#include <db_cxx.h> int DbEnv::mutex_lock(db_mutex_t mutex);
The DbEnv::mutex_lock() method locks the mutex allocated by
DbEnv::mutex_alloc(). The
thread of control calling DbEnv::mutex_lock() will block until the
lock is available.
The DbEnv::mutex_lock()
method either returns a non-zero error value or throws an
exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
The mutex parameter is a mutex previously allocated by DbEnv::mutex_alloc().
The DbEnv::mutex_lock()
method may fail and throw a DbException
exception, encapsulating one of the following non-zero errors, or return one
of the following non-zero errors: