(void* data)
{
	while (run)
	{
#ifdef ADD_MUTEX_SAFETY
		SDL_LockMutex(mutex);
#endif
		SDL_Surface *sur = IMG_Load("blue.png");
		SDL_Log("%lu %lX\n", SDL_ThreadID(), sur);
		SDL_FreeSurface(sur);
#ifdef ADD_MUTEX_SAFETY
		SDL_UnlockMutex(mutex);
#endif
	}
}

int main(int argc, char **argv)
{
	SDL_Thread **thread;
	SDL_Event evt;
	int cpus, i;

	SDL_Init(SDL_INIT_EVENTS);
#ifdef ADD_MUTEX_SAFETY
	mutex = SDL_CreateMutex();
#endif

	run = 1;
	cpus = SDL_GetCPUCount() - 1;
	thread = (SDL_Thread**) SDL_malloc(sizeof(SDL_Thread*) * cpus);
	for (i = 0; i < cpus; i += 1)
	{
		thread[i] = SDL_CreateThread(Load, NULL, NULL);
	}

	while (run)
	{
		while (SDL_PollEvent(&evt) > 0)
		{
			if (evt.type == SDL_QUIT)
			{
				run = 0;
			}
		}
	}
	
	for (i = 0; i < cpus; i += 1)
	{
		SDL_WaitThread(thread[i], NULL);
	}
#ifdef ADD_MUTEX_SAFETY
	SDL_DestroyMutex(mutex);
#endif
	SDL_free(thread);
	SDL_Quit();
}