1 files changed, 102 insertions, 0 deletions
diff --git a/usr/src/uts/common/sys/modhash_impl.h b/usr/src/uts/common/sys/modhash_impl.h
new file mode 100644
index 0000000000..25e45cec23
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+++ b/usr/src/uts/common/sys/modhash_impl.h
@@ -0,0 +1,102 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_MODHASH_IMPL_H
+#define	_SYS_MODHASH_IMPL_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * Internal details for the kernel's generic hash implementation.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef _KERNEL
+
+#include <sys/ksynch.h>
+#include <sys/modhash.h>
+
+struct mod_hash_entry {
+	mod_hash_key_t mhe_key;			/* stored hash key	*/
+	mod_hash_val_t mhe_val;			/* stored hash value	*/
+	struct mod_hash_entry *mhe_next;	/* next item in chain	*/
+};
+
+struct mod_hash_stat {
+	ulong_t mhs_hit;	/* tried a 'find' and it succeeded */
+	ulong_t mhs_miss;	/* tried a 'find' but it failed */
+	ulong_t mhs_coll;	/* occur when insert fails because of dup's */
+	ulong_t mhs_nelems;	/* total number of stored key/value pairs */
+	ulong_t mhs_nomem;	/* number of times kmem_alloc failed */
+};
+
+struct mod_hash {
+	krwlock_t	mh_contents;	/* lock protecting contents */
+	char		*mh_name;	/* hash name */
+	int		mh_sleep;	/* kmem_alloc flag */
+	size_t		mh_nchains;	/* # of elements in mh_entries */
+
+	/* key and val destructor */
+	void    (*mh_kdtor)(mod_hash_key_t);
+	void    (*mh_vdtor)(mod_hash_val_t);
+
+	/* key comparator */
+	int	(*mh_keycmp)(mod_hash_key_t, mod_hash_key_t);
+
+	/* hash algorithm, and algorithm-private data */
+	uint_t  (*mh_hashalg)(void *, mod_hash_key_t);
+	void    *mh_hashalg_data;
+
+	struct mod_hash	*mh_next;	/* next hash in list */
+
+	struct mod_hash_stat mh_stat;
+
+	struct mod_hash_entry *mh_entries[1];
+};
+
+/*
+ * MH_SIZE()
+ * 	Compute the size of a mod_hash_t, in bytes, given the number of
+ * 	elements it contains.
+ */
+#define	MH_SIZE(n) \
+	(sizeof (mod_hash_t) + ((n) - 1) * (sizeof (struct mod_hash_entry *)))
+
+/*
+ * Module initialization; called once.
+ */
+void mod_hash_init(void);
+
+#endif /* _KERNEL */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SYS_MODHASH_IMPL_H */