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Using the new 'join()' function, the caller can explicitly block for the completion of the thread's 'entry()' function. The test case for this feature can be found at 'os/src/test/thread_join'. For hybrid Linux/Genode programs, the 'Thread_base::join()' does not map directly to 'pthread_join'. The latter function gets already called by the destructor of 'Thread_base'. According to the documentation, subsequent calls of 'pthread_join' for one thread may result in undefined behaviour. So we use a 'Genode::Lock' on this platform, which is in line with the other platforms. Related to #194, #501
This is generic part of the Genode implementation. It consists of two parts: :_Core_: is the ultimate root of the Genode application tree and provides abstractions for the lowest-level hardware resources such as RAM, ROM, CPU, and generic device access. All generic parts of Core can be found here - for system-specific implementations refer to the appropriate 'base-<system>' directory. :_Base libraries and protocols_: that are used by each Genode component to interact with other components. This is the glue that holds everything together.