ado_mutex_lock()

Lock a mutex

Synopsis:

#include <audio_driver.h>

#define ado_mutex_lock( mutex )

Arguments:

mutex

The mutex to lock. The mutex is of type pthread_mutex_t *.

Description:

The ado_mutex_lock() macro locks the given mutex.

This macro is defined as pthread_mutex_lock(), or ado_mutex_lock_debug() if ADO_MUTEX_DEBUG and ADO_DEBUG are defined. The debug version uses ado_debug() to display a message so as to aid in locating a mutex problem in the driver.

For more information, see “Debugging an audio driver” in the Organization of a Driver chapter.

Returns:

Same as pthread_mutex_lock():

EOK

Success.

EAGAIN

Insufficient system resources available to lock the mutex.

EDEADLK

The calling thread already owns mutex, and the mutex doesn't allow recursive behavior.

EINVAL

The given mutex is invalid.

Classification:

QNX Neutrino

See also:

ado_mutex_destroy(), ado_mutex_init(), ado_mutex_unlock()

pthread_mutex_lock() in the QNX Library Reference