ado_mutex_init()

Initialize a mutex

Synopsis:

#include <audio_driver.h>

#define ado_mutex_init( mutex )

Arguments:

mutex

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

Description:

The ado_mutex_init() macro initializes the given mutex.

This macro is defined as pthread_mutex_init() (passing NULL for the attr argument), or ado_mutex_init_debug() if ADO_MUTEX_DEBUG and ADO_DEBUG are defined. The debug version uses ado_debug() to display a message to help you locate 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_init():

EOK

Success.

EAGAIN

All kernel synchronization objects are in use.

EBUSY

Previously initialized but undestroyed mutex mutex.

EFAULT

A fault occurred when the kernel tried to access mutex or attr.

EINVAL

The value specified by attr is invalid.

Classification:

QNX Neutrino

See also:

ado_mutex_destroy(), ado_mutex_lock(), ado_mutex_unlock()

pthread_mutex_init() in the QNX Library Reference