aboutsummaryrefslogtreecommitdiff
path: root/docs/doxygen/nel/mutex_8cpp-source.html
blob: f64fd635899ed9478a27cf7781e70511fbb7e217 (plain)
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
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<HTML>
<HEAD>
	<TITLE>nevrax.org : docs</TITLE>
	<LINK REL=stylesheet TYPE="text/css" HREF="http://www.nevrax.org/inc/css/nevrax.css">
	<link href="doxygen.css" rel="stylesheet" type="text/css">
</HEAD>
<BODY MARGINHEIGHT="0" MARGINWIDTH="0">

<!-- uplinks -->
<TABLE CELLSPACING=0 CELLPADDING=0  BORDER=0>
 <TR>
        <TD WIDTH=16><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
        <TD WIDTH=140 BGCOLOR=#dddddd><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="140" HEIGHT="16" BORDER=0 ALT=""></TD>
        <TD WIDTH=16><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
        <TD><IMG width=6 height=14 SRC="http://www.nevrax.org/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle>&nbsp;<A CLASS=uplinks HREF=http://www.nevrax.org><b>Home</B></FONT></A>&nbsp;&nbsp;&nbsp;</TD>
        <TD><IMG  width=6 height=14  SRC="http://www.nevrax.org/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle>&nbsp;<A CLASS=uplinks HREF=http://www.nevrax.com><b>nevrax.com</B></FONT></A>&nbsp;&nbsp;&nbsp;</TD>
 </TR>
</TABLE> 

<!-- banner Nevrax -->
<TABLE CELLSPACING=0 CELLPADDING=0  BORDER=0 WIDTH=100%>
 <TR><TD  BGCOLOR="#000000" BACKGROUND="http://www.nevrax.org/inc/img/black_banner.jpg"><A HREF="http://www.nevrax.org"><IMG  SRC="http://www.nevrax.org/inc/img/nevrax.gif" WIDTH="170" HEIGHT="45" BORDER=0 ALT="Nevrax" ></A></TD></TR>
</TABLE>

<!-- main table -->
<TABLE CELLSPACING=0 CELLPADDING=0  BORDER=0 height=100%>
 <TR>
	<TD WIDTH=16><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="16" HEIGHT="10" BORDER=0 ALT=""></TD>
	<TD WIDTH=140   BGCOLOR=#dddddd VALIGN=TOP ALIGN=middle><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">

		<!------ Begin Box ------>
		<TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0 BGCOLOR=black><TR><TD><TABLE border=0  cellspacing=2 cellpadding=0 width=120><tr><TD ALIGN=middle bgcolor=black>
		<FONT COLOR=white FACE="sans-serif"><B>Nevrax.org</B></FONT></TD></TR><tr><td  colspan=2 bgcolor=#FFFFFF>
		<TABLE cellspacing=0 cellpadding=1 border=0>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/news/" TITLE="Rubrique news"><img width=13 height=15  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-news.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/news/" TITLE="News">News</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/mail/" TITLE="Rubrique mail"><img width=15 height=11  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-mail.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/mail/" TITLE="Mailing list archive">Mailing-list</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/docs/" TITLE="Rubrique docs"><img width=14 height=16  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-docs.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/docs/" TITLE="Documentation">Documentation</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/cvs/" TITLE="Rubrique cvs"><img width=13 height=17  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-cvs.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/cvs/" TITLE="CVS Web">CVS</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/bugs/" TITLE="Rubrique bugs"><img width=20 height=16  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-bugs.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/bugs/" TITLE="Bugtracking">Bugs</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/GPL.php3" TITLE="Rubrique license"><img  width=18 height=12   hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-gpl.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/GPL.php3" TITLE="License">License</a></td></tr>
		</TABLE>
		</TD></TR></TABLE></TD></TR></TABLE>
		<!------ End Box  ------>

	</TD>
	<TD WIDTH=15><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
	<TD ALIGN=left valign=top><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">

