ObjFW  Artifact [89cb21ae56]

Artifact 89cb21ae5631072f968cb5058cde9f9cc76b9e19ac7f6ed58c034784b5b7cf56:

• File src/OFObject.h — part of check-in [c1fe4b2b77] at 2020-07-12 09:49:35 on branch trunk — Make of_random() a function

  When arc4random() is unavailable, either random() or rand() is used and
  both need to be seeded. If of_random() is a macro, it needs to be
  (re)seeded every time, as it's unknown whether it has already been
  seeded. As it is seeded with gettimeofday() due to the lack of a better
  initial seed, this means every call returns the first state for the
  current time, which is very predictable. random() and rand() are both
  not cryptographic, but this should at least make it a little bit better
  now. (user: js, size: 39571) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
 *               2018, 2019, 2020
 *   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.
 */

#ifndef OBJFW_OF_OBJECT_H
#define OBJFW_OF_OBJECT_H

#include "objfw-defs.h"

#ifndef __STDC_LIMIT_MACROS
# define __STDC_LIMIT_MACROS
#endif
#ifndef __STDC_CONSTANT_MACROS
# define __STDC_CONSTANT_MACROS
#endif

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include <limits.h>

#include "block.h"
#include "macros.h"
#include "once.h"

/*
 * Some versions of MinGW require <winsock2.h> to be included before
 * <windows.h>. Do this here to make sure this is always done in the correct
 * order, even if another header includes just <windows.h>.
 */
#ifdef __MINGW32__
# include <_mingw.h>
# ifdef __MINGW64_VERSION_MAJOR
#  include <winsock2.h>
#  include <windows.h>
# endif
#endif

OF_ASSUME_NONNULL_BEGIN

/*! @file */

/*!
 * @brief A result of a comparison.
 */
typedef enum {
	/*! The left object is smaller than the right */
	OF_ORDERED_ASCENDING = -1,
	/*! Both objects are equal */
	OF_ORDERED_SAME = 0,
	/*! The left object is bigger than the right */
	OF_ORDERED_DESCENDING = 1
} of_comparison_result_t;

#ifdef OF_HAVE_BLOCKS
/*!
 * @brief A comparator to compare two objects.
 *
 * @param left The left object
 * @param right The right object
 * @return The order of the objects
 */
typedef of_comparison_result_t (^of_comparator_t)(id _Nonnull left,
    id _Nonnull right);
#endif

/*!
 * @brief An enum for storing endianess.
 */
typedef enum {
	/*! Most significant byte first (big endian) */
	OF_BYTE_ORDER_BIG_ENDIAN,
	/*! Least significant byte first (little endian) */
	OF_BYTE_ORDER_LITTLE_ENDIAN
} of_byte_order_t;

/*!
 * @struct of_range_t OFObject.h ObjFW/OFObject.h
 *
 * @brief A range.
 */
struct OF_BOXABLE of_range_t {
	/*! The start of the range */
	size_t location;
	/*! The length of the range */
	size_t length;
};
typedef struct of_range_t of_range_t;

/*!
 * @brief Creates a new of_range_t.
 *
 * @param start The starting index of the range
 * @param length The length of the range
 * @return An of_range with the specified start and length
 */
static OF_INLINE of_range_t OF_CONST_FUNC
of_range(size_t start, size_t length)
{
	of_range_t range = { start, length };

	return range;
}

/*!
 * @brief Returns whether the two ranges are equal.
 *
 * @param range1 The first range for the comparison
 * @param range2 The second range for the comparison
 * @return Whether the two ranges are equal
 */
static OF_INLINE bool
of_range_equal(of_range_t range1, of_range_t range2)
{
	if (range1.location != range2.location)
		return false;

	if (range1.length != range2.length)
		return false;

	return true;
}

/*!
 * @brief A time interval in seconds.
 */
typedef double of_time_interval_t;

/*!
 * @struct of_point_t OFObject.h ObjFW/OFObject.h
 *
 * @brief A point.
 */
struct OF_BOXABLE of_point_t {
	/*! The x coordinate of the point */
	float x;
	/*! The y coordinate of the point */
	float y;
};
typedef struct of_point_t of_point_t;

