关于c++:Folly库代码赏析7Executor

Folly 的余下内容分为

• • [] synchronization
• • [] memory
• • [] logging
• • [] io
• • [] gen
• • [] fibers
• • [] executors
• • [] concurrency

classDiagram
    Executor
    Executor <|-- IOExecutor
    Executor <|-- ThreadPoolExecutor
    IOExecutor <|-- IOThreadPoolExecutor
    ThreadPoolExecutor <|--    IOThreadPoolExecutor
    ThreadPoolExecutor <|-- CPUThreadPoolExecutor
    Executor <|-- DrivableExecutor
    Executor <|-- ManualExecutor

Executor

KeepAlive是对 Executor 的平安援用，Executor析构时会 join 所有 KeepAlive 对象。

ThreadExecutor

对于每个 task 启动一个线程执行，通过 channel 告诉工作增加、删除、完结。golang中的select channel 用法。

ThreadPoolExecutor

IO/CPUThreadPoolExecutor的基类，提供了统计性能等通用信息。

IOThreadPoolExecutor

提供多个 ioThread，每个ioThread 容许event_base loop。