44 lines
592 B
Markdown
44 lines
592 B
Markdown
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# [sync](https://golang.org/pkg/sync/)
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Use `Mutext` to prevent accessing variable from different goroutine at the same time:
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```go
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type foo struct {
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mu sync.Mutext
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bar map[string]string
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}
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func (f *foo) doSomething {
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f.mu.Lock()
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defer f.mu.Unlock()
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// do the thing
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}
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```
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Use `RWMutex` if there are many readers, and few writers:
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```go
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type foo struct {
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mu sync.RWMutext
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bar map[string]string
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}
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func (f *foo) read {
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f.mu.RLock()
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defer f.mu.RUnlock()
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// read
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}
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func (f *foo) write {
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f.mu.Lock()
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defer f.mu.Unlock()
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// write
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}
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```
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