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//
// WriterThread.m
// Liaison
//
// Created by Brian Cully on Wed Feb 26 2003.
// Copyright (c) 2003 Brian Cully. All rights reserved.
//
#import "NSFileHandleExtensions.h"
#import "WriterThread.h"
#import <errno.h>
#import <sys/types.h>
#import <sys/uio.h>
#import <unistd.h>
#define NO_DATA 0
#define HAS_DATA 1
@implementation WriterThread
- (id)initWithFileHandle: (NSFileHandle *)aFileHandle
{
self = [super init];
theKillFlag = NO;
[self setDataQueue: [NSMutableArray array]];
[self setQueueLock:
[[[NSConditionLock alloc] initWithCondition: NO_DATA] autorelease]];
[self setFile: aFileHandle];
[NSThread detachNewThreadSelector: @selector(startThreadWithObject:)
toTarget: self
withObject: nil];
return self;
}
- (void)dealloc
{
[self setFile: nil];
[self setDataQueue: nil];
[self setQueueLock: nil];
[super dealloc];
}
- (BOOL)writeBufferedData: (NSData *)someData
{
if (theConnectionIsOpen) {
int fileDescriptor;
ssize_t dataLen, wroteLen;
void *data;
fileDescriptor = [[self file] fileDescriptor];
data = (void *)[someData bytes];
dataLen = [someData length];
wroteLen = 0;
while (wroteLen < dataLen) {
ssize_t rc;
rc = write(fileDescriptor,
data+wroteLen,
dataLen-wroteLen);
if (rc >= 0) {
wroteLen += rc;
} else {
if (errno == EINTR || errno == EAGAIN)
continue;
theConnectionIsOpen = NO;
break;
}
}
}
return theConnectionIsOpen;
}
- (void)sendNextData
{
NSData *dataToSend;
NSNotificationCenter *defaultCenter;
[[self queueLock] lockWhenCondition: HAS_DATA];
if (theKillFlag || theConnectionIsOpen == NO) {
return;
}
if ([[self dataQueue] count] <= 0) {
[[self queueLock] unlockWithCondition: NO_DATA];
[LiLog unindentDebugLog];
return;
}
dataToSend = [[[[self dataQueue] objectAtIndex: 0] retain] autorelease];
[[self dataQueue] removeObjectAtIndex: 0];
if ([[self dataQueue] count] > 0)
[[self queueLock] unlockWithCondition: HAS_DATA];
else
[[self queueLock] unlockWithCondition: NO_DATA];
defaultCenter = [NSNotificationCenter defaultCenter];
if ([self writeBufferedData: dataToSend] == NO) {
NSNotification *notification;
notification = [NSNotification notificationWithName: FileHandleClosed
object: [self file]];
[defaultCenter performSelectorOnMainThread: @selector(postNotification:)
withObject: notification
waitUntilDone: YES];
} else {
NSNotification *notification;
notification = [NSNotification notificationWithName: FileHandleWriteComplete
object: [self file]];
[defaultCenter performSelectorOnMainThread: @selector(postNotification:)
withObject: notification
waitUntilDone: NO];
}
}
- (void)startThreadWithObject: (id)anObject
{
NSAutoreleasePool *rp;
NSDictionary *userInfo;
NSNotification *notification;
NSNotificationCenter *defaultCenter;
NSNumber *fd;
rp = [[NSAutoreleasePool alloc] init];
fd = [NSNumber numberWithInt: [[self file] fileDescriptor]];
theConnectionIsOpen = YES;
while (theKillFlag == NO) {
NSAutoreleasePool *srp;
srp = [[NSAutoreleasePool alloc] init];
[self sendNextData];
[srp release];
}
userInfo = [NSDictionary dictionaryWithObject: fd
forKey: @"FileDescriptorKey"];
defaultCenter = [NSNotificationCenter defaultCenter];
notification = [NSNotification notificationWithName: WriterThreadDied
object: self
userInfo: userInfo];
[defaultCenter performSelectorOnMainThread: @selector(postNotification:)
withObject: notification
waitUntilDone: YES];
[rp release];
}
- (void)die
{
[[self queueLock] lock];
theKillFlag = YES;
[[self queueLock] unlockWithCondition: HAS_DATA];
}
- (void)writeData: (NSData *)someData
{
if (someData == nil)
return;
[[self queueLock] lock];
NS_DURING
[[self dataQueue] addObject: someData];
NS_HANDLER
[LiLog logAsDebug: @"Got exception '%@' trying to add to data queue: %@.", [localException name], [localException reason]];
NS_ENDHANDLER
[[self queueLock] unlockWithCondition: HAS_DATA];
}
@synthesize theQueueLock;
@synthesize theConnectionIsOpen;
@synthesize theKillFlag;
@synthesize theDataQueue;
@end
@implementation WriterThread (Accessors)
- (NSMutableArray *)dataQueue
{
return theDataQueue;
}
- (void)setDataQueue: (NSMutableArray *)aQueue
{
[aQueue retain];
[theDataQueue release];
theDataQueue = aQueue;
}
- (NSConditionLock *)queueLock
{
return theQueueLock;
}
- (void)setQueueLock: (NSConditionLock *)aLock
{
[aLock retain];
[theQueueLock release];
theQueueLock = aLock;
}
- (NSFileHandle *)file
{
return theFile;
}
- (void)setFile: (NSFileHandle *)aFile
{
theFile = aFile;
}
@end
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