Library Version 18.1.40

DB_ENV->mutex_lock()
Prev | Chapter 9. Mutex Methods | Next

## 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 returns a non-zero error value on failure and 0 on success.

### Parameters

#### mutex

The mutex parameter is a mutex previously allocated by DB_ENV->mutex_alloc() .

### Errors

The `DB_ENV->mutex_lock()` method may fail and return one of the following non-zero errors:

#### EINVAL

An invalid flag value or parameter was specified.

### Class

DB_ENV

### See Also

Mutex Methods

Prev | Up | Next
DB_ENV->mutex_get_tas_spins() | Home | DB_ENV->mutex_set_align()