/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
* Jonathan Schleifer <js@heap.zone>
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <sys/time.h>
#ifdef OF_APPLE_RUNTIME
# include <dlfcn.h>
#endif
#import "OFObject.h"
#import "OFArray.h"
#import "OFLocalization.h"
#import "OFTimer.h"
#import "OFRunLoop.h"
#import "OFThread.h"
#import "OFAllocFailedException.h"
#import "OFEnumerationMutationException.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFMemoryNotPartOfObjectException.h"
#import "OFNotImplementedException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#if defined(OF_APPLE_RUNTIME) && __OBJC2__
# import <objc/objc-exception.h>
#elif defined(OF_OBJFW_RUNTIME)
# import "ObjFW-RT.h"
#endif
#ifdef OF_WINDOWS
# include <windows.h>
#endif
#import "OFString.h"
#import "instance.h"
#if defined(OF_HAVE_ATOMIC_OPS)
# import "atomic.h"
#elif defined(OF_HAVE_THREADS)
# import "threading.h"
#endif
#if defined(OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR)
extern id of_forward(id, SEL, ...);
extern struct stret of_forward_stret(id, SEL, ...);
#else
# define of_forward of_method_not_found
# define of_forward_stret of_method_not_found_stret
#endif
struct pre_ivar {
int retainCount;
#if !defined(OF_HAVE_ATOMIC_OPS) && defined(OF_HAVE_THREADS)
of_spinlock_t retainCountSpinlock;
#endif
struct pre_mem *firstMem, *lastMem;
};
struct pre_mem {
struct pre_mem *prev, *next;
id owner;
};
#define PRE_IVARS_ALIGN ((sizeof(struct pre_ivar) + \
(OF_BIGGEST_ALIGNMENT - 1)) & ~(OF_BIGGEST_ALIGNMENT - 1))
#define PRE_IVARS ((struct pre_ivar *)(void *)((char *)self - PRE_IVARS_ALIGN))
#define PRE_MEM_ALIGN ((sizeof(struct pre_mem) + \
(OF_BIGGEST_ALIGNMENT - 1)) & ~(OF_BIGGEST_ALIGNMENT - 1))
#define PRE_MEM(mem) ((struct pre_mem *)(void *)((char *)mem - PRE_MEM_ALIGN))
static struct {
Class isa;
} allocFailedException;
uint32_t of_hash_seed;
#if !defined(OF_APPLE_RUNTIME) || defined(__OBJC2__)
static void
uncaughtExceptionHandler(id exception)
{
OFString *description = [exception description];
OFArray *backtrace = nil;
of_string_encoding_t encoding = [OFLocalization encoding];
fprintf(stderr, "\nRuntime error: Unhandled exception:\n%s\n",
[description cStringWithEncoding: encoding]);
if ([exception respondsToSelector: @selector(backtrace)])
backtrace = [exception backtrace];
if (backtrace != nil) {
OFString *s = [backtrace componentsJoinedByString: @"\n "];
fprintf(stderr, "\nBacktrace:\n %s\n\n",
[s cStringWithEncoding: encoding]);
}
abort();
}
#endif
static void
enumerationMutationHandler(id object)
{
@throw [OFEnumerationMutationException exceptionWithObject: object];
}
void OF_NO_RETURN_FUNC
of_method_not_found(id obj, SEL sel)
{
[obj doesNotRecognizeSelector: sel];
/*
* Just in case doesNotRecognizeSelector: returned, even though it must
* never return.
