int pthread_mutex_init()

in FreeRTOS-Plus-POSIX/source/FreeRTOS_POSIX_pthread_mutex.c [112:166]

• 40 lines of code
• 6 McCabe index (conditional complexity)

int pthread_mutex_init( pthread_mutex_t * mutex,
                        const pthread_mutexattr_t * attr )
{
    int iStatus = 0;
    pthread_mutex_internal_t * pxMutex = ( pthread_mutex_internal_t * ) mutex;

    if( pxMutex == NULL )
    {
        /* No memory. */
        iStatus = ENOMEM;
    }

    if( iStatus == 0 )
    {
        *pxMutex = FREERTOS_POSIX_MUTEX_INITIALIZER;

        /* No attributes given, use default attributes. */
        if( attr == NULL )
        {
            pxMutex->xAttr = xDefaultMutexAttributes;
        }
        /* Otherwise, use provided attributes. */
        else
        {
            pxMutex->xAttr = *( ( pthread_mutexattr_internal_t * ) ( attr ) );
        }

        /* Call the correct FreeRTOS mutex creation function based on mutex type. */
        if( pxMutex->xAttr.iType == PTHREAD_MUTEX_RECURSIVE )
        {
            /* Recursive mutex. */
            ( void ) xSemaphoreCreateRecursiveMutexStatic( &pxMutex->xMutex );
        }
        else
        {
            /* All other mutex types. */
            ( void ) xSemaphoreCreateMutexStatic( &pxMutex->xMutex );
        }

        /* Ensure that the FreeRTOS mutex was successfully created. */
        if( ( SemaphoreHandle_t ) &pxMutex->xMutex == NULL )
        {
            /* Failed to create mutex. Set error EAGAIN and free mutex object. */
            iStatus = EAGAIN;
            vPortFree( pxMutex );
        }
        else
        {
            /* Mutex successfully created. */
            pxMutex->xIsInitialized = pdTRUE;
        }
    }

    return iStatus;
}