/*!
 * @brief Creates a new of_point_t.
 *
 * @param x The x coordinate of the point
 * @param y The x coordinate of the point
 * @return An of_point_t with the specified coordinates
 */
static OF_INLINE of_point_t OF_CONST_FUNC
of_point(float x, float y)
{
	of_point_t point = { x, y };

	return point;
}

/*!
 * @brief Returns whether the two points are equal.
 *
 * @param point1 The first point for the comparison
 * @param point2 The second point for the comparison
 * @return Whether the two points are equal
 */
static OF_INLINE bool
of_point_equal(of_point_t point1, of_point_t point2)
{
	if (point1.x != point2.x)
		return false;

	if (point1.y != point2.y)
		return false;

	return true;
}

/*!
 * @struct of_dimension_t OFObject.h ObjFW/OFObject.h
 *
 * @brief A dimension.
 */
struct OF_BOXABLE of_dimension_t {
	/*! The width of the dimension */
	float width;
	/*! The height of the dimension */
	float height;
};
typedef struct of_dimension_t of_dimension_t;

/*!
 * @brief Creates a new of_dimension_t.
 *
 * @param width The width of the dimension
 * @param height The height of the dimension
 * @return An of_dimension_t with the specified width and height
 */
static OF_INLINE of_dimension_t OF_CONST_FUNC
of_dimension(float width, float height)
{
	of_dimension_t dimension = { width, height };

	return dimension;
}

/*!
 * @brief Returns whether the two dimensions are equal.
 *
 * @param dimension1 The first dimension for the comparison
 * @param dimension2 The second dimension for the comparison
 * @return Whether the two dimensions are equal
 */
static OF_INLINE bool
of_dimension_equal(of_dimension_t dimension1, of_dimension_t dimension2)
{
	if (dimension1.width != dimension2.width)
		return false;

	if (dimension1.height != dimension2.height)
		return false;

	return true;
}

/*!
 * @struct of_rectangle_t OFObject.h ObjFW/OFObject.h
 *
 * @brief A rectangle.
 */
struct OF_BOXABLE of_rectangle_t {
	/*! The point from where the rectangle originates */
	of_point_t origin;
	/*! The size of the rectangle */
	of_dimension_t size;
};
typedef struct of_rectangle_t of_rectangle_t;

/*!
 * @brief Creates a new of_rectangle_t.
 *
 * @param x The x coordinate of the top left corner of the rectangle
 * @param y The y coordinate of the top left corner of the rectangle
 * @param width The width of the rectangle
 * @param height The height of the rectangle
 * @return An of_rectangle_t with the specified origin and size
 */
static OF_INLINE of_rectangle_t OF_CONST_FUNC
of_rectangle(float x, float y, float width, float height)
{
	of_rectangle_t rectangle = {
		of_point(x, y),
		of_dimension(width, height)
	};

	return rectangle;
}

/*!
 * @brief Returns whether the two rectangles are equal.
 *
 * @param rectangle1 The first rectangle for the comparison
 * @param rectangle2 The second rectangle for the comparison
 * @return Whether the two rectangles are equal
 */
static OF_INLINE bool
of_rectangle_equal(of_rectangle_t rectangle1, of_rectangle_t rectangle2)
{
	if (!of_point_equal(rectangle1.origin, rectangle2.origin))
		return false;

	if (!of_dimension_equal(rectangle1.size, rectangle2.size))
		return false;

	return true;
}

#ifdef __OBJC__
@class OFMethodSignature;
@class OFString;
@class OFThread;

/*!
 * @protocol OFObject OFObject.h ObjFW/OFObject.h
 *
 * @brief The protocol which all root classes implement.
 */
@protocol OFObject
/*!
 * @brief The class of the object.
 */
# ifndef __cplusplus
@property (readonly, nonatomic) Class class;
# else
@property (readonly, nonatomic, getter=class) Class class_;
# endif

