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#import "runtime.h"
#import "runtime-private.h"
#import "OFObject.h"
#import "macros.h"
#ifdef OF_THREADS
#ifdef OF_HAVE_THREADS
# import "threading.h"
# define NUM_SPINLOCKS 8 /* needs to be a power of 2 */
# define SPINLOCK_HASH(p) ((unsigned)((uintptr_t)p >> 4) & (NUM_SPINLOCKS - 1))
static of_spinlock_t spinlocks[NUM_SPINLOCKS];
#endif
#ifdef OF_THREADS
#ifdef OF_HAVE_THREADS
static void __attribute__((constructor))
init(void)
{
size_t i;
for (i = 0; i < NUM_SPINLOCKS; i++)
if (!of_spinlock_new(&spinlocks[i]))
OBJC_ERROR("Failed to initialize spinlocks!")
}
#endif
id
objc_getProperty(id self, SEL _cmd, ptrdiff_t offset, BOOL atomic)
{
if (atomic) {
id *ptr = (id*)(void*)((char*)self + offset);
#ifdef OF_THREADS
#ifdef OF_HAVE_THREADS
unsigned hash = SPINLOCK_HASH(ptr);
OF_ENSURE(of_spinlock_lock(&spinlocks[hash]));
@try {
return [[*ptr retain] autorelease];
} @finally {
OF_ENSURE(of_spinlock_unlock(&spinlocks[hash]));
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void
objc_setProperty(id self, SEL _cmd, ptrdiff_t offset, id value, BOOL atomic,
signed char copy)
{
if (atomic) {
id *ptr = (id*)(void*)((char*)self + offset);
#ifdef OF_THREADS
#ifdef OF_HAVE_THREADS
unsigned hash = SPINLOCK_HASH(ptr);
OF_ENSURE(of_spinlock_lock(&spinlocks[hash]));
@try {
#endif
id old = *ptr;
switch (copy) {
case 0:
*ptr = [value retain];
break;
case 2:
*ptr = [value mutableCopy];
break;
default:
*ptr = [value copy];
}
[old release];
#ifdef OF_THREADS
#ifdef OF_HAVE_THREADS
} @finally {
OF_ENSURE(of_spinlock_unlock(&spinlocks[hash]));
}
#endif
return;
}
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/* The following methods are only required for GCC >= 4.6 */
void
objc_getPropertyStruct(void *dest, const void *src, ptrdiff_t size, BOOL atomic,
BOOL strong)
{
if (atomic) {
#ifdef OF_THREADS
#ifdef OF_HAVE_THREADS
unsigned hash = SPINLOCK_HASH(src);
OF_ENSURE(of_spinlock_lock(&spinlocks[hash]));
#endif
memcpy(dest, src, size);
#ifdef OF_THREADS
#ifdef OF_HAVE_THREADS
OF_ENSURE(of_spinlock_unlock(&spinlocks[hash]));
#endif
return;
}
memcpy(dest, src, size);
}
void
objc_setPropertyStruct(void *dest, const void *src, ptrdiff_t size, BOOL atomic,
BOOL strong)
{
if (atomic) {
#ifdef OF_THREADS
#ifdef OF_HAVE_THREADS
unsigned hash = SPINLOCK_HASH(src);
OF_ENSURE(of_spinlock_lock(&spinlocks[hash]));
#endif
memcpy(dest, src, size);
#ifdef OF_THREADS
#ifdef OF_HAVE_THREADS
OF_ENSURE(of_spinlock_unlock(&spinlocks[hash]));
#endif
return;
}
memcpy(dest, src, size);
}
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