Re: Timer function

[sanjay kumar <xs2sanjay@xxxxxxxxx>]

Hi,
find my response inline..

On 2/2/06, Adil Mujeeb <mujeeb.adil@xxxxxxxxx> wrote:
> Hi,
> Iam trying to set timer for two functions in a module using single
> timer_list. but only the second timer function is being called, probably the
> overriding the previous one.

Since there is only a single timer_list variable, it will get
overridden for sure on second initialisation.

> Is there any way to set the timer for multiple functions using same timer
> list?
> or we have to use separate timer_list structure for each one.
A single timer_list can hold info only for a single timer. For e.g it
has a field "unsigned long expires". The moment you will try to
initialise timer_list again with a new expire values, its value will
be overridden and only the new expire value will be there.

Its like assigning a value to a variable. Only the last value will be
held by the variable
So better use seperate timer_lists.

Regards,
Sanjay
>
> The sample code snippet :
>
> #include <linux/module.h>  /* Needed by all modules */
> #include <linux/kernel.h>  /* Needed for KERN_ALERT */
> #include <linux/timer.h>
> #include <linux/time.h>
>
> struct timer_list t1;
> void hello1();
> void hello2();
> extern unsigned long jiffies;
> void set_timer(struct timer_list *, void (*func)(),int );
> int init_module(void)
> {
>    printk("<1>Hello world 1.\n");
>
>   set_timer(&t1,hello1,3*HZ);
>    set_timer(&t1,hello2,6*HZ);
>    return 0;
> }
>
>
> void cleanup_module(void)
> {
>   printk(KERN_ALERT "Goodbye world 1.\n");
> }
>
> void set_timer(struct timer_list *tl, void (*func)(),int timer){
>         init_timer(tl);
>         tl->function = func;
>         tl->expires = jiffies + timer;
>         add_timer(tl);
> }
>
> void hello1(){
>   printk("Timer function hello1()\n");
> }
> void hello2(){
>   printk("Timer function hello2()\n");
> }
>
> Rgds,
> Adil

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