Function GetPrivateRefCount

src/backend/storage/buffer/bufmgr.c:402–419

* Returns how many times the passed buffer is pinned by this backend. * * Only works for shared memory buffers! */

 * Only works for shared memory buffers!
 */
static inline int32
GetPrivateRefCount(Buffer buffer)
{
	PrivateRefCountEntry *ref;

	Assert(BufferIsValid(buffer));
	Assert(!BufferIsLocal(buffer));

	/*
	 * Not moving the entry - that's ok for the current users, but we might
	 * want to change this one day.
	 */
	ref = GetPrivateRefCountEntry(buffer, false);

	if (ref == NULL)
		return 0;
	return ref->refcount;
}

/*
 * Release resources used to track the reference count of a buffer which we no