ObjFW  Artifact [3ddfbc785d]

Artifact 3ddfbc785d1e837fa777a57f48b29b39b9937119f49b02e503f54b0adaa08e21:

• File src/OFObject.h — part of check-in [6ce0093f8d] at 2023-04-10 19:22:32 on branch trunk — Remove OFSerialization

  While the idea sounds nice that the tag name is the class, this means the
  serialization includes whether something is mutable or immutable. This means
  doing as much as making something immutable changes the serialization, which
  can then cause issues after being deserialized. (user: js, size: 43248) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008-2023 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 "macros.h"

#include "OFOnce.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 */
	OFOrderedAscending = -1,
	/** Both objects are equal */
	OFOrderedSame = 0,
	/** The left object is bigger than the right */
	OFOrderedDescending = 1
} OFComparisonResult;

/**
 * @brief A function to compare two objects.
 *
 * @param left The left object
 * @param right The right object
 * @param context Context passed along for comparing
 * @return The order of the objects
 */
typedef OFComparisonResult (*OFCompareFunction)(id _Nonnull left,
    id _Nonnull right, void *_Nullable context);

#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 OFComparisonResult (^OFComparator)(id _Nonnull left, id _Nonnull right);
#endif

/**
 * @brief An enum for representing endianess.
 */
typedef enum {
	/** Most significant byte first (big endian) */
	OFByteOrderBigEndian,
	/** Least significant byte first (little endian) */
	OFByteOrderLittleEndian,
	/** Native byte order of the system */
#ifdef OF_BIG_ENDIAN
	OFByteOrderNative = OFByteOrderBigEndian
#else
	OFByteOrderNative = OFByteOrderLittleEndian
#endif
} OFByteOrder;

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

/**
 * @brief Creates a new OFRange.
 *
 * @param start The starting index of the range
 * @param length The length of the range
 * @return An OFRangeith the specified start and length
 */
static OF_INLINE OFRange OF_CONST_FUNC
OFMakeRange(size_t start, size_t length)
{
	OFRange 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
OFEqualRanges(OFRange range1, OFRange 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 OFTimeInterval;

/**
 * @struct OFPoint OFObject.h ObjFW/OFObject.h
 *
 * @brief A point in 2D space.
 */
typedef struct OF_BOXABLE {
	/** The x coordinate of the point */
	float x;
	/** The y coordinate of the point */
	float y;
} OFPoint;

/**
 * @brief Creates a new OFPoint.
 *
 * @param x The x coordinate of the point
 * @param y The x coordinate of the point
 * @return An OFPoint with the specified coordinates
 */
static OF_INLINE OFPoint OF_CONST_FUNC
OFMakePoint(float x, float y)
{
	OFPoint 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
OFEqualPoints(OFPoint point1, OFPoint point2)
{
	if (point1.x != point2.x)
		return false;

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

	return true;
}

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

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

	return size;
}

/**
 * @brief Returns whether the two sizes are equal.
 *
 * @param size1 The first size for the comparison
 * @param size2 The second size for the comparison
 * @return Whether the two sizes are equal
 */
static OF_INLINE bool
OFEqualSizes(OFSize size1, OFSize size2)
{
	if (size1.width != size2.width)
		return false;

	if (size1.height != size2.height)
		return false;

	return true;
}

/**
 * @struct OFRect OFObject.h ObjFW/OFObject.h
 *
 * @brief A rectangle.
 */
typedef struct OF_BOXABLE {
	/** The point from where the rectangle originates */
	OFPoint origin;
	/** The size of the rectangle */
	OFSize size;
} OFRect;

/**
 * @brief Creates a new OFRect.
 *
 * @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 OFRect with the specified origin and size
 */
static OF_INLINE OFRect OF_CONST_FUNC
OFMakeRect(float x, float y, float width, float height)
{
	OFRect rect = {
		OFMakePoint(x, y),
		OFMakeSize(width, height)
	};

	return rect;
}

/**
 * @brief Returns whether the two rectangles are equal.
 *
 * @param rect1 The first rectangle for the comparison
 * @param rect2 The second rectangle for the comparison
 * @return Whether the two rectangles are equal
 */
static OF_INLINE bool
OFEqualRects(OFRect rect1, OFRect rect2)
{
	if (!OFEqualPoints(rect1.origin, rect2.origin))
		return false;

	if (!OFEqualSizes(rect1.size, rect2.size))
		return false;

	return true;
}

/**
 * @struct OFVector3D OFObject.h ObjFW/OFObject.h
 *
 * @brief A vector in 3D space.
 */
typedef struct OF_BOXABLE {
	/** The x coordinate of the vector */
	float x;
	/** The y coordinate of the vector */
	float y;
	/** The z coordinate of the vector */
	float z;
} OFVector3D;

