- Alias is the alias name of thread Id.
- Current detached status of the thread.
- Integer identifier for the thread. Can be used as argument to the thread predicates, but applications must be aware that these references are reused.
- Current status of the thread. Status is one of:
- The thread is running. This is the initial status of a thread. Please note that threads waiting for something are considered running too.
- Only if the thread is an engine (see section 10). Indicates that the engine is currently not associated with an OS thread.
- The Goal of the thread has been completed and failed.
- The Goal of the thread has been completed and succeeded.
- The Goal of the thread has been terminated using thread_exit/1 with Term as argument. If the underlying native thread has exited (using pthread_exit()) Term is unbound.
- The Goal of the thread has been terminated due to an uncaught exception (see throw/1 and catch/3).
- If the thread is an engine (see chapter
10), Boolean is
true. Othwerwise the property is not present.
- If the thread is an engine that is currently attached to a thread, ThreadId is the thread that executes the engine.
- Thread identifier used by the operating system for the calling thread. Not available on all OSes. This is the same as the Prolog flag system_thread_id for the calling thread. Access to the system thread identifier can, on some systems, be used to gain additional control over or information about Prolog threads.