*/
abort();
}
void OF_NO_RETURN_FUNC
of_method_not_found_stret(void *st, id obj, SEL sel)
{
of_method_not_found(obj, sel);
}
id
of_alloc_object(Class class, size_t extraSize, size_t extraAlignment,
void **extra)
{
OFObject *instance;
size_t instanceSize;
instanceSize = class_getInstanceSize(class);
if OF_UNLIKELY (extraAlignment > 1)
extraAlignment = ((instanceSize + extraAlignment - 1) &
~(extraAlignment - 1)) - extraAlignment;
instance = malloc(PRE_IVARS_ALIGN + instanceSize +
extraAlignment + extraSize);
if OF_UNLIKELY (instance == nil) {
allocFailedException.isa = [OFAllocFailedException class];
@throw (id)&allocFailedException;
}
((struct pre_ivar *)instance)->retainCount = 1;
((struct pre_ivar *)instance)->firstMem = NULL;
((struct pre_ivar *)instance)->lastMem = NULL;
#if !defined(OF_HAVE_ATOMIC_OPS) && defined(OF_HAVE_THREADS)
if OF_UNLIKELY (!of_spinlock_new(
&((struct pre_ivar *)instance)->retainCountSpinlock)) {
free(instance);
@throw [OFInitializationFailedException
exceptionWithClass: class];
}
#endif
instance = (OFObject *)(void *)((char *)instance + PRE_IVARS_ALIGN);
memset(instance, 0, instanceSize);
if (!objc_constructInstance(class, instance)) {
free((char *)instance - PRE_IVARS_ALIGN);
@throw [OFInitializationFailedException
exceptionWithClass: class];
}
if OF_UNLIKELY (extra != NULL)
*extra = (char *)instance + instanceSize + extraAlignment;
return instance;
}
const char *
_NSPrintForDebugger(id object)
{
return [[object description]
cStringWithEncoding: [OFLocalization encoding]];
}
/* References for static linking */
void
_references_to_categories_of_OFObject(void)
{
_OFObject_KeyValueCoding_reference = 1;
_OFObject_Serialization_reference = 1;
}
@implementation OFObject
+ (void)load
{
#if !defined(OF_APPLE_RUNTIME) || defined(__OBJC2__)
objc_setUncaughtExceptionHandler(uncaughtExceptionHandler);
#endif
#if defined(OF_APPLE_RUNTIME)
/*
* If the NSFoundationVersionNumber symbol is defined, we are linked
* against Foundation. Since CoreFoundation sets its own forward
* handler on load, we should not set ours, as this will break
* Foundation.
*
* Unfortunately, there is no way to check if a forward handler has
* already been set, so this is the best we can do.
*/
if (dlsym(RTLD_DEFAULT, "NSFoundationVersionNumber") == NULL)
objc_setForwardHandler((void *)&of_forward,
(void *)&of_forward_stret);
#else
objc_setForwardHandler((IMP)&of_forward, (IMP)&of_forward_stret);
#endif
objc_setEnumerationMutationHandler(enumerationMutationHandler);
of_hash_seed = 0;
while (of_hash_seed == 0) {
#if defined(HAVE_ARC4RANDOM)
of_hash_seed = arc4random();
#elif defined(HAVE_RANDOM)
struct timeval t;
gettimeofday(&t, NULL);
srandom((unsigned)(t.tv_sec ^ t.tv_usec));
of_hash_seed = (uint32_t)((random() << 16) |
(random() & 0xFFFF));
#else
struct timeval t;
gettimeofday(&t, NULL);
srand((unsigned)(t.tv_sec ^ t.tv_usec));
of_hash_seed = (uint32_t)((rand() << 16) | (rand() & 0xFFFF));
#endif
}
}
+ (void)unload
{
}
+ (void)initialize
{
}
+ alloc
{
return of_alloc_object(self, 0, 0, NULL);
}
+ new
{
return [[self alloc] init];
}
+ (Class)class
{
return self;
}
+ (OFString *)className
{
return [OFString stringWithCString: class_getName(self)
encoding: OF_STRING_ENCODING_ASCII];
}
+ (bool)isSubclassOfClass: (Class)class
{
for (Class iter = self; iter != Nil; iter = class_getSuperclass(iter))
if (iter == class)
return true;
return false;
}
+ (Class)superclass
{
return class_getSuperclass(self);
}
+ (bool)instancesRespondToSelector: (SEL)selector
{
return class_respondsToSelector(self, selector);
