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* file.
*/
#include "config.h"
#include <stdbool.h>
#import "once.h"
#ifdef OF_AMIGAOS
# include <proto/exec.h>
#endif
#if defined(OF_HAVE_THREADS) && defined(OF_HAVE_ATOMIC_OPS)
# import "atomic.h"
# import "mutex.h"
#endif
of_once(of_once_t *control, void (*func)(void))
if (of_atomic_int_cmpswap(control, 0, 1)) {
func();
of_memory_barrier();
of_atomic_int_inc(control);
} else
while (*control == 1)
of_thread_yield();
#elif defined(OF_AMIGAOS)
bool run = false;
/* Avoid Forbid() in case it's already done. */
if (*control == 2)
return;
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* file.
*/
#include "config.h"
#include <stdbool.h>
#import "OFOnce.h"
#if defined(OF_HAVE_THREADS) && defined(OF_HAVE_ATOMIC_OPS)
# import "OFAtomic.h"
# import "OFPlainMutex.h"
#endif
#ifdef OF_AMIGAOS
# include <proto/exec.h>
#endif
void
OFOnce(OFOnceControl *control, void (*func)(void))
{
#if !defined(OF_HAVE_THREADS)
if (*control == 0) {
func();
*control = 1;
}
#elif defined(OF_HAVE_PTHREADS)
pthread_once(control, func);
#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();
OFMemoryBarrier();
OFAtomicIntIncrease(control);
} else
while (*control == 1)
OFYieldThread();
#elif defined(OF_AMIGAOS)
bool run = false;
/* Avoid Forbid() in case it's already done. */
if (*control == 2)
return;
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Permit();
if (run) {
func();
*control = 2;
}
#else
# error No of_once available
#endif
}
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Permit();
if (run) {
func();
*control = 2;
}
#else
# error No OFOnce available
#endif
}
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