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static struct {
Class isa;
} alloc_failed_exception;
#ifndef OF_HAVE_ATOMIC_OPS
# define NUM_SPINLOCKS 8 /* needs to be a power of 2 */
# define SPINLOCK_HASH(p) ((uintptr_t)p >> 4) & (NUM_SPINLOCKS - 1)
static of_spinlock_t blockSpinlocks[NUM_SPINLOCKS];
static of_spinlock_t byrefSpinlocks[NUM_SPINLOCKS];
static OFSpinlock blockSpinlocks[NUM_SPINLOCKS];
static OFSpinlock byrefSpinlocks[NUM_SPINLOCKS];
#endif
void *
_Block_copy(const void *block_)
{
struct block *block = (struct block *)block_;
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if ([(id)block isMemberOfClass: (Class)&_NSConcreteMallocBlock]) {
#ifdef OF_HAVE_ATOMIC_OPS
of_atomic_int_inc(&block->flags);
#else
unsigned hash = SPINLOCK_HASH(block);
OF_ENSURE(of_spinlock_lock(&blockSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockLock(&blockSpinlocks[hash]) == 0);
block->flags++;
OF_ENSURE(of_spinlock_unlock(&blockSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockUnlock(&blockSpinlocks[hash]) == 0);
#endif
}
return block;
}
void
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block->descriptor->dispose_helper(block);
free(block);
}
#else
unsigned hash = SPINLOCK_HASH(block);
OF_ENSURE(of_spinlock_lock(&blockSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockLock(&blockSpinlocks[hash]) == 0);
if ((--block->flags & OF_BLOCK_REFCOUNT_MASK) == 0) {
OF_ENSURE(of_spinlock_unlock(&blockSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockUnlock(&blockSpinlocks[hash]) == 0);
if (block->flags & OF_BLOCK_HAS_COPY_DISPOSE)
block->descriptor->dispose_helper(block);
free(block);
return;
}
OF_ENSURE(of_spinlock_unlock(&blockSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockUnlock(&blockSpinlocks[hash]) == 0);
#endif
}
void
_Block_object_assign(void *dst_, const void *src_, const int flags_)
{
int flags = flags_ & (OF_BLOCK_FIELD_IS_BLOCK |
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free(*dst);
*dst = src->forwarding;
}
#else
unsigned hash = SPINLOCK_HASH(src);
OF_ENSURE(of_spinlock_lock(&byrefSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockLock(&byrefSpinlocks[hash]) == 0);
if (src->forwarding == src)
src->forwarding = *dst;
else {
src->byref_dispose(*dst);
free(*dst);
*dst = src->forwarding;
}
OF_ENSURE(
of_spinlock_unlock(&byrefSpinlocks[hash]) == 0);
OFSpinlockUnlock(&byrefSpinlocks[hash]) == 0);
#endif
} else
*dst = src;
#ifdef OF_HAVE_ATOMIC_OPS
of_atomic_int_inc(&(*dst)->flags);
#else
unsigned hash = SPINLOCK_HASH(*dst);
OF_ENSURE(of_spinlock_lock(&byrefSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockLock(&byrefSpinlocks[hash]) == 0);
(*dst)->flags++;
OF_ENSURE(of_spinlock_unlock(&byrefSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockUnlock(&byrefSpinlocks[hash]) == 0);
#endif
break;
}
}
void
_Block_object_dispose(const void *object_, const int flags_)
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object->byref_dispose(object);
free(object);
}
#else
unsigned hash = SPINLOCK_HASH(object);
OF_ENSURE(of_spinlock_lock(&byrefSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockLock(&byrefSpinlocks[hash]) == 0);
if ((--object->flags & OF_BLOCK_REFCOUNT_MASK) == 0) {
OF_ENSURE(
of_spinlock_unlock(&byrefSpinlocks[hash]) == 0);
OFSpinlockUnlock(&byrefSpinlocks[hash]) == 0);
if (object->flags & OF_BLOCK_HAS_COPY_DISPOSE)
object->byref_dispose(object);
free(object);
}
OF_ENSURE(of_spinlock_unlock(&byrefSpinlocks[hash]) == 0);
OF_ENSURE(OFSpinlockUnlock(&byrefSpinlocks[hash]) == 0);
#endif
break;
}
}
@implementation OFBlock
+ (void)load
{
#ifndef OF_HAVE_ATOMIC_OPS
for (size_t i = 0; i < NUM_SPINLOCKS; i++)
if (of_spinlock_new(&blockSpinlocks[i]) != 0 ||
of_spinlock_new(&byrefSpinlocks[i]) != 0)
if (OFSpinlockNew(&blockSpinlocks[i]) != 0 ||
OFSpinlockNew(&byrefSpinlocks[i]) != 0)
@throw [OFInitializationFailedException
exceptionWithClass: self];
#endif
#ifdef OF_APPLE_RUNTIME
Class tmp;
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