C++ (Cpp) mach_msg_send_from_kernel Examples

Example #1

File: IOAudioControlUserClient.cpp Project: alfintatorkace/osx-10.9-opensource

// OSMetaClassDefineReservedUsed(IOAudioControlUserClient, 0);
void IOAudioControlUserClient::sendChangeNotification(UInt32 notificationType)
{
    if (notificationMessage) {
        kern_return_t kr;

		notificationMessage->type = notificationType;
        kr = mach_msg_send_from_kernel(&notificationMessage->messageHeader, notificationMessage->messageHeader.msgh_size);
        if ((kr != MACH_MSG_SUCCESS) && (kr != MACH_SEND_TIMED_OUT)) {
            IOLog("IOAudioControlUserClient: sendRangeChangeNotification() failed - msg_send returned: %d\n", kr);
        }
    }
}

Example #2

File: host_notify.c Project: OpenDarwin-CVS/SEDarwin

static void
host_notify_all(
	host_flavor_t		notify_type,
	mach_msg_header_t	*msg,
	mach_msg_size_t		msg_size)
{
	queue_t		notify_queue = &host_notify_queue[notify_type];

	mutex_lock(&host_notify_lock);

	if (!queue_empty(notify_queue)) {
		queue_head_t		send_queue;
		host_notify_t		entry;

		send_queue = *notify_queue;
		queue_init(notify_queue);

		send_queue.next->prev = &send_queue;
		send_queue.prev->next = &send_queue;

		msg->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE, 0);
		msg->msgh_local_port = MACH_PORT_NULL;
		msg->msgh_id = host_notify_replyid[notify_type];
		msg->msgh_reserved = 0;

		while ((entry = (host_notify_t)dequeue(&send_queue)) != NULL) {
			ipc_port_t		port;

			port = entry->port;
			assert(port != IP_NULL);

			ip_lock(port);
			assert(ip_kotype(port) == IKOT_HOST_NOTIFY);
			assert(port->ip_kobject == (ipc_kobject_t)entry);
			ipc_kobject_set_atomically(port, IKO_NULL, IKOT_NONE);
			ip_unlock(port);

			mutex_unlock(&host_notify_lock);
			zfree(host_notify_zone, (vm_offset_t)entry);

			msg->msgh_remote_port = port;

			(void) mach_msg_send_from_kernel(msg, msg_size);

			mutex_lock(&host_notify_lock);
		}
	}

	mutex_unlock(&host_notify_lock);
}