Timed Function in C

[jaro]

Hi folks,

I was wondering (while a program is running) how to make a specific codes/methods to run on a pre-defined time.
Lets say every 2 minutes this codes/methods ,inside the program, would be executed while the said program is still running.

I try searching about this topic through the net , but most of the decent result that I got is about creating a timer.

Any kind help, may it be psuedo code or links, will be much appreciated.

BTW: I'm using MVC6 and my OS is Win2k. the program mentioned here wait for incomming message.The codes/methods that I'm trying to run in a specific time is some sort of "is alive" message (to make sure that the connection between two computer is still on).


regards,
jaro

[teknomage1]

You need some sort of event processing loop that is the main function of the program, and some variable or object that is a timer. On each loop of your program you can check the status of the timer and once it hits the mark it can trigger your message checking function. In the main event loop you can also do the rest of program's work.

[QUantumAnenome]

In WinMain add this.

    SetTimer(hWnd, 0 /* id number */, 120000 /* milliseconds */, NULL);

In WndProc add this.

    switch(iMsg)
    {
    case WM_TIMER:
        if (wParam == 0)
        {
            // your stuff here
        }
        break;
    }

[jaro]

Hi everyone!
figure out the solution (thanks to some people over the net) . I would like to hear some comment about the solution that I've made.
here's the code: (note this is a test code, to be inserted to a working project)

#include <stdio.h>
#include <time.h>
#include <string.h>
#include <windows.h>

int x;
char WRITEFILE[50];
char string[200];

int x;
static DWORD	dwDelay = 60000; /* 60000 milliseconds = 60 seconds = 1 minute*/
static DWORD dwTickCount;



int writeToFile(char* str)
{
	FILE* log;

	strcpy(WRITEFILE,"C:\\Dummy.txt");

	log = fopen(WRITEFILE, "a+");
		if (log == NULL)
		{
			return -1;
		}
	fprintf(log, "%s\n",str);
	fclose(log);
	return 0;
}


int main()
{

	
	char timestamp[50];
	time_t t;
	t = time(NULL);

	printf("Start of testProgram.\n");
	writeToFile("Start of testProgram.");
	
	sprintf(timestamp,"%s",ctime(&t));
	timestamp[strlen(timestamp)-1] = '\0';
	writeToFile(timestamp);
	
	dwTickCount = GetTickCount();
	x=0;
	
		while(1)
		{
				if(GetTickCount() - dwTickCount > dwDelay) /* Has 60 seconds elapsed?*/
				{ 
					x++;
					printf("Round %d \n",x);		//print to console 
					sprintf(string,"Round %d",x);	//write to a file
					writeToFile(string);
					dwTickCount = GetTickCount();
				}//end if

		}//end while
	
}//end main

The program will (in every 1 minute) print to console and write to a file a series of increamenting Round.

any comment will be much appreciated.

regards,
jaro