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semaphor.h
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1 /*
2 * semaphor.h
3 *
4 * Thread synchronisation semaphore class.
5 *
6 * Portable Tools Library
7 *
8 * Copyright (c) 1993-1998 Equivalence Pty. Ltd.
9 *
10 * The contents of this file are subject to the Mozilla Public License
11 * Version 1.0 (the "License"); you may not use this file except in
12 * compliance with the License. You may obtain a copy of the License at
13 * http://www.mozilla.org/MPL/
14 *
15 * Software distributed under the License is distributed on an "AS IS"
16 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
17 * the License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * The Original Code is Portable Windows Library.
21 *
22 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
23 *
24 * Portions are Copyright (C) 1993 Free Software Foundation, Inc.
25 * All Rights Reserved.
26 *
27 * Contributor(s): ______________________________________.
28 *
29 * $Revision: 28062 $
30 * $Author: rjongbloed $
31 * $Date: 2012-07-19 19:45:52 +1000 (Thu, 19 Jul 2012) $
32 */
33
34 #ifndef PTLIB_SEMAPHORE_H
35 #define PTLIB_SEMAPHORE_H
36
37 #ifdef P_USE_PRAGMA
38 #pragma interface
39 #endif
40
41 #include <ptlib/psync.h>
42 #include <limits.h>
43 #include <ptlib/critsec.h>
44
78 class PSemaphore : public PSync
79 {
80 PCLASSINFO(PSemaphore, PSync);
81
82 public:
89 PSemaphore(
90 unsigned initial,
91 unsigned maximum
92 );
93
96 PSemaphore(const PSemaphore &);
97
101 ~PSemaphore();
103
109 virtual void Wait();
110
117 virtual PBoolean Wait(
118 const PTimeInterval & timeout // Amount of time to wait for semaphore.
119 );
120
125 virtual void Signal();
127
128
129 // Include platform dependent part of class
130 #ifdef _WIN32
131 #include "msos/ptlib/semaphor.h"
132 #else
133 #include "unix/ptlib/semaphor.h"
134 #endif
135 };
136
137
138 #endif // PTLIB_SEMAPHORE_H
139
140
141 // End Of File ///////////////////////////////////////////////////////////////