<!-- title -->
<TABLE  background="http://www.nevrax.org/inc/img/redline.gif" CELLSPACING=0 CELLPADDING=0  BORDER=0 width=100%><tr><td>
<A HREF="http://www.nevrax.org/docs/"><img src="http://www.nevrax.org/inc/img/t_docs.gif" ALT="Docs" HEIGHT=20 BORDER=0></A>
</td><td><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="1" HEIGHT="1" BORDER=0 ALT="">
</td></tr></table>
&nbsp;

<!-- block -->
<TABLE  bgcolor="#dddddd" CELLSPACING=0 CELLPADDING=0  BORDER=0 width=100%><tr><td width=1% valign=middle><img width=6 height=14 hspace=2 vspace=2 src="http://www.nevrax.org/inc/img/reddots.gif"></TD>
	<TD><B>Documentation</B></TD>
	<TD ALIGN=RIGHT>&nbsp;</td>
</tr></table>
<!-- Generated by Doxygen 1.2.14 -->
<center>
<a class="qindex" href="index.html">Main Page</a> &nbsp; <a class="qindex" href="namespaces.html">Namespace List</a> &nbsp; <a class="qindex" href="hierarchy.html">Class Hierarchy</a> &nbsp; <a class="qindex" href="classes.html">Alphabetical List</a> &nbsp; <a class="qindex" href="annotated.html">Compound List</a> &nbsp; <a class="qindex" href="files.html">File List</a> &nbsp; <a class="qindex" href="namespacemembers.html">Namespace Members</a> &nbsp; <a class="qindex" href="functions.html">Compound Members</a> &nbsp; <a class="qindex" href="globals.html">File Members</a> &nbsp; <a class="qindex" href="pages.html">Related Pages</a> &nbsp; <a class="qindexRef" doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> &nbsp; </center>
<hr><h1>mutex.cpp</h1><a href="mutex_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
00007 <font class="comment">/* Copyright, 2000 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025 
00026 <font class="preprocessor">#include "<a class="code" href="stdmisc_8h.html">stdmisc.h</a>"</font>
00027 
00028 <font class="preprocessor">#ifndef _GNU_SOURCE</font>
00029 <font class="preprocessor"></font><font class="preprocessor">#define _GNU_SOURCE</font>
00030 <font class="preprocessor"></font><font class="preprocessor">#endif // _GNU_SOURCE</font>
00031 <font class="preprocessor"></font>
00032 <font class="preprocessor">#include "<a class="code" href="mutex_8h.html">nel/misc/mutex.h</a>"</font>
00033 <font class="preprocessor">#include "<a class="code" href="time__nl_8h.html">nel/misc/time_nl.h</a>"</font>
00034 
00035 <font class="preprocessor">#ifdef MUTEX_DEBUG</font>
00036 <font class="preprocessor"></font><font class="preprocessor">#include &lt;iostream&gt;</font>
00037 <font class="preprocessor">#endif</font>
00038 <font class="preprocessor"></font>
00039 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00040 
00041 <font class="preprocessor">#ifndef MUTEX_DEBUG</font>
<a name="l00042"></a><a class="code" href="mutex_8cpp.html#a0">00042</a> <font class="preprocessor"></font><font class="preprocessor">#define debugCreateMutex() ;</font>
<a name="l00043"></a><a class="code" href="mutex_8cpp.html#a1">00043</a> <font class="preprocessor"></font><font class="preprocessor">#define debugBeginEnter() ;</font>
<a name="l00044"></a><a class="code" href="mutex_8cpp.html#a2">00044</a> <font class="preprocessor"></font><font class="preprocessor">#define debugEndEnter() ;</font>
<a name="l00045"></a><a class="code" href="mutex_8cpp.html#a3">00045</a> <font class="preprocessor"></font><font class="preprocessor">#define debugLeave() ;</font>
<a name="l00046"></a><a class="code" href="mutex_8cpp.html#a4">00046</a> <font class="preprocessor"></font><font class="preprocessor">#define debugDeleteMutex() ;</font>
00047 <font class="preprocessor"></font><font class="preprocessor">#endif</font>
00048 <font class="preprocessor"></font>
00049 
00050 <font class="comment">/****************</font>
00051 <font class="comment"> * Windows code *</font>
00052 <font class="comment"> ****************/</font>
00053 
00054 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00055 <font class="preprocessor"></font>
00056 <font class="comment">// these defines are for IsDebuggerPresent(). It'll not compile on windows 95</font>
00057 <font class="comment">// just comment this and the IsDebuggerPresent to compile on windows 95</font>
