Update of contrib stuff from massimo.

contrib/miscutil/misc_utils.c

@@ -0,0 +1,50 @@
+/*
+ * utils.c --
+ *
+ * This file defines various Postgres utility functions.
+ *
+ * Copyright (c) 1996, Massimo Dal Zotto <dz@cs.unitn.it>
+ */
+
+#include <unistd.h>
+
+#include "postgres.h"
+#include "utils/palloc.h"
+
+#include "misc_utils.h"
+
+extern int ExecutorLimit(int limit);
+extern void Async_Unlisten(char *relname, int pid);
+
+int
+query_limit(int limit)
+{
+    return ExecutorLimit(limit);
+}
+
+int
+backend_pid()
+{
+    return getpid();
+}
+
+int
+unlisten(char *relname)
+{
+    Async_Unlisten(relname, getpid());
+    return 0;
+}
+
+int
+max(int x, int y)
+{
+    return ((x > y) ? x : y);
+}
+
+int
+min(int x, int y)
+{
+    return ((x < y) ? x : y);
+}
+
+/* end of file */