/* * Copyright (c) 2008, 2009, 2010, 2011 * Jonathan Schleifer <js@webkeks.org> * * 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. * * Alternatively, it may be distributed under the terms of the GNU General * Public License, either version 2 or 3, which can be found in the file * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this * file. */ #include "config.h" #include <assert.h> #import "OFObject.h" #ifdef OF_THREADS # import "threading.h" # 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 spinlocks[NUM_SPINLOCKS]; #endif BOOL objc_properties_init(void) { #ifdef OF_THREADS size_t i; for (i = 0; i < NUM_SPINLOCKS; i++) if (!of_spinlock_new(&spinlocks[i])) return NO; #endif return YES; } id objc_getProperty(id self, SEL _cmd, ptrdiff_t offset, BOOL atomic) { if (atomic) { id *ptr = (id*)(void*)((char*)self + offset); #ifdef OF_THREADS unsigned hash = SPINLOCK_HASH(ptr); assert(of_spinlock_lock(&spinlocks[hash])); @try { return [[*ptr retain] autorelease]; } @finally { assert(of_spinlock_unlock(&spinlocks[hash])); } #else return [[*ptr retain] autorelease]; #endif } return *(id*)(void*)((char*)self + offset); } void objc_setProperty(id self, SEL _cmd, ptrdiff_t offset, id value, BOOL atomic, BOOL copy) { if (atomic) { id *ptr = (id*)(void*)((char*)self + offset); #ifdef OF_THREADS unsigned hash = SPINLOCK_HASH(ptr); assert(of_spinlock_lock(&spinlocks[hash])); @try { #endif id old = *ptr; switch (copy) { case 0: *ptr = [value retain]; break; case 2: /* * Apple uses this to indicate that the copy * should be mutable. Please hit them for * abusing a poor BOOL! */ *ptr = [value mutableCopy]; break; default: *ptr = [value copy]; } [old release]; #ifdef OF_THREADS } @finally { assert(of_spinlock_unlock(&spinlocks[hash])); } #endif return; } id *ptr = (id*)(void*)((char*)self + offset); id old = *ptr; switch (copy) { case 0: *ptr = [value retain]; break; case 2: /* * Apple uses this to indicate that the copy should be mutable. * Please hit them for abusing a poor BOOL! */ *ptr = [value mutableCopy]; break; default: *ptr = [value copy]; } [old release]; }