/*!
 * @brief The superclass of the object.
 */
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) Class superclass;

/*!
 * @brief A 32 bit hash for the object.
 *
 * Classes containing data (like strings, arrays, lists etc.) should reimplement
 * this!
 *
 * @warning If you reimplement this, you also need to reimplement @ref isEqual:
 *	    to behave in a way compatible to your reimplementation of this
 *	    method!
 */
@property (readonly, nonatomic) uint32_t hash;

/*!
 * @brief The retain count.
 */
@property (readonly, nonatomic) unsigned int retainCount;

/*!
 * @brief Whether the object is a proxy object.
 */
@property (readonly, nonatomic) bool isProxy;

/*!
 * @brief Whether the object allows weak references.
 */
@property (readonly, nonatomic) bool allowsWeakReference;

/*!
 * @brief Returns a boolean whether the object of the specified kind.
 *
 * @param class_ The class whose kind is checked
 * @return A boolean whether the object is of the specified kind
 */
- (bool)isKindOfClass: (Class)class_;

/*!
 * @brief Returns a boolean whether the object is a member of the specified
 *	  class.
 *
 * @param class_ The class for which the receiver is checked
 * @return A boolean whether the object is a member of the specified class
 */
- (bool)isMemberOfClass: (Class)class_;

/*!
 * @brief Returns a boolean whether the object responds to the specified
 *	  selector.
 *
 * @param selector The selector which should be checked for respondence
 * @return A boolean whether the objects responds to the specified selector
 */
- (bool)respondsToSelector: (SEL)selector;

/*!
 * @brief Checks whether the object conforms to the specified protocol.
 *
 * @param protocol The protocol which should be checked for conformance
 * @return A boolean whether the object conforms to the specified protocol
 */
- (bool)conformsToProtocol: (Protocol *)protocol;

/*!
 * @brief Returns the implementation for the specified selector.
 *
 * @param selector The selector for which the method should be returned
 * @return The implementation for the specified selector
 */
- (nullable IMP)methodForSelector: (SEL)selector;

/*!
 * @brief Performs the specified selector.
 *
 * @param selector The selector to perform
 * @return The object returned by the method specified by the selector
 */
- (nullable id)performSelector: (SEL)selector;

/*!
 * @brief Performs the specified selector with the specified object.
 *
 * @param selector The selector to perform
 * @param object The object that is passed to the method specified by the
 *		 selector
 * @return The object returned by the method specified by the selector
 */
- (nullable id)performSelector: (SEL)selector
		    withObject: (nullable id)object;

/*!
 * @brief Performs the specified selector with the specified objects.
 *
 * @param selector The selector to perform
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @return The object returned by the method specified by the selector
 */
- (nullable id)performSelector: (SEL)selector
		    withObject: (nullable id)object1
		    withObject: (nullable id)object2;

/*!
 * @brief Performs the specified selector with the specified objects.
 *
 * @param selector The selector to perform
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @return The object returned by the method specified by the selector
 */
- (nullable id)performSelector: (SEL)selector
		    withObject: (nullable id)object1
		    withObject: (nullable id)object2
		    withObject: (nullable id)object3;

/*!
 * @brief Performs the specified selector with the specified objects.
 *
 * @param selector The selector to perform
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @param object4 The fourth object that is passed to the method specified by
 *		  the selector
 * @return The object returned by the method specified by the selector
 */
- (nullable id)performSelector: (SEL)selector
		    withObject: (nullable id)object1
		    withObject: (nullable id)object2
		    withObject: (nullable id)object3
		    withObject: (nullable id)object4;

/*!
 * @brief Checks two objects for equality.
 *
 * Classes containing data (like strings, arrays, lists etc.) should reimplement
 * this!
 *
 * @warning If you reimplement this, you also need to reimplement @ref hash to
 *	    return the same hash for objects which are equal!
 *
 * @param object The object which should be tested for equality
 * @return A boolean whether the object is equal to the specified object
 */
- (bool)isEqual: (nullable id)object;

