40             typename mutex_type::scoped_lock lock(mutex);  in flog_once()
42             lock.release();  in flog_once()
45             typename mutex_type::scoped_lock lock;  in flog_once()  local
46             lock.acquire(mutex);  in flog_once()
94             typename mutex_type::scoped_lock lock(mutex, write);  in flog_once()
99                     lock_kept = lock.downgrade_to_reader();  in flog_once()
109                     lock_kept = lock.upgrade_to_writer();  in flog_once()
117             lock.release();  in flog_once()
120             typename mutex_type::scoped_lock lock;  in flog_once()  local
121             lock.acquire(mutex, write);  in flog_once()
126                     lock_kept = lock.downgrade_to_reader();  in flog_once()
136                     lock_kept = lock.upgrade_to_writer();  in flog_once()
216         scoped_lock lock(rw_mutex, /*writer = */false);  in TestIsWriter()
217         CHECK_MESSAGE(!lock.is_writer(), error_message_writer);  in TestIsWriter()
220         scoped_lock lock(rw_mutex, /*writer = */true);  in TestIsWriter()
221         CHECK_MESSAGE(lock.is_writer(), error_message_not_writer);  in TestIsWriter()
225         scoped_lock lock;  in TestIsWriter()  local
226         lock.acquire(rw_mutex, /*writer = */false);  in TestIsWriter()
227         CHECK_MESSAGE(!lock.is_writer(), error_message_writer);  in TestIsWriter()
230         scoped_lock lock;  in TestIsWriter()  local
231         lock.acquire(rw_mutex, /*writer = */true);  in TestIsWriter()
232         CHECK_MESSAGE(lock.is_writer(), error_message_not_writer);  in TestIsWriter()
236         scoped_lock lock(rw_mutex, /*writer = */false);  in TestIsWriter()
237         lock.upgrade_to_writer();  in TestIsWriter()
238         CHECK_MESSAGE(lock.is_writer(), error_message_not_writer);  in TestIsWriter()
239         lock.downgrade_to_reader();  in TestIsWriter()
240         CHECK_MESSAGE(!lock.is_writer(), error_message_writer);  in TestIsWriter()