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title A8 PATTERNS — event latch and reusable barrier
rectangle "01 ANY wait\nrelease on first selected bit" as any
rectangle "02 ALL wait\nrelease on complete mask" as all
rectangle "03 clear-on-exit\nconsume readiness epoch" as clear
rectangle "04 xEventGroupSync\nset own bit + wait ALL\nautomatic barrier clear" as barrier
any -[hidden]right- all
all --> clear
clear --> barrier
note bottom of barrier
  FC09 uses disjoint READY and SYNC masks.
  Reserved control bits are never selected.
end note
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