Index: vendor/illumos/dist/lib/libdtrace/common/dt_pq.h
===================================================================
--- vendor/illumos/dist/lib/libdtrace/common/dt_pq.h	(nonexistent)
+++ vendor/illumos/dist/lib/libdtrace/common/dt_pq.h	(revision 249292)
@@ -0,0 +1,51 @@
+/*
+ * CDDL HEADER START
+ *
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2012 by Delphix. All rights reserved.
+ */
+
+#ifndef	_DT_PQ_H
+#define	_DT_PQ_H
+
+#include <dtrace.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef uint64_t (*dt_pq_value_f)(void *, void *);
+
+typedef struct dt_pq {
+	dtrace_hdl_t *dtpq_hdl;		/* dtrace handle */
+	void **dtpq_items;		/* array of elements */
+	uint_t dtpq_size;		/* count of allocated elements */
+	uint_t dtpq_last;		/* next free slot */
+	dt_pq_value_f dtpq_value;	/* callback to get the value */
+	void *dtpq_arg;			/* callback argument */
+} dt_pq_t;
+
+extern dt_pq_t *dt_pq_init(dtrace_hdl_t *, uint_t size, dt_pq_value_f, void *);
+extern void dt_pq_fini(dt_pq_t *);
+
+extern void dt_pq_insert(dt_pq_t *, void *);
+extern void *dt_pq_pop(dt_pq_t *);
+extern void *dt_pq_walk(dt_pq_t *, uint_t *);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _DT_PQ_H */