ObjFW  Diff

#ifdef OF_HAVE_THREADS
# import "thread.h"
#endif

OF_ASSUME_NONNULL_BEGIN

/*! @file */

@class OFDate;
#ifdef OF_HAVE_SOCKETS
@class OFDNSResolver;
#endif
@class OFRunLoop;
@class OFMutableDictionary OF_GENERIC(KeyType, ObjectType);

#if defined(OF_HAVE_THREADS) && defined(OF_HAVE_BLOCKS)
/*!
 * @brief A block to be executed in a new thread.
 *
 * @return The object which should be returned when the thread is joined
 */
typedef id _Nullable (^of_thread_block_t)(void);
#endif

/*!
 * @class OFThread OFThread.h ObjFW/OFThread.h
 *
 * @brief A class which provides portable threads.
 *
 * To use it, you should create a new class derived from it and reimplement
 * main.
 *

# endif
# ifdef OF_HAVE_SOCKETS
@property (class, readonly, nonatomic) OFDNSResolver *DNSResolver;
# endif
#endif

#ifdef OF_HAVE_THREADS
/*!
 * @brief The name for the thread to use when starting it.
 *
 * @note While this can be changed after the thread has been started, it will
 *	 have no effect once the thread started. If you want to change the name
 *	 of the current thread after it has been started, look at the class
 *	 method @ref setName:.
 */
@property OF_NULLABLE_PROPERTY (copy) OFString *name;

# ifdef OF_HAVE_BLOCKS
/*!
 * @brief The block to execute in the thread.
 */
@property OF_NULLABLE_PROPERTY (readonly, nonatomic)
    of_thread_block_t threadBlock;
# endif

/*!
 * @brief The run loop for the thread.
 */
@property (readonly, nonatomic) OFRunLoop *runLoop;

/*!
 * @brief The priority of the thread.
 *
 * @note This has to be set before the thread is started!
 *
 * This is a value between -1.0 (meaning lowest priority that still schedules)
 * and +1.0 (meaning highest priority that still allows getting preempted)
 * with normal priority being 0.0 (meaning being the same as the main thread).
 */
@property (nonatomic) float priority;

/*!
 * @brief The stack size of the thread.
 *
 * @note This has to be set before the thread is started!
 */
@property (nonatomic) size_t stackSize;

/*!
 * @brief Whether the thread supports sockets.
 *
 * Some operating systems such as AmigaOS need special per-thread
 * initialization of sockets. If you intend to use sockets in the thread, set
 * this property to true before starting the thread.
 */
@property (nonatomic) bool supportsSockets;

/*!
 * @brief Creates a new thread.
 *
 * @return A new, autoreleased thread
 */
+ (instancetype)thread;

# ifdef OF_HAVE_BLOCKS
/*!
 * @brief Creates a new thread with the specified block.
 *
 * @param threadBlock A block which is executed by the thread
 * @return A new, autoreleased thread
 */
+ (instancetype)threadWithThreadBlock: (of_thread_block_t)threadBlock;
# endif

/*!
 * @brief Returns the current thread.
 *
 * @return The current thread
 */
+ (nullable OFThread *)currentThread;

/*!
 * @brief Returns the main thread.
 *
 * @return The main thread
 */
+ (nullable OFThread *)mainThread;

/*!
 * @brief Returns whether the current thread is the main thread.
 *
 * @return Whether the current thread is the main thread.
 */
+ (bool)isMainThread;

/*!
 * @brief Returns a dictionary to store thread-specific data, meaning it
 *	  returns a different dictionary for every thread.
 *
 * @return A dictionary to store thread-specific data
 */
+ (nullable OFMutableDictionary *)threadDictionary;
#endif

#ifdef OF_HAVE_SOCKETS
/*!
 * @brief Returns the DNS resolver for the current thread.
 *
 * @return The DNS resolver for the current thread
 */
+ (OFDNSResolver *)DNSResolver;
#endif

/*!
 * @brief Suspends execution of the current thread for the specified time
 *	  interval.
 *
 * @param timeInterval The number of seconds to sleep
 */
+ (void)sleepForTimeInterval: (of_time_interval_t)timeInterval;

/*!
 * @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 to the end of the
 *	  queue for its priority.
 */
+ (void)yield;

#ifdef OF_HAVE_THREADS
/*!
 * @brief Terminates the current thread, letting it return `nil`.
 */
+ (void)terminate OF_NO_RETURN;

/*!
 * @brief Terminates the current thread, letting it return the specified object.
 *
 * @param object The object which the terminated thread will return
 */
+ (void)terminateWithObject: (nullable id)object OF_NO_RETURN;

/*!
 * @brief Sets the name of the current thread.
 *
 * Unlike the instance method, this can be used after the thread has been
 * started.
 *
 * @param name The new name for the current thread.
 */
+ (void)setName: (nullable OFString *)name;

/*!
 * @brief Returns the name of the current thread.
 *
 * @return The name of the current thread.
 */
+ (nullable OFString *)name;

# ifdef OF_HAVE_BLOCKS
/*!
 * @brief Initializes an already allocated thread with the specified block.
 *
 * @param threadBlock A block which is executed by the thread
 * @return An initialized OFThread.
 */
- (instancetype)initWithThreadBlock: (of_thread_block_t)threadBlock;
# endif

/*!
 * @brief The main routine of the thread. You need to reimplement this!
 *
 * @return The object the join method should return when called for this thread
 */
- (nullable id)main;

/*!
 * @brief This routine is executed when the thread's main method has finished
 *	  executing or terminate has been called.
 *
 * @note Be sure to call [super handleTermination]!
 */
- (void)handleTermination OF_REQUIRES_SUPER;

/*!
 * @brief Starts the thread.
 */
- (void)start;

/*!
 * @brief Joins a thread.
 *
 * @return The object returned by the main method of the thread.
 */
- (id)join;
#else
- (instancetype)init OF_UNAVAILABLE;
#endif
@end

OF_ASSUME_NONNULL_END