/*
* Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
*
* 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 "unistd_wrapper.h"
#include <assert.h>
#ifdef OF_APPLE_RUNTIME
# include <dlfcn.h>
#endif
#ifdef HAVE_GETRANDOM
# include <sys/random.h>
#endif
#import "OFObject.h"
#import "OFArray.h"
#ifdef OF_HAVE_ATOMIC_OPS
# import "OFAtomic.h"
#endif
#import "OFLocale.h"
#import "OFMethodSignature.h"
#import "OFRunLoop.h"
#if !defined(OF_HAVE_ATOMIC_OPS) && defined(OF_HAVE_THREADS)
# import "OFPlainMutex.h" /* For OFSpinlock */
#endif
#import "OFString.h"
#import "OFThread.h"
#import "OFTimer.h"
#import "OFAllocFailedException.h"
#import "OFEnumerationMutationException.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.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 "ObjFWRT.h"
#endif
#ifdef OF_WINDOWS
# include <windows.h>
#endif
#ifdef OF_AMIGAOS
# include <proto/exec.h>
#endif
#ifdef OF_APPLE_RUNTIME
extern id _Nullable _objc_rootAutorelease(id _Nullable object);
#endif
#if defined(OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR)
extern id OFForward(id, SEL, ...);
extern struct Stret OFForward_stret(id, SEL, ...);
#else
# define OFForward OFMethodNotFound
# define OFForward_stret OFMethodNotFound_stret
#endif
struct PreIvars {
int retainCount;
#if !defined(OF_HAVE_ATOMIC_OPS) && !defined(OF_AMIGAOS)
OFSpinlock retainCountSpinlock;
#endif
};
#define PRE_IVARS_ALIGN ((sizeof(struct PreIvars) + \
(OF_BIGGEST_ALIGNMENT - 1)) & ~(OF_BIGGEST_ALIGNMENT - 1))
#define PRE_IVARS ((struct PreIvars *)(void *)((char *)self - PRE_IVARS_ALIGN))
static struct {
Class isa;
} allocFailedException;
unsigned long OFHashSeed;
void *
OFAllocMemory(size_t count, size_t size)
{
void *pointer;
if OF_UNLIKELY (count == 0 || size == 0)
return NULL;
if OF_UNLIKELY (count > SIZE_MAX / size)
@throw [OFOutOfRangeException exception];
if OF_UNLIKELY ((pointer = malloc(count * size)) == NULL)
@throw [OFOutOfMemoryException
exceptionWithRequestedSize: size];
return pointer;
}
void *
OFAllocZeroedMemory(size_t count, size_t size)
{
void *pointer;
if OF_UNLIKELY (count == 0 || size == 0)
return NULL;
/* Not all calloc implementations check for overflow. */
if OF_UNLIKELY (count > SIZE_MAX / size)
@throw [OFOutOfRangeException exception];
if OF_UNLIKELY ((pointer = calloc(count, size)) == NULL)
@throw [OFOutOfMemoryException
exceptionWithRequestedSize: size];
return pointer;
}
void *
OFResizeMemory(void *pointer, size_t count, size_t size)
{
if OF_UNLIKELY (count == 0 || size == 0) {
free(pointer);
return NULL;
}
if OF_UNLIKELY (count > SIZE_MAX / size)
@throw [OFOutOfRangeException exception];
if OF_UNLIKELY ((pointer = realloc(pointer, count * size)) == NULL)
@throw [OFOutOfMemoryException
exceptionWithRequestedSize: size];
return pointer;
}
void
OFFreeMemory(void *pointer)
{
free(pointer);
}
#if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_GETRANDOM)
static void
initRandom(void)
{
struct timeval tv;
# ifdef HAVE_RANDOM
gettimeofday(&tv, NULL);
srandom((unsigned)(tv.tv_sec ^ tv.tv_usec));
# else
gettimeofday(&tv, NULL);
srand((unsigned)(tv.tv_sec ^ tv.tv_usec));
# endif
}
#endif
uint16_t
OFRandom16(void)
{
#if defined(HAVE_ARC4RANDOM)
return arc4random();
#elif defined(HAVE_GETRANDOM)
uint16_t buffer;
OFEnsure(getrandom(&buffer, sizeof(buffer), 0) == sizeof(buffer));
return buffer;
#else
static OFOnceControl onceControl = OFOnceControlInitValue;
OFOnce(&onceControl, initRandom);
# ifdef HAVE_RANDOM
return random() & 0xFFFF;
# else
return rand() & 0xFFFF;
# endif
#endif
}
uint32_t
OFRandom32(void)
{
#if defined(HAVE_ARC4RANDOM)
return arc4random();
#elif defined(HAVE_GETRANDOM)
uint32_t buffer;
OFEnsure(getrandom(&buffer, sizeof(buffer), 0) == sizeof(buffer));
return buffer;
#else
return ((uint32_t)OFRandom16() << 16) | OFRandom16();
#endif
}
uint64_t
OFRandom64(void)
{
#if defined(HAVE_ARC4RANDOM_BUF)
uint64_t buffer;
arc4random_buf(&buffer, sizeof(buffer));
return buffer;
