On Sunday 15 March 2009 2:43:18 pm Barney Cordoba wrote: > > --- On Sun, 3/15/09, Julian Elischer <julian_at_elischer.org> wrote: > > > From: Julian Elischer <julian_at_elischer.org> > > Subject: Re: Is there a delay which yields? > > To: barney_cordoba_at_yahoo.com > > Cc: current_at_freebsd.org > > Date: Sunday, March 15, 2009, 1:16 PM > > Barney Cordoba wrote: > > > I'd expect DELAY to yield till timeout but a task > > with a delay loop just > > > runs to 100% usage. Is there a function which can > > yield exectution for > > > a set amount of time (without having to use a timer)? > > > > DELAY is designe for use early in the boot when thre are no > > timers. > > it is only occasionally used for cases during normal > > operation. > > > > how would a thread know how long it has been away if no > > timer is used? > > > I guess I mean a sleep. > > Also, this is a kernel driver. I have a device > which requires a toggle with a 10ms delay between pulses. I hate to > tie up the cpu for 10ms with a delay. Sort of like the following: > > write_pulse(); > delay(10000); > write_pulse(); Use pause(9). -- John BaldwinReceived on Thu Mar 19 2009 - 14:58:57 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:39:44 UTC