explain the "brainfuck condition"

2013-10-28 12:54:16 +01:00 · 2013-10-28 12:54:16 +01:00 · f1b89df8d8
commit f1b89df8d8
parent 5e6cc92291
1 changed files with 1 additions and 1 deletions
--- a/core/msg.c
+++ b/core/msg.c
@ -275,7 +275,7 @@ static int _msg_receive(msg_t *m, int block)

 int msg_init_queue(msg_t *array, int num)
 {
-    /* make sure brainfuck condition is met */
+    /* check if num is a power of two by comparing to its complement */
    if (num && (num & (num - 1)) == 0) {
        tcb_t *me = (tcb_t*) active_thread;
        me->msg_array = array;