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digitalmars.D - Get any time in milliseconds?

reply Benjamin Schulte <Aldoric gmx.de> writes:
Hi.
I'm currently trying to convert my application to linux.
Now I had a counter in my application that counted in milliseconds the time
since the application started. I have to port this to linux.

On windows I used the PerformanceCounter from the WinAPI (or the GetTickCount
method, if the performance-counter is not supported).

Well, I would like to have it more OS-independent or at least working somehow
in linux.
I tried the std.date, but actually I would have to calculate the ms-value up
from the splitted values (hours, days, etc). That would be kinda complicated,
cause there are too many special things. Like some month only have 30 days,
sometimes 28, etc.
Then I found the std.c.time clock() method, but realized, that that maybe wraps
very early, cause one second is 1000000 and the value is stored in an integer.
that would mean that after ~36 minutes the timer would wrap to zero (or minus
something?) again. That's not helpful.

So, now I'm looking for an alternate way to realize what I want. I just want
ANY time counter in milliseconds. I can calculate it down to any base I want,
but I just need a time~

Thanks in advance for any help
Apr 13 2008
next sibling parent downs <default_357-line yahoo.de> writes:
Benjamin Schulte wrote:

 Hi.
 I'm currently trying to convert my application to linux.
 Now I had a counter in my application that counted in milliseconds the time
since the application started. I have to port this to linux.
 
 On windows I used the PerformanceCounter from the WinAPI (or the GetTickCount
method, if the performance-counter is not supported).
 
 Well, I would like to have it more OS-independent or at least working somehow
in linux.
 I tried the std.date, but actually I would have to calculate the ms-value up
from the splitted values (hours, days, etc). That would be kinda complicated,
cause there are too many special things. Like some month only have 30 days,
sometimes 28, etc.
 Then I found the std.c.time clock() method, but realized, that that maybe
wraps very early, cause one second is 1000000 and the value is stored in an
integer. that would mean that after ~36 minutes the timer would wrap to zero
(or minus something?) again. That's not helpful.
 
 So, now I'm looking for an alternate way to realize what I want. I just want
ANY time counter in milliseconds. I can calculate it down to any base I want,
but I just need a time~
 
 Thanks in advance for any help


I quote from tools.time:

  extern(C) {
    struct timeval {
      uint tv_sec;
      int tv_usec;
    }
    int gettimeofday(timeval *, void *);
    d_time µsec() {
      timeval tv = void;
      gettimeofday(&tv, null);
      return tv.tv_sec*1_000_000 + tv.tv_usec;
    }
  }

Contrary to its name:

       and gives the number of seconds and microseconds since the  Epoch  (see
       time(2)).
	--man gettimeofday

DESCRIPTION
       time()  returns  the  time  since  the  Epoch (00:00:00 UTC, January 1,
       1970), measured in seconds.
	--man 2 time

Hope that answers your question.

 --downs
Apr 13 2008
prev sibling next sibling parent "Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
"Benjamin Schulte" <Aldoric gmx.de> wrote in message 
news:ftst9o$sql$1 digitalmars.com...

 Hi.
 I'm currently trying to convert my application to linux.
 Now I had a counter in my application that counted in milliseconds the 
 time since the application started. I have to port this to linux.

 On windows I used the PerformanceCounter from the WinAPI (or the 
 GetTickCount method, if the performance-counter is not supported).

 Well, I would like to have it more OS-independent or at least working 
 somehow in linux.
 I tried the std.date, but actually I would have to calculate the ms-value 
 up from the splitted values (hours, days, etc). That would be kinda 
 complicated, cause there are too many special things. Like some month only 
 have 30 days, sometimes 28, etc.
 Then I found the std.c.time clock() method, but realized, that that maybe 
 wraps very early, cause one second is 1000000 and the value is stored in 
 an integer. that would mean that after ~36 minutes the timer would wrap to 
 zero (or minus something?) again. That's not helpful.

