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Add set of event queue composition functions #13
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The equeue_background function requires only a user-provided update function, which is called to indicate when the queue should be dispatched. The equeue_background function adds a new level of composability to the event queue library. Allowing equeues to be easily backgrounded on hardware timers or even be combined with existing event loops.
The equeue_chain function chains one queue onto a target queue. Calling equeue_dispatch on the target queue will also dispatch events on the target, however each queue uses their own buffers and events are handled independently. The equeue_chain adds a very powerful level of composability for equeues freely built on the equeue_background function. This allows multiple modules to own their own event queues while maintaining composability on threadless systems.
Add set of event queue composition functions
Adds the following: - EventQueue::background - EventQueue::chain
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Adds two new composition functions for composing multiple event queues:
EventQueue::background- The background function requires only a user-provided update function, which is called to indicate when the queue should be dispatched.EventQueue::chain- The chain function chains one queue onto a target queue. Calling dispatch on the target queue will also dispatch events on the target, however each queue uses their own buffers and events are handled independently.These two functions add a new level of composability to mbed-events. EventsQueues can be easily backgrounded on hardware timers, or even combined with existing event loops. Multiple, independent EventQueues can be combined to easily share a single thread of execution between module boundaries. These functions should add significant flexibility to how a user's system can be architected.