Millisecond sleep in C on iOS4

Question

Im trying to sleep for a specified amount of millisecond in C on iphone but I keep getting some complaints on the console:

Detected an attempt to call a symbol in system libraries that is not present on the iPhone: nanosleep$UNIX2003 called from function ...

Detected an attempt to call a symbol in system libraries that is not present on the iPhone: usleep$UNIX2003 called from function ...

Detected an attempt to call a symbol in system libraries that is not present on the iPhone: select$UNIX2003 called from function ...

If usleep, nanosleep and select a not available how can I sleep for ? milliseconds in C on iOS4???

Im running out of ideas here...

Tks in advance,

Answer 1

you shouldn't sleep on the main thread. for a secondary thread, use a timer, notification, operation, or pthread interfaces.