/*!
 * @brief Increases the retain count.
 *
 * Each time an object is released, the retain count gets decreased and the
 * object deallocated if it reaches 0.
 */
- (instancetype)retain;

/*!
 * @brief Decreases the retain count.
 *
 * Each time an object is released, the retain count gets decreased and the
 * object deallocated if it reaches 0.
 */
- (void)release;

/*!
 * @brief Adds the object to the topmost autorelease pool of the thread's
 *	  autorelease pool stack.
 *
 * @return The object
 */
- (instancetype)autorelease;

/*!
 * @brief Returns the receiver.
 *
 * @return The receiver
 */
- (instancetype)self;

/*!
 * @brief Retain a weak reference to this object.
 *
 * @return Whether a weak reference to this object has been retained
 */
- (bool)retainWeakReference;
@end
#endif

/*!
 * @class OFObject OFObject.h ObjFW/OFObject.h
 *
 * @brief The root class for all other classes inside ObjFW.
 */
#ifdef __OBJC__
OF_ROOT_CLASS
@interface OFObject <OFObject>
{
@private
# ifndef __clang_analyzer__
	Class _isa;
# else
	Class _isa __attribute__((__unused__));
# endif
}

# ifdef OF_HAVE_CLASS_PROPERTIES
#  ifndef __cplusplus
@property (class, readonly, nonatomic) Class class;
#  else
@property (class, readonly, nonatomic, getter=class) Class class_;
#  endif
@property (class, readonly, nonatomic) OFString *className;
@property (class, readonly, nullable, nonatomic) Class superclass;
@property (class, readonly, nonatomic) OFString *description;
# endif

/*!
 * @brief The name of the object's class.
 */
@property (readonly, nonatomic) OFString *className;

/*!
 * @brief A description for the object.
 *
 * This is used when the object is used in a format string and for debugging
 * purposes.
 */
@property (readonly, nonatomic) OFString *description;

/*!
 * @brief A method which is called once when the class is loaded into the
 *	  runtime.
 *
 * Derived classes can override this to execute their own code when the class
 * is loaded.
 */
+ (void)load;

/*!
 * @brief A method which is called when the class is unloaded from the runtime.
 *
 * Derived classes can override this to execute their own code when the class
 * is unloaded.
 *
 * @warning This is not supported by the Apple runtime and currently only
 *	    called by the ObjFW runtime when objc_unregister_class() or
 *	    objc_exit() has been called!
 *	    In the future, this might also be called by the ObjFW runtime when
 *	    the class is part of a plugin that has been unloaded.
 */
+ (void)unload;

/*!
 * @brief A method which is called the moment before the first call to the class
 *	  is being made.
 *
 * Derived classes can override this to execute their own code on
 * initialization. They should make sure to not execute any code if self is not
 * the class itself, as it might happen that the method was called for a
 * subclass which did not override this method.
 */
+ (void)initialize;

/*!
 * @brief Allocates memory for an instance of the class and sets up the memory
 *	  pool for the object.
 *
 * This method will never return `nil`, instead, it will throw an
 * @ref OFAllocFailedException.
 *
 * @return The allocated object
 */
+ (instancetype)alloc;

/*!
 * @brief Calls @ref alloc on `self` and then `init` on the returned object.
 *
 * @return An allocated and initialized object
 */
+ (instancetype)new;

/*!
 * @brief Returns the class.
 *
 * @return The class
 */
+ (Class)class;

/*!
 * @brief Returns the name of the class as a string.
 *
 * @return The name of the class as a string
 */
+ (OFString *)className;

/*!
 * @brief Returns a boolean whether the class is a subclass of the specified
 *	  class.
 *
 * @param class_ The class which is checked for being a superclass
 * @return A boolean whether the class is a subclass of the specified class
 */
+ (bool)isSubclassOfClass: (Class)class_;

/*!
 * @brief Returns the superclass of the class.
 *
 * @return The superclass of the class
 */
+ (nullable Class)superclass;

