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ecos state machine
- From: =?gb2312?B?1cUgwcE=?= <johnsonest at hotmail dot com>
- To: nickg at calivar dot demon dot co dot uk
- Cc: ecos-discuss at sources dot redhat dot com
- Date: Sat, 03 Aug 2002 11:13:11 +0800
- Subject: [ECOS] ecos state machine
- Bcc:
Dear nickg,
I have accepted your delete-safety policy.
about ecos state machine:
RUNNING = 0, // Thread is runnable or running
SLEEPING = 1, // Thread is waiting for something to
happen
COUNTSLEEP = 2, // Sleep in counted manner
SUSPENDED = 4, // Suspend count is non-zero
CREATING = 8, // Thread is being created
EXITED =16,
SLEEPSET = (SLEEPING | COUNTSLEEP)
i am confused that why so many states needed?
specially:
COUNTSLEEP(if it is not needed, neither SLEEPSET.if it is
needed,why COUNTSUSPENDED not needed? )
CREATING?? never used!
SLEEPSET??
in same time, OS can exist on only one state!
if let you draw a state machine,it will be
miscellaneous ,right?
i feel that READY,RUNNING,SUSPENDED,SLEEP(delay or wait source),EXITED are
enough.no matter thread (self,other).right?
zhlg
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