/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#import "OFObject.h"
#import "OFList.h"
#import "threading.h"
@class OFDate;
#ifdef OF_HAVE_BLOCKS
typedef id (^of_thread_block_t)(id object);
#endif
/**
* \brief A class for Thread Local Storage keys.
*/
@interface OFTLSKey: OFObject
{
@public
of_tlskey_t key;
/* Work around a bug in gcc 4.4.4 (possibly only on Haiku) */
#if !defined(__GNUC__) || __GNUC__ != 4 || __GNUC_MINOR__ != 4 || \
__GNUC_PATCHLEVEL__ != 4
@protected
#endif
void (*destructor)(id);
of_list_object_t *listObject;
BOOL initialized;
}
/**
* \brief Creates a new Thread Local Storage key
*
* \return A new, autoreleased Thread Local Storage key
*/
+ TLSKey;
/**
* \brief Creates a new Thread Local Storage key with the specified destructor.
*
* \param destructor A destructor that is called when the thread is terminated
* \return A new autoreleased Thread Local Storage key
*/
+ TLSKeyWithDestructor: (void(*)(id))destructor;
+ (void)callAllDestructors;
/**
* \brief Initializes an already allocated Thread Local Storage Key with the
* specified destructor.
*
* \param destructor A destructor that is called when the thread is terminated
* \return An initialized Thread Local Storage key
*/
- initWithDestructor: (void(*)(id))destructor;
@end
/**
* \brief A class which provides portable threads.
*
* To use it, you should create a new class derived from it and reimplement
* main.
*/
@interface OFThread: OFObject
{
@public
id object;
of_thread_t thread;
enum {
OF_THREAD_NOT_RUNNING,
OF_THREAD_RUNNING,
OF_THREAD_WAITING_FOR_JOIN
} running;
#ifdef OF_HAVE_BLOCKS
of_thread_block_t block;
#endif
id returnValue;
}
#if defined(OF_HAVE_PROPERTIES) && defined(OF_HAVE_BLOCKS)
@property (retain) of_thread_block_t block;
#endif
/**
* \brief Creates a new thread.
*
* \return A new, autoreleased thread
*/
+ thread;
/**
* \brief Creates a new thread with the specified object.
*
* \param object An object which is passed for use in the main method or nil
* \return A new, autoreleased thread
*/
+ threadWithObject: (id)object;
#ifdef OF_HAVE_BLOCKS
/**
* \brief Creates a new thread with the specified block.
*
* \param block A block which is executed by the thread
* \return A new, autoreleased thread
*/
+ threadWithBlock: (of_thread_block_t)block;
/**
* \brief Creates a new thread with the specified block and object.
*
* \param block A block which is executed by the thread
* \param object An object which is passed for use in the main method or nil
* \return A new, autoreleased thread
*/
+ threadWithBlock: (of_thread_block_t)block
object: (id)object;
#endif
/**
* \brief Sets the Thread Local Storage for the specified key.
*
* The specified object is first retained and then the object stored before is
* released. You can specify nil as object if you want the old object to be
* released and don't want any new object for the TLS key.
*
* \param key The Thread Local Storage key
* \param object The object the Thread Local Storage key will be set to
*/
+ (void)setObject: (id)object
forTLSKey: (OFTLSKey*)key;
/**
* \brief Returns the object for the specified Thread Local Storage key.
*
* The returned object is <i>not</i> retained and autoreleased for performance
* reasons!
*
* \param key The Thread Local Storage key
*/
+ (id)objectForTLSKey: (OFTLSKey*)key;
/**
* \brief Returns the current thread.
*
* \return The current thread or nil if we are in the main thread
*/
+ (OFThread*)currentThread;
/**
* \brief Suspends execution of the current thread for the specified time
* interval.
*
* \param seconds The number of seconds to sleep
*/
+ (void)sleepForTimeInterval: (double)seconds;
/**
* \brief Suspends execution of the current thread until the specified date.
*
* \param date The date to wait for
*/
+ (void)sleepUntilDate: (OFDate*)date;
/**
* \brief Yields a processor voluntarily and moves the thread at the end of the
* queue for its priority.
*/
+ (void)yield;
/**
* \brief Terminates the current thread, letting it return nil.
*/
+ (void)terminate;
/**
* \brief Terminates the current thread, letting it return the specified object.
*
* \param object The object which the terminated thread will return
*/
+ (void)terminateWithObject: (id)object;
/**
* \brief Initializes an already allocated thread with the specified object.
*
* \param object An object which is passed for use in the main method or nil
* \return An initialized OFThread.
*/
- initWithObject: (id)object;
#ifdef OF_HAVE_BLOCKS
/**
* \brief Initializes an already allocated thread with the specified block.
*
* \param block A block which is executed by the thread
* \return An initialized OFThread.
*/
- initWithBlock: (of_thread_block_t)block;
/**
* \brief Initializes an already allocated thread with the specified block and
* object.
*
* \param block A block which is executed by the thread
* \param object An object which is passed for use in the main method or nil
* \return An initialized OFThread.
*/
- initWithBlock: (of_thread_block_t)block
object: (id)object;
#endif
/**
* \brief The main routine of the thread. You need to reimplement this!
*
* It can access the object passed to the threadWithObject or initWithObject
* method using the instance variable named object.
*
* \return The object the join method should return when called for this thread
*/
- (id)main;
/**
* \brief This routine is exectued when the thread's main method has finished
* executing or terminate has been called.
*/
- (void)handleTermination;
/**
* \brief Starts the thread.
*/
- (void)start;
/**
* \brief Joins a thread.
*
* \return The object returned by the main method of the thread.
*/
- (id)join;
@end
/**
* \brief A class for creating mutual exclusions.
*/
@interface OFMutex: OFObject
{
of_mutex_t mutex;
BOOL initialized;
}
/**
* \brief Creates a new mutex.
*
* \return A new autoreleased mutex.
*/
+ mutex;
/**
* \brief Locks the mutex.
*/
- (void)lock;
/**
* \brief Tries to lock the mutex.
*
* \return A boolean whether the mutex could be acquired
*/
- (BOOL)tryLock;
/**
* \brief Unlocks the mutex.
*/
- (void)unlock;
@end
/**
* \brief A class implementing a condition variable for thread synchronization.
*/
@interface OFCondition: OFMutex
{
of_condition_t condition;
BOOL conditionInitialized;
}
/**
* \brief Creates a new condition.
*
* \return A new, autoreleased OFCondition
*/
+ condition;
/**
* \brief Blocks the current thread until another thread calls -[signal] or
* -[broadcast].
*/
- (void)wait;
/**
* \brief Signals the next waiting thread to continue.
*/
- (void)signal;
/**
* \brief Signals all threads to continue.
*/
- (void)broadcast;
@end