ObjFW  Check-in [df53f06922]

 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#import "OFObject.h"

@class OFSortedList;
@class OFStreamObserver;
@class OFTimer;

/**
 * \brief A class providing a run loop for the application and its processes.
 */
@interface OFRunLoop: OFObject
{
	OFSortedList *timersQueue;
	OFStreamObserver *streamObserver;
}

/**
 * \brief Returns the main run loop.
 *
 * \return The main run loop
 */

#include "config.h"

#import "OFRunLoop.h"
#import "OFThread.h"
#import "OFSortedList.h"
#import "OFTimer.h"
#import "OFDate.h"
#import "OFStreamObserver.h"

static OFTLSKey *currentRunLoopKey;
static OFRunLoop *mainRunLoop;

@implementation OFRunLoop
+ (void)initialize
{

{
	self = [super init];

	@try {
		void *pool = objc_autoreleasePoolPush();

		timersQueue = [[[OFThread currentThread] _timersQueue] retain];
		streamObserver = [[OFStreamObserver alloc] init];

		[OFThread setObject: self
			  forTLSKey: currentRunLoopKey];

		objc_autoreleasePoolPop(pool);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	[timersQueue release];
	[streamObserver release];

	[super dealloc];
}

- (void)addTimer: (OFTimer*)timer
{
	@synchronized (timersQueue) {
		[timersQueue addObject: timer];
	}
	[streamObserver cancel];
}

- (void)run
{
	for (;;) {
		void *pool = objc_autoreleasePoolPush();
		OFDate *now = [OFDate date];

				[timersQueue removeListObject: iter];

				[timer fire];

				objc_autoreleasePoolPop(pool2);
			}

			/* Sleep until we reach the next timer */
			if (iter != NULL)
			/* Watch for stream events till the next timer is due */
			if (iter != NULL) {
				[OFThread sleepUntilDate:
				    [iter->object fireDate]];
			else {
				double timeout = [[iter->object fireDate]
				    timeIntervalSinceNow];
				[streamObserver observeWithTimeout: timeout];
			} else {
				/*
				 * FIXME:
				 * Theoretically, another thread could add
				 * something to the run loop. This means we
				 * would need a way to block the thread until
				 * another event is added. The most easy way to
				 * achieve that would be if a run loop also
				 * handles streams: An OFStreamObserver could
				 * be called instead of sleepUntilDate above
				 * and get a timeout. If no timers are left,
				 * No more timers: Just watch for streams until
				 * it could be called without a timeout and
				 * would automatically stop blocking once a new
				 * stream is added. This could also be used to
				 * stop blocking once a new timer is added.
				 * we get an event. If a timer is added by
				 * another thread, it cancels the observe.
				 */
				[OFThread sleepForTimeInterval: 24 * 3600];
				[streamObserver observe];
			}
		}

		objc_autoreleasePoolPop(pool);
	}
}
@end