/*!
 * @brief Checks whether instances of the class respond to a given selector.
 *
 * @param selector The selector which should be checked for respondence
 * @return A boolean whether instances of the class respond to the specified
 *	   selector
 */
+ (bool)instancesRespondToSelector: (SEL)selector;

/*!
 * @brief Checks whether the class conforms to a given protocol.
 *
 * @param protocol The protocol which should be checked for conformance
 * @return A boolean whether the class conforms to the specified protocol
 */
+ (bool)conformsToProtocol: (Protocol *)protocol;

/*!
 * @brief Returns the implementation of the instance method for the specified
 *	  selector.
 *
 * @param selector The selector for which the method should be returned
 * @return The implementation of the instance method for the specified selector
 *	   or `nil` if it isn't implemented
 */
+ (nullable IMP)instanceMethodForSelector: (SEL)selector;

/*!
 * @brief Returns the method signature of the instance method for the specified
 *	  selector.
 *
 * @param selector The selector for which the method signature should be
 *		   returned
 * @return The method signature of the instance method for the specified
 *	   selector
 */
+ (nullable OFMethodSignature *)
    instanceMethodSignatureForSelector: (SEL)selector;

/*!
 * @brief Returns a description for the class, which is usually the class name.
 *
 * This is mostly for debugging purposes.
 *
 * @return A description for the class, which is usually the class name
 */
+ (OFString *)description;

/*!
 * @brief Replaces a class method with a class method from another class.
 *
 * @param selector The selector of the class method to replace
 * @param class_ The class from which the new class method should be taken
 * @return The old implementation
 */
+ (nullable IMP)replaceClassMethod: (SEL)selector
	       withMethodFromClass: (Class)class_;

/*!
 * @brief Replaces an instance method with an instance method from another
 *	  class.
 *
 * @param selector The selector of the instance method to replace
 * @param class_ The class from which the new instance method should be taken
 * @return The old implementation
 */
+ (nullable IMP)replaceInstanceMethod: (SEL)selector
		  withMethodFromClass: (Class)class_;

/*!
 * @brief Adds all methods from the specified class to the class that is the
 *	  receiver.
 *
 * Methods implemented by the receiving class itself will not be overridden,
 * however methods implemented by its superclass will. Therefore it behaves
 * similar as if the specified class is the superclass of the receiver.
 *
 * All methods from the superclasses of the specified class will also be added.
 *
 * If the specified class is a superclass of the receiving class, nothing is
 * done.
 *
 * The methods which will be added from the specified class are not allowed to
 * use super or access instance variables, instead they have to use accessors.
 *
 * @param class_ The class from which the instance methods should be inherited
 */
+ (void)inheritMethodsFromClass: (Class)class_;

/*!
 * @brief Try to resolve the specified class method.
 *
 * This method is called if a class method was not found, so that an
 * implementation can be provided at runtime.
 *
 * @return Whether the method has been added to the class
 */
+ (bool)resolveClassMethod: (SEL)selector;

/*!
 * @brief Try to resolve the specified instance method.
 *
 * This method is called if an instance method was not found, so that an
 * implementation can be provided at runtime.
 *
 * @return Whether the method has been added to the class
 */
+ (bool)resolveInstanceMethod: (SEL)selector;

/*!
 * @brief Returns the class.
 *
 * This method exists so that classes can be used in collections requiring
 * conformance to the OFCopying protocol.
 *
 * @return The class of the object
 */
+ (id)copy;

/*!
 * @brief Initializes an already allocated object.
 *
 * Derived classes may override this, but need to use the following pattern:
 * @code
 * self = [super init];
 *
 * @try {
 *         // Custom initialization code goes here.
 * } @catch (id e) {
 *         [self release];
 *         @throw e;
 * }
 *
 * return self;
 * @endcode
 *
 * With ARC enabled, the following pattern needs to be used instead:
 * @code
 * self = [super init];
 *
 * // Custom initialization code goes here.
 *
 * return self;
 * @endcode
 *
 * @ref init may never return `nil`, instead an exception (for example
 * @ref OFInitializationFailedException) should be thrown.
 *
 * @return An initialized object
 */
- (instancetype)init;