/**
 * @brief Creates a new OFVector3D.
 *
 * @param x The x coordinate of the vector
 * @param y The x coordinate of the vector
 * @param z The z coordinate of the vector
 * @return An OFVector3D with the specified coordinates
 */
static OF_INLINE OFVector3D OF_CONST_FUNC
OFMakeVector3D(float x, float y, float z)
{
	OFVector3D vector = { x, y, z };

	return vector;
}

/**
 * @brief Returns whether the two vectors are equal.
 *
 * @param vector1 The first vector for the comparison
 * @param vector2 The second vectors for the comparison
 * @return Whether the two vectors are equal
 */
static OF_INLINE bool
OFEqualVectors3D(OFVector3D vector1, OFVector3D vector2)
{
	if (vector1.x != vector2.x)
		return false;

	if (vector1.y != vector2.y)
		return false;

	if (vector1.z != vector2.z)
		return false;

	return true;
}

/**
 * @struct OFVector4D OFObject.h ObjFW/OFObject.h
 *
 * @brief A vector in 4D space.
 */
typedef struct OF_BOXABLE {
	/** The x coordinate of the vector */
	float x;
	/** The y coordinate of the vector */
	float y;
	/** The z coordinate of the vector */
	float z;
	/** The w coordinate of the vector */
	float w;
} OFVector4D;

/**
 * @brief Creates a new OFVector4D.
 *
 * @param x The x coordinate of the vector
 * @param y The x coordinate of the vector
 * @param z The z coordinate of the vector
 * @param w The w coordinate of the vector
 * @return An OFVector4D with the specified coordinates
 */
static OF_INLINE OFVector4D OF_CONST_FUNC
OFMakeVector4D(float x, float y, float z, float w)
{
	OFVector4D vector = { x, y, z, w };

	return vector;
}

/**
 * @brief Returns whether the two vectors are equal.
 *
 * @param vector1 The first vector for the comparison
 * @param vector2 The second vectors for the comparison
 * @return Whether the two vectors are equal
 */
static OF_INLINE bool
OFEqualVectors4D(OFVector4D vector1, OFVector4D vector2)
{
	if (vector1.x != vector2.x)
		return false;

	if (vector1.y != vector2.y)
		return false;

	if (vector1.z != vector2.z)
		return false;

	if (vector1.w != vector2.w)
		return false;

	return true;
}

/**
 * @brief Adds the specified byte to the hash.
 *
 * @param hash A pointer to a hash to add the byte to
 * @param byte The byte to add to the hash
 */
static OF_INLINE void
OFHashAddByte(unsigned long *_Nonnull hash, unsigned char byte)
{
	uint32_t tmp = (uint32_t)*hash;

	tmp += byte;
	tmp += tmp << 10;
	tmp ^= tmp >> 6;

	*hash = tmp;
}

/**
 * @brief Adds the specified hash to the hash.
 *
 * @param hash A pointer to a hash to add the hash to
 * @param otherHash The hash to add to the hash
 */
static OF_INLINE void
OFHashAddHash(unsigned long *_Nonnull hash, unsigned long otherHash)
{
	OFHashAddByte(hash, (otherHash >> 24) & 0xFF);
	OFHashAddByte(hash, (otherHash >> 16) & 0xFF);
	OFHashAddByte(hash, (otherHash >>  8) & 0xFF);
	OFHashAddByte(hash, otherHash & 0xFF);
}

/**
 * @brief Finalizes the specified hash.
 *
 * @param hash A pointer to the hash to finalize
 */
static OF_INLINE void
OFHashFinalize(unsigned long *_Nonnull hash)
{
	uint32_t tmp = (uint32_t)*hash;

	tmp += tmp << 3;
	tmp ^= tmp >> 11;
	tmp += tmp << 15;

	*hash = tmp;
}

static const size_t OFNotFound = SIZE_MAX;

#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 Returns the class of the object.
 *
 * @return The class of the object
 */
- (Class)class;

/**
 * @brief Returns the superclass of the object.
 *
 * @return The superclass of the object
 */
- (nullable Class)superclass;

/**
 * @brief Returns a 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!
 *
 * @return A hash for the object
 */
- (unsigned long)hash;

/**
 * @brief Returns the retain count.
 *
 * @return The retain count
 */
- (unsigned int)retainCount;

/**
 * @brief Returns whether the object is a proxy object.
 *
 * @return Whether the object is a proxy object
 */
- (bool)isProxy;

/**
 * @brief Returns a boolean whether the object is of the specified kind.
 *
 * @param class_ The class for which the receiver 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 Returns whether the object allows a weak reference.
 *
 * @return Whether the object allows a weak references
 */
- (bool)allowsWeakReference;