00058 <font class="preprocessor">#define _WIN32_WINDOWS  0x0410</font>
00059 <font class="preprocessor"></font><font class="preprocessor">#define WINVER                  0x0400</font>
00060 <font class="preprocessor"></font><font class="preprocessor">#include &lt;windows.h&gt;</font>
00061 
00062 
00063 <font class="keyword">namespace </font>NLMISC {
00064 
00065 
00066 <font class="comment">/*</font>
00067 <font class="comment"> * Windows version</font>
00068 <font class="comment"> */</font>
00069 
00070 CUnfairMutex::CUnfairMutex()
00071 {
00072         <font class="comment">// Create a mutex with no initial owner.</font>
00073         Mutex = (<font class="keywordtype">void</font> *) CreateMutex (NULL, FALSE, NULL);
00074         <a class="code" href="debug_8h.html#a6">nlassert</a> (Mutex != NULL);
00075 }
00076 
00077 
00078 CUnfairMutex::CUnfairMutex(<font class="keyword">const</font> std::string &amp;name)
00079 {
00080         <font class="comment">// Create a mutex with no initial owner.</font>
00081         Mutex = (<font class="keywordtype">void</font> *) CreateMutex (NULL, FALSE, NULL);
00082         <a class="code" href="debug_8h.html#a6">nlassert</a> (Mutex != NULL);
00083 }
00084 
00085 
00086 <font class="comment">/*</font>
00087 <font class="comment"> * Windows version</font>
00088 <font class="comment"> */</font>
00089 CUnfairMutex::~CUnfairMutex()
00090 {
00091         CloseHandle( Mutex );
00092 }
00093 
00094 
00095 <font class="comment">/*</font>
00096 <font class="comment"> * Windows version</font>
00097 <font class="comment"> */</font>
00098 <font class="keywordtype">void</font> CUnfairMutex::enter()
00099 {
00100 <font class="preprocessor">#ifdef NL_DEBUG</font>
00101 <font class="preprocessor"></font>        DWORD timeout;
00102         <font class="keywordflow">if</font> ( <a class="code" href="displayer_8cpp.html#a0">IsDebuggerPresent</a>() )
00103                 timeout = INFINITE;
00104         <font class="keywordflow">else</font>
00105                 timeout = 10000;
00106 
00107     <font class="comment">// Request ownership of mutex</font>
00108         DWORD dwWaitResult = WaitForSingleObject (Mutex, timeout);
00109 <font class="preprocessor">#else</font>
00110 <font class="preprocessor"></font>    <font class="comment">// Request ownership of mutex during 10s</font>
00111         DWORD dwWaitResult = WaitForSingleObject (Mutex, 10000);
00112 <font class="preprocessor">#endif // NL_DEBUG</font>
00113 <font class="preprocessor"></font>        <font class="keywordflow">switch</font> (dwWaitResult)
00114         {
00115         <font class="comment">// The thread got mutex ownership.</font>
00116         <font class="keywordflow">case</font> WAIT_OBJECT_0:             <font class="keywordflow">break</font>;
00117         <font class="comment">// Cannot get mutex ownership due to time-out.</font>
00118         <font class="keywordflow">case</font> WAIT_TIMEOUT:              <a class="code" href="debug_8h.html#a3">nlerror</a> (<font class="stringliteral">"Dead lock in a mutex (or more that 10s for the critical section"</font>);
00119         <font class="comment">// Got ownership of the abandoned mutex object.</font>
00120         <font class="keywordflow">case</font> WAIT_ABANDONED:    <a class="code" href="debug_8h.html#a3">nlerror</a> (<font class="stringliteral">"A thread forgot to release the mutex"</font>);
00121     }
00122 }
00123 
00124 
00125 <font class="comment">/*</font>
00126 <font class="comment"> * Windows version</font>
00127 <font class="comment"> */</font>
00128 <font class="keywordtype">void</font> CUnfairMutex::leave()
00129 {
00130         <font class="keywordflow">if</font> (ReleaseMutex(Mutex) == 0)
00131         {
00132                 <a class="code" href="debug_8h.html#a3">nlerror</a> (<font class="stringliteral">"error while releasing the mutex (0x%x %d), %p"</font>, GetLastError(), GetLastError(), Mutex);
00133         }
00134 }
00135 
00136 
00137 <font class="comment">/*</font>
