ObjFW  Diff

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#include "config.h"

#import "ObjFWRT.h"
#import "private.h"

#ifdef OF_HAVE_THREADS
# import "mutex.h"
#endif

struct weak_ref {
	id **locations;
	size_t count;
};

static struct objc_hashtable *hashtable;
#ifdef OF_HAVE_THREADS
static of_spinlock_t spinlock;
#endif

static uint32_t
hash(const void *object)
{
	return (uint32_t)(uintptr_t)object;
}

static bool
equal(const void *object1, const void *object2)
{
	return (object1 == object2);
}

OF_CONSTRUCTOR()
{
	hashtable = objc_hashtable_new(hash, equal, 2);

#ifdef OF_HAVE_THREADS
	if (of_spinlock_new(&spinlock) != 0)
		OBJC_ERROR("Failed to create spinlock!");
#endif
}

id
objc_retain(id object)
{







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#include "config.h"

#import "ObjFWRT.h"
#import "private.h"

#ifdef OF_HAVE_THREADS
# import "OFPlainMutex.h"
#endif

struct WeakRef {
	id **locations;
	size_t count;
};

static struct objc_hashtable *hashtable;
#ifdef OF_HAVE_THREADS
static OFSpinlock spinlock;
#endif

static uint32_t
hash(const void *object)
{
	return (uint32_t)(uintptr_t)object;
}

static bool
equal(const void *object1, const void *object2)
{
	return (object1 == object2);
}

OF_CONSTRUCTOR()
{
	hashtable = objc_hashtable_new(hash, equal, 2);

#ifdef OF_HAVE_THREADS
	if (OFSpinlockNew(&spinlock) != 0)
		OBJC_ERROR("Failed to create spinlock!");
#endif
}

id
objc_retain(id object)
{
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	return value;
}

id
objc_storeWeak(id *object, id value)
{
	struct weak_ref *old;

#ifdef OF_HAVE_THREADS
	if (of_spinlock_lock(&spinlock) != 0)
		OBJC_ERROR("Failed to lock spinlock!");
#endif

	if (*object != nil &&
	    (old = objc_hashtable_get(hashtable, *object)) != NULL) {
		for (size_t i = 0; i < old->count; i++) {
			if (old->locations[i] == object) {







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	return value;
}

id
objc_storeWeak(id *object, id value)
{
	struct WeakRef *old;

#ifdef OF_HAVE_THREADS
	if (OFSpinlockLock(&spinlock) != 0)
		OBJC_ERROR("Failed to lock spinlock!");
#endif

	if (*object != nil &&
	    (old = objc_hashtable_get(hashtable, *object)) != NULL) {
		for (size_t i = 0; i < old->count; i++) {
			if (old->locations[i] == object) {
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				break;
			}
		}
	}

	if (value != nil && class_respondsToSelector(object_getClass(value),
	    @selector(allowsWeakReference)) && [value allowsWeakReference]) {
		struct weak_ref *ref = objc_hashtable_get(hashtable, value);

		if (ref == NULL) {
			if ((ref = calloc(1, sizeof(*ref))) == NULL)
				OBJC_ERROR("Not enough memory to allocate weak "
				    "reference!");

			objc_hashtable_set(hashtable, value, ref);







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				break;
			}
		}
	}

	if (value != nil && class_respondsToSelector(object_getClass(value),
	    @selector(allowsWeakReference)) && [value allowsWeakReference]) {
		struct WeakRef *ref = objc_hashtable_get(hashtable, value);

		if (ref == NULL) {
			if ((ref = calloc(1, sizeof(*ref))) == NULL)
				OBJC_ERROR("Not enough memory to allocate weak "
				    "reference!");

			objc_hashtable_set(hashtable, value, ref);
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		ref->locations[ref->count++] = object;
	} else
		value = nil;

	*object = value;

#ifdef OF_HAVE_THREADS
	if (of_spinlock_unlock(&spinlock) != 0)
		OBJC_ERROR("Failed to unlock spinlock!");
#endif

	return value;
}

id
objc_loadWeakRetained(id *object)
{
	id value = nil;
	struct weak_ref *ref;

#ifdef OF_HAVE_THREADS
	if (of_spinlock_lock(&spinlock) != 0)
		OBJC_ERROR("Failed to lock spinlock!");
#endif

	if (*object != nil &&
	    (ref = objc_hashtable_get(hashtable, *object)) != NULL)
		value = *object;

