otMessageQueue struct

Initialize the message queue. MUST be called once and only once for a `otMessageQueue` instance before any other `otMessageQueue` functions. The behavior is undefined if other queue APIs are used with an `otMessageQueue` before it being initialized or if it is initialized more than once.

Adds a message to the end of the given message queue.

Adds a message at the head/front of the given message queue.

Removes a message from the given message queue.

Returns a pointer to the message at the head of the queue.

Returns a pointer to the next message in the queue by iterating forward (from head to tail).