Lock locks one or more mutexes for writing and calls the given function.

LockRet locks one or more mutexes for writing and calls the given function, returning a value.

LockRetErr locks one or more mutexes for writing and calls the given function, returning a value and an error.

NewMutex returns a new mutex.

NewRWMutex returns a new read-write mutex.

RLock locks one or more mutexes for reading and calls the given function.

RLockRet locks one or more mutexes for reading and calls the given function, returning a value.

RLockRetErr locks one or more mutexes for reading and calls the given function, returning a value and an error.

Mutex is a mutex that can be locked and unlocked.

RWMutex is a mutex that can be locked and unlocked for reading and writing.