/**
 * @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

# ifndef __cplusplus
@property (readonly, nonatomic) Class class;
# else
@property (readonly, nonatomic, getter=class) Class class_;
#endif
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) Class superclass;
@property (readonly, nonatomic) unsigned long hash;
@property (readonly, nonatomic) unsigned int retainCount;
@property (readonly, nonatomic) bool isProxy;
@property (readonly, nonatomic) bool allowsWeakReference;

/**
 * @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 @ref objc_deinit has been called!
 *	    In the future, this might also be called by the ObjFW runtime when
 *	    the class is part of a plugin that is being 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`.
 *
 * @return The allocated object
 * @throw OFAllocFailedException There was not enough memory to allocate the
 *				 object
 * @throw OFInitializationFailedException The instance could not be constructed
 */
+ (instancetype)alloc;

/**
 * @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 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: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)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: (OFTimeInterval)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
 * @throw OFNotImplementedException
 */
- (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. Its only method, @ref compare:, should be overridden with a stronger type.
 */
@protocol OFComparing
/**
 * @brief Compares the object to another object.
 *
 * @param object An object to compare the object to
 * @return The result of the comparison
 */
- (OFComparisonResult)compare: (id <OFComparing>)object;
@end
#endif

#ifdef __cplusplus
extern "C" {
#endif
/**
 * @brief Allocates memory for the specified number of items of the specified
 *	  size.
 *
 * To free the allocated memory, use @ref OFFreeMemory.
 *
 * @param count The number of items to allocate
 * @param size The size of each item to allocate
 * @return A pointer to the allocated memory. May return NULL if the specified
 *	   size or count is 0.
 * @throw OFOutOfMemoryException The allocation failed due to not enough memory
 * @throw OFOutOfRangeException The requested `count * size` exceeds the
 *				address space
 */
extern void *_Nullable OFAllocMemory(size_t count, size_t size)
    OF_WARN_UNUSED_RESULT;

/**
 * @brief Allocates memory for the specified number of items of the specified
 *	  size and initializes it with zeros.
 *
 * To free the allocated memory, use @ref OFFreeMemory.
 *
 * @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.
 * @throw OFOutOfMemoryException The allocation failed due to not enough memory
 * @throw OFOutOfRangeException The requested `count * size` exceeds the
 *				address space
 */
extern void *_Nullable OFAllocZeroedMemory(size_t count, size_t size)
    OF_WARN_UNUSED_RESULT;

/**
 * @brief Resizes memory to the specified number of items of the specified size.
 *
 * To free the allocated memory, use @ref OFFreeMemory.
 *
 * 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
 * @throw OFOutOfMemoryException The reallocation failed due to not enough
 *				 memory
 * @throw OFOutOfRangeException The requested `count * size` exceeds the
 *				address space
 */
extern void *_Nullable OFResizeMemory(void *_Nullable pointer, size_t count,
    size_t size) OF_WARN_UNUSED_RESULT;

/**
 * @brief Frees memory allocated by @ref OFAllocMemory, @ref OFAllocZeroedMemory
 *	  or @ref OFResizeMemory.
 *
 * @param pointer A pointer to the memory to free or nil (passing nil ooes
 *		  nothing)
 */
extern void OFFreeMemory(void *_Nullable pointer);

#ifdef OF_APPLE_RUNTIME
extern void *_Null_unspecified objc_autoreleasePoolPush(void);
extern void objc_autoreleasePoolPop(void *_Null_unspecified pool);
# ifndef __OBJC2__
extern id _Nullable objc_constructInstance(Class _Nullable class_,
    void *_Nullable bytes);
extern void *_Nullable objc_destructInstance(id _Nullable object);
# endif
#endif
extern id OFAllocObject(Class class_, size_t extraSize, size_t extraAlignment,
    void *_Nullable *_Nullable extra);
extern void OF_NO_RETURN_FUNC OFMethodNotFound(id self, SEL _cmd);

/**
 * @brief Returns 16 bit or non-cryptographical randomness.
 *
 * @return 16 bit or non-cryptographical randomness
 */
extern uint16_t OFRandom16(void);

/**
 * @brief Returns 32 bit or non-cryptographical randomness.
 *
 * @return 32 bit or non-cryptographical randomness
 */
extern uint32_t OFRandom32(void);

/**
 * @brief Returns 64 bit or non-cryptographical randomness.
 *
 * @return 64 bit or non-cryptographical randomness
 */
extern uint64_t OFRandom64(void);

/**
 * @brief Initializes the specified hash.
 *
 * @param hash A pointer to the hash to initialize
 */
extern void OFHashInit(unsigned long *_Nonnull hash);
#ifdef __cplusplus
}
#endif

OF_ASSUME_NONNULL_END

#include "OFBlock.h"

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

#endif