#ifdef OF_HAVE_THREADS
	if (of_spinlock_unlock(&spinlock) != 0)
		OBJC_ERROR("Failed to unlock spinlock!");
#endif

	if (class_respondsToSelector(object_getClass(value),
	    @selector(retainWeakReference)) && [value retainWeakReference])
		return value;








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		ref->locations[ref->count++] = object;
	} else
		value = nil;

	*object = value;

#ifdef OF_HAVE_THREADS
	if (OFSpinlockUnlock(&spinlock) != 0)
		OBJC_ERROR("Failed to unlock spinlock!");
#endif

	return value;
}

id
objc_loadWeakRetained(id *object)
{
	id value = nil;
	struct WeakRef *ref;

#ifdef OF_HAVE_THREADS
	if (OFSpinlockLock(&spinlock) != 0)
		OBJC_ERROR("Failed to lock spinlock!");
#endif

	if (*object != nil &&
	    (ref = objc_hashtable_get(hashtable, *object)) != NULL)
		value = *object;

#ifdef OF_HAVE_THREADS
	if (OFSpinlockUnlock(&spinlock) != 0)
		OBJC_ERROR("Failed to unlock spinlock!");
#endif

	if (class_respondsToSelector(object_getClass(value),
	    @selector(retainWeakReference)) && [value retainWeakReference])
		return value;

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{
	objc_release(objc_initWeak(dest, objc_loadWeakRetained(src)));
}

void
objc_moveWeak(id *dest, id *src)
{
	struct weak_ref *ref;

#ifdef OF_HAVE_THREADS
	if (of_spinlock_lock(&spinlock) != 0)
		OBJC_ERROR("Failed to lock spinlock!");
#endif

	if (*src != nil &&
	    (ref = objc_hashtable_get(hashtable, *src)) != NULL) {
		for (size_t i = 0; i < ref->count; i++) {
			if (ref->locations[i] == src) {
				ref->locations[i] = dest;
				break;
			}
		}
	}

	*dest = *src;
	*src = nil;

#ifdef OF_HAVE_THREADS
	if (of_spinlock_unlock(&spinlock) != 0)
		OBJC_ERROR("Failed to unlock spinlock!");
#endif
}

void
objc_zero_weak_references(id value)
{
	struct weak_ref *ref;

#ifdef OF_HAVE_THREADS
	if (of_spinlock_lock(&spinlock) != 0)
		OBJC_ERROR("Failed to lock spinlock!");
#endif

	if ((ref = objc_hashtable_get(hashtable, value)) != NULL) {
		for (size_t i = 0; i < ref->count; i++)
			*ref->locations[i] = nil;

		objc_hashtable_delete(hashtable, value);
		free(ref->locations);
		free(ref);
	}

#ifdef OF_HAVE_THREADS
	if (of_spinlock_unlock(&spinlock) != 0)
		OBJC_ERROR("Failed to unlock spinlock!");
#endif
}







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{
	objc_release(objc_initWeak(dest, objc_loadWeakRetained(src)));
}

void
objc_moveWeak(id *dest, id *src)
{
	struct WeakRef *ref;

#ifdef OF_HAVE_THREADS
	if (OFSpinlockLock(&spinlock) != 0)
		OBJC_ERROR("Failed to lock spinlock!");
#endif

	if (*src != nil &&
	    (ref = objc_hashtable_get(hashtable, *src)) != NULL) {
		for (size_t i = 0; i < ref->count; i++) {
			if (ref->locations[i] == src) {
				ref->locations[i] = dest;
				break;
			}
		}
	}

	*dest = *src;
	*src = nil;

#ifdef OF_HAVE_THREADS
	if (OFSpinlockUnlock(&spinlock) != 0)
		OBJC_ERROR("Failed to unlock spinlock!");
#endif
}

void
objc_zeroWeakReferences(id value)
{
	struct WeakRef *ref;

#ifdef OF_HAVE_THREADS
	if (OFSpinlockLock(&spinlock) != 0)
		OBJC_ERROR("Failed to lock spinlock!");
#endif

	if ((ref = objc_hashtable_get(hashtable, value)) != NULL) {
		for (size_t i = 0; i < ref->count; i++)
			*ref->locations[i] = nil;

		objc_hashtable_delete(hashtable, value);
		free(ref->locations);
		free(ref);
	}

#ifdef OF_HAVE_THREADS
	if (OFSpinlockUnlock(&spinlock) != 0)
		OBJC_ERROR("Failed to unlock spinlock!");
#endif
}