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
|
#include "ipcmessage.h"
#include <QDebug>
#include "appglobal.h"
#include<string.h>
#include<time.h>
#include<sys/ipc.h>
#include<sys/msg.h>
#include<sys/wait.h>
#include<sys/errno.h>
//extern int errno; // error NO.
ipcMessage::ipcMessage(int messageKey)
{
key=messageKey;
messageQId = msgget(key, MSGPERM|IPC_CREAT);
if(messageQId<0) errorOut() << "IPC Error" << strerror(errno);
}
ipcMessage::~ipcMessage()
{
closeQueue();
}
bool ipcMessage::sendMessage(QString t)
{
if(messageQId<0) return false;
int len;
// message to send
msgBuf.mtype = MTYPE; // set the type of message
strncpy(msgBuf.mtext,t.toLatin1().data(),MSGTXMAXLEN-1);
len=strlen(msgBuf.mtext);
// send the message to queue
rc = msgsnd(messageQId, &msgBuf, len+1, IPC_NOWAIT);
if (rc < 0)
{
if(rc<0) errorOut() << "IPC Error" << strerror(errno);
return false;
}
return true;
}
bool ipcMessage::receiveMessage(QString &t)
{
if(messageQId<0) return false;
// read the message from queue
rc = msgrcv(messageQId, &msgBuf, sizeof(msgBuf.mtext), 0, IPC_NOWAIT);
if (rc < -1)
{
if(rc<0) errorOut() << "IPC Error" << strerror(errno);
return false;
}
if(rc>=0)
{
t=msgBuf.mtext;
return true;
}
return false;
}
bool ipcMessage::closeQueue()
{
// remove the queue
rc=msgctl(messageQId,IPC_RMID,NULL);
if (rc < 0)
{
if(rc<0) errorOut() << "IPC Error" << strerror(errno);
return false;
}
return 0;
}
|
