go - goroutine调用中 channel 接收运算符的阻塞行为

Question

go DelegateWork(mr, <-mr.impl.readyWorkers, jobArgs)    

在上面的示例中， channel 接收运算符会导致调用方或被调用的goroutine阻塞吗？

Answer 1

Spec: Go statements:

The function value and parameters are evaluated as usual in the calling goroutine, but unlike with a regular call, program execution does not wait for the invoked function to complete. Instead, the function begins executing independently in a new goroutine.

因此，如果 <-mr.impl.readyWorkers阻止，它将在启动新的goroutine之前阻止调用方goroutine。