/*!
 * @brief Returns the method signature for the specified selector.
 *
 * @param selector The selector for which the method signature should be
 *		   returned
 * @return The method signature for the specified selector
 */
- (nullable OFMethodSignature *)methodSignatureForSelector: (SEL)selector;

/*!
 * @brief Allocates memory and stores it in the object's memory pool.
 *
 * It will be free'd automatically when the object is deallocated.
 *
 * @param size The size of the memory to allocate
 * @return A pointer to the allocated memory. May return NULL if the specified
 *	   size is 0.
 */
- (nullable void *)allocMemoryWithSize: (size_t)size OF_WARN_UNUSED_RESULT;

/*!
 * @brief Allocates memory for the specified number of items and stores it in
 *	  the object's memory pool.
 *
 * It will be free'd automatically when the object is deallocated.
 *
 * @param size The size of each item to allocate
 * @param count The number of items to allocate
 * @return A pointer to the allocated memory. May return NULL if the specified
 *	   size or count is 0.
 */
- (nullable void *)allocMemoryWithSize: (size_t)size
				 count: (size_t)count OF_WARN_UNUSED_RESULT;

/*!
 * @brief Allocates memory, initializes it with zeros and stores it in the
 *	  object's memory pool.
 *
 * It will be free'd automatically when the object is deallocated.
 *
 * @param size The size of the memory to allocate
 * @return A pointer to the allocated memory. May return NULL if the specified
 *	   size is 0.
 */
- (nullable void *)allocZeroedMemoryWithSize: (size_t)size
    OF_WARN_UNUSED_RESULT;

/*!
 * @brief Allocates memory for the specified number of items, initializes it
 *	  with zeros and stores it in the object's memory pool.
 *
 * It will be free'd automatically when the object is deallocated.
 *
 * @param size The size of each item to allocate
 * @param count The number of items to allocate
 * @return A pointer to the allocated memory. May return NULL if the specified
 *	   size or count is 0.
 */
- (nullable void *)allocZeroedMemoryWithSize: (size_t)size
				       count: (size_t)count
    OF_WARN_UNUSED_RESULT;

/*!
 * @brief Resizes memory in the object's memory pool to the specified size.
 *
 * If the pointer is NULL, this is equivalent to allocating memory.
 * If the size is 0, this is equivalent to freeing memory.
 *
 * @param pointer A pointer to the already allocated memory
 * @param size The new size for the memory chunk
 * @return A pointer to the resized memory chunk
 */
- (nullable void *)resizeMemory: (nullable void *)pointer
			   size: (size_t)size OF_WARN_UNUSED_RESULT;

/*!
 * @brief Resizes memory in the object's memory pool to the specific number of
 *	  items of the specified size.
 *
 * If the pointer is NULL, this is equivalent to allocating memory.
 * If the size or number of items is 0, this is equivalent to freeing memory.
 *
 * @param pointer A pointer to the already allocated memory
 * @param size The size of each item to resize to
 * @param count The number of items to resize to
 * @return A pointer to the resized memory chunk
 */
- (nullable void *)resizeMemory: (nullable void *)pointer
			   size: (size_t)size
			  count: (size_t)count OF_WARN_UNUSED_RESULT;

/*!
 * @brief Frees allocated memory and removes it from the object's memory pool.
 *
 * Does nothing if the pointer is NULL.
 *
 * @param pointer A pointer to the allocated memory
 */
- (void)freeMemory: (nullable void *)pointer;

/*!
 * @brief Deallocates the object.
 *
 * It is automatically called when the retain count reaches zero.
 *
 * This also frees all memory in its memory pool.
 */
- (void)dealloc;

/*!
 * @brief Performs the specified selector after the specified delay.
 *
 * @param selector The selector to perform
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	     afterDelay: (of_time_interval_t)delay;

/*!
 * @brief Performs the specified selector with the specified object after the
 *	  specified delay.
 *
 * @param selector The selector to perform
 * @param object The object that is passed to the method specified by the
 *		 selector
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	     withObject: (nullable id)object
	     afterDelay: (of_time_interval_t)delay;

