void *
pthread_getspecific(pthread_key_t key)
)
function returns the value currently bound to the specified
key
on behalf of the calling thread.
The effect of calling
pthread_getspecific()
with a
key
value not obtained from
pthread_key_create()
or after
key
has been deleted with
pthread_key_delete()
is undefined.
pthread_getspecific()
may be called from a thread-specific data destructor function.
)
function will return the thread-specific data value associated with the given
key.
If no thread-specific data value is associated with
key,
then the value NULL is returned.
)
conforms to
ISO/IEC 9945-1:1996 (``POSIX.1'') .