ObjFW  Diff

#include <assert.h>
#include <unistd.h>

#import "OFStreamObserver.h"
#import "OFArray.h"
#import "OFDictionary.h"
#import "OFStream.h"
#import "OFNumber.h"
#import "OFDataArray.h"
#ifdef _WIN32
# import "OFTCPSocket.h"
#endif
#import "OFThread.h"
#import "OFAutoreleasePool.h"

#ifdef HAVE_POLL_H
# import "OFStreamObserver_poll.h"
#endif
#if defined(HAVE_SYS_SELECT_H) || defined(_WIN32)
# import "OFStreamObserver_select.h"

		struct sockaddr_in cancelAddr2;
		socklen_t cancelAddrLen;
#endif

		readStreams = [[OFMutableArray alloc] init];
		writeStreams = [[OFMutableArray alloc] init];
		queue = [[OFMutableArray alloc] init];
		queueInfo = [[OFDataArray alloc] initWithItemSize: sizeof(int)];
		queueInfo = [[OFMutableArray alloc] init];
		queueFDs = [[OFDataArray alloc] initWithItemSize: sizeof(int)];

#ifndef _WIN32
		if (pipe(cancelFD))
			@throw [OFInitializationFailedException
			    newWithClass: isa];
#else
		/* Make sure WSAStartup has been called */

			    newWithClass: isa];
#endif

		maxFD = cancelFD[0];
		FDToStream = [self allocMemoryForNItems: maxFD + 1
						 ofSize: sizeof(OFStream*)];
		FDToStream[cancelFD[0]] = nil;

#ifdef OF_THREADS
		mutex = [[OFMutex alloc] init];
#endif
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	close(cancelFD[0]);
	close(cancelFD[1]);

	[(id)delegate release];
	[readStreams release];
	[writeStreams release];
	[queue release];
	[queueInfo release];
	[queueFDs release];
#ifdef OF_THREADS
	[mutex release];
#endif

	[super dealloc];
}

- (id <OFStreamObserverDelegate>)delegate
{
	OF_GETTER(delegate, YES)
}

- (void)setDelegate: (id <OFStreamObserverDelegate>)delegate_
{
	OF_SETTER(delegate, delegate_, YES, NO)
}

- (void)addStreamForReading: (OFStream*)stream
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFNumber *qi = [OFNumber numberWithInt: QUEUE_ADD | QUEUE_READ];
	[mutex lock];
	@try {
		int qi = QUEUE_ADD | QUEUE_READ;
		int fd = [stream fileDescriptor];

	@synchronized (queue) {
		[queue addObject: stream];
		[queueInfo addObject: qi];
		[queueInfo addItem: &qi];
		[queueFDs addItem: &fd];
	} @finally {
		[mutex unlock];
	}

#ifndef _WIN32
	assert(write(cancelFD[1], "", 1) > 0);
#else
	assert(sendto(cancelFD[1], "", 1, 0, (struct sockaddr*)&cancelAddr,
	    sizeof(cancelAddr)) > 0);
#endif

	[pool release];
}

- (void)addStreamForWriting: (OFStream*)stream
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFNumber *qi = [OFNumber numberWithInt: QUEUE_ADD | QUEUE_WRITE];
	[mutex lock];
	@try {
		int qi = QUEUE_ADD | QUEUE_WRITE;
		int fd = [stream fileDescriptor];

	@synchronized (queue) {
		[queue addObject: stream];
		[queueInfo addObject: qi];
		[queueInfo addItem: &qi];
		[queueFDs addItem: &fd];
	} @finally {
		[mutex unlock];
	}

#ifndef _WIN32
	assert(write(cancelFD[1], "", 1) > 0);
#else
	assert(sendto(cancelFD[1], "", 1, 0, (struct sockaddr*)&cancelAddr,
	    sizeof(cancelAddr)) > 0);
#endif

	[pool release];
}

- (void)removeStreamForReading: (OFStream*)stream
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFNumber *qi = [OFNumber numberWithInt: QUEUE_REMOVE | QUEUE_READ];
	[mutex lock];
	@try {
		int qi = QUEUE_REMOVE | QUEUE_READ;
		int fd = [stream fileDescriptor];

	@synchronized (queue) {
		[queue addObject: stream];
		[queueInfo addObject: qi];
		[queueInfo addItem: &qi];
		[queueFDs addItem: &fd];
	} @finally {
		[mutex unlock];
	}

#ifndef _WIN32
	assert(write(cancelFD[1], "", 1) > 0);
#else
	assert(sendto(cancelFD[1], "", 1, 0, (struct sockaddr*)&cancelAddr,
	    sizeof(cancelAddr)) > 0);
#endif