00138 <font class="comment"> * Windows version</font>
00139 <font class="comment"> */</font>
00140 CFairMutex::CFairMutex()
00141 {
00142         Name = <font class="stringliteral">"unset mutex name"</font>;
00143 
00144         <a class="code" href="mutex_8cpp.html#a0">debugCreateMutex</a>();
00145 
00146         <font class="comment">// Check that the CRITICAL_SECTION structure has not changed</font>
00147         <a class="code" href="debug_8h.html#a6">nlassert</a>( <font class="keyword">sizeof</font>(TNelRtlCriticalSection)==<font class="keyword">sizeof</font>(CRITICAL_SECTION) );
00148 
00149 <font class="preprocessor">#if (_WIN32_WINNT &gt;= 0x0500)</font>
00150 <font class="preprocessor"></font>        DWORD dwSpinCount = 0x80000000; <font class="comment">// set high-order bit to use preallocation</font>
00151         <font class="keywordflow">if</font> ( ! InitializeCriticalSectionAndSpinCount( &amp;_Cs, dwSpinCount ) )
00152         {
00153                 <a class="code" href="debug_8h.html#a3">nlerror</a>( <font class="stringliteral">"Error entering critical section"</font> );
00154         }
00155 <font class="preprocessor">#else</font>
00156 <font class="preprocessor"></font>        InitializeCriticalSection( (CRITICAL_SECTION*)&amp;_Cs );
00157 <font class="preprocessor">#endif</font>
00158 <font class="preprocessor"></font>}
00159 
00160 
00161 CFairMutex::CFairMutex(<font class="keyword">const</font> string &amp;name)
00162 {
00163         Name = name;
00164 
00165 <font class="preprocessor">#ifdef MUTEX_DEBUG</font>
00166 <font class="preprocessor"></font>        <a class="code" href="mutex_8cpp.html#a0">debugCreateMutex</a>();
00167 <font class="preprocessor">#endif</font>
00168 <font class="preprocessor"></font>
00169         <font class="comment">// Check that the CRITICAL_SECTION structure has not changed</font>
00170         <a class="code" href="debug_8h.html#a6">nlassert</a>( <font class="keyword">sizeof</font>(TNelRtlCriticalSection)==<font class="keyword">sizeof</font>(CRITICAL_SECTION) );
00171 
00172 <font class="preprocessor">#if (_WIN32_WINNT &gt;= 0x0500)</font>
00173 <font class="preprocessor"></font>        DWORD dwSpinCount = 0x80000000; <font class="comment">// set high-order bit to use preallocation</font>
00174         <font class="keywordflow">if</font> ( ! InitializeCriticalSectionAndSpinCount( &amp;_Cs, dwSpinCount ) )
00175         {
00176                 <a class="code" href="debug_8h.html#a3">nlerror</a>( <font class="stringliteral">"Error entering critical section"</font> );
00177         }
00178 <font class="preprocessor">#else</font>
00179 <font class="preprocessor"></font>        InitializeCriticalSection( (CRITICAL_SECTION*)&amp;_Cs );
00180 <font class="preprocessor">#endif</font>
00181 <font class="preprocessor"></font>}
00182 
00183 
00184 
00185 <font class="comment">/*</font>
00186 <font class="comment"> * Windows version</font>
00187 <font class="comment"> */</font>
00188 CFairMutex::~CFairMutex()
00189 {
00190         DeleteCriticalSection( (CRITICAL_SECTION*)&amp;_Cs );
00191 
00192         <a class="code" href="mutex_8cpp.html#a4">debugDeleteMutex</a>();
00193 }
00194 
00195 
00196 <font class="comment">/*</font>
00197 <font class="comment"> * Windows version</font>
00198 <font class="comment"> */</font>
00199 <font class="keywordtype">void</font> CFairMutex::enter()
00200 {
00201         <a class="code" href="mutex_8cpp.html#a1">debugBeginEnter</a>();
00202 
00203         EnterCriticalSection( (CRITICAL_SECTION*)&amp;_Cs );
00204 
00205         <a class="code" href="mutex_8cpp.html#a2">debugEndEnter</a>();
00206 }
00207 
00208 
00209 <font class="comment">/*</font>
00210 <font class="comment"> * Windows version</font>
00211 <font class="comment"> */</font>
00212 <font class="keywordtype">void</font> CFairMutex::leave()
00213 {
00214         LeaveCriticalSection( (CRITICAL_SECTION*)&amp;_Cs );
00215 
00216         <a class="code" href="mutex_8cpp.html#a3">debugLeave</a>();
00217 }
00218 
00219 
00220 
00221 
00222 
00223 
00224 
00225 
00226 <font class="comment">/*************</font>