#elif defined(HAVE_GETRANDOM)
uint64_t buffer;
OFEnsure(getrandom(&buffer, sizeof(buffer), 0) == sizeof(buffer));
return buffer;
#else
return ((uint64_t)OFRandom32() << 32) | OFRandom32();
#endif
}
void
OFHashInit(unsigned long *hash)
{
*hash = OFHashSeed;
}
static const char *
typeEncodingForSelector(Class class, SEL selector)
{
Method method;
if ((method = class_getInstanceMethod(class, selector)) == NULL)
return NULL;
return method_getTypeEncoding(method);
}
#if !defined(OF_APPLE_RUNTIME) || defined(__OBJC2__)
static void
uncaughtExceptionHandler(id exception)
{
OFString *description = [exception description];
OFArray *backtrace = nil;
OFStringEncoding encoding = [OFLocale 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
OFMethodNotFound(id object, SEL selector)
{
[object doesNotRecognizeSelector: selector];
/*
* Just in case doesNotRecognizeSelector: returned, even though it must
* never return.
*/
abort();
OF_UNREACHABLE
}
void OF_NO_RETURN_FUNC
OFMethodNotFound_stret(void *stret, id object, SEL selector)
{
OFMethodNotFound(object, selector);
}
id
OFAllocObject(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 = calloc(1, PRE_IVARS_ALIGN + instanceSize +
extraAlignment + extraSize);
if OF_UNLIKELY (instance == nil) {
allocFailedException.isa = [OFAllocFailedException class];
@throw (id)&allocFailedException;
}
((struct PreIvars *)instance)->retainCount = 1;
#if !defined(OF_HAVE_ATOMIC_OPS) && !defined(OF_AMIGAOS)
if OF_UNLIKELY (OFSpinlockNew(
&((struct PreIvars *)instance)->retainCountSpinlock) != 0) {
free(instance);
@throw [OFInitializationFailedException
exceptionWithClass: class];
}
#endif
instance = (OFObject *)(void *)((char *)instance + PRE_IVARS_ALIGN);
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: [OFLocale 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 *)&OFForward,
(void *)&OFForward_stret);
#else
objc_setForwardHandler((IMP)&OFForward, (IMP)&OFForward_stret);
#endif
objc_setEnumerationMutationHandler(enumerationMutationHandler);
do {
OFHashSeed = OFRandom32();
} while (OFHashSeed == 0);
#ifdef OF_OBJFW_RUNTIME
objc_setTaggedPointerSecret(sizeof(uintptr_t) == 4
? (uintptr_t)OFRandom32() : (uintptr_t)OFRandom64());
#endif
}
+ (void)unload
{
}
+ (void)initialize
{
}
+ (instancetype)alloc
{
return OFAllocObject(self, 0, 0, NULL);
}
+ (instancetype)new
{
return [[self alloc] init];
}
+ (Class)class
{
return self;
}
+ (OFString *)className
{
return [OFString stringWithCString: class_getName(self)
encoding: OFStringEncodingASCII];
}
+ (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);
}
+ (OFMethodSignature *)instanceMethodSignatureForSelector: (SEL)selector
{
const char *typeEncoding = typeEncodingForSelector(self, selector);
if (typeEncoding == NULL)
return nil;
return [OFMethodSignature signatureWithObjCTypes: typeEncoding];
}
+ (OFString *)description
{
return [self className];
}
+ (IMP)replaceClassMethod: (SEL)selector withMethodFromClass: (Class)class
{
IMP method = [class methodForSelector: selector];
if (method == NULL)
@throw [OFInvalidArgumentException exception];
return class_replaceMethod(object_getClass(self), selector, method,
typeEncodingForSelector(object_getClass(class), selector));
}
+ (IMP)replaceInstanceMethod: (SEL)selector withMethodFromClass: (Class)class
{
IMP method = [class instanceMethodForSelector: selector];
if (method == NULL)
@throw [OFInvalidArgumentException exception];
return class_replaceMethod(self, selector, method,
typeEncodingForSelector(class, selector));
}
+ (void)inheritMethodsFromClass: (Class)class
{
Class superclass = [self superclass];
Method *methodList;
unsigned int count;
if ([self isSubclassOfClass: class])
return;
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);
}
[self inheritMethodsFromClass: superclass];
}
+ (bool)resolveClassMethod: (SEL)selector
{
return NO;
}
+ (bool)resolveInstanceMethod: (SEL)selector
{
return NO;
}
- (instancetype)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: OFStringEncodingASCII];
