detach a thread
pthread_detach() function is used to indicate to the
implementation that storage for the thread thread can be
reclaimed when the thread terminates. If thread has not
pthread_detach() will not cause it to
terminate. The effect of multiple
calls on the same target thread is unspecified.
If successful, the
pthread_detach() function will return
zero. Otherwise an error number will be returned to indicate the error. Note
that the function does not change the value of errno as
it did for some drafts of the standard. These early drafts also passed a
pointer to pthread_t as the argument. Beware!
pthread_detach() will fail if:
- The implementation has detected that the value specified by
thread does not refer to a joinable thread.
- No thread could be found corresponding to that specified by the given
thread ID, thread.
pthread_detach() conforms to ISO/IEC