00227 <font class="comment"> * Unix code *</font>
00228 <font class="comment"> *************/</font>
00229 
00230 <font class="preprocessor">#elif defined NL_OS_UNIX</font>
00231 <font class="preprocessor"></font>
00232 <font class="preprocessor">#include &lt;pthread.h&gt;</font>
00233 <font class="preprocessor">#include &lt;errno.h&gt;</font>
00234 
00235 
00236 <font class="comment">/*</font>
00237 <font class="comment"> * Clanlib authors say: "We need to do this because the posix threads library</font>
00238 <font class="comment"> * under linux obviously suck:"</font>
00239 <font class="comment"> */</font>
00240 <font class="keyword">extern</font> <font class="stringliteral">"C"</font>
00241 {
00242         <font class="keywordtype">int</font> pthread_mutexattr_setkind_np( pthread_mutexattr_t *attr, <font class="keywordtype">int</font> kind );
00243 }
00244 
00245 
00246 <font class="keyword">namespace </font>NLMISC {
00247 
00248 
00249 <font class="comment">/*</font>
00250 <font class="comment"> * Unix version</font>
00251 <font class="comment"> */</font>
00252 CUnfairMutex::CUnfairMutex(<font class="keyword">const</font> std::string &amp;name)
00253 {
00254         pthread_mutexattr_t attr;
00255         pthread_mutexattr_init( &amp;attr );
00256         <font class="comment">// Fast mutex. Note: on Windows all mutexes are recursive</font>
00257         pthread_mutexattr_setkind_np( &amp;attr, PTHREAD_MUTEX_ADAPTIVE_NP ); <font class="comment">//PTHREAD_MUTEX_ERRORCHECK_NP );//PTHREAD_MUTEX_ADAPTIVE_NP );//PTHREAD_MUTEX_RECURSIVE_NP );</font>
00258         pthread_mutex_init( &amp;mutex, &amp;attr );
00259         pthread_mutexattr_destroy( &amp;attr );
00260 }
00261 
00262 
00263 <font class="comment">/*</font>
00264 <font class="comment"> * Unix version</font>
00265 <font class="comment"> */</font>
00266 CUnfairMutex::~CUnfairMutex()
00267 {
00268         pthread_mutex_destroy( &amp;mutex );
00269 }
00270 
00271 
00272 <font class="comment">/*</font>
00273 <font class="comment"> * Unix version</font>
00274 <font class="comment"> */</font>
00275 <font class="keywordtype">void</font> CUnfairMutex::enter()
00276 {
00277         <font class="comment">//cout &lt;&lt; getpid() &lt;&lt; ": Locking " &lt;&lt; &amp;mutex &lt;&lt; endl;</font>
00278         <font class="keywordflow">if</font> ( pthread_mutex_lock( &amp;mutex ) != 0 )
00279         {
00280           <font class="comment">//cout &lt;&lt; "Error locking a mutex " &lt;&lt; endl;</font>
00281                 <a class="code" href="debug_8h.html#a3">nlerror</a>( <font class="stringliteral">"Error locking a mutex"</font> );
00282         }
00283         <font class="comment">/*else</font>
00284 <font class="comment">        {</font>
00285 <font class="comment">          cout &lt;&lt; getpid() &lt;&lt; ": Owning " &lt;&lt; &amp;mutex &lt;&lt; endl;</font>
00286 <font class="comment">        }*/</font>
00287 }
00288 
00289 
00290 <font class="comment">/*</font>
00291 <font class="comment"> * Unix version</font>
00292 <font class="comment"> */</font>
00293 <font class="keywordtype">void</font> CUnfairMutex::leave()
00294 {
00295         <font class="comment">//int errcode;</font>
00296         <font class="comment">//cout &lt;&lt; getpid() &lt;&lt; ": Unlocking " &lt;&lt; &amp;mutex &lt;&lt; endl;</font>
00297         <font class="keywordflow">if</font> ( (<font class="comment">/*errcode=*/</font>pthread_mutex_unlock( &amp;mutex )) != 0 )
00298         {
00299          <font class="comment">/* switch ( errcode )</font>
00300 <font class="comment">            {</font>
00301 <font class="comment">            case EINVAL: cout &lt;&lt; "INVAL" &lt;&lt; endl; break;</font>
00302 <font class="comment">            case EPERM: cout &lt;&lt; "PERM" &lt;&lt; endl; break;</font>
00303 <font class="comment">            default: cout &lt;&lt; "OTHER" &lt;&lt; endl;</font>
00304 <font class="comment">            }</font>
00305 <font class="comment">          */</font>
00306           <font class="comment">//cout &lt;&lt; "Error unlocking a mutex " /*&lt;&lt; &amp;mutex*/ &lt;&lt; endl;</font>