}
+ (bool)conformsToProtocol: (Protocol *)protocol
{
Class c;
for (c = self; c != Nil; c = class_getSuperclass(c))
if (class_conformsToProtocol(c, protocol))
return true;
return false;
}
+ (IMP)instanceMethodForSelector: (SEL)selector
{
return class_getMethodImplementation(self, selector);
}
+ (const char *)typeEncodingForInstanceSelector: (SEL)selector
{
#if defined(OF_OBJFW_RUNTIME)
return class_getMethodTypeEncoding(self, selector);
#else
Method m;
if ((m = class_getInstanceMethod(self, selector)) == NULL)
return NULL;
return method_getTypeEncoding(m);
#endif
}
+ (OFString *)description
{
return [self className];
}
+ (IMP)replaceClassMethod: (SEL)selector
withMethodFromClass: (Class)class
{
IMP newImp;
const char *typeEncoding;
newImp = [class methodForSelector: selector];
typeEncoding = [class typeEncodingForSelector: selector];
return [self replaceClassMethod: selector
withImplementation: newImp
typeEncoding: typeEncoding];
}
+ (IMP)replaceInstanceMethod: (SEL)selector
withMethodFromClass: (Class)class
{
IMP newImp;
const char *typeEncoding;
newImp = [class instanceMethodForSelector: selector];
typeEncoding = [class typeEncodingForInstanceSelector: selector];
return [self replaceInstanceMethod: selector
withImplementation: newImp
typeEncoding: typeEncoding];
}
+ (IMP)replaceInstanceMethod: (SEL)selector
withImplementation: (IMP)implementation
typeEncoding: (const char *)typeEncoding
{
return class_replaceMethod(self, selector, implementation,
typeEncoding);
}
+ (IMP)replaceClassMethod: (SEL)selector
withImplementation: (IMP)implementation
typeEncoding: (const char *)typeEncoding
{
return class_replaceMethod(object_getClass(self), selector,
implementation, typeEncoding);
}
+ (void)inheritMethodsFromClass: (Class)class
{
Class superclass = [self superclass];
if ([self isSubclassOfClass: class])
return;
#if defined(OF_OBJFW_RUNTIME)
for (struct objc_method_list *methodlist =
object_getClass(class)->methodlist;
methodlist != NULL; methodlist = methodlist->next) {
for (unsigned int i = 0; i < methodlist->count; i++) {
SEL selector = (SEL)&methodlist->methods[i].sel;
/*
* Don't replace methods implemented in the receiving
* class.
*/
if ([self methodForSelector: selector] !=
[superclass methodForSelector: selector])
continue;
[self replaceClassMethod: selector
withMethodFromClass: class];
}
}
for (struct objc_method_list *methodlist = class->methodlist;
methodlist != NULL; methodlist = methodlist->next) {
for (unsigned int i = 0; i < methodlist->count; i++) {
SEL selector = (SEL)&methodlist->methods[i].sel;
/*
* Don't replace methods implemented in the receiving
* class.
*/
if ([self instanceMethodForSelector: selector] !=
[superclass instanceMethodForSelector: selector])
continue;
[self replaceInstanceMethod: selector
withMethodFromClass: class];
}
}
#elif defined(OF_APPLE_RUNTIME)
Method *methodList;
unsigned int count;
methodList = class_copyMethodList(object_getClass(class), &count);
@try {
for (unsigned int i = 0; i < count; i++) {
SEL selector = method_getName(methodList[i]);
/*
* Don't replace methods implemented in the receiving
* class.
*/
if ([self methodForSelector: selector] !=
[superclass methodForSelector: selector])
continue;
[self replaceClassMethod: selector
withMethodFromClass: class];
}
} @finally {
free(methodList);
}
methodList = class_copyMethodList(class, &count);
@try {
for (unsigned int i = 0; i < count; i++) {
SEL selector = method_getName(methodList[i]);
/*
* Don't replace methods implemented in the receiving
* class.
