/*
* Copyright (c) 2008, 2009, 2010, 2011
* 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.
*/
#include "config.h"
#define OF_STREAM_OBSERVER_M
#define __NO_EXT_QNX
#include <assert.h>
#include <unistd.h>
#import "OFStreamObserver.h"
#import "OFArray.h"
#import "OFDictionary.h"
#import "OFStream.h"
#import "OFNumber.h"
#ifdef _WIN32
# import "OFTCPSocket.h"
#endif
#import "OFAutoreleasePool.h"
#ifdef HAVE_POLL_H
# import "OFStreamObserver_poll.h"
#endif
#if defined(HAVE_SYS_SELECT_H) || defined(_WIN32)
# import "OFStreamObserver_select.h"
#endif
#import "OFInitializationFailedException.h"
#import "OFNotImplementedException.h"
#import "OFOutOfRangeException.h"
#import "macros.h"
enum {
QUEUE_ADD = 0,
QUEUE_REMOVE = 1,
QUEUE_READ = 0,
QUEUE_WRITE = 2
};
#define QUEUE_ACTION (QUEUE_ADD | QUEUE_REMOVE)
@implementation OFStreamObserver
+ observer
{
return [[[self alloc] init] autorelease];
}
#if defined(HAVE_POLL_H)
+ alloc
{
if (self == [OFStreamObserver class])
return [OFStreamObserver_poll alloc];
return [super alloc];
}
#elif defined(HAVE_SYS_SELECT_H) || defined(_WIN32)
+ alloc
{
if (self == [OFStreamObserver class])
return [OFStreamObserver_select alloc];
return [super alloc];
}
#endif
- init
{
self = [super init];
@try {
#ifdef _WIN32
struct sockaddr_in cancelAddr2;
socklen_t cancelAddrLen;
#endif
readStreams = [[OFMutableArray alloc] init];
writeStreams = [[OFMutableArray alloc] init];
queue = [[OFMutableArray alloc] init];
queueInfo = [[OFMutableArray alloc] init];
#ifndef _WIN32
if (pipe(cancelFD))
@throw [OFInitializationFailedException
newWithClass: isa];
#else
/* Make sure WSAStartup has been called */
[OFTCPSocket class];
cancelFD[0] = socket(AF_INET, SOCK_DGRAM, 0);
cancelFD[1] = socket(AF_INET, SOCK_DGRAM, 0);
if (cancelFD[0] == INVALID_SOCKET ||
cancelFD[1] == INVALID_SOCKET)
@throw [OFInitializationFailedException
newWithClass: isa];
cancelAddr.sin_family = AF_INET;
cancelAddr.sin_port = 0;
cancelAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
cancelAddr2 = cancelAddr;
if (bind(cancelFD[0], (struct sockaddr*)&cancelAddr,
sizeof(cancelAddr)) || bind(cancelFD[1],
(struct sockaddr*)&cancelAddr2, sizeof(cancelAddr2)))
@throw [OFInitializationFailedException
newWithClass: isa];
cancelAddrLen = sizeof(cancelAddr);
if (getsockname(cancelFD[0], (struct sockaddr*)&cancelAddr,
&cancelAddrLen))
@throw [OFInitializationFailedException
newWithClass: isa];
#endif
maxFD = cancelFD[0];
FDToStream = [self allocMemoryForNItems: maxFD + 1
withSize: sizeof(OFStream*)];
FDToStream[cancelFD[0]] = nil;
} @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];
[super dealloc];
}
- (id <OFStreamObserverDelegate>)delegate
{
OF_GETTER(delegate, YES)
}
- (void)setDelegate: (id <OFStreamObserverDelegate>)delegate_
{
OF_SETTER(delegate, delegate_, YES, NO)
}
- (void)addStreamToObserveForReading: (OFStream*)stream
{
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
OFNumber *qi = [OFNumber numberWithInt: QUEUE_ADD | QUEUE_READ];
@synchronized (queue) {
[queue addObject: stream];
[queueInfo addObject: qi];
}
#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)addStreamToObserveForWriting: (OFStream*)stream
{
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
OFNumber *qi = [OFNumber numberWithInt: QUEUE_ADD | QUEUE_WRITE];
@synchronized (queue) {
