From: Serkan Coban (scobanx@yahoo.com)
Date: Wed 17 Aug 2005 - 09:57:32 EEST
time_nanosleep
(PHP 5)
time_nanosleep -- Delay for a number of seconds and
nanoseconds
Description
mixed time_nanosleep ( int seconds, int nanoseconds )
Delays program execution for the given number of
seconds and nanoseconds.
seconds must be a positive integer, and nanoseconds
must be a positive integer less than 1 billion.
Return Values
Returns TRUE on success or FALSE on failure.
If the delay was interrupted by a signal, an
associative array will be returned with the
components:
*
seconds - number of seconds remaining in the
delay
*
nanoseconds - number of nanoseconds remaining in
the delay
--- Serkan YARAMAZ <serkan@cozum.com> wrote:
> Peki PHP de var mý boyle bir komut yada buna eþdeðer
> bir komut
>
> -----Original Message-----
> From: linux-programlama-bounces@liste.linux.org.tr
>
[mailto:linux-programlama-bounces@liste.linux.org.tr]
> On Behalf Of Serkan
> Coban
> Sent: Wednesday, August 17, 2005 9:46 AM
> To: linux-programlama@liste.linux.org.tr
> Subject: Re: [Linux-programlama] NanoSaniye
> hızlarda bekleme yaptırmak
>
> man nanosleep ciktisi umarim isinizi gorur.
>
>
>
> NANOSLEEP(2) Linux Programmer's Manual NANOSLEEP(2)
>
> NAME
> nanosleep - pause execution for a specified time
>
> SYNOPSIS
> #include <time.h>
>
> int nanosleep(const struct timespec *req, struct
> timespec
> *rem);
>
> DESCRIPTION
> nanosleep delays the execution of the program for at
> least
> the time specified in *req. The function can return
> ear-
> lier if a signal has been delivered to the process.
> In
> this case, it returns -1, sets errno to EINTR, and
> writes
> the remaining time into the structure pointed to by
> rem
> unless rem is NULL. The value of *rem can then be
> used
> to
> call nanosleep again and complete the specified
> pause.
>
> The structure timespec is used to specify intervals
> of
> time with nanosecond precision. It is specified in
> <time.h> and has the form
>
> struct timespec
> {
> time_t tv_sec; /* seconds */
> long tv_nsec; /* nanoseconds */
> };
>
> The value of the nanoseconds field must be in the
> range 0
> to 999 999 999.
>
> Compared to sleep(3) and usleep(3), nanosleep has
> the
> advantage of not affecting any signals, it is
> standardized
> by POSIX, it provides higher timing resolution, and
> it
> allows to continue a sleep that has been interrupted
> by a
> signal more easily.
>
> ERRORS
> In case of an error or exception, the nanosleep
> system
> call returns -1 instead of 0 and sets errno to one
> of
> the
> following values:
>
> EINTR The pause has been interrupted by a
> non-blocked
> signal that was delivered to the process. The
> remaining sleep time has been written into *rem so
> that the process can easily call nanosleep again
> and continue with the pause.
>
> EINVAL The value in the tv_nsec field was not in the
> range 0 to 999 999 999 or tv_sec was negative.
>
> BUGS
> The current implementation of nanosleep is based on
> the
> normal kernel timer mechanism, which has a
> resolution
> of
> 1/HZ s (i.e, 10 ms on Linux/i386 and 1 ms on
> Linux/Alpha).
> Therefore, nanosleep pauses always for at least the
> speci-
> fied time, however it can take up to 10 ms longer
> than
> specified until the process becomes runnable again.
> For
> the same reason, the value returned in case of a
> delivered
> signal in *rem is usually rounded to the next larger
> mul-
> tiple of 1/HZ s.
>
> As some applications require much more precise
> pauses
> (e.g., in order to control some time-critical
> hardware),
> nanosleep is also capable of short high-precision
> pauses.
> If the process is scheduled under a real-time policy
> like
> SCHED_FIFO or SCHED_RR, then pauses of up to 2 ms
> will
> be
> performed as busy waits with microsecond precision.
>
> CONFORMING TO
> POSIX.1b (formerly POSIX.4).
>
> SEE ALSO
> sleep(3), usleep(3), sched_setscheduler(2), and
> timer_cre-
> ate(2).
> --- "Omer F. USTA" <usta@bilisimlab.com> wrote:
>
> > Merhabalar
> >
> > izledi�im yöntem �u
> �ekilde
> > while(1)
> > {
> >
> > outb(1,base);
> > for(i=0;i<=1;i++)
> > {
> > }
> > outb(0,base);
> > for(i=0;i<=1;i++)
> > {
> > }
> > }
> >
> > ve bu kod ile 4 mikro saniye aralıklı pulse
> > olu�turuyorum.
> > benim ihtiyacım ise bunu 500~900 nanosaniye
> > civarına çekmek.
> >
> > Hocalarım ilgilenirse sevinirim
> >
> > �mer F. USTA
> >
> >
> > > _______________________________________________
> > Linux-programlama mailing list
> > Linux-programlama@liste.linux.org.tr
> >
>
http://liste.linux.org.tr/mailman/listinfo/linux-programlama
> >
>
>
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