*/
if ([self instanceMethodForSelector: selector] !=
[superclass instanceMethodForSelector: selector])
continue;
[self replaceInstanceMethod: selector
withMethodFromClass: class];
}
} @finally {
free(methodList);
}
#endif
[self inheritMethodsFromClass: [class superclass]];
}
+ (BOOL)resolveClassMethod: (SEL)selector
{
return NO;
}
+ (BOOL)resolveInstanceMethod: (SEL)selector
{
return NO;
}
- init
{
return self;
}
- (Class)class
{
return object_getClass(self);
}
- (Class)superclass
{
return class_getSuperclass(object_getClass(self));
}
- (OFString *)className
{
return [OFString stringWithCString: object_getClassName(self)
encoding: OF_STRING_ENCODING_ASCII];
}
- (bool)isKindOfClass: (Class)class
{
for (Class iter = object_getClass(self); iter != Nil;
iter = class_getSuperclass(iter))
if (iter == class)
return true;
return false;
}
- (bool)isMemberOfClass: (Class)class
{
return (object_getClass(self) == class);
}
- (bool)respondsToSelector: (SEL)selector
{
return class_respondsToSelector(object_getClass(self), selector);
}
- (bool)conformsToProtocol: (Protocol *)protocol
{
return [object_getClass(self) conformsToProtocol: protocol];
}
- (IMP)methodForSelector: (SEL)selector
{
return class_getMethodImplementation(object_getClass(self), selector);
}
- (id)performSelector: (SEL)selector
{
#if defined(OF_OBJFW_RUNTIME)
id (*imp)(id, SEL) = (id (*)(id, SEL))objc_msg_lookup(self, selector);
#elif defined(OF_APPLE_RUNTIME)
id (*imp)(id, SEL) = (id (*)(id, SEL))objc_msgSend;
#endif
return imp(self, selector);
}
- (id)performSelector: (SEL)selector
withObject: (id)object
{
#if defined(OF_OBJFW_RUNTIME)
id (*imp)(id, SEL, id) =
(id (*)(id, SEL, id))objc_msg_lookup(self, selector);
#elif defined(OF_APPLE_RUNTIME)
id (*imp)(id, SEL, id) = (id (*)(id, SEL, id))objc_msgSend;
#endif
return imp(self, selector, object);
}
- (id)performSelector: (SEL)selector
withObject: (id)object1
withObject: (id)object2
{
#if defined(OF_OBJFW_RUNTIME)
id (*imp)(id, SEL, id, id) =
(id (*)(id, SEL, id, id))objc_msg_lookup(self, selector);
#elif defined(OF_APPLE_RUNTIME)
id (*imp)(id, SEL, id, id) = (id (*)(id, SEL, id, id))objc_msgSend;
#endif
return imp(self, selector, object1, object2);
}
- (void)performSelector: (SEL)selector
afterDelay: (of_time_interval_t)delay
{
void *pool = objc_autoreleasePoolPush();
[OFTimer scheduledTimerWithTimeInterval: delay
target: self
selector: selector
repeats: false];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
withObject: (id)object
afterDelay: (of_time_interval_t)delay
{
void *pool = objc_autoreleasePoolPush();
[OFTimer scheduledTimerWithTimeInterval: delay
target: self
selector: selector
object: object
repeats: false];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
withObject: (id)object1
withObject: (id)object2
afterDelay: (of_time_interval_t)delay
{
void *pool = objc_autoreleasePoolPush();
[OFTimer scheduledTimerWithTimeInterval: delay
target: self
selector: selector
object: object1
object: object2
repeats: false];
objc_autoreleasePoolPop(pool);
}
#ifdef OF_HAVE_THREADS