 So, now I'm looking for an alternate way to realize what I want. I just 
 want ANY time counter in milliseconds. I can calculate it down to any base 
 I want, but I just need a time~

 Thanks in advance for any help


std.date.getUTCtime() gives you I believe millisecond-precise time as a long 
(64-bit int).
Apr 13 2008
prev sibling parent reply Walter Bright <newshound1 digitalmars.com> writes:
Benjamin Schulte wrote:

 On windows I used the PerformanceCounter from the WinAPI (or the
 GetTickCount method, if the performance-counter is not supported).


The last example shows how to access the hardware timer:

http://www.digitalmars.com/techtips/timing_code.html
Apr 13 2008
parent reply Bill Baxter <dnewsgroup billbaxter.com> writes:
Walter Bright wrote:

 Benjamin Schulte wrote:

 On windows I used the PerformanceCounter from the WinAPI (or the
 GetTickCount method, if the performance-counter is not supported).


 
 The last example shows how to access the hardware timer:
 
 http://www.digitalmars.com/techtips/timing_code.html


What's up with std.perf?  It's been in Phobos in "stealth mode" forever. 
  Seems to work fine on Windows.  Any chance it'll become official at 
some point?  Why isn't it official now?

--bb
Apr 13 2008
parent reply Walter Bright <newshound1 digitalmars.com> writes:
Bill Baxter wrote:

 What's up with std.perf?  It's been in Phobos in "stealth mode" forever. 
  Seems to work fine on Windows.  Any chance it'll become official at 
 some point?  Why isn't it official now?


Nobody has spent the time on it.
Apr 13 2008
parent reply Bill Baxter <dnewsgroup billbaxter.com> writes:
Walter Bright wrote:

 Bill Baxter wrote:

 What's up with std.perf?  It's been in Phobos in "stealth mode" 
 forever.  Seems to work fine on Windows.  Any chance it'll become 
 official at some point?  Why isn't it official now?


 
 Nobody has spent the time on it.


Well, what's missing?
Works fine on Windows, has lots of versions() for linux, so I assume it 
probably works there.

You just need someone to say that yeh, it tests out ok?

--bb
Apr 13 2008
parent reply "Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
"Bill Baxter" <dnewsgroup billbaxter.com> wrote in message 
news:ftts2j$2mom$1 digitalmars.com...

 Walter Bright wrote:

 Bill Baxter wrote:

 What's up with std.perf?  It's been in Phobos in "stealth mode" forever. 
 Seems to work fine on Windows.  Any chance it'll become official at some 
 point?  Why isn't it official now?


 Nobody has spent the time on it.


 Well, what's missing?
 Works fine on Windows, has lots of versions() for linux, so I assume it 
 probably works there.

 You just need someone to say that yeh, it tests out ok?

 --bb


AFAICT PerformanceCounter works fine on Linux.  I've used it.
Apr 13 2008
parent reply Walter Bright <newshound1 digitalmars.com> writes:
Jarrett Billingsley wrote:

 AFAICT PerformanceCounter works fine on Linux.  I've used it. 


It also needs to be converted to ddoc.
Apr 13 2008
parent reply Bill Baxter <dnewsgroup billbaxter.com> writes:
Walter Bright wrote:

 Jarrett Billingsley wrote:

 AFAICT PerformanceCounter works fine on Linux.  I've used it. 


 
 It also needs to be converted to ddoc.


That's easy.  I'll do that if you'll agree to put it in.

--bb
Apr 13 2008
parent Walter Bright <newshound1 digitalmars.com> writes:
Bill Baxter wrote:

 Walter Bright wrote:

 Jarrett Billingsley wrote:

 AFAICT PerformanceCounter works fine on Linux.  I've used it. 


 It also needs to be converted to ddoc.


 
 That's easy.  I'll do that if you'll agree to put it in.


How can I say no? <g>
Apr 14 2008