move some more code out of pthread_create.c

this also de-uglifies the dummy function aliasing a bit.

src/thread/pthread_create.c

@@ -5,11 +5,7 @@ static void dummy_0()
 }
 weak_alias(dummy_0, __rsyscall_lock);
 weak_alias(dummy_0, __rsyscall_unlock);
-
-static void dummy_1(pthread_t self)
-{
-}
-weak_alias(dummy_1, __pthread_tsd_run_dtors);
+weak_alias(dummy_0, __pthread_tsd_run_dtors);
 
 #ifdef __pthread_unwind_next
 #undef __pthread_unwind_next
@@ -28,7 +24,7 @@ void __pthread_unwind_next(struct __ptcb *cb)
 
 	LOCK(&self->exitlock);
 
-	__pthread_tsd_run_dtors(self);
+	__pthread_tsd_run_dtors();
 
 	/* Mark this thread dead before decrementing count */
 	self->dead = 1;

src/thread/pthread_key_create.c

@@ -31,8 +31,9 @@ int pthread_key_delete(pthread_key_t k)
 	return 0;
 }
 
-void __pthread_tsd_run_dtors(pthread_t self)
+void __pthread_tsd_run_dtors()
 {
+	pthread_t self = __pthread_self();
 	int i, j, not_finished = self->tsd_used;
 	for (j=0; not_finished && j<PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
 		not_finished = 0;