ObjFW  Diff

struct class _NSConcreteGlobalBlock_metaclass;
struct class _NSConcreteMallocBlock_metaclass;
# endif
#endif

static struct {
	Class isa;
} alloc_failed_exception;
} allocFailedException;

#ifndef OF_HAVE_ATOMIC_OPS
# define numSpinlocks 8	/* needs to be a power of 2 */
# define SPINLOCK_HASH(p) ((uintptr_t)p >> 4) & (numSpinlocks - 1)
static OFSpinlock blockSpinlocks[numSpinlocks];
static OFSpinlock byrefSpinlocks[numSpinlocks];
#endif

void *
_Block_copy(const void *block_)
{
	struct Block *block = (struct Block *)block_;

	if ([(id)block isMemberOfClass: (Class)&_NSConcreteStackBlock]) {
		struct Block *copy;

		if ((copy = malloc(block->descriptor->size)) == NULL) {
			alloc_failed_exception.isa =
			    [OFAllocFailedException class];
			@throw (OFAllocFailedException *)
			object_setClass((id)&allocFailedException,
			    [OFAllocFailedException class]);
			@throw (OFAllocFailedException *)&allocFailedException;
			    &alloc_failed_exception;
		}
		memcpy(copy, block, block->descriptor->size);

		object_setClass((id)copy, (Class)&_NSConcreteMallocBlock);
		copy->flags++;

		if (block->flags & OFBlockHasCopyDispose)

		struct Byref *src = (struct Byref *)src_;
		struct Byref **dst = (struct Byref **)dst_;

		src = src->forwarding;

		if ((src->flags & OFBlockRefCountMask) == 0) {
			if ((*dst = malloc(src->size)) == NULL) {
				alloc_failed_exception.isa =
				    [OFAllocFailedException class];
				object_setClass((id)&allocFailedException,
				    [OFAllocFailedException class]);
				@throw (OFAllocFailedException *)
				    &alloc_failed_exception;
				    &allocFailedException;
			}

			memcpy(*dst, src, src->size);
			(*dst)->flags =
			    ((*dst)->flags & ~OFBlockRefCountMask) | 1;
			(*dst)->forwarding = *dst;