并发访问映射 [英] Map with concurrent access

问题描述

在并发访问的程序中使用映射时，是否需要在函数中使用互斥锁来读取值?

When you use a map in a program with concurrent access, is there any need to use a mutex in functions to read values?

推荐答案

多个读者，没有作者也可以:

Multiple readers, no writers is okay:

https://groups.google.com/d/msg/golang-nuts/HpLWnGTp-n8/hyUYmnWJqiQJ

一个作家，没有读者是可以的.(否则地图就不太好用了.)

One writer, no readers is okay. (Maps wouldn't be much good otherwise.)

否则，如果至少有一个写入者和至少一个写入者或读取者，则所有读取者和写入者必须使用同步来访问地图.互斥锁适用于此.

Otherwise, if there is at least one writer and at least one more either writer or reader, then all readers and writers must use synchronization to access the map. A mutex works fine for this.

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