The D way of implementing a timer? I need to (automatically) execute a function that performs a clean up, say every hour.

if (file.older than 1 hour) {
    remove;
}

On Monday, 17 February 2014 at 11:08:16 UTC, Chris wrote:
> The D way of implementing a timer? I need to (automatically) execute a function that performs a clean up, say every hour.
>
> if (file.older than 1 hour) {
>     remove;
> }

Vibe.d can be used for this to get an OS agnostic solution.
Haven't used it myself, but this function seems to be what you are looking for: https://github.com/rejectedsoftware/vibe.d/blob/master/source/vibe/core/core.d#L342

On Monday, 17 February 2014 at 11:11:06 UTC, simendsjo wrote:
> On Monday, 17 February 2014 at 11:08:16 UTC, Chris wrote:
>> The D way of implementing a timer? I need to (automatically) execute a function that performs a clean up, say every hour.
>>
>> if (file.older than 1 hour) {
>>    remove;
>> }
>
> Vibe.d can be used for this to get an OS agnostic solution.
> Haven't used it myself, but this function seems to be what you are looking for: https://github.com/rejectedsoftware/vibe.d/blob/master/source/vibe/core/core.d#L342

Great, it's for a vibe.d project anyway, it might do the trick.

Out of interest, if there's a phobos way, let me know.

On Monday, 17 February 2014 at 11:20:05 UTC, Chris wrote:
> On Monday, 17 February 2014 at 11:11:06 UTC, simendsjo wrote:
>> On Monday, 17 February 2014 at 11:08:16 UTC, Chris wrote:
>>> The D way of implementing a timer? I need to (automatically) execute a function that performs a clean up, say every hour.
>>>
>>> if (file.older than 1 hour) {
>>>   remove;
>>> }
>>
>> Vibe.d can be used for this to get an OS agnostic solution.
>> Haven't used it myself, but this function seems to be what you are looking for: https://github.com/rejectedsoftware/vibe.d/blob/master/source/vibe/core/core.d#L342
>
> Great, it's for a vibe.d project anyway, it might do the trick.
>
> Out of interest, if there's a phobos way, let me know.

This works (in vibe.d):

auto timer = setTimer(1.seconds, toDelegate(&clearDir), true);

On Monday, 17 February 2014 at 11:20:05 UTC, Chris wrote:
> On Monday, 17 February 2014 at 11:11:06 UTC, simendsjo wrote:
>> On Monday, 17 February 2014 at 11:08:16 UTC, Chris wrote:
>>> The D way of implementing a timer? I need to (automatically) execute a function that performs a clean up, say every hour.
>>>
>>> if (file.older than 1 hour) {
>>>   remove;
>>> }
>>
>> Vibe.d can be used for this to get an OS agnostic solution.
>> Haven't used it myself, but this function seems to be what you are looking for: https://github.com/rejectedsoftware/vibe.d/blob/master/source/vibe/core/core.d#L342
>
> Great, it's for a vibe.d project anyway, it might do the trick.
>
> Out of interest, if there's a phobos way, let me know.

You could have a separate thread used just for this that sleeps most of the time.

Am 17.02.2014 12:20, schrieb Chris:
> On Monday, 17 February 2014 at 11:11:06 UTC, simendsjo wrote:
>> On Monday, 17 February 2014 at 11:08:16 UTC, Chris wrote:
>>> The D way of implementing a timer? I need to (automatically) execute a function that performs a clean up, say every hour.
>>>
>>> if (file.older than 1 hour) {
>>>    remove;
>>> }
>>
>> Vibe.d can be used for this to get an OS agnostic solution.
>> Haven't used it myself, but this function seems to be what you are
>> looking for:
>> https://github.com/rejectedsoftware/vibe.d/blob/master/source/vibe/core/core.d#L342
>>
> 
> Great, it's for a vibe.d project anyway, it might do the trick.
> 
> Out of interest, if there's a phobos way, let me know.

https://github.com/Dav1dde/BraLa/blob/master/brala/utils/thread.d#L50-L95

On Monday, 17 February 2014 at 11:08:16 UTC, Chris wrote:
> The D way of implementing a timer? I need to (automatically) execute a function that performs a clean up, say every hour.
>
> if (file.older than 1 hour) {
>     remove;
> }

Here is a quick timer implementation that you can improve yourself:

import std.stdio;
import core.thread;

class ChrisTimer : Thread {
    private void delegate() funcToRun;
    private long timeToWait;
    private bool done = false;
    private int noSheep;
    private Duration howLong;

    // We could make any function a parameter to ChrisTimer if we had a
    // constructor like:
    // this(void delegate() dg, long ms) {

    this(long ms) {
        funcToRun = &doSomething;
        timeToWait = ms;
        howLong = dur!("msecs")(timeToWait);
        funcToRun = &doSomething;
        super(&run);
    }

    private void run() {
        while (isRunning && !done) {
            funcToRun();
            sleep(howLong);
        }
    }

    // Example function that is just going to count sheep (up to 10).
    public void doSomething() {
        ++noSheep;
        writeln("Counted ", noSheep, " sheep.");
        if (noSheep >= 10) {
            done = true;
        }
    }

} // ChrisThread class

int main(string[] args) {
    auto ct = new ChrisTimer(2000);
    ct.start();

    return 0;
}

On Monday, 17 February 2014 at 12:03:39 UTC, Dejan Lekic wrote:
> On Monday, 17 February 2014 at 11:08:16 UTC, Chris wrote:
>> The D way of implementing a timer? I need to (automatically) execute a function that performs a clean up, say every hour.
>>
>> if (file.older than 1 hour) {
>>    remove;
>> }
>
> Here is a quick timer implementation that you can improve yourself:
>
> import std.stdio;
> import core.thread;
>
> class ChrisTimer : Thread {
>     private void delegate() funcToRun;
>     private long timeToWait;
>     private bool done = false;
>     private int noSheep;
>     private Duration howLong;
>
>     // We could make any function a parameter to ChrisTimer if we had a
>     // constructor like:
>     // this(void delegate() dg, long ms) {
>
>     this(long ms) {
>         funcToRun = &doSomething;
>         timeToWait = ms;
>         howLong = dur!("msecs")(timeToWait);
>         funcToRun = &doSomething;
>         super(&run);
>     }
>
>     private void run() {
>         while (isRunning && !done) {
>             funcToRun();
>             sleep(howLong);
>         }
>     }
>
>     // Example function that is just going to count sheep (up to 10).
>     public void doSomething() {
>         ++noSheep;
>         writeln("Counted ", noSheep, " sheep.");
>         if (noSheep >= 10) {
>             done = true;
>         }
>     }
>
> } // ChrisThread class
>
> int main(string[] args) {
>     auto ct = new ChrisTimer(2000);
>     ct.start();
>
>     return 0;
> }

Great stuff, thanks for the code example. I feel flattered to have my own ChrisTimer now. I'll see which implementation is better suited for the task (vibe.d's setTimer or my own thread based on your example).