• Brad Anderson <brad sankaty.com> Aug 20 2003
• "Mike Wynn" <mike.wynn l8night.co.uk> Aug 20 2003
• Ant <Ant_member pathlink.com> Aug 26 2003

Brad Anderson <brad sankaty.com> writes:

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

"Mike Wynn" <mike.wynn l8night.co.uk> writes:

"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?



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.

Ant <Ant_member pathlink.com> writes:

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