MYNetwork: TCP/TCPWriter.m@6f539dd9921c

     1 //

     2 //  TCPWriter.m

     3 //  MYNetwork

     4 //

     5 //  Created by Jens Alfke on 5/10/08.

     6 //  Copyright 2008 Jens Alfke. All rights reserved.

     7 //

     9 #import "TCPWriter.h"

    10 #import "TCP_Internal.h"

    12 #import "Logging.h"

    13 #import "Test.h"

    16 @implementation TCPWriter

    19 - (void) dealloc

    20 {

    21     [_queue release];

    22     [_currentData release];

    23     [super dealloc];

    24 }

    27 - (TCPReader*) reader

    28 {

    29     return _conn.reader;

    30 }

    33 - (BOOL) isBusy

    34 {

    35     return _currentData || _queue.count > 0;

    36 }

    39 - (void) writeData: (NSData*)data

    40 {

    41     if( !_queue )

    42         _queue = [[NSMutableArray alloc] init];

    43     [_queue addObject: data];

    44     if( _queue.count==1 && ((NSOutputStream*)_stream).hasSpaceAvailable )

    45         [self _canWrite];

    46 }

    49 - (void) _canWrite

    50 {

    51     if( ! _currentData ) {

    52         if( _queue.count==0 ) {

    53             [self queueIsEmpty]; // this may call -writeData, which will call _canWrite again

    54             return;

    55         }

    56         _currentData = [[_queue objectAtIndex: 0] retain];

    57         _currentDataPos = 0;

    58         [_queue removeObjectAtIndex: 0];

    59     }

    61     const uint8_t* src = _currentData.bytes;

    62     src += _currentDataPos;

    63     NSInteger len = _currentData.length - _currentDataPos;

    64     NSInteger written = [(NSOutputStream*)_stream write: src maxLength: len];

    65     if( written < 0 )

    66         [self _gotError];

    67     else if( written < len ) {

    68         LogTo(TCPVerbose,@"%@ wrote %i bytes (of %u)", self,written,len);

    69         _currentDataPos += written;

    70     } else {

    71         LogTo(TCPVerbose,@"%@ wrote %i bytes", self,written);

    72         setObj(&_currentData,nil);

    73     }

    74 }

    77 - (void) queueIsEmpty

    78 {

    79 }

    82 @end

    85 /*

    86  Copyright (c) 2008, Jens Alfke <jens@mooseyard.com>. All rights reserved.

    88  Redistribution and use in source and binary forms, with or without modification, are permitted

    89  provided that the following conditions are met:

    91  * Redistributions of source code must retain the above copyright notice, this list of conditions

    92  and the following disclaimer.

    93  * Redistributions in binary form must reproduce the above copyright notice, this list of conditions

    94  and the following disclaimer in the documentation and/or other materials provided with the

    95  distribution.

    97  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR

    98  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

    99  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-

   100  BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

   101  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

   102   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

   103  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF

   104  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

   105  */

author	Jens Alfke <jens@mooseyard.com>
	Thu May 29 16:40:36 2008 -0700 (2008-05-29)
changeset 8	6f539dd9921c
parent 1	8267d5c429c4
child 10	a2aeb9b04ecc
permissions	-rw-r--r--