delay

[asit]

In my multi threaded application(win dows), I have several infinite
loop(though it's not good to have...but I need them). Hence they eat
nearly 98% of CPU time(it shows in task manager).

I have decided to put a delay of 200 ms in the program. But
unfortunately my Compiler(Borlan d 5.5) is not providing any such
functionalities .

In my research, I found that many (lame) people put delay by putting
unnecessary instructions in the delay block....like this

void delay()
{
int i=0,j=10;
for(i=0;i<12345 678;i++)
j *=j;
}

But it won't do my job. But I have found that by doing some kind of
signal handling, I can create my delay function.

Does such functionality is available in windows ????
How can I implement it ????

[Antoninus Twink]

Re: delay

On 7 Oct 2008 at 7:13, asit wrote:

In my multi threaded application(win dows), I have several infinite
loop(though it's not good to have...but I need them). Hence they eat
nearly 98% of CPU time(it shows in task manager).
>
I have decided to put a delay of 200 ms in the program. But
unfortunately my Compiler(Borlan d 5.5) is not providing any such
functionalities .
>
But it won't do my job. But I have found that by doing some kind of
signal handling, I can create my delay function.
>
Does such functionality is available in windows ????
How can I implement it ????

On POSIX systems, the function you're looking for is called sleep(3) and
can be implemented using the SIGALRM signal.

Doing a Google search for
"Windows API" sleep
shows that the corresponding Windows function is called Sleep with a
capital S, and takes a long int argument specifying the length of time
to wait in milliseconds.

[Ian Collins]

Re: delay

Antoninus Twink wrote:

On 7 Oct 2008 at 7:13, asit wrote:

>In my multi threaded application(win dows), I have several infinite
>loop(though it's not good to have...but I need them). Hence they eat
>nearly 98% of CPU time(it shows in task manager).
>>
>I have decided to put a delay of 200 ms in the program. But
>unfortunatel y my Compiler(Borlan d 5.5) is not providing any such
>functionalitie s.
>>
>But it won't do my job. But I have found that by doing some kind of
>signal handling, I can create my delay function.
>>
>Does such functionality is available in windows ????
>How can I implement it ????

>
On POSIX systems, the function you're looking for is called sleep(3) and
can be implemented using the SIGALRM signal.
>

Utter nonsense. sleep(3) suspendeds execution for a number of seconds.
The correct POSIX function would be nanosleep(). SIGALRM is a total
red herring.

--
Ian Collins.

[Antoninus Twink]

Re: delay

On 7 Oct 2008 at 7:48, Ian Collins wrote:

Antoninus Twink wrote:

>On POSIX systems, the function you're looking for is called sleep(3)
>and can be implemented using the SIGALRM signal.
>>

Utter nonsense. sleep(3) suspendeds execution for a number of
seconds. The correct POSIX function would be nanosleep().

As usual, you deliberately misunderstand.

The OP's question was about Windows, and the only point of mentioning
POSIX was to find the correct synonymn for delay (namely sleep) that
results in a successful Google search.

Try googling
"Windows API" nanosleep
and see how useful the results are.

SIGALRM is a total red herring.

The OP asked whether delay functions can be implemented using signals.
In principle, the answer is clearly yes, as demonstrated by alarm(2).
The fact that its argument is a time in seconds doesn't change the fact
that it works by delivering a SIGALRM to the calling process.

[asit]

Re: delay

The problem is that i don't use Visual C++, I use Borland C++ 5.0.

[Antoninus Twink]

Re: delay

On 7 Oct 2008 at 8:33, asit wrote:

The problem is that i don't use Visual C++, I use Borland C++ 5.0.

Surely you can access the Windows standard library with any C or C++
compiler?

[Nick Keighley]

Re: delay

On 7 Oct, 09:33, asit <lipu...@gmail. comwrote:

The problem is that i don't use Visual C++, I use Borland C++ 5.0.

the problem is you are on the wrong news group.
Please post your problem to a suitable Microsoft newsgroup.

[asit]

Re: delay

On Oct 7, 1:46 pm, Nick Keighley <nick_keighley_ nos...@hotmail. com>
wrote:

On 7 Oct, 09:33, asit <lipu...@gmail. comwrote:
>

The problem is that i don't use Visual C++, I use Borland C++ 5.0.

>
the problem is you are on the wrong news group.
Please post your problem to a suitable Microsoft newsgroup.

thanx friends....

finally I solved my problem.
the required function is Sleep(int milisec)
now my keylogger is not eating much resources ...

[Nate Eldredge]

Re: delay

[off-topic]

Antoninus Twink <nospam@nospam. invalidwrites:

On 7 Oct 2008 at 7:48, Ian Collins wrote:
>

>SIGALRM is a total red herring.

>
The OP asked whether delay functions can be implemented using signals.
In principle, the answer is clearly yes, as demonstrated by alarm(2).
The fact that its argument is a time in seconds doesn't change the fact
that it works by delivering a SIGALRM to the calling process.

Certainly sleep(3) can be implemented via alarm(2), and historically
has been, but isn't always. On my system it just calls nanosleep(2).

[jacob navia]

Re: delay

Antoninus Twink wrote:

On 7 Oct 2008 at 8:33, asit wrote:

>The problem is that i don't use Visual C++, I use Borland C++ 5.0.

>
Surely you can access the Windows standard library with any C or C++
compiler?
>

Sleep is a basic windows function accessible from both compilers.

--
jacob navia
jacob at jacob point remcomp point fr
logiciels/informatique
http://www.cs.virginia.edu/~lcc-win32

[Keith Thompson]

Re: delay

asit <lipun4u@gmail. comwrites:

In my multi threaded application(win dows), I have several infinite
loop(though it's not good to have...but I need them). Hence they eat
nearly 98% of CPU time(it shows in task manager).
>
I have decided to put a delay of 200 ms in the program. But
unfortunately my Compiler(Borlan d 5.5) is not providing any such
functionalities .

[...]

Questions about Windows-specific functions will generally get better
and quicker answers in comp.os.ms-windows.program mer.win32 or in one
of the microsoft.* groups.

--
Keith Thompson (The_Other_Keit h) kst-u@mib.org <http://www.ghoti.net/~kst>
Nokia
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"

[CBFalconer]

Re: delay

jacob navia wrote:

Antoninus Twink wrote:

>asit wrote:
>>

>>The problem is that i don't use Visual C++, I use Borland C++ 5.0.

>>
>Surely you can access the Windows standard library with any C or
>C++ compiler?

>
Sleep is a basic windows function accessible from both compilers.

The point is the 'sleep' is not an available function in standard
C. If you want it available, go to a newsgroup that deals with
whatever non-standard system you are using. It is off-topic on
c.l.c. You will have a hard time accessing the Windows standard
library on a Linux system, for example.

--
[mail]: Chuck F (cbfalconer at maineline dot net)
[page]: <http://cbfalconer.home .att.net>
Try the download section.