+void * _PDCLIB_allocpages( size_t n );
+
+/* A system call which frees the n pages of memory pointed to by p */
+void _PDCLIB_freepages( void * p, size_t n );
+
+#ifdef _PDCLIB_HAVE_REALLOCPAGES
+/* A system call which attempts to reallocate the group of \p on pages starting
+ at \p p, resizing the chunk to be \p nn pages long. If \p mayMove is true,
+ then then the group of pages may move; otherwise, if the group cannot be
+ resized in its current position, failure must be reported.