Many of the strings passed around in this protocol are of unspecified size and may, especially in the case of URLs, be larger than could fit within the body of a Wimp message. Therefore, they are defined in this spec as string_values.
These are also used in the Browser spec and are defined as being either :
· if < 256, offsets from the start of the message body (+20 in messages)
· if > 256, pointers to data held in shared memory (eg the RMA or a dynamic area).
It is always the responsibility of the sender to free the memory used for any pointers after they are no longer requied.
The protocol is defined in such a way that there should always be a reply received or the message will be bounced by the Wimp. In either case it is then safe for the sender to free the memory allocated.
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