[ECOS] ecos state machine

[张 亮]

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
        


_________________________________________________________________
ÓëÁª»úµÄÅóÓѽøÐн»Á÷£¬ÇëʹÓà MSN Messenger: 
http://messenger.microsoft.com/cn/


-- 
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss