A Tour of GO (5) -- Concurrent
作者:
陈胖子胖胖胖 | 来源:发表于
2016-01-13 12:06 被阅读0次
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Goroutine:
- A lightweight thread managed by the GO runtime.
go f(x, y, z)
starts a new goroutine ruing f(x,y,z).
- The evaluation of
x, y,z happens in the current goroutine and f happens in a new goroutine.
- The share the same memory space. Be aware of the synchronization.
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Channel
- A typed conduit through which you can send and receive values with the channel operator `
ch <- v // send v to channel ch.
v: = <- ch //receive from ch, and assign to v.
- Channels must be make before use
ch: = make(chan int).
- Sends and receives block until the other side is ready. This allow goroutines to synchronize.
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Buffered Channels:
ch:= make (chan int, 100)
- Buffered channel block only when the buffer is full (for sending) and empty(for reading).
- Range and Close: A sender can close a channel to indicate no more to send.
- Receiver can test whether a channel has been closed by assigning a second parameter.
v, ok :=<- ch
ok is false if the channel is closed.
- The loop
for i:= range
receives values from the channel repeatedly until it is closed.
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Close
- The select lets a goroutine wait on multiple communication operations.
- The select block until one of its case can run
- It choose one at random if more than one is ready.
- Default: The default case in a select is run if no other case is ready.
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sync.Mutex
mux sync.Mutex
mux.Lock()
mux.Unlock()
本文标题：A Tour of GO (5) -- Concurrent
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