event doing embedded code

i wish know events used embedded component code.

main idea know accurately eventuality flags set/reset code. brand assign controlling eventuality fall pieces fall removing set/reset any task.

please put your idea comments it.

thanks advance.

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(edit 1: copied construction answer below)

sorry naming sum required. indeed i am prying research any concentration combined c libel controlling vxworks/itron/osek os. instance there eventlib library vxworks support eventuality handling. i wish know such component routines hoop events task. eventuality flag(is global/local...or ?), set pieces any eventuality fall illusory charge between assign eventuality flags ??

how assign wait churned events and mode ??
i came opposing instance unfolding given next looks dangerous, nonetheless since ??

            scenarios ==> *[task1 : set(e1), task2 : wait(e1) set(e2), task3 : wait(e2) ]*                                             

i know churned eventuality flags waited assign spin dependency between churned tasks(deadlock) dangerous cases task-event relationship, nonetheless above unfolding dangerous, i am removing it....kindly explain.

                (are there any some-more such scenarios illusory task-event doing should reviewed formula ?? ) 

i wish above information sufficient ....