Web Worker postMessage（{}）何时返回调用者
[英]When does Web Worker postMessage({}) return to caller
问题描述
I have a recollection of reading that a postMessage request will not return until the onmessage event has been delivered to the recipient. 
我有种回忆，那就是在onmessage事件传递给接收者之前，postMessage请求将不会返回。
Having said that, I can't seem to find any reference on the web at the mo and docs such as: - https://html.spec.whatwg.org/multipage/workers.html talk of message "queues" which make me think that messages can be stacked/queued up for processing. 话虽如此，我似乎在网上找不到其他参考资料，例如：-https: //html.spec.whatwg.org/multipage/workers.html关于消息“队列”的讨论我认为可以将消息堆叠/排队进行处理。
Does someone here have a reference pointer for the prescribed behaviour? 这里有人为规定的行为提供参考指针吗？
Can a web-page and worker get into a deadlock by simply trying to send messages to each other at the same time? 网页和工作人员是否可以通过尝试同时相互发送消息而陷入僵局？
1 个解决方案
解决方案1
1 2015-09-07 09:10:07
It returns pretty much immediately. 它立即返回。 Messages are queued by postMessage() and then copied/transferred "behind the scenes" and delivered to workers asynchronously. 消息由postMessage()排队，然后“在幕后”复制/传输，并异步传递给工作人员。 Same for the other way around. 反之亦然。 Deadlock should not be possible, unless you halt all processing until you've seen a certain message, of course. 死锁应该是不可能的，除非您停止所有处理，直到看到特定消息为止。
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