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>int pthread&#0095;key&#0095;create(pthread&#0095;key&#0095;t &#0042;key,
	               void (&#0042;destructor)(void &#0042;)); 
int pthread&#0095;setspecific(pthread&#0095;key&#0095;t key, const void &#0042;pointer); 
void &#0042;pthread&#0095;getspecific(pthread&#0095;key&#0095;t key); 
int pthread&#0095;key&#0095;delete(pthread&#0095;key&#0095;t key);</PRE
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>    The value of PTHREAD&#0095;DESTRUCTOR&#0095;ITERATIONS is
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    option. This controls the number of times that a key destructor
    will be called while the data item remains non-NULL.
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>    The value of PTHREAD&#0095;KEYS&#0095;MAX is provided
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    option. This defines the maximum number of per-thread data items
    supported. The POSIX standard calls for this to be a minimum of
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