- (void)performSelector: (SEL)selector
onThread: (OFThread *)thread
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
repeats: false];
[[thread runLoop] addTimer: timer];
if (waitUntilDone)
[timer waitUntilDone];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
onThread: (OFThread *)thread
withObject: (id)object
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
object: object
repeats: false];
[[thread runLoop] addTimer: timer];
if (waitUntilDone)
[timer waitUntilDone];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
onThread: (OFThread *)thread
withObject: (id)object1
withObject: (id)object2
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
object: object1
object: object2
repeats: false];
[[thread runLoop] addTimer: timer];
if (waitUntilDone)
[timer waitUntilDone];
objc_autoreleasePoolPop(pool);
}
- (void)performSelectorOnMainThread: (SEL)selector
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
repeats: false];
[[OFRunLoop mainRunLoop] addTimer: timer];
if (waitUntilDone)
[timer waitUntilDone];
objc_autoreleasePoolPop(pool);
}
- (void)performSelectorOnMainThread: (SEL)selector
withObject: (id)object
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
object: object
repeats: false];
[[OFRunLoop mainRunLoop] addTimer: timer];
if (waitUntilDone)
[timer waitUntilDone];
objc_autoreleasePoolPop(pool);
}
- (void)performSelectorOnMainThread: (SEL)selector
withObject: (id)object1
withObject: (id)object2
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
object: object1
object: object2
repeats: false];
[[OFRunLoop mainRunLoop] addTimer: timer];
if (waitUntilDone)
[timer waitUntilDone];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
onThread: (OFThread *)thread
afterDelay: (of_time_interval_t)delay
{
void *pool = objc_autoreleasePoolPush();
[[thread runLoop] addTimer: [OFTimer timerWithTimeInterval: delay
target: self
selector: selector
repeats: false]];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
onThread: (OFThread *)thread
withObject: (id)object
afterDelay: (of_time_interval_t)delay
{
void *pool = objc_autoreleasePoolPush();
[[thread runLoop] addTimer: [OFTimer timerWithTimeInterval: delay
target: self
selector: selector
object: object
repeats: false]];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
onThread: (OFThread *)thread
withObject: (id)object1
withObject: (id)object2
afterDelay: (of_time_interval_t)delay
{
void *pool = objc_autoreleasePoolPush();
[[thread runLoop] addTimer: [OFTimer timerWithTimeInterval: delay
target: self
selector: selector
object: object1
object: object2
repeats: false]];
objc_autoreleasePoolPop(pool);
}
#endif
- (const char *)typeEncodingForSelector: (SEL)selector
{
#if defined(OF_OBJFW_RUNTIME)
return class_getMethodTypeEncoding(object_getClass(self), selector);
#else
Method m;
if ((m = class_getInstanceMethod(object_getClass(self),
selector)) == NULL)
return NULL;
return method_getTypeEncoding(m);
#endif
}
- (bool)isEqual: (id)object
{
return (self == object);
}
- (uint32_t)hash
{
uintptr_t ptr = (uintptr_t)self;
uint32_t hash;
