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From: Rafael Rodríguez Velilla <rrv@tid.es>
To: ecos <ecos-discuss@sourceware.cygnus.com>
Subject: [ECOS] About Cyg_Scheduler::unlock_inner
Date: Tue, 22 May 2001 12:55:00 -0000	[thread overview]
Message-ID: <3B0ABE79.A4CA4B8B@tid.es> (raw)

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  I'm working with eCos 1.3.1 and I have a question about
Cyg_Scheduler::unlock_inner.

  This method is only called when  calling Cyg_Scheduler::unlock with
sched_lock=1; (so it should become 0)
  I have seen in the code that it first calls any pending DSR (if there
is any) and then it checks if there's a new thread that reclaims the
CPU.
  Why is the context of the new thread restored before decrementing
sched_lock?
  Why is not the new thread run with the scheduler unlocked?




--
Rafael Rodríguez Velilla        rrv@tid.es
Telefónica I+D          http://www.tid.es
Telf: +34 - 91 337 4270



             reply	other threads:[~2001-05-22 12:55 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-05-22 12:55 Rafael Rodríguez Velilla [this message]
2001-05-22 13:50 ` Jonathan Larmour
2001-05-23  3:41   ` Hugo Tyson
2001-05-23  3:53     ` Rafael Rodríguez Velilla
2001-05-23  4:05       ` Hugo Tyson

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