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c62a2d540d
This new function is made around the loop that scans a ring for new messages and dispatches them to a message handler. It also takes ring flags (WAIT, NEW, etc) and offset pointers that the caller will use to initialize/reuse/update the current processing offset. The caller is still responsible for presetting it to ~0 before the first call if it wants the function to automatically adjust it (or set it to the correct value). The function may also return the last_ofs that was known before releasing the lock so that the caller knows what to compare against and if it needs to restart processing or not. The context remains a void* so that should not necessarily depend on an appctx. The current "show ring" code was ported to this and it continues to work as expected.