-
Notifications
You must be signed in to change notification settings - Fork 72
/
CKConnectionThreadManager.m
231 lines (194 loc) · 5.83 KB
/
CKConnectionThreadManager.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
/*
Copyright (c) 2006, Greg Hulands <ghulands@mac.com>
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list
of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or other
materials provided with the distribution.
Neither the name of Greg Hulands nor the names of its contributors may be used to
endorse or promote products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "CKConnectionThreadManager.h"
#import "KTLog.h"
#import "InterThreadMessaging.h"
#import "CKAbstractConnection.h"
@interface CKConnectionThreadManager (Private)
- (void)processTasks;
@end
enum {
CHECK_TASKS = 1
};
static CKConnectionThreadManager *_default = nil;
static NSLock *_initLock = nil;
@implementation CKConnectionThreadManager
+ (void)load
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
_initLock = [[NSLock alloc] init];
[pool release];
}
+ (id)defaultManager
{
[_initLock lock];
if (!_default)
{
_default = [[CKConnectionThreadManager alloc] init];
}
[_initLock unlock];
return _default;
}
- (id)init
{
if (self = [super init])
{
myLock = [[NSLock alloc] init];
myTasks = [[NSMutableArray alloc] init];
myPort = [[NSPort port] retain];
[myPort setDelegate:self];
[NSThread detachNewThreadSelector:@selector(connectionFrameworkThread:) toTarget:self withObject:nil];
}
return self;
}
- (void)dealloc
{
[myLock release];
[myTasks release];
[super dealloc];
}
- (void)connectionFrameworkThread:(id)unused
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
myBgThread = [NSThread currentThread];
[NSThread prepareForConnectionInterThreadMessages];
[[NSRunLoop currentRunLoop] addPort:myPort forMode:NSDefaultRunLoopMode];
// NOTE: this may be leaking ... there are two retains going on here. Apple bug report #2885852, still open since 2002!
// But then again, we can't remove the thread, so it really doesn't mean much.
NSDate *backToTheFuture = [NSDate distantFuture];
while (1)
{
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:backToTheFuture];
}
[pool release];
}
#pragma mark -
#pragma mark Threading Support
- (void)sendPortMessage:(int)aMessage
{
if (nil != myPort)
{
NSPortMessage *message = [[NSPortMessage alloc] initWithSendPort:myPort
receivePort:myPort components:nil];
[message setMsgid:aMessage];
@try {
if ([NSThread currentThread] != myBgThread)
{
BOOL sent = [message sendBeforeDate:[NSDate dateWithTimeIntervalSinceNow:5.0]];
if (!sent)
{
KTLog(CKThreadingDomain, KTLogFatal, @"ConnectionThreadManager couldn't send message %d", aMessage);
}
}
else
{
[self handlePortMessage:message];
}
} @catch (NSException *ex) {
KTLog(CKThreadingDomain, KTLogError, @"%@", ex);
// if we fail to send it is usually because the queueing is occurring on the main thread. so we can actually just use the runloop to repost
[self performSelector:@selector(runloopResend:) withObject:[NSNumber numberWithInt:aMessage] afterDelay:0.0];
} @finally {
[message release];
}
}
}
- (void)runloopResend:(NSNumber *)msg
{
[self sendPortMessage:[msg intValue]];
}
- (void)handlePortMessage:(NSPortMessage *)portMessage
{
int message = [portMessage msgid];
switch (message)
{
case CHECK_TASKS:
{
[self processTasks];
}
}
}
- (void)processTasks
{
[myLock lock];
NSArray *tasks = [[myTasks copy] autorelease];
[myTasks removeAllObjects];
[myLock unlock];
NSEnumerator *e = [tasks objectEnumerator];
NSInvocation *cur;
while (cur = [e nextObject])
{
@try {
[cur invoke];
[[cur target] release];
}
@catch (NSException *ex) {
KTLog(CKThreadingDomain, KTLogDebug, @"Exception caught when invoking: %@\n %@", cur, ex);
NSLog(@"Exception caught when invoking: %@\n %@", cur, ex);
}
}
}
- (void)scheduleInvocation:(NSInvocation *)inv
{
[myLock lock];
[myTasks addObject:inv];
[myLock unlock];
if ([NSThread currentThread] != myBgThread)
{
[self sendPortMessage:CHECK_TASKS];
}
else
{
// we want to do this the next time through the runloop
[self performSelector:@selector(processTasks)
withObject:nil
afterDelay:0.0];
}
}
- (id)prepareWithInvocationTarget:(id)target
{
[myLock lock];
[myTarget release];
myTarget = [target retain];
return self;
}
- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
{
NSMethodSignature *sig = [super methodSignatureForSelector:aSelector];
if (!sig)
{
sig = [myTarget methodSignatureForSelector:aSelector];
}
return sig;
}
- (void)forwardInvocation:(NSInvocation *)inv
{
[inv setTarget:myTarget];
[inv retainArguments];
myTarget = nil;
[myLock unlock];
[self scheduleInvocation:inv];
//[self performSelector:@selector(scheduleInvocation:) withObject:inv afterDelay:0.0];
}
@end