OF_HASH_INIT(hash);
for (size_t i = 0; i < sizeof(ptr); i++) {
OF_HASH_ADD(hash, ptr & 0xFF);
ptr >>= 8;
}
OF_HASH_FINALIZE(hash);
return hash;
}
- (OFString *)description
{
/* Classes containing data should reimplement this! */
return [OFString stringWithFormat: @"<%@>", [self className]];
}
- (void *)allocMemoryWithSize: (size_t)size
{
void *pointer;
struct pre_mem *preMem;
if OF_UNLIKELY (size == 0)
return NULL;
if OF_UNLIKELY (size > SIZE_MAX - PRE_IVARS_ALIGN)
@throw [OFOutOfRangeException exception];
if OF_UNLIKELY ((pointer = malloc(PRE_MEM_ALIGN + size)) == NULL)
@throw [OFOutOfMemoryException
exceptionWithRequestedSize: size];
preMem = pointer;
preMem->owner = self;
preMem->prev = PRE_IVARS->lastMem;
preMem->next = NULL;
if OF_LIKELY (PRE_IVARS->lastMem != NULL)
PRE_IVARS->lastMem->next = preMem;
if OF_UNLIKELY (PRE_IVARS->firstMem == NULL)
PRE_IVARS->firstMem = preMem;
PRE_IVARS->lastMem = preMem;
return (char *)pointer + PRE_MEM_ALIGN;
}
- (void *)allocMemoryWithSize: (size_t)size
count: (size_t)count
{
if OF_UNLIKELY (count > SIZE_MAX / size)
@throw [OFOutOfRangeException exception];
return [self allocMemoryWithSize: size * count];
}
- (void *)resizeMemory: (void *)pointer
size: (size_t)size
{
void *new;
struct pre_mem *preMem;
if OF_UNLIKELY (pointer == NULL)
return [self allocMemoryWithSize: size];
if OF_UNLIKELY (size == 0) {
[self freeMemory: pointer];
return NULL;
}
if OF_UNLIKELY (PRE_MEM(pointer)->owner != self)
@throw [OFMemoryNotPartOfObjectException
exceptionWithPointer: pointer
object: self];
if OF_UNLIKELY ((new = realloc(PRE_MEM(pointer),
PRE_MEM_ALIGN + size)) == NULL)
@throw [OFOutOfMemoryException
exceptionWithRequestedSize: size];
preMem = new;
if OF_UNLIKELY (preMem != PRE_MEM(pointer)) {
if OF_LIKELY (preMem->prev != NULL)
preMem->prev->next = preMem;
if OF_LIKELY (preMem->next != NULL)
preMem->next->prev = preMem;
if OF_UNLIKELY (PRE_IVARS->firstMem == PRE_MEM(pointer))
PRE_IVARS->firstMem = preMem;
if OF_UNLIKELY (PRE_IVARS->lastMem == PRE_MEM(pointer))
PRE_IVARS->lastMem = preMem;
}
return (char *)new + PRE_MEM_ALIGN;
}
- (void *)resizeMemory: (void *)pointer
size: (size_t)size
count: (size_t)count
{
if OF_UNLIKELY (pointer == NULL)
return [self allocMemoryWithSize: size
count: count];
if OF_UNLIKELY (size == 0 || count == 0) {
[self freeMemory: pointer];
return NULL;
}
if OF_UNLIKELY (count > SIZE_MAX / size)
@throw [OFOutOfRangeException exception];
return [self resizeMemory: pointer
size: size * count];
}
- (void)freeMemory: (void *)pointer
{
if OF_UNLIKELY (pointer == NULL)
return;
if OF_UNLIKELY (PRE_MEM(pointer)->owner != self)
@throw [OFMemoryNotPartOfObjectException
exceptionWithPointer: pointer
object: self];
if OF_LIKELY (PRE_MEM(pointer)->prev != NULL)
PRE_MEM(pointer)->prev->next = PRE_MEM(pointer)->next;
if OF_LIKELY (PRE_MEM(pointer)->next != NULL)
PRE_MEM(pointer)->next->prev = PRE_MEM(pointer)->prev;
if OF_UNLIKELY (PRE_IVARS->firstMem == PRE_MEM(pointer))
PRE_IVARS->firstMem = PRE_MEM(pointer)->next;
if OF_UNLIKELY (PRE_IVARS->lastMem == PRE_MEM(pointer))
