OpenEuphoria

2. Re: What if I only want to sleep for milliseconds?

• Posted by ryanj Jun 24, 2009
• 1330 views

In version 4, sleep() will allow milliseconds. If you are using 3.1, you can use the nanosleep() function in the idle.e library, which you can download here:

http://www.rapideuphoria.com/idlelib.zip

global procedure nanosleep(atom s) 
--Sleeps for s seconds. 0.000000001 s = 1 nanosecond. 
--This is compatible with the sleep() function. However, you can use non-integers as well. 
--For example: 
--  nanosleep(0.001) --sleeps for 1 millisecond 
--  nanosleep(0.000000001) --this is the smallest amount of time possible (linux) 
--  nanosleep(0) --sleeps for the smallest amount of time possible 
--  nanosleep(1.5) 
--  nanosleep(17.0003)  
--  nanosleep(0.5) 
... 

Hope that helps. Let me know if there are any problems.

~ryanj

4. Re: What if I only want to sleep for milliseconds?

• Posted by LarryMiller Jun 24, 2009
• 1351 views

Very true. If this is a GUI app you really don't want to be using sleep(), except possibly for very short delays. During the sleep() perioed your app will be unable to respond to messages and will appear to have hung. In a GUI app not responding to messages is a very bad thing. In some cases this can even cause other aplications to hang. In almost every case using a timer is the better solution.

Larry Miller

6. Re: What if I only want to sleep for milliseconds?

• Posted by tiger05 Jun 24, 2009
• 1286 views
• Last edited Jun 25, 2009

Sleep can accept milliseconds in version 4? I have the third alpha of version 4 and if I have something like sleep(0.1) I get a type check error.

8. Re: What if I only want to sleep for milliseconds?

• Posted by DerekParnell (admin) Jun 25, 2009
• 1288 views

It works fine for me. I'm using revision #2176 but I'm not sure what the latest alpha was using.

Have a look at include/std/os.e file for the sleep() function. It should look like this ...

public procedure sleep(atom t) 
-- go to sleep for t seconds 
-- allowing (on WIN32 and Linux) other processes to run 
	if t >= 0 then 
		machine_proc(M_SLEEP, t) 
	end if 
end procedure 

10. Re: What if I only want to sleep for milliseconds?

• Posted by tiger05 Jun 25, 2009
• 1287 views

Thanks. I changed my include line to std/os.e instead of misc.e.

12. Re: What if I only want to sleep for milliseconds?

• Posted by ryanj Jun 25, 2009
• 1264 views
• Last edited Jun 26, 2009

global constant 
 cSleep = define_c_proc( 
  kernel32, "Sleep", -- msdn2.microsoft.com/en-us/library/ms686298.aspx 
  {DWORD}), -- milliseconds to sleep. 
   -- A value of zero causes the thread to relinquish the remainder of its time slice 
   --  to any other thread of equal priority that is ready to run. 
   --  If there are no other threads of equal priority ready to run, 
   --  the function returns immediately, and the thread continues execution. 

Yes, that is the exact routine that is called by eu4's sleep(). In linux, there is an equivalent function that is called. Also, by the way, multitasking now uses that when there is idle time between scheduled tasks. (Previously, less than 1 second of time between tasks would cause 100% CPU usage because the task scheduler used active waiting.) There is also a new multi-tasking funtion called task_delay().

One more thing: I noticed that the documentation for sleep() doesn't really put an emphasis on the fact that it now accepts non-integers. Don't you think it should tell exactly how precise it is now? I believe it is milliseconds in Windows, and nanoseconds in linux. I don't know what it is in DOS. Could someone add that to the docs, please?