1 files changed, 16 insertions, 2 deletions
diff --git a/src/backend/lib/pairingheap.c b/src/backend/lib/pairingheap.c
index fe1deba13ec..7858e5e076b 100644
--- a/src/backend/lib/pairingheap.c
+++ b/src/backend/lib/pairingheap.c
@@ -44,12 +44,26 @@ pairingheap_allocate(pairingheap_comparator compare, void *arg)
 	pairingheap *heap;
 
 	heap = (pairingheap *) palloc(sizeof(pairingheap));
+	pairingheap_initialize(heap, compare, arg);
+
+	return heap;
+}
+
+/*
+ * pairingheap_initialize
+ *
+ * Same as pairingheap_allocate(), but initializes the pairing heap in-place
+ * rather than allocating a new chunk of memory.  Useful to store the pairing
+ * heap in a shared memory.
+ */
+void
+pairingheap_initialize(pairingheap *heap, pairingheap_comparator compare,
+					   void *arg)
+{
 	heap->ph_compare = compare;
 	heap->ph_arg = arg;
 
 	heap->ph_root = NULL;
-
-	return heap;
 }
 
 /*