summaryrefslogtreecommitdiff
path: root/common/JackLibGlobals.h
blob: bca775a37516d6440c508ae13730093764057ac1 (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
/*
Copyright (C) 2005 Grame

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

*/

#ifndef __JackLibGlobals__
#define __JackLibGlobals__

#include "JackShmMem.h"
#include "JackEngineControl.h"
#include "JackGlobals.h"
#include "JackPlatformPlug.h"
#include "JackGraphManager.h"
#include "JackMessageBuffer.h"
#include "JackTime.h"
#include "JackClient.h"
#include "JackError.h"
#include <assert.h>
#include <signal.h>

#ifdef WIN32
#ifdef __MINGW32__
#include <sys/types.h>
typedef _sigset_t sigset_t;
#else
typedef HANDLE sigset_t;
#endif
#endif

namespace Jack
{

class JackClient;

/*!
\brief Global library static structure: singleton kind of pattern.
*/

struct JackLibGlobals
{
    JackShmReadWritePtr<JackGraphManager> fGraphManager;	/*! Shared memory Port manager */
    JackShmReadWritePtr<JackEngineControl> fEngineControl;	/*! Shared engine control */  // transport engine has to be writable
    JackSynchro fSynchroTable[CLIENT_NUM];                  /*! Shared synchro table */
    JackMetadata *fMetadata;                                /*! Shared metadata base */
    sigset_t fProcessSignals;

    static int fClientCount;
    static JackLibGlobals* fGlobals;

    JackLibGlobals()
    {
        jack_log("JackLibGlobals");
        if (!JackMessageBuffer::Create()) {
            jack_error("Cannot create message buffer");
        }
        fGraphManager = -1;
        fEngineControl = -1;

        fMetadata = new JackMetadata(false);

        // Filter SIGPIPE to avoid having client get a SIGPIPE when trying to access a died server.
    #ifdef WIN32
        // TODO
    #else
        sigset_t signals;
        sigemptyset(&signals);
        sigaddset(&signals, SIGPIPE);
        sigprocmask(SIG_BLOCK, &signals, &fProcessSignals);
    #endif
    }

    ~JackLibGlobals()
    {
        jack_log("~JackLibGlobals");
        for (int i = 0; i < CLIENT_NUM; i++) {
            fSynchroTable[i].Disconnect();
        }
        JackMessageBuffer::Destroy();

        delete fMetadata;
        fMetadata = NULL;

       // Restore old signal mask
    #ifdef WIN32
       // TODO
    #else
       sigprocmask(SIG_BLOCK, &fProcessSignals, 0);
    #endif
    }

    static void Init()
    {
        if (!JackGlobals::fServerRunning && fClientCount > 0) {

            // Cleanup remaining clients
            jack_error("Jack server was closed but clients are still allocated, cleanup...");
            for (int i = 0; i < CLIENT_NUM; i++) {
                JackClient* client = JackGlobals::fClientTable[i];
                if (client) {
                    jack_error("Cleanup client ref = %d", i);
                    client->Close();
                    delete client;
                }
            }

            // Cleanup global context
            fClientCount = 0;
            delete fGlobals;
            fGlobals = NULL;
        }

        if (fClientCount++ == 0 && !fGlobals) {
            jack_log("JackLibGlobals Init %x", fGlobals);
            InitTime();
            fGlobals = new JackLibGlobals();
        }
    }

    static void Destroy()
    {
        if (--fClientCount == 0 && fGlobals) {
            jack_log("JackLibGlobals Destroy %x", fGlobals);
            EndTime();
            delete fGlobals;
            fGlobals = NULL;
        }
    }

};

} // end of namespace

#endif