Move the definition of the struct unrhdr into a separate header file,

to allow embedding the struct.  Add init_unrhdr(9) initializer, which
sets up preallocated unrhdr.

Reviewed by:	alc
Tested by:	pho, bf

2 files changed, 52 insertions, 0 deletions

diff --git a/sys/sys/_unrhdr.h b/sys/sys/_unrhdr.h
new file mode 100644
index 000000000000..f3c25d165d80
--- /dev/null
+++ b/sys/sys/_unrhdr.h
@@ -0,0 +1,51 @@
+/*-
+ * Copyright (c) 2004 Poul-Henning Kamp
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_UNRHDR_H
+#define _SYS_UNRHDR_H
+
+#include <sys/queue.h>
+
+struct mtx;
+
+/* Header element for a unr number space. */
+
+struct unrhdr {
+	TAILQ_HEAD(unrhd,unr)	head;
+	u_int			low;	/* Lowest item */
+	u_int			high;	/* Highest item */
+	u_int			busy;	/* Count of allocated items */
+	u_int			alloc;	/* Count of memory allocations */
+	u_int			first;	/* items in allocated from start */
+	u_int			last;	/* items free at end */
+	struct mtx		*mtx;
+	TAILQ_HEAD(unrfr,unr)	ppfree;	/* Items to be freed after mtx
+					   lock dropped */
+};
+
+#endif
diff --git a/sys/sys/systm.h b/sys/sys/systm.h
index 4887d71f5675..e3ea9cf20620 100644
--- a/sys/sys/systm.h
+++ b/sys/sys/systm.h
@@ -396,6 +396,7 @@ int root_mounted(void);
  */
 struct unrhdr;
 struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
+void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex);
 void delete_unrhdr(struct unrhdr *uh);
 void clean_unrhdr(struct unrhdr *uh);
 void clean_unrhdrl(struct unrhdr *uh);