	[pool release];
}

- (void)removeStreamForWriting: (OFStream*)stream
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFNumber *qi = [OFNumber numberWithInt: QUEUE_REMOVE | QUEUE_WRITE];
	[mutex lock];
	@try {
		int qi = QUEUE_REMOVE | QUEUE_WRITE;
		int fd = [stream fileDescriptor];

	@synchronized (queue) {
		[queue addObject: stream];
		[queueInfo addObject: qi];
		[queueInfo addItem: &qi];
		[queueFDs addItem: &fd];
	} @finally {
		[mutex unlock];
	}

#ifndef _WIN32
	assert(write(cancelFD[1], "", 1) > 0);
#else
	assert(sendto(cancelFD[1], "", 1, 0, (struct sockaddr*)&cancelAddr,
	    sizeof(cancelAddr)) > 0);
#endif

	[pool release];
}

- (void)_addFileDescriptorForReading: (int)fd
{
	@throw [OFNotImplementedException newWithClass: isa
					      selector: _cmd];
}

- (void)_addStreamForReading: (OFStream*)strea;
- (void)_addFileDescriptorForWriting: (int)fd
{
	@throw [OFNotImplementedException newWithClass: isa
					      selector: _cmd];
}

- (void)_addStreamForWriting: (OFStream*)stream
- (void)_removeFileDescriptorForReading: (int)fd
{
	@throw [OFNotImplementedException newWithClass: isa
					      selector: _cmd];
}

- (void)_removeStreamForReading: (OFStream*)stream
{
	@throw [OFNotImplementedException newWithClass: isa
					      selector: _cmd];
}

- (void)_removeFileDescriptorForWriting: (int)fd
- (void)_removeStreamForWriting: (OFStream*)stream
{
	@throw [OFNotImplementedException newWithClass: isa
					      selector: _cmd];
}

- (void)_processQueue
{
	@synchronized (queue) {
	[mutex lock];
	@try {
		OFStream **queueCArray = [queue cArray];
		OFNumber **queueInfoCArray = [queueInfo cArray];
		int *queueInfoCArray = [queueInfo cArray];
		int *queueFDsCArray = [queueFDs cArray];
		size_t i, count = [queue count];

		for (i = 0; i < count; i++) {
			OFStream *stream = queueCArray[i];
			int action = [queueInfoCArray[i] intValue];
			int action = queueInfoCArray[i];
			int fd = queueFDsCArray[i];

			if ((action & QUEUE_ACTION) == QUEUE_ADD) {
				int fd = [queueCArray[i] fileDescriptor];

				if (fd > maxFD) {
					maxFD = fd;
					FDToStream = [self
					    resizeMemory: FDToStream
						toNItems: maxFD + 1
						  ofSize: sizeof(OFStream*)];
				}

				FDToStream[fd] = queueCArray[i];
				FDToStream[fd] = stream;
			}

			if ((action & QUEUE_ACTION) == QUEUE_REMOVE) {
				int fd = [queueCArray[i] fileDescriptor];

				/* FIXME: Maybe downsize? */
				FDToStream[fd] = nil;
			}

			switch (action) {
			case QUEUE_ADD | QUEUE_READ:
				[readStreams addObject: queueCArray[i]];
				[readStreams addObject: stream];

				[self _addStreamForReading: queueCArray[i]];
				[self _addFileDescriptorForReading: fd];

				break;
			case QUEUE_ADD | QUEUE_WRITE:
				[writeStreams addObject: queueCArray[i]];
				[writeStreams addObject: stream];

				[self _addStreamForWriting: queueCArray[i]];
				[self _addFileDescriptorForWriting: fd];

				break;
			case QUEUE_REMOVE | QUEUE_READ:
				[readStreams removeObjectIdenticalTo:
				[readStreams removeObjectIdenticalTo: stream];
				    queueCArray[i]];

				[self _removeStreamForReading: queueCArray[i]];
				[self _removeFileDescriptorForReading: fd];

				break;
			case QUEUE_REMOVE | QUEUE_WRITE:
				[writeStreams removeObjectIdenticalTo:
				[writeStreams removeObjectIdenticalTo: stream];
				    queueCArray[i]];

				[self _removeStreamForWriting: queueCArray[i]];
				[self _removeFileDescriptorForWriting: fd];

				break;
			default:
				assert(0);
			}
		}

		[queue removeNObjects: count];
		[queueInfo removeNObjects: count];
		[queueInfo removeNItems: count];
		[queueFDs removeNItems: count];
	} @finally {
		[mutex unlock];
	}
}

- (void)observe
{
	[self observeWithTimeout: -1];
}