00307                 <a class="code" href="debug_8h.html#a3">nlerror</a>( <font class="stringliteral">"Error unlocking a mutex"</font> );
00308         }
00309         <font class="comment">/*else</font>
00310 <font class="comment">        {</font>
00311 <font class="comment">          cout &lt;&lt; getpid() &lt;&lt; ": Released " &lt;&lt; &amp;mutex &lt;&lt; endl;</font>
00312 <font class="comment">        }*/</font>
00313 }
00314 
00315 
00316 <font class="comment">/*</font>
00317 <font class="comment"> * Unix version</font>
00318 <font class="comment"> */</font>
00319 CFairMutex::CFairMutex()
00320 {
00321         sem_init( const_cast&lt;sem_t*&gt;(&amp;_Sem), 0, 1 );
00322 }
00323 
00324 
00325 CFairMutex::CFairMutex( <font class="keyword">const</font> std::string &amp;name )
00326 {
00327         sem_init( const_cast&lt;sem_t*&gt;(&amp;_Sem), 0, 1 );
00328 }
00329 
00330 
00331 <font class="comment">/*</font>
00332 <font class="comment"> * Unix version</font>
00333 <font class="comment"> */</font>
00334 CFairMutex::~CFairMutex()
00335 {
00336         sem_destroy( const_cast&lt;sem_t*&gt;(&amp;_Sem) ); <font class="comment">// needs that no thread is waiting on the semaphore</font>
00337 }
00338 
00339 
00340 <font class="comment">/*</font>
00341 <font class="comment"> * Unix version</font>
00342 <font class="comment"> */</font>
00343 <font class="keywordtype">void</font> CFairMutex::enter()
00344 {
00345         sem_wait( const_cast&lt;sem_t*&gt;(&amp;_Sem) );
00346 }
00347 
00348 
00349 <font class="comment">/*</font>
00350 <font class="comment"> * Unix version</font>
00351 <font class="comment"> */</font>
00352 <font class="keywordtype">void</font> CFairMutex::leave()
00353 {
00354         sem_post( const_cast&lt;sem_t*&gt;(&amp;_Sem) );
00355 }
00356 
00357 
00358 <font class="preprocessor">#endif // NL_OS_WINDOWS/NL_OS_LINUX</font>
00359 <font class="preprocessor"></font>
00360 
00361 
00362 
00363 
00364 
00365 
00366 <font class="comment">/******************</font>
00367 <font class="comment"> * Debugging code *</font>
00368 <font class="comment"> ******************/</font>
00369         
00370 <font class="preprocessor">#ifdef MUTEX_DEBUG</font>
00371 <font class="preprocessor"></font>
00372 map&lt;CFairMutex*,TMutexLocks&gt;    *AcquireTime = NULL;
00373 <a class="code" href="types__nl_8h.html#a10">uint32</a>                                          NbMutexes = 0;
00374 CFairMutex                                              *ATMutex = NULL;
00375 <font class="keywordtype">bool</font>                                            InitAT = <font class="keyword">true</font>;
00376 
00377 
00379 <font class="keywordtype">void</font> initAcquireTimeMap()
00380 {
00381         <font class="keywordflow">if</font> ( InitAT )
00382         {
00383                 ATMutex = <font class="keyword">new</font> CFairMutex(<font class="stringliteral">"ATMutex"</font>);
00384                 AcquireTime = <font class="keyword">new</font> map&lt;CFairMutex*,TMutexLocks&gt;;
00385                 InitAT = <font class="keyword">false</font>;
00386         }
00387 }
00388 
00389 
00391 map&lt;CFairMutex*,TMutexLocks&gt;    getNewAcquireTimes()
00392 {
00393         map&lt;CMutex*,TMutexLocks&gt;        m;
00394         ATMutex-&gt;enter();
00395 
00396         <font class="comment">// Copy map</font>
00397         m = *AcquireTime;
00398 
00399         <font class="comment">// Reset map</font>
00400 <font class="comment">/*      map&lt;CMutex*,TMutexLocks&gt;::iterator im;</font>
00401 <font class="comment">        for ( im=AcquireTime-&gt;begin(); im!=AcquireTime-&gt;end(); ++im )</font>
00402 <font class="comment">        {</font>
00403 <font class="comment">                (*im).second.Time = 0;</font>
00404 <font class="comment">                (*im).second.Nb = 0;</font>
00405 <font class="comment">                (*im).second.Locked = false;</font>
00406 <font class="comment">        }</font>
00407 <font class="comment">*/</font>
00408         ATMutex-&gt;leave();
