MutexImpl(MutexImpl const&) = delete;
MutexImpl& operator=(MutexImpl const&) = delete;
void lock(actor::ActorImpl* issuer);
bool try_lock(actor::ActorImpl* issuer);
void unlock(actor::ActorImpl* issuer);
MutexImpl(MutexImpl const&) = delete;
MutexImpl& operator=(MutexImpl const&) = delete;
void lock(actor::ActorImpl* issuer);
bool try_lock(actor::ActorImpl* issuer);
void unlock(actor::ActorImpl* issuer);