Lines Matching refs:is

22    Often it is desirable to destroy an object when it is known that it
23    will not be used in the future. Reference counting is a common serial
33    -  If there are cycles of references, basic reference counting is
34       insufficient unless the cycle is explicitly broken.
37    -  Atomic counting is relatively expensive in hardware.
46    Thread-safe reference counting is like serial reference counting,
47    except that the increment/decrement is done atomically, and the
48    decrement and test "count is zero?" must act as a single atomic
75    It is incorrect to use a separate read for testing if the count is
91    writes complete before the object is deleted.
94    There is no simple way to atomically copy a pointer and increment its
96    copying and the increment where the reference count is too low, and
115    pointers are unshared but the referent is shared. Associate a
116    *weight* with each pointer. The reference count is the sum of the
119    ``x`` and ``x'``. If the weight of ``x`` is too low to split, then first add a