00409         <font class="keywordflow">return</font> m;
00410 }
00411 
00412 
00415 
00416 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a0">CFairMutex::debugCreateMutex</a>()
00417 {
00418 <font class="comment">/*      if ( ! InitAT )</font>
00419 <font class="comment">        {</font>
00420 <font class="comment">                ATMutex-&gt;enter();</font>
00421 <font class="comment">                AcquireTime-&gt;insert( make_pair( this, TMutexLocks(NbMutexes) ) );</font>
00422 <font class="comment">                NbMutexes++;</font>
00423 <font class="comment">                ATMutex-&gt;leave();</font>
00424 <font class="comment">                char dbgstr [256];</font>
00425 <font class="comment">                smprintf( dbgstr, 256, "MUTEX: Creating mutex %p %s (number %u)\n", this, Name.c_str(), NbMutexes-1 );</font>
00426 <font class="comment">#ifdef NL_OS_WINDOWS</font>
00427 <font class="comment">                if ( IsDebuggerPresent() )</font>
00428 <font class="comment">                        OutputDebugString( dbgstr );</font>
00429 <font class="comment">#endif</font>
00430 <font class="comment">                cout &lt;&lt; dbgstr &lt;&lt; endl;</font>
00431 <font class="comment">        }</font>
00432 <font class="comment">*/</font>}
00433 
00434 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a4">CFairMutex::debugDeleteMutex</a>()
00435 {
00436         <font class="keywordflow">if</font> ( (<font class="keyword">this</font>!=ATMutex ) &amp;&amp; (ATMutex!=NULL) )
00437         {
00438                 ATMutex-&gt;enter();
00439                 (*AcquireTime)[<font class="keyword">this</font>].Dead = <font class="keyword">true</font>;
00440                 ATMutex-&gt;leave();
00441         }
00442 }
00443 
00444 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a1">CFairMutex::debugBeginEnter</a>()
00445 {
00446         <font class="keywordflow">if</font> ( (<font class="keyword">this</font>!=ATMutex ) &amp;&amp; (ATMutex!=NULL) )
00447         {
00448                 <a class="code" href="namespaceNLMISC.html#a183">TTicks</a> <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a> = CTime::getPerformanceTime();
00449 
00450                 ATMutex-&gt;enter();
00451                 std::map&lt;CMutex*,TMutexLocks&gt;::iterator it = (*AcquireTime).find (<font class="keyword">this</font>);
00452                 <font class="keywordflow">if</font> (it == (*AcquireTime).end())
00453                 {
00454                         AcquireTime-&gt;insert( make_pair( <font class="keyword">this</font>, TMutexLocks(NbMutexes++) ) );
00455                         <font class="keywordtype">char</font> dbgstr [256];
00456                         <a class="code" href="namespaceNLMISC.html#a203">smprintf</a>( dbgstr, 256, <font class="stringliteral">"MUTEX: Creating mutex %p %s (number %u)\n"</font>, <font class="keyword">this</font>, Name.c_str(), NbMutexes-1 );
00457 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00458 <font class="preprocessor"></font>                        <font class="keywordflow">if</font> ( <a class="code" href="displayer_8cpp.html#a0">IsDebuggerPresent</a>() ) OutputDebugString( dbgstr );
00459 <font class="preprocessor">#endif</font>
00460 <font class="preprocessor"></font>                        cout &lt;&lt; dbgstr &lt;&lt; endl;
00461 
00462                         it = (*AcquireTime).find (<font class="keyword">this</font>);
00463                         (*it).second.MutexName = Name;
00464                 }
00465                 (*it).second.WaitingMutex++;
00466                 (*it).second.BeginEnter = <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>;
00467                 ATMutex-&gt;leave();
00468         }
00469 }
00470 
00471 
00472 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a2">CFairMutex::debugEndEnter</a>()
00473 {
00474 <font class="comment">//      printf("1");</font>
00475 <font class="comment">/*      char str[1024];</font>
00476 <font class="comment">        sprintf(str, "enter %8p %8p %8p\n", this, Mutex, getThreadId ());</font>
00477 <font class="comment">        if (Mutex == (void*)0x88)</font>
00478 <font class="comment">        {</font>
00479 <font class="comment">                OutputDebugString (str);</font>
00480 <font class="comment">                if (entered) __asm int 3;</font>
00481 <font class="comment">                entered = true;</font>
00482 <font class="comment">        }</font>
00483 <font class="comment">*/</font>
00484         <font class="keywordflow">if</font> ( ( <font class="keyword">this</font> != ATMutex ) &amp;&amp; ( ATMutex != NULL ) )
00485         {
00486                 <a class="code" href="namespaceNLMISC.html#a183">TTicks</a> <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a> = CTime::getPerformanceTime();
00487                 ATMutex-&gt;enter();
00488                 <font class="keywordflow">if</font> ((uint32)(<a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>-(*AcquireTime)[<font class="keyword">this</font>].BeginEnter) &gt; (*AcquireTime)[<font class="keyword">this</font>].TimeToEnter)
00489                         (*AcquireTime)[<font class="keyword">this</font>].TimeToEnter = (uint32)(<a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>-(*AcquireTime)[<font class="keyword">this</font>].BeginEnter);
00490                 (*AcquireTime)[<font class="keyword">this</font>].Nb += 1;
00491                 (*AcquireTime)[<font class="keyword">this</font>].WaitingMutex--;
00492                 (*AcquireTime)[<font class="keyword">this</font>].ThreadHavingTheMutex = <a class="code" href="namespaceNLMISC.html#a229">getThreadId</a>();
00493                 (*AcquireTime)[<font class="keyword">this</font>].EndEnter = <a class="code" href="driver__opengl__extension__def_8h.html#a384">t</a>;
00494                 ATMutex-&gt;leave();
00495         }
00496 }
00497 
00498 
00499 <font class="keywordtype">void</font> <a class="code" href="mutex_8cpp.html#a3">CFairMutex::debugLeave</a>()
00500 {
00501 <font class="comment">//      printf( "0" );</font>
00502 <font class="comment">/*      char str[1024];</font>
00503 <font class="comment">        sprintf(str, "leave %8p %8p %8p\n", this, Mutex, getThreadId ());</font>
00504 <font class="comment">        if (Mutex == (void*)0x88)</font>
00505 <font class="comment">        {</font>
00506 <font class="comment">                OutputDebugString (str);</font>
00507 <font class="comment">                if (!entered) __asm int 3;</font>
00508 <font class="comment">                entered = false;</font>
00509 <font class="comment">        }</font>
00510 <font class="comment">*/</font>
00511 
00512         <font class="keywordflow">if</font> ( ( <font class="keyword">this</font> != ATMutex ) &amp;&amp; ( ATMutex != NULL ) )
00513         {
00514                 <a class="code" href="namespaceNLMISC.html#a183">TTicks</a> Leave = CTime::getPerformanceTime();
00515                 ATMutex-&gt;enter();
00516                 <font class="keywordflow">if</font> ((uint32)(Leave-(*AcquireTime)[<font class="keyword">this</font>].EndEnter) &gt; (*AcquireTime)[<font class="keyword">this</font>].TimeInMutex)
00517                         (*AcquireTime)[<font class="keyword">this</font>].TimeInMutex = (uint32)(Leave-(*AcquireTime)[<font class="keyword">this</font>].EndEnter);
00518                 (*AcquireTime)[<font class="keyword">this</font>].Nb += 1;
00519                 (*AcquireTime)[<font class="keyword">this</font>].WaitingMutex = <font class="keyword">false</font>;
00520                 (*AcquireTime)[<font class="keyword">this</font>].ThreadHavingTheMutex = 0xFFFFFFFF;
00521                 ATMutex-&gt;leave();
00522         }
00523 
00524 }
00525 
00526 <font class="preprocessor">#endif // MUTEX_DEBUG</font>
00527 <font class="preprocessor"></font>
00528 } <font class="comment">// NLMISC</font>
</pre></div>

<!-- footer -->
<BR><FONT Size=+5>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </FONT>
</TD>
<TD WIDTH=15><IMG  SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD>
</TR>
</TABLE>
</BODY>
</HTML>