}
- (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);
}
- (id)performSelector: (SEL)selector
withObject: (id)object1
withObject: (id)object2
withObject: (id)object3
{
#if defined(OF_OBJFW_RUNTIME)
id (*imp)(id, SEL, id, id, id) =
(id (*)(id, SEL, id, id, id))objc_msg_lookup(self, selector);
#elif defined(OF_APPLE_RUNTIME)
id (*imp)(id, SEL, id, id, id) =
(id (*)(id, SEL, id, id, id))objc_msgSend;
#endif
return imp(self, selector, object1, object2, object3);
}
- (id)performSelector: (SEL)selector
withObject: (id)object1
withObject: (id)object2
withObject: (id)object3
withObject: (id)object4
{
#if defined(OF_OBJFW_RUNTIME)
id (*imp)(id, SEL, id, id, id, id) =
(id (*)(id, SEL, id, id, id, id))objc_msg_lookup(self, selector);
#elif defined(OF_APPLE_RUNTIME)
id (*imp)(id, SEL, id, id, id, id) =
(id (*)(id, SEL, id, id, id, id))objc_msgSend;
#endif
return imp(self, selector, object1, object2, object3, object4);
}
- (void)performSelector: (SEL)selector afterDelay: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)delay
{
void *pool = objc_autoreleasePoolPush();
[OFTimer scheduledTimerWithTimeInterval: delay
target: self
selector: selector
object: object1
object: object2
repeats: false];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
withObject: (id)object1
withObject: (id)object2
withObject: (id)object3
afterDelay: (OFTimeInterval)delay
{
void *pool = objc_autoreleasePoolPush();
[OFTimer scheduledTimerWithTimeInterval: delay
target: self
selector: selector
object: object1
object: object2
object: object3
repeats: false];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
withObject: (id)object1
withObject: (id)object2
withObject: (id)object3
withObject: (id)object4
afterDelay: (OFTimeInterval)delay
{
void *pool = objc_autoreleasePoolPush();
[OFTimer scheduledTimerWithTimeInterval: delay
target: self
selector: selector
object: object1
object: object2
object: object3
object: object4
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)performSelector: (SEL)selector
onThread: (OFThread *)thread
withObject: (id)object1
withObject: (id)object2
withObject: (id)object3
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
object: object1
object: object2
object: object3
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
withObject: (id)object3
withObject: (id)object4
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
object: object1
object: object2
object: object3
object: object4
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)performSelectorOnMainThread: (SEL)selector
withObject: (id)object1
withObject: (id)object2
withObject: (id)object3
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
object: object1
object: object2
object: object3
repeats: false];
[[OFRunLoop mainRunLoop] addTimer: timer];
if (waitUntilDone)
[timer waitUntilDone];
objc_autoreleasePoolPop(pool);
}
- (void)performSelectorOnMainThread: (SEL)selector
withObject: (id)object1
withObject: (id)object2
withObject: (id)object3
withObject: (id)object4
waitUntilDone: (bool)waitUntilDone
{
void *pool = objc_autoreleasePoolPush();
OFTimer *timer = [OFTimer timerWithTimeInterval: 0
target: self
selector: selector
object: object1
object: object2
object: object3
object: object4
repeats: false];
[[OFRunLoop mainRunLoop] addTimer: timer];
if (waitUntilDone)
[timer waitUntilDone];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
onThread: (OFThread *)thread
afterDelay: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)delay
{
void *pool = objc_autoreleasePoolPush();
[thread.runLoop addTimer: [OFTimer timerWithTimeInterval: delay
target: self
selector: selector
object: object1
object: object2
repeats: false]];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
onThread: (OFThread *)thread
withObject: (id)object1
withObject: (id)object2
withObject: (id)object3
afterDelay: (OFTimeInterval)delay
{
void *pool = objc_autoreleasePoolPush();
[thread.runLoop addTimer: [OFTimer timerWithTimeInterval: delay
