coroutines
协程
协同程序
A thread can be in one of four states…. Its not necessary for the second version to actually use a Go routine ; A process can be in one of four possible states.Swoft is a PHP high performance microservice coroutine framework. Tasks can exist in one of the four following states.
Its not necessary for the second version to actually use a Go routine ; Eventually the Go routine is done and the work pool keeps on doing its job. 生成器和协程 是设置数据流类型应用程序的一种很酷的方法。 Generators and coroutines are a cool way to set up data-flow type applications. 协程 的状态有:running,suspended,normal,dead。Returns one of the values from running, normal, suspended or dead.So the async method does not block the task execution on the current queue. 光纤、绿色线程和协程 在许多方面是相似的,这会导致很多混淆。 Fibers, green threads and coroutines are in many ways similar, which leads to much confusion. 它还支持多个同时进行的搜索,无论是通过多线程的方式还是借助协程 。 It also supports multiple simultaneous searches, whether multithreaded or with coroutines . 其中一种是另一个本地协程 ,不过这个对我们了解底层细节没有啥帮助。 One of them is another native co-routine , but that doesn't help get to the bottom of things. 在3.5和3.6有很多改变,因为现在除了生成器我们还有协程 对象。 With 3.5 and 3.6 a lot changed because now in addition to generators we have coroutine objects. 当使用光纤、绿色线程或协程 时,每个函数通常有一个单独的堆栈。 When using fibers, green threads or coroutines , you usually have a separate stack per function. 原因是它提供了两种强大机制的简单语法:协程 和通道. The reason for this is that it provides a simple syntax over two powerful mechanisms: goroutines and channels. 为了克服这个问题,Tornado协程 提出了一种特殊的异常,称为Return。 To overcome this, Tornado coroutines raise a special kind of exception called a Return. 它的工作方式和future类似,但它也有一些额外的方法来提取所包含的协程 的当前堆栈。 It works like a future but it also has some extra methods to extract the current stack of the contained coroutine . 它包括反常处理机制、协程 和宏,但并不包括goto句子。 It includes exception handling mechanisms, coroutines and macros while it excludes the goto statement. 关键之处是协程 确实是与Python的生成器非常相似,也都有一个send方法。 The trick to realise is that co-routines are actually pretty similar to Python generators, and have the same send method. 它包括异常处理机制、协程 和宏,但并不包括goto语句。 It includes exception handling mechanisms, coroutines and macros while it excludes the goto statement. 这通常也称为M:N线程模型,因为我们有M个应用线程(协程 )运行在N个操作系统线程上。 This is often called an M: N threading model because we have M application threads(goroutines ) running on N OS threads. 叫做goroutine是因为已有的短语--线程、协程 、进程等等--传递了不准确的含义。 They're called goroutines because the existing terms- threads, coroutines , processes, and so on- convey inaccurate connotations. 尽管不太成功,它们还使用库程序指定其他有趣的控制结构,如协程 和过程关闭。 With less success, they also use library procedures to specify interesting control constructs such as coroutines and procedure closures. 啥?因为我们可能有多个(这个情况下两个)协程 同时写入一个相同变量counter。 Because we potentially have multiple(two in this case) goroutines writing to the same variable, counter, at the same time. 其返回结果是asyncio协程,而不是像run_coroutine_threadsafe这样的并发协程 。 The result is then returned as an asyncio coroutine instead of a concurrent coroutine like run_coroutine _threadsafe would do. 协程 函数可以用asyncdef语句定义,并且可以包含await,asyncfor和asyncwith关键字。A coroutine function may be defined with the async def statement, and may contain await, async for, and async with keywords. 这是因为主进程在退出前协程 才会有机会去执行(主进程在退出前不会等待全部协程执行完毕)。 That's because the main process exits before the goroutine gets a chance to execute(the process doesn't wait until all goroutines are finished before exiting). 该提案目的是使协程 成为Python语言的原生特性,并“建立一种普遍、易用的异步编程思维模型。 The proposal aims at making coroutines a native Python language feature and to"establish a common, easily approachable, mental model of asynchronous programming.".
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