@startuml
skinparam backgroundColor transparent
skinparam shadowing false
skinparam defaultFontName Monospace
skinparam defaultFontSize 11
skinparam rectangleBorderColor #2c7794
skinparam rectangleBackgroundColor #edf6fa
title A2 STRUCTURE — equal kernel objects, different storage policy
rectangle "01 Dynamic task\nTCB + stack in ucHeap" as dt
rectangle "02 Static task\nStaticTask_t + StackType_t[]" as st
rectangle "03 Dynamic queue\nobject + item buffer in ucHeap" as dq
rectangle "04 Static queue\nStaticQueue_t + uint8_t[]" as sq
rectangle "05 Dynamic timer\ntimer object in ucHeap" as dm
rectangle "06 Static timer\nStaticTimer_t" as sm
rectangle "07 Static kernel services\nIdle TCB/stack\nTimer daemon TCB/stack" as svc
dt -[hidden]right- st
dq -[hidden]right- sq
dm -[hidden]right- sm
dt -down-> dq : same message 0xCAFE
st -down-> sq : same message 0xCAFE
dq -down-> dm : one-shot callback
sq -down-> sm : one-shot callback
svc ..> dm
svc ..> sm
@enduml