/*!
 * @brief Performs the specified selector with the specified objects after the
 *	  specified delay.
 *
 * @param selector The selector to perform
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	     withObject: (nullable id)object1
	     withObject: (nullable id)object2
	     afterDelay: (of_time_interval_t)delay;

/*!
 * @brief Performs the specified selector with the specified objects after the
 *	  specified delay.
 *
 * @param selector The selector to perform
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	     withObject: (nullable id)object1
	     withObject: (nullable id)object2
	     withObject: (nullable id)object3
	     afterDelay: (of_time_interval_t)delay;

/*!
 * @brief Performs the specified selector with the specified objects after the
 *	  specified delay.
 *
 * @param selector The selector to perform
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @param object4 The fourth object that is passed to the method specified by
 *		  the selector
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	     withObject: (nullable id)object1
	     withObject: (nullable id)object2
	     withObject: (nullable id)object3
	     withObject: (nullable id)object4
	     afterDelay: (of_time_interval_t)delay;

# ifdef OF_HAVE_THREADS
/*!
 * @brief Performs the specified selector on the specified thread.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	  waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the specified thread with the
 *	  specified object.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param object The object that is passed to the method specified by the
 *		 selector
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	     withObject: (nullable id)object
	  waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the specified thread with the
 *	  specified objects.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	     withObject: (nullable id)object1
	     withObject: (nullable id)object2
	  waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the specified thread with the
 *	  specified objects.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	     withObject: (nullable id)object1
	     withObject: (nullable id)object2
	     withObject: (nullable id)object3
	  waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the specified thread with the
 *	  specified objects.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @param object4 The fourth object that is passed to the method specified by
 *		  the selector
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	     withObject: (nullable id)object1
	     withObject: (nullable id)object2
	     withObject: (nullable id)object3
	     withObject: (nullable id)object4
	  waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the main thread.
 *
 * @param selector The selector to perform
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelectorOnMainThread: (SEL)selector
		      waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the main thread with the specified
 *	  object.
 *
 * @param selector The selector to perform
 * @param object The object that is passed to the method specified by the
 *		 selector
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelectorOnMainThread: (SEL)selector
			 withObject: (nullable id)object
		      waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the main thread with the specified
 *	  objects.
 *
 * @param selector The selector to perform
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelectorOnMainThread: (SEL)selector
			 withObject: (nullable id)object1
			 withObject: (nullable id)object2
		      waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the main thread with the specified
 *	  objects.
 *
 * @param selector The selector to perform
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelectorOnMainThread: (SEL)selector
			 withObject: (nullable id)object1
			 withObject: (nullable id)object2
			 withObject: (nullable id)object3
		      waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the main thread with the specified
 *	  objects.
 *
 * @param selector The selector to perform
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @param object4 The fourth object that is passed to the method specified by
 *		  the selector
 * @param waitUntilDone Whether to wait until the perform finished
 */
- (void)performSelectorOnMainThread: (SEL)selector
			 withObject: (nullable id)object1
			 withObject: (nullable id)object2
			 withObject: (nullable id)object3
			 withObject: (nullable id)object4
		      waitUntilDone: (bool)waitUntilDone;

/*!
 * @brief Performs the specified selector on the specified thread after the
 *	  specified delay.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	     afterDelay: (of_time_interval_t)delay;

/*!
 * @brief Performs the specified selector on the specified thread with the
 *	  specified object after the specified delay.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param object The object that is passed to the method specified by the
 *		 selector
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	     withObject: (nullable id)object
	     afterDelay: (of_time_interval_t)delay;

/*!
 * @brief Performs the specified selector on the specified thread with the
 *	  specified objects after the specified delay.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	     withObject: (nullable id)object1
	     withObject: (nullable id)object2
	     afterDelay: (of_time_interval_t)delay;

