Does anyone have ideas on how to write a native D program that would sleep for X seconds / milliseconds / useconds ??  The most important feature is to not take CPU cycles while waiting.

I'm a newbie, and wondering if you have to make any OS-specific calls, or if it's architecture-specific (i386).  Basically I want to duplicate the Sleep(DWORD dwMilliseconds) call in windows.d or sleep() and usleep() in Linux to make a native D cross-platform utility for our Std. D Lib. (or whatever we call it).

Am I asking for too much trouble?  Will this always be OS-specific, and I'm better off just doing a version(Win32) {} and version(Linux) {} and calling the existing utils?

Thanks,
Brad

"Brad Anderson" <brad@sankaty.com> wrote in message news:bi1jed$1ipp$1@digitaldaemon.com...
> Does anyone have ideas on how to write a native D program that would sleep for X seconds / milliseconds / useconds ??  The most important feature is to not take CPU cycles while waiting.
>
> I'm a newbie, and wondering if you have to make any OS-specific calls,
> or if it's architecture-specific (i386).  Basically I want to duplicate
> the Sleep(DWORD dwMilliseconds) call in windows.d or sleep() and
> usleep() in Linux to make a native D cross-platform utility for our Std.
> D Lib. (or whatever we call it).
>
> Am I asking for too much trouble?  Will this always be OS-specific, and
> I'm better off just doing a version(Win32) {} and version(Linux) {} and
> calling the existing utils?
yes!

I would use the OS provided `sleep` functions, some OS's (like linux,
netbsd) run on several arch's
and the last thing you want to do is a busy wait or send a "halt" to the CPU
especially in an multi threaded or multi process env.

on windows you might want to look at the docs on `MsgWaitForMultipleObjects` which is interruptable on conditions such as new message, I would assume that there is a similar under linux may be a `select` with the msg queue filehandle.

In article <bi1jed$1ipp$1@digitaldaemon.com>, Brad Anderson says...
>
>Does anyone have ideas on how to write a native D program that would sleep for X seconds / milliseconds / useconds ??  The most important feature is to not take CPU cycles while waiting.
> ...

You know, if you import time you have (Linux):
sleep(2); // 2 seconds
msleep(???) // dosn't work for me
usleep(2_000_000); // 2 seconds

(from memory, check src/phobos/time.d)

Ant