C++

29    Threads: Programming with Concurrency

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• ThreadA “strand” of program execution that can run concurrently with other threads.

• SemaphoresMechanism to limit concurrent access to a shared resource. A semaphore exists per shared resource or group of resources.

• MutexSemaphores that allow access to exactly one thread.

• LockGroup of classes that define the range in which access should be protected using a mutex. A lock exists per thread and resource.

• Critical sectionProgram piece protected from concurrent execution using lock and mutex.

• Data raceCondition where multiple threads unpredictably modify data.

• DeadlockCondition when two threads holding locks on mutexes block each other, and neither can proceed.