从面向对象的视角分析Redis 事件循环

aeApiState #select

aeApiState #evpoll

+ portfd: int+ npending: int + pending_fds: int[MAX_EVENT_BATCHSZ] +pending_masks: int[MAX_EVENT_BATCHSZ]

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<<interface>>aeApiState #apidata

类图不是c++、Java、Python等语言的专利。类图显示了模型的静态结构，特别是模型中存在的架构元素、元素的内部结构以及它们与其他元素的关系。类图是面向对象建模的方法。面向对象是一种思想，故此类图可以用于，并且应当用于一般概念建模。

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aeFileEvent

+ mask: int+ rfileProc: aeFileProc *+ wfileProc: aeFileProc *+ clientData: void *

aeTimeEvent

+ id: long long+ when_sec: long+ timeProc: aeTimeProc *+ finalizerProc: aeEventFinalizerProc *+ clientData: void *+ prev: struct aeTimeEvent *+ next: struct aeTimeEvent *

aeApiState #epoll

+ epfd: int+ events: struct epoll_event *

aeFiredEvent

+ fd: int+ mask: int

aeApiState #kuqeue

+ kqfd: int+ events: struct kevent *

aeEventLoop

+ maxfd: int+ setsize: int+ timeEventNextId: long long+ events: aeFileEvent*+ fired: aeFiredEvent *+ timeEventHead: aeTimeEvent *+ stop: int+ apidata : void *+ beforesleep: aeBeforeSleepProc *+ aftersleep: aeBeforeSleepProc *