Added native atomic operations for Windows, Mac OS X, and gcc compiler intrinsics. Changed the CAS return value to bool, so it's efficient with OSAtomicCompareAndSwap32Barrier() Added an atomic test adapted from code by Michael Davidsaver

/**
 * Part of SDL test suite.
 *
 * Written by Edgar Simo "bobbens"
 *
 * Released under Public Domain.
 */


#ifndef _TEST_SURFACE
#  define _TEST_SURFACE


int test_surface (void);


#endif /* _TEST_SURFACE */