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HI,
In my Qt project, i have a thread to connect server. when i write the code with
connect(sockfd,...)
Qt is assuming it, as the connect , which is used to connect signals and slots:confused::confused:
so how should i differentiate that???
Thnx in advance;
Try ::connect(...) and QObject::connect()
i dont want the slots connect.
i need the tcp connect but qt is taking this connect as the slots and giving the error...
i tried .. but no use
are you sure you are include the correct headers for socket programming? ::connect() should work fine
Yes,
i am already using in the Main.cpp..
so if it fails to connect in main.cpp .
i have to reconnect so, i am implementing in separate thread to connect again.
but i am getting the above problem which i mentioned.
if you use Qt, why don't you use QtNetwork module instead of using std functions?
i dont have any idea about the QtNetwork modules.
moreover i have already used std fnctions in main.cpp . it worked well
but in separate thread it is using the slot connect.
why ?
read this.Quote:
Originally Posted by qtlinuxnewbie
show us compilable example which reproduces the problem.Quote:
Originally Posted by qtlinuxnewbie
Show your code, then we can tell why. Probably you aren't using ::connect().
This is main.cpp
Quote:
#include <QtGui/QApplication>
#include "vms.h"
#include "ConnectServer.h"
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <QMessageBox>
#include <QFile>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <stdint.h>
#include <assert.h>
#include "defines.h"
#include "structs.h"
#include "tsadc.h"
int thresholdValuesem;
void *cThresholdValueAddrs;
key_t semkey;
int shmid;
key_t key;
int gnSampleFactor;
int sockfd;
struct sockaddr_in serv_addr;
struct hostent *host_name;
int SERV_TCP_PORT;
char SERV_HOST_ADDR[20];
char gcPassword[20];
int gnConnectFailed;
tsadc adc;
int main(int argc, char *argv[])
{
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family =AF_INET;
serv_addr.sin_addr.s_addr =inet_addr(SERV_HOST_ADDR);
serv_addr.sin_port =htons(SERV_TCP_PORT);
/*open a TCP socket */
if((sockfd=socket(AF_INET,SOCK_STREAM,0)) < 0)
{
vmslog << "VmsERROR:can't open stream socket" << "\n";
vmslog.flush();
}
/*connect to the server*/
if((gnConnectFailed=connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr))) == -1)
{
vmslog << "VmsERROR:can't connect to server" << "\n";
vmslog.flush();
}
QApplication a(argc, argv);
vms w;
w.show();
return a.exec();
}
this is the thread.cpp
Quote:
#include "ConnectServer.h"
#include <QThread>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/ipc.h>
#include <netdb.h>
#include <QMessageBox>
extern int sockfd;
extern struct sockaddr_in serv_addr;
extern int gnConnectFailed;
extern struct hostent *host_name;
extern int SERV_TCP_PORT;
extern char SERV_HOST_ADDR[20];
ConnectServerThread::ConnectServerThread()
{
}
void ConnectServerThread::connectServer()
{
while(gnConnectFailed==-1)
{
/*Reconnect to the server*/
if((gnConnectFailed=connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr))) == -1)
{
//Connection Failed
}
}
}
did you try to write like this?
Code:
i tried in the above manner
successful in compilation. .
but it is still taking the slots connect.(i can say this, as it gives the IntelliSense ).
set a break point in the slot which is called and look at trace log.
can you also prepare minimal compilable project which we can build by ourself?
thnk u for ur support ..
i think it takes hrs to do .. but i wil try
is there any way..?
IntelliSense is the most retarded completion system ever. Don't trust it to show exactly what the compiler thinks.Quote:
Originally Posted by qtlinuxnewbie
::connect will work - ignore Visual studio and Intellisense. Test your app instead.