PRE_IVARS->lastMem = PRE_MEM(pointer)->prev;
/* To detect double-free */
PRE_MEM(pointer)->owner = nil;
free(PRE_MEM(pointer));
}
- (id)forwardingTargetForSelector: (SEL)selector
{
return nil;
}
- (void)doesNotRecognizeSelector: (SEL)selector
{
@throw [OFNotImplementedException exceptionWithSelector: selector
object: self];
}
- retain
{
#if defined(OF_HAVE_ATOMIC_OPS)
of_atomic_int_inc(&PRE_IVARS->retainCount);
#else
OF_ENSURE(of_spinlock_lock(&PRE_IVARS->retainCountSpinlock));
PRE_IVARS->retainCount++;
OF_ENSURE(of_spinlock_unlock(&PRE_IVARS->retainCountSpinlock));
#endif
return self;
}
- (unsigned int)retainCount
{
assert(PRE_IVARS->retainCount >= 0);
return PRE_IVARS->retainCount;
}
- (void)release
{
#if defined(OF_HAVE_ATOMIC_OPS)
of_memory_barrier_release();
if (of_atomic_int_dec(&PRE_IVARS->retainCount) <= 0) {
of_memory_barrier_acquire();
[self dealloc];
}
#else
size_t c;
OF_ENSURE(of_spinlock_lock(&PRE_IVARS->retainCountSpinlock));
c = --PRE_IVARS->retainCount;
OF_ENSURE(of_spinlock_unlock(&PRE_IVARS->retainCountSpinlock));
if (c == 0)
[self dealloc];
#endif
}
- autorelease
{
return _objc_rootAutorelease(self);
}
- self
{
return self;
}
- (bool)isProxy
{
return false;
}
- (bool)allowsWeakReference
{
return true;
}
- (bool)retainWeakReference
{
[self retain];
return true;
}
- (void)dealloc
{
struct pre_mem *iter;
objc_destructInstance(self);
iter = PRE_IVARS->firstMem;
while (iter != NULL) {
struct pre_mem *next = iter->next;
/*
* We can use owner as a sentinel to prevent exploitation in
* case there is a buffer underflow somewhere.
*/
OF_ENSURE(iter->owner == self);
free(iter);
iter = next;
}
free((char *)self - PRE_IVARS_ALIGN);
}
/* Required to use properties with the Apple runtime */
- copyWithZone: (void *)zone
{
if OF_UNLIKELY (zone != NULL) {
[self doesNotRecognizeSelector: _cmd];
abort();
}
return [(id)self copy];
}
- mutableCopyWithZone: (void *)zone
{
if OF_UNLIKELY (zone != NULL) {
[self doesNotRecognizeSelector: _cmd];
abort();
}
return [(id)self mutableCopy];
}
/*
* Those are needed as the root class is the superclass of the root class's
* metaclass and thus instance methods can be sent to class objects as well.
*/
+ (void *)allocMemoryWithSize: (size_t)size
{
OF_UNRECOGNIZED_SELECTOR
}
+ (void *)allocMemoryWithSize: (size_t)size
count: (size_t)count
{
OF_UNRECOGNIZED_SELECTOR
}
+ (void *)resizeMemory: (void *)pointer
size: (size_t)size
{
OF_UNRECOGNIZED_SELECTOR
}
+ (void *)resizeMemory: (void *)pointer
size: (size_t)size
count: (size_t)count
{
OF_UNRECOGNIZED_SELECTOR
}
+ (void)freeMemory: (void *)pointer
{
OF_UNRECOGNIZED_SELECTOR
}
+ retain
{
return self;
}
+ autorelease
{
return self;
}
+ (unsigned int)retainCount
{
return OF_RETAIN_COUNT_MAX;
}
+ (void)release
{
}
+ (void)dealloc
{
OF_UNRECOGNIZED_SELECTOR
}
+ copy
{
return self;
}
+ mutableCopyWithZone: (void *)zone
{
OF_UNRECOGNIZED_SELECTOR
}
/* Required to use ObjFW from Swift */
+ allocWithZone: (void *)zone
{
if OF_UNLIKELY (zone != NULL) {
[self doesNotRecognizeSelector: _cmd];
abort();
}
return [self alloc];
}
@end