[queue addObject: stream];
[queueInfo addObject: qi];
}
#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)removeStreamToObserveForReading: (OFStream*)stream
{
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
OFNumber *qi = [OFNumber numberWithInt: QUEUE_REMOVE | QUEUE_READ];
@synchronized (queue) {
[queue addObject: stream];
[queueInfo addObject: qi];
}
#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)removeStreamToObserveForWriting: (OFStream*)stream
{
OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
OFNumber *qi = [OFNumber numberWithInt: QUEUE_REMOVE | QUEUE_WRITE];
@synchronized (queue) {
[queue addObject: stream];
[queueInfo addObject: qi];
}
#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)_addStreamToObserveForReading: (OFStream*)strea;
{
@throw [OFNotImplementedException newWithClass: isa
selector: _cmd];
}
- (void)_addStreamToObserveForWriting: (OFStream*)stream
{
@throw [OFNotImplementedException newWithClass: isa
selector: _cmd];
}
- (void)_removeStreamToObserveForReading: (OFStream*)stream
{
@throw [OFNotImplementedException newWithClass: isa
selector: _cmd];
}
- (void)_removeStreamToObserveForWriting: (OFStream*)stream
{
@throw [OFNotImplementedException newWithClass: isa
selector: _cmd];
}
- (void)_processQueue
{
@synchronized (queue) {
OFStream **queueCArray = [queue cArray];
OFNumber **queueInfoCArray = [queueInfo cArray];
size_t i, count = [queue count];
for (i = 0; i < count; i++) {
int action = [queueInfoCArray[i] intValue];
if ((action & QUEUE_ACTION) == QUEUE_ADD) {
int fd = [queueCArray[i] fileDescriptor];
if (fd > maxFD) {
maxFD = fd;
FDToStream = [self
resizeMemory: FDToStream
toNItems: maxFD + 1
withSize: sizeof(OFStream*)];
}
FDToStream[fd] = queueCArray[i];
}
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]];
[self _addStreamToObserveForReading:
queueCArray[i]];
break;
case QUEUE_ADD | QUEUE_WRITE:
[writeStreams addObject: queueCArray[i]];
[self _addStreamToObserveForWriting:
queueCArray[i]];
break;
case QUEUE_REMOVE | QUEUE_READ:
[readStreams removeObjectIdenticalTo:
queueCArray[i]];
[self _removeStreamToObserveForReading:
queueCArray[i]];
break;
case QUEUE_REMOVE | QUEUE_WRITE:
[writeStreams removeObjectIdenticalTo:
queueCArray[i]];
[self _removeStreamToObserveForWriting:
queueCArray[i]];
break;
default:
assert(0);
}
}
[queue removeNObjects: count];
[queueInfo removeNObjects: count];
}
}
- (void)observe
{
[self observeWithTimeout: -1];
}
- (BOOL)observeWithTimeout: (int)timeout
{
@throw [OFNotImplementedException newWithClass: isa
selector: _cmd];
}
- (BOOL)_processCache
{
OFAutoreleasePool *pool;
OFStream **cArray = [readStreams cArray];
size_t i, count = [readStreams count];
BOOL foundInCache = NO;
pool = [[OFAutoreleasePool alloc] init];
for (i = 0; i < count; i++) {
if ([cArray[i] pendingBytes] > 0) {
[delegate streamDidBecomeReadyForReading: cArray[i]];
foundInCache = YES;
[pool releaseObjects];
}
}
[pool release];
/*
* As long as we have data in the cache for any stream, we don't want
* to block.
*/
if (foundInCache)
return YES;
return NO;
}
@end
@implementation OFObject (OFStreamObserverDelegate)
- (void)streamDidBecomeReadyForReading: (OFStream*)stream
{
}
- (void)streamDidBecomeReadyForWriting: (OFStream*)stream
{
}
- (void)streamDidReceiveException: (OFStream*)stream
{
}
@end