user
30 lines
1.0 KiB
Plaintext
30 lines
1.0 KiB
Plaintext
@startuml
|
|
scale 820 width
|
|
top to bottom direction
|
|
skinparam backgroundColor transparent
|
|
skinparam shadowing false
|
|
skinparam defaultFontName Monospace
|
|
skinparam defaultFontSize 9
|
|
skinparam rectangleBorderColor #2c7794
|
|
skinparam rectangleBackgroundColor #edf6fa
|
|
skinparam ArrowColor #8095a1
|
|
title A5 FLOW — allocate, fragment, coalesce, verify
|
|
|
|
rectangle "01 RESET\ninitial free = 4080" as S1
|
|
rectangle "02 ALLOC A\n24 byte payload\nfirst-fit + split" as S2
|
|
rectangle "03 ALLOC B / C\n40 + 16 byte payload\nafter = 3952" as S3
|
|
rectangle "04 FREE A / C\nB remains allocated" as S4
|
|
rectangle "05 E01 FRAGMENTED\n2 free blocks\ncurrent > largest" as S5
|
|
rectangle "06 FREE B\ninsert by address\njoin right + left" as S6
|
|
rectangle "07 E02 COALESCED\n1 free block\nfinal = initial" as S7
|
|
rectangle "08 OOM CHECK\nNULL · hook=1\nasserts=0 · PASS=1" as S8
|
|
|
|
S1 -right-> S2 : pvPortMalloc
|
|
S2 -right-> S3 : split remainder
|
|
S3 -right-> S4 : vPortFree
|
|
S4 -down-> S5 : heap stats
|
|
S5 -left-> S6 : continue
|
|
S6 -left-> S7 : coalesce
|
|
S7 -left-> S8 : oversized request
|
|
@enduml
|