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Normal multithreaded applications should not need the predicates from this section because almost any usage of these predicates is unsafe. For example checking the existence of a thread before signalling it is of no use as it may vanish between the two calls. Catching exceptions using catch/3 is the only safe way to deal with thread-existence errors.
These predicates are provided for diagnosis and monitoring tasks. See also section 10.5, describing more high-level primitives.
true. Othwerwise the property is not present.
epochyield different values for each thread.172There is no portable interface to obtain thread-specific CPU time and some operating systems provide no access to this information at all. On such systems the total process CPU is returned. Thread CPU time is supported on MS-Windows, Linux and MacOSX.