A signal callback is installed only at the context level.
Signal callbacks are identified by adding the signal number on to the defined constant CS_SIGNAL_CB.
The following routine demonstrates how to install a signal callback:
/*
** INSTALLSIGNALCB
**
** This routine installs a signal callback for the
** specified signal
**
** Parameters:
** cp Context handle
** signo Signal number
** signalhandler Signal handler to install
**
** Returns:
** CS_SUCCEED Signal handler was installed
** successfully
** CS_FAIL An error was detected while
** installing the signal handler
*/
CS_RETCODE installsignalcb(cp, signo, signalhandler)
CS_CONTEXT *cp;
CS_INT signo;
CS_VOID *signalhandler;
{
CS_INT adjustedsigno;
CS_RETCODE ret;
/*
** Add the signal number to the CS_SIGNAL_CB
** define to indicate the signal number that this
** handler is being installed for.
*/
adjustedsigno = CS_SIGNAL_CB + signo;
ret = ct_callback(cp, (CS_CONNECTION *)NULL,
CS_SET, adjustedsigno, signalhandler);
return(ret);
}