/** Write from local copy into BlackBoard memory.
* @exception InterfaceInvalidException thrown if the interface has
* been marked invalid
*/
void
Interface::write()
{
if ( ! __write_access ) {
throw InterfaceWriteDeniedException(__type, __id, "Cannot write.");
}
__rwlock->lock_for_write();
__data_mutex->lock();
if ( __valid ) {
if (data_changed) {
if (__auto_timestamping) __timestamp->stamp();
long sec = 0, usec = 0;
__timestamp->get_timestamp(sec, usec);
data_ts->timestamp_sec = sec;
data_ts->timestamp_usec = usec;
data_changed = false;
}
memcpy(__mem_data_ptr, data_ptr, data_size);
} else {
__data_mutex->unlock();
__rwlock->unlock();
throw InterfaceInvalidException(this, "write()");
}
__data_mutex->unlock();
__rwlock->unlock();
__interface_mediator->notify_of_data_change(this);
}
/** Get the first message from the message queue.
*
* This can only be called on a writing interface instance.
*
* @return first message in queue or NULL if there is none
*/
Message *
Interface::msgq_first()
{
if ( ! __write_access ) {
throw InterfaceWriteDeniedException(__type, __id, "Cannot work on message queue on "
"reading instance of an interface (first).");
}
return __message_queue->first();
}
/** Remove message from queue.
* Removes the given message from the queue. Note that if you
* unref()ed the message after insertion this will most likely delete
* the object. It is not safe to use the message after removing it
* from the queue in general.
*
* This can only be called on a writing interface instance.
*
* @param message Message to remove.
*/
void
Interface::msgq_remove(Message *message)
{
if ( ! __write_access ) {
throw InterfaceWriteDeniedException(__type, __id, "Cannot work on message queue on "
"reading instance of an interface (remove msg).");
}
return __message_queue->remove(message);
}
/** Erase first message from queue.
* This can only be called on a writing interface instance.
*/
void
Interface::msgq_pop()
{
if ( ! __write_access ) {
throw InterfaceWriteDeniedException(__type, __id, "Cannot work on message queue on "
"reading instance of an interface (pop).");
}
__message_queue->pop();
}
/** Get start iterator for message queue.
* Not that you must have locked the queue before this operation!
*
* This can only be called on a writing interface instance.
*
* @return iterator to begin of message queue.
* @exception NotLockedException thrown if message queue is not locked
* during this operation.
*/
MessageQueue::MessageIterator
Interface::msgq_begin()
{
if ( ! __write_access ) {
throw InterfaceWriteDeniedException(__type, __id, "Cannot work on message queue on "
"reading instance of an interface (begin).");
}
return __message_queue->begin();
}
/** Get size of message queue.
* This can only be called on a writing interface instance.
* @return number of messages in queue.
*/
unsigned int
Interface::msgq_size()
{
if ( ! __write_access ) {
throw InterfaceWriteDeniedException(__type, __id, "Cannot work on message queue on "
"reading instance of an interface (size).");
}
return __message_queue->size();
}
/** Enqueue message.
* This will enqueue the message without transmitting it via the
* message mediator. It can be useful, for example, to enqueue the
* message from an event callback.
*
* This can only be called on a writing interface instance.
*
* @param message message to enqueue, reference count will be incremented.
*/
void
Interface::msgq_append(Message *message)
{
if ( ! __write_access ) {
throw InterfaceWriteDeniedException(__type, __id, "Cannot work on message queue on "
"reading instance of an interface (append).");
}
message->ref();
__message_queue->append(message);
}
/** Try to lock message queue.
* Try to lock the message queue. Returns immediately and does not
* wait for lock.
*
* This can only be called on a writing interface instance.
* @return true, if the lock has been aquired, false otherwise.
* @see lock()
*/
bool
Interface::msgq_try_lock()
{
if ( ! __write_access ) {
throw InterfaceWriteDeniedException(__type, __id,
"Cannot work on message queue on "
"reading instance of an interface "
"(msgq_try_lock).");
}
return __message_queue->try_lock();
}
