/
UKThreadMessenger.m
188 lines (149 loc) · 4.77 KB
/
UKThreadMessenger.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
//
// UKThreadMessenger.m
// Shovel
//
// Created 14.10.2004 by Uli Kusterer.
// Copyright 2004 Uli Kusterer.
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
// -----------------------------------------------------------------------------
// Headers:
// -----------------------------------------------------------------------------
#import "UKThreadMessenger.h"
#include <unistd.h>
@implementation UKThreadMessenger
-(id) initWithTarget: (id)trg newestFirst: (BOOL)nwf
{
self = [super init];
if( self )
{
messages = [[NSMutableArray alloc] init];
target = trg;
newestFirst = nwf;
[NSThread detachNewThreadSelector: @selector(sendMessages:) toTarget: self withObject: nil];
}
return self;
}
-(void) dealloc
{
[messages release];
[super dealloc];
//NSLog(@"thread messenger released.");
}
// -----------------------------------------------------------------------------
// release:
// Since NSThread retains its target, we need this method to terminate the
// thread when we reach a retain-count of two.
//
// REVISIONS:
// 2004-11-12 UK Created.
// -----------------------------------------------------------------------------
-(void) release
{
if( [self retainCount] == 2 && threadRunning )
threadRunning = NO;
[super release];
}
-(void) sendMessages: (id)sender
{
threadRunning = YES;
[NSThread setThreadPriority: 0.3]; // Lower this thread's priority.
while( threadRunning )
{
while( threadRunning && (!messages || [messages count] <= 0) )
{
usleep(1000);
}
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
NSArray* msgs = nil;
@synchronized( self )
{
msgs = [messages autorelease];
messages = [[NSMutableArray alloc] init];
}
NSEnumerator* enny;
if( newestFirst )
enny = [msgs reverseObjectEnumerator];
else
enny = [msgs objectEnumerator];
NSInvocation* inv;
while( (inv = [enny nextObject]) )
{
NSAutoreleasePool* pool2 = [[NSAutoreleasePool alloc] init];
[inv invoke];
[pool2 release];
//usleep(1);
}
[pool release];
}
//NSLog(@"sendMessages terminated.");
}
-(id) performSelector: (SEL)itemAction withObject: (id)obj
{
BOOL does = [super respondsToSelector: itemAction];
if( does )
return [super performSelector: itemAction withObject: obj];
if( ![target respondsToSelector: itemAction] )
[self doesNotRecognizeSelector: itemAction];
NSInvocation* inv = [NSInvocation invocationWithMethodSignature: [target methodSignatureForSelector: @selector(itemAction)]];
[inv setSelector: itemAction];
[inv setTarget: target];
[inv retainArguments];
@synchronized( self )
{
[messages addObject: inv];
}
return nil;
}
-(BOOL) respondsToSelector: (SEL)itemAction
{
BOOL does = [super respondsToSelector: itemAction];
return( does || [target respondsToSelector: itemAction] );
}
// -----------------------------------------------------------------------------
// Forwarding unknown methods to the first responder:
// -----------------------------------------------------------------------------
-(NSMethodSignature*) methodSignatureForSelector: (SEL)itemAction
{
NSMethodSignature* sig = [super methodSignatureForSelector: itemAction];
if( sig )
return sig;
return [target methodSignatureForSelector: itemAction];
return nil;
}
-(void) forwardInvocation: (NSInvocation*)invocation
{
SEL itemAction = [invocation selector];
NSInvocation* inv;
if( [target respondsToSelector: itemAction] )
{
inv = invocation;
[inv setTarget: target];
[inv retainArguments];
@synchronized( self )
{
[messages addObject: inv];
}
}
else
[self doesNotRecognizeSelector: itemAction];
}
@end