How to implement software timers for C GNU code ?

Hi,

I searched and tried to compile some snippets and example codes from online but faced some problems.

Last one, this:

Timer framework in C - Code Review Stack Exchange

But got this error:

Quote:

---

sys/queue.h: No such file or directory

---

And I think the code is done for Linux.

I have windows 10, working on codeblocks GNU C programming.

Any suggestions ?

One or more of these.
Using Timer Queues - Win32 apps | Microsoft Docs
Using Timers - Win32 apps | Microsoft Docs
About Timers - Win32 apps | Microsoft Docs
SetTimer function (winuser.h) - Win32 apps | Microsoft Docs

Thank you so much for the links ! I tried the snippet and it worked, I got the timeout action.

But I want a simpler one, so I tried the "SetTimer" in this link:

SetTimer function (winuser.h) - Win32 apps | Microsoft Docs

I don't know what it's actually, a struct or a function, so I tried to initialize it, I read some of the information but didn't know how to work with it. I tried this code as a start.

Code:

---

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <inttypes.h>
#include "../soft_timers/soft_timers.h"
#include "../thread_a/thread_a.h"


void action1(void){
    printf("TimerRoutine action\n");
}


UINT_PTR SetTimer(
  HWND      hWnd,
  UINT_PTR  nIDEvent,
  UINT      uElapse,
  TIMERPROC lpTimerFunc
);




hWnd = NULL;
nIDEvent = NULL;
uElapse = 1000;
lpTimerFunc = action1;




int main()
{






    return 0;
}

---

> I don't know what it's actually, a struct or a function,
It's quite obviously a function.

OK, got this code to work.

Code:

---

/*        Title:        library manager
        Date:        Mon, 11 Jun 2021
*/
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <inttypes.h>


typedef void (*f_ptr)();


void CALLBACK action1(HWND hwnd, UINT uMsg, UINT timerId, DWORD dwTime){
    printf("TimerRoutine action\n");
}


f_ptr fptr;
int i = 0;


int main()
{
    MSG msg;


    fptr = action1;


    SetTimer(NULL,0,1000,fptr);




    while(1){
        if(GetMessage(&msg, NULL, 0, 0)) {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        i++;
        if(i > 4){break;}
    }


    return 0;
}

---

A note here is that:

Code:

---

TranslateMessage(&msg);

---

I don't know what it does but I commented it and the code works the same way, what it does exactly ?


===========================================
Now, is there a way to run a timer in the back ground and I can take it's time counts any time ?

I'm working on this one:

Code:

---

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <inttypes.h>




#define TIMER1 0
#define TIMER2 1


typedef void (*f_ptr)();


void CALLBACK action1(HWND hwnd, UINT uMsg, UINT timerId, DWORD dwTime){
    printf("action1\n");
}


void CALLBACK action2(HWND hwnd, UINT uMsg, UINT timerId, DWORD dwTime){
    printf("action2\n");
}


f_ptr fptr1;
f_ptr fptr2;


int i = 0;


int main()
{
    MSG msg1, msg2;


    fptr1 = action1;
    fptr2 = action2;


    SetTimer(NULL,TIMER1,1000,(TIMERPROC)fptr1);
    SetTimer(NULL,TIMER2,500,(TIMERPROC)fptr2);




    while(i < 3){
        if(GetMessage(&msg1, NULL, 0, 0)) { DispatchMessage(&msg1); }
        i++;
    }


    while(1){
        if(GetMessage(&msg2, NULL, 0, 0)) { DispatchMessage(&msg2); }
    }






    return 0;
}

---

Why the first while loop doesn't break or stop, I put a condition for its termination.

Loop 2 should run forever, but I thought loop 1 should break.

> I don't know what it does but I commented it and the code works the same way, what it does exactly ?
Read the M$ manual page for it.

> Why the first while loop doesn't break or stop, I put a condition for its termination.
Go back to the original message dispatch loop you had.

There is only one message dispatch loop in a windows program.

OK, I want to get the timer counting mode not time elapse mode as with the timeout.

I want the timer to run in the background and start running, counting from 0 to overflow and start again, not stopping.

And then, any time during program run, I read the timer count value.