1 /*
2 Copyright (C) 2005 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 __JackLibGlobals__
21 #define __JackLibGlobals__
22 
23 #include "JackShmMem.h"
24 #include "JackEngineControl.h"
25 #include "JackGlobals.h"
26 #include "JackPlatformPlug.h"
27 #include "JackGraphManager.h"
28 #include "JackMessageBuffer.h"
29 #include "JackTime.h"
30 #include "JackClient.h"
31 #include "JackError.h"
32 #include <assert.h>
33 #include <signal.h>
34 
35 #ifdef WIN32
36 #ifdef __MINGW32__
37 #include <sys/types.h>
38 typedef _sigset_t sigset_t;
39 #else
40 typedef HANDLE sigset_t;
41 #endif
42 #endif
43 
44 namespace Jack
45 {
46 
47 class JackClient;
48 
49 /*!
50 \brief Global library static structure: singleton kind of pattern.
51 */
52 
53 struct JackLibGlobals
54 {
55     JackShmReadWritePtr<JackGraphManager> fGraphManager;	/*! Shared memory Port manager */
56     JackShmReadWritePtr<JackEngineControl> fEngineControl;	/*! Shared engine control */  // transport engine has to be writable
57     JackSynchro fSynchroTable[CLIENT_NUM];                  /*! Shared synchro table */
58     JackMetadata *fMetadata;                                /*! Shared metadata base */
59     sigset_t fProcessSignals;
60 
61     static int fClientCount;
62     static JackLibGlobals* fGlobals;
63 
JackLibGlobalsJackLibGlobals64     JackLibGlobals()
65     {
66         jack_log("JackLibGlobals");
67         if (!JackMessageBuffer::Create()) {
68             jack_error("Cannot create message buffer");
69         }
70         fGraphManager = -1;
71         fEngineControl = -1;
72 
73         fMetadata = new JackMetadata(false);
74 
75         // Filter SIGPIPE to avoid having client get a SIGPIPE when trying to access a died server.
76     #ifdef WIN32
77         // TODO
78     #else
79         sigset_t signals;
80         sigemptyset(&signals);
81         sigaddset(&signals, SIGPIPE);
82         sigprocmask(SIG_BLOCK, &signals, &fProcessSignals);
83     #endif
84     }
85 
~JackLibGlobalsJackLibGlobals86     ~JackLibGlobals()
87     {
88         jack_log("~JackLibGlobals");
89         for (int i = 0; i < CLIENT_NUM; i++) {
90             fSynchroTable[i].Disconnect();
91         }
92         JackMessageBuffer::Destroy();
93 
94         delete fMetadata;
95         fMetadata = NULL;
96 
97        // Restore old signal mask
98     #ifdef WIN32
99        // TODO
100     #else
101        sigprocmask(SIG_BLOCK, &fProcessSignals, 0);
102     #endif
103     }
104 
InitJackLibGlobals105     static void Init()
106     {
107         if (!JackGlobals::fServerRunning && fClientCount > 0) {
108 
109             // Cleanup remaining clients
110             jack_error("Jack server was closed but clients are still allocated, cleanup...");
111             for (int i = 0; i < CLIENT_NUM; i++) {
112                 JackClient* client = JackGlobals::fClientTable[i];
113                 if (client) {
114                     jack_error("Cleanup client ref = %d", i);
115                     client->Close();
116                     delete client;
117                 }
118             }
119 
120             // Cleanup global context
121             fClientCount = 0;
122             delete fGlobals;
123             fGlobals = NULL;
124         }
125 
126         if (fClientCount++ == 0 && !fGlobals) {
127             jack_log("JackLibGlobals Init %x", fGlobals);
128             InitTime();
129             fGlobals = new JackLibGlobals();
130         }
131     }
132 
DestroyJackLibGlobals133     static void Destroy()
134     {
135         if (--fClientCount == 0 && fGlobals) {
136             jack_log("JackLibGlobals Destroy %x", fGlobals);
137             EndTime();
138             delete fGlobals;
139             fGlobals = NULL;
140         }
141     }
142 
143 };
144 
145 } // end of namespace
146 
147 #endif
148 
149