/*!
 * @brief Performs the specified selector on the specified thread with the
 *	  specified objects after the specified delay.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	     withObject: (nullable id)object1
	     withObject: (nullable id)object2
	     withObject: (nullable id)object3
	     afterDelay: (of_time_interval_t)delay;

/*!
 * @brief Performs the specified selector on the specified thread with the
 *	  specified objects after the specified delay.
 *
 * @param selector The selector to perform
 * @param thread The thread on which to perform the selector
 * @param object1 The first object that is passed to the method specified by the
 *		  selector
 * @param object2 The second object that is passed to the method specified by
 *		  the selector
 * @param object3 The third object that is passed to the method specified by the
 *		  selector
 * @param object4 The fourth object that is passed to the method specified by
 *		  the selector
 * @param delay The delay after which the selector will be performed
 */
- (void)performSelector: (SEL)selector
	       onThread: (OFThread *)thread
	     withObject: (nullable id)object1
	     withObject: (nullable id)object2
	     withObject: (nullable id)object3
	     withObject: (nullable id)object4
	     afterDelay: (of_time_interval_t)delay;
# endif

/*!
 * @brief This method is called when @ref resolveClassMethod: or
 *	  @ref resolveInstanceMethod: returned false. It should return a target
 *	  to which the message should be forwarded.
 *
 * @note When the message should not be forwarded, you should not return `nil`,
 *	 but instead return the result of `[super
 *	 forwardingTargetForSelector: selector]`.
 *
 * @return The target to forward the message to
 */
- (nullable id)forwardingTargetForSelector: (SEL)selector;

/*!
 * @brief Handles messages which are not understood by the receiver.
 *
 * @warning If you override this method, you must make sure that it never
 *	    returns!
 *
 * @param selector The selector not understood by the receiver
 */
- (void)doesNotRecognizeSelector: (SEL)selector OF_NO_RETURN;
@end
#else
typedef void OFObject;
#endif

#ifdef __OBJC__
/*!
 * @protocol OFCopying OFObject.h ObjFW/OFObject.h
 *
 * @brief A protocol for the creation of copies.
 */
@protocol OFCopying
/*!
 * @brief Copies the object.
 *
 * For classes which can be immutable or mutable, this returns an immutable
 * copy. If only a mutable version of the class exists, it creates a mutable
 * copy.
 *
 * @return A copy of the object
 */
- (id)copy;
@end

/*!
 * @protocol OFMutableCopying OFObject.h ObjFW/OFObject.h
 *
 * @brief A protocol for the creation of mutable copies.
 *
 * This protocol is implemented by objects that can be mutable and immutable
 * and allows returning a mutable copy.
 */
@protocol OFMutableCopying
/*!
 * @brief Creates a mutable copy of the object.
 *
 * @return A mutable copy of the object
 */
- (id)mutableCopy;
@end

/*!
 * @protocol OFComparing OFObject.h ObjFW/OFObject.h
 *
 * @brief A protocol for comparing objects.
 *
 * This protocol is implemented by objects that can be compared.
 */
@protocol OFComparing
/*!
 * @brief Compares the object with another object.
 *
 * @param object An object to compare the object to
 * @return The result of the comparison
 */
- (of_comparison_result_t)compare: (id <OFComparing>)object;
@end
#endif

#ifdef __cplusplus
extern "C" {
#endif
#ifdef OF_APPLE_RUNTIME
extern void *_Null_unspecified objc_autoreleasePoolPush(void);
extern void objc_autoreleasePoolPop(void *_Null_unspecified pool);
#endif
extern id of_alloc_object(Class class_, size_t extraSize,
    size_t extraAlignment, void *_Nullable *_Nullable extra);
extern void OF_NO_RETURN_FUNC of_method_not_found(id self, SEL _cmd);
extern uint32_t of_hash_seed;
/* This does *NOT* provide cryptographically secure randomness! */
extern uint32_t of_random(void);
#ifdef __cplusplus
}
#endif

OF_ASSUME_NONNULL_END

#ifdef __OBJC__
# import "OFObject+KeyValueCoding.h"
# import "OFObject+Serialization.h"
#endif

#endif