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Full Discussion: Multi threading?
Top Forums Programming Multi threading? Post 302119246 by enuenu on Tuesday 29th of May 2007 01:21:35 AM
Old 05-29-2007
Multi threading?
I am not sure if multi threading is the correct term, but here is what I am trying to do. I have a while loop that displays the number 1, pauses, displays the number 2, pauses , displays the number 3 ad infinitum. It just keeps counting.

While the screen displays the sequence of numbers counting up, I also want to display a prompt that says;
"Start counting now from: "
The user can then enter a number and the counter will immediately stop its counting and start counting again from the number entered by the user.

For example if the counter display is up to 22, as soon as the user enters 128 the counter jumps to 128 then continues counting up from 128. The user then enters 5, the counter jumps to 5 then continues counting up from 5.

Thus I need a while loop and a getchar() function to be running at the same time without interfering with each other. Any ideas how I could do this?

Here is the code for my loop, I can't work out where to put the statement
number = getchar();
so it doesn't interfere with the loop and delivers the new value of number instantaneously:


/* backtest02.c */

#include <curses.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>

int number = 1;
void quitter(void);

void quitter (void)
{
clear();
mvprintw(2,10, "Quitting...");
refresh();
sleep(4);
endwin();
exit(1);
}

int main ( void )
{
initscr();

while(1)
{
mvprintw (5,5, "%d", number);
refresh();
number = number + 1 ;
sleep(1);
signal (SIGINT, quitter);
}

}
 

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LEARN ABOUT OPENSOLARIS

sip_enable_counters

sip_enable_counters(3SIP)			   Session Initiation Protocol Library Functions			 sip_enable_counters(3SIP)

NAME

       sip_enable_counters, sip_disable_counters, sip_get_counter_value - counter operations

SYNOPSIS

       cc [ flag... ] file... -lsip [ library... ]
       #include <sip.h>

       int sip_enable_counters(int counter_group);

       int sip_disable_counters(int counter_group);

       int sip_get_counter_value(int group, int counter, void *counterval,
	    size_t counterlen);

DESCRIPTION

       The  sip_enable_counters()  function  enables  the  measurement	and counting of the selected counter group. The only allowed value for the
       counter_group is SIP_TRAFFIC_COUNTERS, which is defined in <sip.h>. Once enabled, the SIP stack starts measuring  end-to-end  SIP  traffic.
       The SIP stack keeps track of:

	   o	  the number of SIP requests sent and received (broken down by methods),

	   o	  the number of SIP responses sent and received (broken down by response codes), and

	   o	  the number of bytes sent and received.

       The  following  counters  are  defined  in  <sip.h>  for  the  SIP_TRAFFIC_COUNTERS  group.  These  counter  values are retrieved using the
       sip_get_counter_value() function.

	 SIP_TOTAL_BYTES_RCVD
	 SIP_TOTAL_BYTES_SENT
	 SIP_TOTAL_REQ_RCVD
	 SIP_TOTAL_REQ_SENT
	 SIP_TOTAL_RESP_RCVD
	 SIP_TOTAL_RESP_SENT
	 SIP_ACK_REQ_RCVD
	 SIP_ACK_REQ_SENT
	 SIP_BYE_REQ_RCVD
	 SIP_BYE_REQ_SENT
	 SIP_CANCEL_REQ_RCVD
	 SIP_CANCEL_REQ_SENT
	 SIP_INFO_REQ_RCVD
	 SIP_INFO_REQ_SENT
	 SIP_INVITE_REQ_RCVD
	 SIP_INVITE_REQ_SENT
	 SIP_NOTIFY_REQ_RCVD
	 SIP_NOTIFY_REQ_SENT
	 SIP_OPTIONS_REQ_RCVD
	 SIP_OPTIONS_REQ_SENT
	 SIP_PRACK_REQ_RCVD
	 SIP_PRACK_REQ_SENT
	 SIP_REFER_REQ_RCVD
	 SIP_REFER_REQ_SENT
	 SIP_REGISTER_REQ_RCVD
	 SIP_REGISTER_REQ_SENT
	 SIP_SUBSCRIBE_REQ_RCVD
	 SIP_SUBSCRIBE_REQ_SENT
	 SIP_UPDATE_REQ_RCVD
	 SIP_UPDATE_REQ_SENT
	 SIP_1XX_RESP_RCVD
	 SIP_1XX_RESP_SENT
	 SIP_2XX_RESP_RCVD
	 SIP_2XX_RESP_SENT
	 SIP_3XX_RESP_RCVD
	 SIP_3XX_RESP_SENT
	 SIP_4XX_RESP_RCVD
	 SIP_4XX_RESP_SENT
	 SIP_5XX_RESP_RCVD
	 SIP_5XX_RESP_SENT
	 SIP_6XX_RESP_RCVD
	 SIP_6xx_RESP_SENT
	 SIP_COUNTER_START_TIME  /* records time when counting was enabled */
	 SIP_COUNTER_STOP_TIME	 /* records time when counting was disabled */

       All of the above counters are defined to be uint64_t, except for SIP_COUNTER_START_TIME and SIP_COUNTER_STOP_TIME, which are defined to	be
       time_t.

       The  sip_disable_counters()  function  disables measurement and counting for the specified counter_group. When disabled, the counter values
       are not reset and are retained until the measurement is enabled again. Calling sip_enable_counters() again would reset all  counter  values
       to zero and counting would start afresh.

       The  sip_get_counter_value()  function retrieves the value of the specified counter within the specified counter group. The value is copied
       to the user provided buffer, counterval, of length counterlen. For example, after the following call, invite_rcvd would	have  the  correct
       value.

	 uint64_t invite_rcvd;

	 sip_get_counter_value(SIP_TRAFFIC_COUNTERS, SIP_INVITE_REQ_RCVD,
		 &invite_rcvd, sizeof (uint64_t));

RETURN VALUES

       Upon  successful  completion,  sip_enable_counters()  and sip_disable_counters() return 0. They will return EINVAL if an incorrect group is
       specified.

       Upon successful completion, sip_get_counter_value() returns 0. It  returns EINVAL if an incorrect counter name or counter  size	is  speci-
       fied, or if counterval is NULL.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

SunOS 5.11							    11 Jan 2008 					 sip_enable_counters(3SIP)
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