golang mutex

sync  패키지

type Mutex func (m *Mutex) Lock() func (m *Mutex) TryLock() bool func (m *Mutex) Unlock() type Once func (o *Once) Do(f func()) type Pool func (p *Pool) Get() any func (p *Pool) Put(x any) type RWMutex func (rw *RWMutex) Lock() func (rw *RWMutex) RLock() func (rw *RWMutex) RLocker() Locker func (rw *RWMutex) RUnlock() func (rw *RWMutex) TryLock() bool func (rw *RWMutex) TryRLock() bool func (rw *RWMutex) Unlock()

[링크 : https://pkg.go.dev/sync]

 

Mutex.Lock() 은 Mutex.Unlock()으로 풀수 있다.

[링크 : https://pkg.go.dev/sync#Mutex.Lock]

[링크 : https://pkg.go.dev/sync#Mutex]

 

RWMutex.RLock() / RWMutex.Lock() - RWMutex.RUnlock() / RWMutex.Unlock()

abc 순으로 정렬되어있다보니 보기가 어렵네

아무튼 Lock - Unlock / RLock - RUnlock 으로 pair가 된다.

func (rw *RWMutex) Lock() Lock locks rw for writing. If the lock is already locked for reading or writing, Lock blocks until the lock is available. func (*RWMutex) Unlock ¶ func (rw *RWMutex) Unlock() Unlock unlocks rw for writing. It is a run-time error if rw is not locked for writing on entry to Unlock. As with Mutexes, a locked RWMutex is not associated with a particular goroutine. One goroutine may RWMutex.RLock (RWMutex.Lock) a RWMutex and then arrange for another goroutine to RWMutex.RUnlock (RWMutex.Unlock) it. func (*RWMutex) RLock ¶ func (rw *RWMutex) RLock() RLock locks rw for reading. It should not be used for recursive read locking; a blocked Lock call excludes new readers from acquiring the lock. See the documentation on the RWMutex type. func (*RWMutex) RUnlock ¶ func (rw *RWMutex) RUnlock() RUnlock undoes a single RWMutex.RLock call; it does not affect other simultaneous readers. It is a run-time error if rw is not locked for reading on entry to RUnlock.

[링크 : https://pkg.go.dev/sync#RWMutex.Lock]

[링크 : https://pkg.go.dev/sync#RWMutex]

 

[링크 : https://www.jaenung.net/tree/28536]

[링크 : https://rainbow96bear.tistory.com/entry/Go-고루틴-이해하기-뮤텍스-데드락]

 

+

2026.08.26

Usage¶ To help diagnose such bugs, Go includes a built-in data race detector. To use it, add the -race flag to the go command: $ go test -race mypkg    // to test the package $ go run -race mysrc.go  // to run the source file $ go build -race mycmd   // to build the command $ go install -race mypkg // to install the package

[링크 : https://go.dev/doc/articles/race_detector]