OS Abstraction Modules

Overview

Modules that abstract OS functionality, excluding networking.

Modules
	thread (Threading)
	Platform-neutral threads.
	timer (Timers)
	Platform-neutral system timers.
	event_group (Event Groups)
	Event group objects.
	mutex (Mutexes)
	Mutual-exclusion (mutex) objects.
	queue (RTOS queues)
	Platform-neutral blocking RTOS queues.
	recursive_mutex (Recursive Mutexes)
	Mutual-exclusion (mutex) objects with recursion support.
	rwlock (Read-Write Locks)
	Reader-writer lock objects.
	sem (Counting Semaphores)
	Counting semaphore objects.
	signal (Signals)
	Signal objects.