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#endif
#ifdef OF_AMIGAOS
# include <proto/exec.h>
#endif
void
OFOnce(OFOnceControl *control, void (*func)(void))
OFOnce(OFOnceControl *control, void (*function)(void))
{
#if !defined(OF_HAVE_THREADS)
if (*control == 0) {
func();
function();
*control = 1;
}
#elif defined(OF_HAVE_PTHREADS)
pthread_once(control, func);
pthread_once(control, function);
#elif defined(OF_HAVE_ATOMIC_OPS)
/* Avoid atomic operations in case it's already done. */
if (*control == 2)
return;
if (OFAtomicIntCompareAndSwap(control, 0, 1)) {
func();
function();
OFMemoryBarrier();
OFAtomicIntIncrease(control);
} else
while (*control == 1)
OFYieldThread();
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Forbid();
}
}
Permit();
if (run) {
func();
function();
*control = 2;
}
#else
# error No OFOnce available
#endif
}
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