From: Arnaud Mouiche <arnaud.mouiche@inventel.fr>
To: ecos-discuss@sourceware.cygnus.com
Subject: [ECOS] scheduler and clock question
Date: Fri, 20 Jul 2001 05:30:00 -0000 [thread overview]
Message-ID: <5.0.2.1.0.20010720141217.00aa29a0@193.54.84.101> (raw)
first, tell me if I'm right :
- the object 'Cyg_RealTimeClock' defined in the 'clock.cxx' files has an
ISR. this ISR is called regulary (10 ms corresponding to the
CYGNUM_KERNEL_COUNTERS_RTC_PERIOD value, generally equal to
CYGNUM_HAL_RTC_PERIOD.)
- to create this periodicaly call, it use 'hal_clock_initialize' and
'hal_clock_reset' specifics functions.
- the ISR attachement is performed by the 'Cyg_RealTimeClock' constructor
- every CYGNUM_KERNEL_SCHED_TIMESLICE_TICKS times an ISR rise for the timer
(generally equal to 5), a call is made to the choosen scheduler object.
this scheduler performs context switch and so..
Here my question :
There is no header defined for 'Cyg_RealTimeClock' object. And there is
no link with this object in any other files. In that case, who initializes
this object (and so, who calls the contructor) ?
If you have the answer, ... you are welcome !!!
arnaud
next reply other threads:[~2001-07-20 5:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-20 5:30 Arnaud Mouiche [this message]
2001-07-20 5:56 ` Jonathan Larmour
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