Task cooperation and synchronization primitives

TiROS synchronization mechanisms include mutexes, counting semaphores, message queues, and event flags.

For all of these, TiROS supports blocking and non-blocking operation and timeouts. In all cases, the highest priority task that is waiting on any of these synchronization primitives has first access.

1. Mutexes.
2. Counting semaphores.
3. Message Queues.
4. Event Flags.

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