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 __JackMachSemaphore__
21 #define __JackMachSemaphore__
22 
23 #include "JackCompilerDeps.h"
24 #include "JackSynchro.h"
25 #include <mach/mach.h>
26 #include <servers/bootstrap.h>
27 #include <mach/semaphore.h>
28 
29 namespace Jack
30 {
31 
32 /*!
33 \brief Inter process synchronization using using Mach semaphore.
34 */
35 
36 class SERVER_EXPORT JackMachSemaphore : public detail::JackSynchro
37 {
38 
39     private:
40 
41         semaphore_t fSemaphore;
42         mach_port_t fBootPort;
43 
44         int fSharedMem;
45         char* fSharedName;
46 
47         bool recursiveBootstrapRegister(int counter);
48 
49     protected:
50 
51         void BuildName(const char* name, const char* server_name, char* res, int size);
52 
53     public:
54 
JackMachSemaphore()55         JackMachSemaphore():JackSynchro(), fSemaphore(0), fBootPort(0), fSharedMem(0), fSharedName(NULL)
56         {}
57 
58         bool Signal();
59         bool SignalAll();
60         bool Wait();
61         bool TimedWait(long usec);
62 
63         bool Allocate(const char* name, const char* server_name, int value);
64         bool Connect(const char* name, const char* server_name);
65         bool ConnectInput(const char* name, const char* server_name);
66         bool ConnectOutput(const char* name, const char* server_name);
67         bool Disconnect();
68         void Destroy();
69 };
70 
71 
72 } // end of namespace
73 
74 
75 #endif
76 
77