1 /*
2  Copyright (C) 2004-2008 Grame
3 
4  This program is free software; you can redistribute it and/or modify
5  it under the terms of the GNU Lesser General Public License as published by
6  the Free Software Foundation; either version 2.1 of the License, or
7  (at your option) any later version.
8 
9  This program is distributed in the hope that it will be useful,
10  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  GNU Lesser General Public License for more details.
13 
14  You should have received a copy of the GNU Lesser General Public License
15  along with this program; if not, write to the Free Software
16  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 
18 */
19 
20 #ifndef __JackWinProcessSync__
21 #define __JackWinProcessSync__
22 
23 #include "JackWinMutex.h"
24 
25 namespace Jack
26 {
27 
28 /*!
29 \brief A synchronization primitive built using a condition variable.
30 */
31 
32 class JackWinProcessSync : public JackWinMutex
33 {
34 
35     private:
36 
37         HANDLE fEvent;
38 
39     public:
40 
JackWinMutex(name)41         JackWinProcessSync(const char* name = NULL):JackWinMutex(name)
42         {
43             if (name) {
44                 char buffer[MAX_PATH];
45                 snprintf(buffer, sizeof(buffer), "%s_%s", "JackWinProcessSync", name);
46                 fEvent = CreateEvent(NULL, TRUE, FALSE, buffer);  // Needs ResetEvent
47                 //fEvent = CreateEvent(NULL, FALSE, FALSE, buffer);   // Auto-reset event
48             } else {
49                 fEvent = CreateEvent(NULL, TRUE, FALSE, NULL);   // Needs ResetEvent
50                 //fEvent = CreateEvent(NULL, FALSE, FALSE, NULL);   // Auto-reset event
51             }
52 
53             ThrowIf((fEvent == 0), JackException("JackWinProcessSync: could not init the event"));
54         }
~JackWinProcessSync()55         virtual ~JackWinProcessSync()
56         {
57             CloseHandle(fEvent);
58         }
59 
60         bool TimedWait(long usec);
61         bool LockedTimedWait(long usec);
62 
63         void Wait();
64         void LockedWait();
65 
66         void Signal();
67         void LockedSignal();
68 
69         void SignalAll();
70         void LockedSignalAll();
71 };
72 
73 } // end of namespace
74 
75 #endif
76 
77