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/*
* Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
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/*
* Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
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#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;
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#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;
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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 &&
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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 &&
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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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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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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 &&
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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 &&
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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 &&
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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 &&
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#ifdef OF_HAVE_THREADS
if (OFSpinlockUnlock(&spinlock) != 0)
OBJC_ERROR("Failed to unlock spinlock!");
#endif
}
void
objc_zero_weak_references(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) {
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#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) {
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