releases the resources of a virtual ring buffer controlled by a
static structure initialized by
When the calling program has no more need for the virtual ring buffer,
should be called to release all resources.
The caller is responsible for the original structure space.
specifies the virtual ring buffer to be uninitialized.
On success, 0 is returned.
On error, -1 is returned.
If an error is returned, then
will have the following value: