void unlock()
{
boost::mutex::scoped_lock lk(state_change);
state.exclusive=false;
state.exclusive_waiting_blocked=false;
release_waiters();
}
void unlock_upgrade_and_lock_shared()
{
boost::mutex::scoped_lock lk(state_change);
state.upgrade=false;
state.exclusive_waiting_blocked=false;
release_waiters();
}
void unlock()
{
typename mutex_type::scoped_lock lk(state_change);
state.exclusive = false;
state.exclusive_waiting_blocked = false;
release_waiters();
}
void unlock_and_lock_shared()
{
boost::mutex::scoped_lock lk(state_change);
state.exclusive=false;
++state.shared_count;
state.exclusive_waiting_blocked=false;
release_waiters();
}
void unlock_and_lock_upgrade()
{
typename mutex_type::scoped_lock lk(state_change);
state.exclusive = false;
state.upgrade = true;
++state.shared_count;
state.exclusive_waiting_blocked = false;
release_waiters();
}
void unlock_upgrade()
{
boost::mutex::scoped_lock lk(state_change);
state.upgrade=false;
bool const last_reader=!--state.shared_count;
if(last_reader)
{
state.exclusive_waiting_blocked=false;
release_waiters();
}
}
void unlock_shared()
{
boost::mutex::scoped_lock lk(state_change);
bool const last_reader=!--state.shared_count;
if(last_reader)
{
if(state.upgrade)
{
state.upgrade=false;
state.exclusive=true;
upgrade_cond.notify_one();
}
else
{
state.exclusive_waiting_blocked=false;
}
release_waiters();
}
}
bool timed_lock(system_time const& timeout)
{
boost::this_thread::disable_interruption do_not_disturb;
boost::mutex::scoped_lock lk(state_change);
while(state.shared_count || state.exclusive)
{
state.exclusive_waiting_blocked=true;
if(!exclusive_cond.timed_wait(lk,timeout))
{
if(state.shared_count || state.exclusive)
{
state.exclusive_waiting_blocked=false;
release_waiters();
return false;
}
break;
}
}
state.exclusive=true;
return true;
}
void unlock_shared()
{
typename mutex_type::scoped_lock lk(state_change);
bool const last_reader = !--state.shared_count;
if (last_reader)
{
if (state.upgrade)
{
state.upgrade = false;
state.exclusive = true;
upgrade_cond.signal(1);
}
else
{
state.exclusive_waiting_blocked = false;
}
release_waiters();
}
}
