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* file.
*/
#include "objfw-defs.h"
#import "macros.h"
/** @file */
typedef void (*OFOnceFunction)(void);
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* file.
*/
#include "objfw-defs.h"
#import "macros.h"
#if defined(OF_HAVE_PTHREADS)
# include <pthread.h>
typedef pthread_once_t OFOnceControl;
# define OFOnceControlInitValue PTHREAD_ONCE_INIT
#elif defined(OF_HAVE_ATOMIC_OPS)
typedef volatile int OFOnceControl;
# define OFOnceControlInitValue 0
#elif defined(OF_AMIGAOS) || !defined(OF_HAVE_THREADS)
typedef int OFOnceControl;
# define OFOnceControlInitValue 0
#endif
OF_ASSUME_NONNULL_BEGIN
/** @file */
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Executes the specified function exactly once in the application's
* lifetime, even in a multi-threaded environment.
*
* @param control An OFOnceControl. This should be a static variable
* preinitialized to `OFOnceControlInitValue`.
* @param function The function to execute once
*/
extern void OFOnce(OFOnceControl *control, void (*function)(void));
#ifdef __cplusplus
}
#endif
OF_ASSUME_NONNULL_END
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