target: self
selector: selector
object: object1
object: object2
object: object3
repeats: false]];
objc_autoreleasePoolPop(pool);
}
- (void)performSelector: (SEL)selector
onThread: (OFThread *)thread
withObject: (id)object1
withObject: (id)object2
withObject: (id)object3
withObject: (id)object4
afterDelay: (OFTimeInterval)delay
{
void *pool = objc_autoreleasePoolPush();
[thread.runLoop addTimer: [OFTimer timerWithTimeInterval: delay
target: self
selector: selector
object: object1
object: object2
object: object3
object: object4
repeats: false]];
objc_autoreleasePoolPop(pool);
}
#endif
- (OFMethodSignature *)methodSignatureForSelector: (SEL)selector
{
const char *typeEncoding =
typeEncodingForSelector(object_getClass(self), selector);
if (typeEncoding == NULL)
return nil;
return [OFMethodSignature signatureWithObjCTypes: typeEncoding];
}
- (bool)isEqual: (id)object
{
return (object == self);
}
- (unsigned long)hash
{
uintptr_t ptr = (uintptr_t)self;
unsigned long hash;
OFHashInit(&hash);
for (size_t i = 0; i < sizeof(ptr); i++) {
OFHashAdd(&hash, ptr & 0xFF);
ptr >>= 8;
}
OFHashFinalize(&hash);
return hash;
}
- (OFString *)description
{
/* Classes containing data should reimplement this! */
return [OFString stringWithFormat: @"<%@>", self.className];
}
- (id)forwardingTargetForSelector: (SEL)selector
{
return nil;
}
- (void)doesNotRecognizeSelector: (SEL)selector
{
@throw [OFNotImplementedException exceptionWithSelector: selector
object: self];
}
- (instancetype)retain
{
#if defined(OF_HAVE_ATOMIC_OPS)
OFAtomicIntIncrease(&PRE_IVARS->retainCount);
#elif defined(OF_AMIGAOS)
/*
* On AmigaOS, we can only have one CPU. As increasing a variable is a
* single instruction on M68K, we don't need Forbid() / Permit() on
* M68K.
*/
# ifndef OF_AMIGAOS_M68K
Forbid();
# endif
PRE_IVARS->retainCount++;
# ifndef OF_AMIGAOS_M68K
Permit();
# endif
#else
OFEnsure(OFSpinlockLock(&PRE_IVARS->retainCountSpinlock) == 0);
PRE_IVARS->retainCount++;
OFEnsure(OFSpinlockUnlock(&PRE_IVARS->retainCountSpinlock) == 0);
#endif
return self;
}
- (unsigned int)retainCount
{
assert(PRE_IVARS->retainCount >= 0);
return PRE_IVARS->retainCount;
}
- (void)release
{
#if defined(OF_HAVE_ATOMIC_OPS)
OFReleaseMemoryBarrier();
if (OFAtomicIntDecrease(&PRE_IVARS->retainCount) <= 0) {
OFAcquireMemoryBarrier();
[self dealloc];
}
#elif defined(OF_AMIGAOS)
int retainCount;
Forbid();
retainCount = --PRE_IVARS->retainCount;
Permit();
if (retainCount == 0)
[self dealloc];
#else
int retainCount;
OFEnsure(OFSpinlockLock(&PRE_IVARS->retainCountSpinlock) == 0);
retainCount = --PRE_IVARS->retainCount;
OFEnsure(OFSpinlockUnlock(&PRE_IVARS->retainCountSpinlock) == 0);
if (retainCount == 0)
[self dealloc];
#endif
}
- (instancetype)autorelease
{
return _objc_rootAutorelease(self);
}
- (instancetype)self
{
return self;
}
- (bool)isProxy
{
return false;
}
- (bool)allowsWeakReference
{
return true;
}
- (bool)retainWeakReference
{
[self retain];
return true;
}
- (void)dealloc
{
objc_destructInstance(self);
free((char *)self - PRE_IVARS_ALIGN);
}
/* Required to use properties with the Apple runtime */
- (id)copyWithZone: (void *)zone
{
if OF_UNLIKELY (zone != NULL) {
[self doesNotRecognizeSelector: _cmd];
abort();
}
return [(id)self copy];
}
- (id)mutableCopyWithZone: (void *)zone
{
if OF_UNLIKELY (zone != NULL) {
[self doesNotRecognizeSelector: _cmd];
abort();
}
return [(id)self mutableCopy];
}
/*
* The following 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.
*/
+ (id)retain
{
return self;
}
+ (id)autorelease
{
return self;
}
+ (unsigned int)retainCount
{
return OFMaxRetainCount;
}
+ (void)release
{
}
+ (void)dealloc
{
OF_UNRECOGNIZED_SELECTOR
}
+ (id)copy
{
return self;
}
+ (id)mutableCopyWithZone: (void *)zone
{
OF_UNRECOGNIZED_SELECTOR
}
/* Required to use ObjFW from Swift */
+ (instancetype)allocWithZone: (void *)zone
{
if OF_UNLIKELY (zone != NULL) {
[self doesNotRecognizeSelector: _cmd];
abort();
}
return [self alloc];
}
@end