#include "_sdl.h" struct SDL_Thread {	SDL_ThreadFunction f;	const char *name;	void *userdata;	Channel *wait;}; static int prio[] = {	[SDL_THREAD_PRIORITY_LOW] = 5,	[SDL_THREAD_PRIORITY_NORMAL] = 10,	[SDL_THREAD_PRIORITY_HIGH] = 13,	[SDL_THREAD_PRIORITY_TIME_CRITICAL] = 100,}; static void sdlthread(void *p); SDL_Thread *SDL_CreateThreadWithStackSize(SDL_ThreadFunction f, const char *name, size_t stacksz, void *data){	SDL_Thread *t; 	if((t = calloc(1, sizeof(*t))) == nil)		return nil; 	t->f = f;	t->name = name;	t->userdata = data;	t->wait = chancreate(sizeof(int), 0); 	if(t->wait == nil || proccreate(sdlthread, t, stacksz) < 0){		if(t->wait != nil)			chanfree(t->wait);		free(t);		t = nil;	} 	return t;} SDL_Thread *SDL_CreateThread(SDL_ThreadFunction f, char *name, void *data){	return SDL_CreateThreadWithStackSize(f, name, mainstacksize, data);} voidSDL_DetachThread(SDL_Thread *t){	if(t != nil)		chanclose(t->wait);} voidSDL_WaitThread(SDL_Thread *t, int *status){	int r; 	if(t != nil){		recv(t->wait, &r);		if(status != nil)			*status = r;	}} voidSDL_SetThreadPriority(int p){	char t[32];	int f; 	if(p < 0 || p >= nelem(prio))		return; 	snprint(t, sizeof(t), "/proc/%d/ctl", getpid());	if((f = open(t, OWRITE)) >= 0){		fprint(f, "pri %d", prio[p]);		close(f);	}} static voidsdlthread(void *p){	SDL_Thread *t;	int res; 	t = p;	if(t->name != nil)		threadsetname(t->name); 	res = t->f(t->userdata);	send(t->wait, &res);	chanfree(t->wait);	free(t); 	threadexits(res == 0 ? nil : "error");}