OpenSolaris Launch

1 files changed, 108 insertions, 0 deletions

diff --git a/usr/src/lib/libmtmalloc/common/mtmalloc_impl.h b/usr/src/lib/libmtmalloc/common/mtmalloc_impl.h
new file mode 100644
index 0000000000..112ea3e5a6
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+++ b/usr/src/lib/libmtmalloc/common/mtmalloc_impl.h
@@ -0,0 +1,108 @@
+/*
+ * 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 1998-2003 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _MTMALLOC_IMPL_H
+#define	_MTMALLOC_IMPL_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * Various data structures that define the guts of the mt malloc
+ * library.
+ */
+
+#include <sys/types.h>
+#include <synch.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct cache {
+	mutex_t mt_cache_lock;	/* lock for this data structure */
+	caddr_t mt_freelist;	/* free block bit mask */
+	caddr_t mt_arena;	/* addr of arena for actual dblks */
+	size_t  mt_nfree;	/* how many freeblocks do we have */
+	size_t mt_size;		/* size of this cache */
+	size_t mt_span;		/* how long is this cache */
+	struct cache *mt_next;	/* next cache in list */
+	int mt_hunks;		/* at creation time what chunk size */
+} cache_t;
+
+typedef struct oversize {
+	struct oversize *next_bysize;
+	struct oversize *prev_bysize;
+	struct oversize *next_byaddr;
+	struct oversize *prev_byaddr;
+	struct oversize *hash_next;
+	caddr_t addr;
+	size_t  size;
+} oversize_t;
+
+typedef struct cache_head {
+	cache_t *mt_cache;
+	cache_t *mt_hint;
+} cache_head_t;
+
+/* used to avoid false sharing, should be power-of-2 >= cache coherency size */
+#define	CACHE_COHERENCY_UNIT	64
+
+#define	PERCPU_SIZE	CACHE_COHERENCY_UNIT
+#define	PERCPU_PAD	(PERCPU_SIZE - sizeof (mutex_t) - \
+			sizeof (cache_head_t *))
+
+typedef struct percpu {
+	mutex_t mt_parent_lock;	/* used for hooking in new caches */
+	cache_head_t *mt_caches;
+	char mt_pad[PERCPU_PAD];
+} percpu_t;
+
+typedef uint_t (*curcpu_func)(void);
+
+#define	DATA_SHIFT	1
+#define	TAIL_SHIFT	2
+
+/*
+ * Oversize bit definitions: 3 bits to represent the oversize for
+ * head fragment, data itself, and tail fragment.
+ * If the head fragment is oversize, the first bit is on.
+ * If the data itself is oversize, the second bit is on.
+ * If the tail fragment is oversize, then the third bit is on.
+ */
+#define	NONE_OVERSIZE		0x0
+#define	HEAD_OVERSIZE		0x1
+#define	DATA_OVERSIZE		0x2
+#define	HEAD_AND_DATA_OVERSIZE	0x3
+#define	TAIL_OVERSIZE		0x4
+#define	HEAD_AND_TAIL_OVERSIZE	0x5
+#define	DATA_AND_TAIL_OVERSIZE	0x6
+#define	ALL_OVERSIZE		0x7
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _MTMALLOC_IMPL_H */