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DB_ENV->mutex_lock |
#include <db.h>int DB_ENV->mutex_lock(DB_ENV *dbenv, db_mutex_t mutex);
The DB_ENV->mutex_lock method locks the mutex allocated by DB_ENV->mutex_alloc. The thread of control calling DB_ENV->mutex_lock will block until the lock is available.
The DB_ENV->mutex_lock method may not be called before the DB_ENV->open method has been called.
The DB_ENV->mutex_lock method returns a non-zero error value on failure and 0 on success.
The DB_ENV->mutex_lock method may fail and return one of the following non-zero errors:
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