1 // The MIT License (MIT)
2 //
3 // Copyright (c) Itay Grudev 2015 - 2016
4 //
5 // Permission is hereby granted, free of charge, to any person obtaining a copy
6 // of this software and associated documentation files (the "Software"), to deal
7 // in the Software without restriction, including without limitation the rights
8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 // copies of the Software, and to permit persons to whom the Software is
10 // furnished to do so, subject to the following conditions:
11 //
12 // The above copyright notice and this permission notice shall be included in
13 // all copies or substantial portions of the Software.
14 //
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 // THE SOFTWARE.
22 
23 //
24 //  W A R N I N G !!!
25 //  -----------------
26 //
27 // This file is not part of the SingleApplication API. It is used purely as an
28 // implementation detail. This header file may change from version to
29 // version without notice, or may even be removed.
30 //
31 
32 #ifndef SINGLEAPPLICATION_P_H
33 #define SINGLEAPPLICATION_P_H
34 
35 #include <QtCore/QSharedMemory>
36 #include <QtNetwork/QLocalServer>
37 #include <QtNetwork/QLocalSocket>
38 #include "singleapplication.h"
39 
40 struct InstancesInfo {
41     bool primary;
42     quint32 secondary;
43     qint64 primaryPid;
44     quint16 checksum;
45 };
46 
47 struct ConnectionInfo {
ConnectionInfoConnectionInfo48     explicit ConnectionInfo() :
49         msgLen(0), instanceId(0), stage(0) {}
50     qint64 msgLen;
51     quint32 instanceId;
52     quint8 stage;
53 };
54 
55 class SingleApplicationPrivate : public QObject {
56 Q_OBJECT
57 public:
58     enum ConnectionType : quint8 {
59         InvalidConnection = 0,
60         NewInstance = 1,
61         SecondaryInstance = 2,
62         Reconnect = 3
63     };
64     enum ConnectionStage : quint8 {
65         StageHeader = 0,
66         StageBody = 1,
67         StageConnected = 2,
68     };
69     Q_DECLARE_PUBLIC(SingleApplication)
70 
71     SingleApplicationPrivate( SingleApplication *q_ptr );
72      ~SingleApplicationPrivate();
73 
74     void genBlockServerName();
75     void initializeMemoryBlock();
76     void startPrimary();
77     void startSecondary();
78     void connectToPrimary(int msecs, ConnectionType connectionType );
79     quint16 blockChecksum();
80     qint64 primaryPid();
81     void readInitMessageHeader(QLocalSocket *socket);
82     void readInitMessageBody(QLocalSocket *socket);
83 
84     SingleApplication *q_ptr;
85     QSharedMemory *memory;
86     QLocalSocket *socket;
87     QLocalServer *server;
88     quint32 instanceNumber;
89     QString blockServerName;
90     SingleApplication::Options options;
91     QMap<QLocalSocket*, ConnectionInfo> connectionMap;
92 
93 public Q_SLOTS:
94     void slotConnectionEstablished();
95     void slotDataAvailable( QLocalSocket*, quint32 );
96     void slotClientConnectionClosed( QLocalSocket*, quint32 );
97 };
98 
99 #endif // SINGLEAPPLICATION_P_H
100