Hi all

I am developing a GUI application using GTK+ for my char driver.

And using pthread, write invoked to char interface driver and a signal handler is register for read interface call this is called once a signal notified from driver.

And also am using GTK widget like set a text in GTK edit box in my read signal handler.

Here i facing a problem of FUTEX lock in setting text in edit box after some runs.

If i do not set the text in edit it is passing, otherwise failing.

What could be reason for above failure?

Thanks

Well, since you don't post any of your code, any real error messages, or tell us what version/distro of Linux, GTK, etc., you're using, how can we tell, or even begin to try to help you??

Since you wrote the program, you're probably the best one to debug it.

Hi,


Here is my working env details.

Fedora core 7,kernel 2.6.21-1-3194, gcc version 4.1.2, GTK version Glade 2.12.1

My application running terminal shows as below,

#> Called ReceivePkt_Handler1
#> Event ID = 0
#> Length Received = 1
#> OverFlow Length = 0
#> Received data=a

After my app hangs, starce of my procees shows as below

#> strace -p 10682
#> Process 10682 attached - interrupt to quit
#> futex(0x4af5c9bc, FUTEX_WAIT, 2, NULL

code snippet is below
{
int i=0, j=0;
int bytes_rcvd,ret;
gchar *data;
unsigned long StaticStreamBuffer[4]={0,0,0,0};

gpstAppData1 ->s32Length = 4096;
gpstAppData1 ->s8CPortID = gConnectionInfoRx[0]->LocalCPortID;
gpstAppData1->s8DeviceID = gConnectionInfoRx[0]->LocalDeviceID;
gpstAppData1->s8Priority = gConnectionInfoRx[0]->Priority;
gpstAppData1->s8E2EEnabled = gConnectionInfoRx[0]->E2EEnabled;
printf("Called ReceivePkt_Handler1\n");

StaticStreamBuffer[0] = gConnectionInfoRx[0]->LocalCPortID;
StaticStreamBuffer[1] = gConnectionInfoRx[0]->LocalDeviceID;

ret = ioctl(gConnectionInfoRx[0]->filedes, UNI_GET_EVENTINFO, StaticStreamBuffer);
if(ret < 0)
{
printf("Ioctl Failed\n");
return;
}

printf("Event ID = %d\n",StaticStreamBuffer[0]);
printf("Length Received = %d\n",StaticStreamBuffer[1]);
printf("OverFlow Length = %d\n",StaticStreamBuffer[2]);

gpstAppData1 ->s32Length =StaticStreamBuffer[1] + + StaticStreamBuffer[2];
bytes_rcvd = read(gConnectionInfoRx[0]->filedes, gpstAppData1, gpstAppData1->s32Length);
gConnectionInfoRx[0]->bytes_rcvd+= bytes_rcvd ;

data=(gchar *)gpstAppData1->aBuffer;
printf("Received data=%s\n",(unsigned char *)gpstAppData1->aBuffer);
gtk_entry_set_text(GTK_ENTRY(receive_bytetx),data);
pos_at_receive += strlen(data);
memset(gpstAppData1->aBuffer,'0',bytes_rcvd);

}


Actually i am facing this problem after certain runs(~5-10).

If comment the line "gtk_entry_set_text(GTK_ENTRY(receive_bytetx),data);" in code, am able pass code successfully at many number of time.


Thanks