SERVER-14413 box mmapv1 further, retire structure directory

1 files changed, 69 insertions, 0 deletions

diff --git a/src/mongo/db/storage/mmap_v1/catalog/index_details.h b/src/mongo/db/storage/mmap_v1/catalog/index_details.h
new file mode 100644
index 00000000000..b2f34ec0681
--- /dev/null
+++ b/src/mongo/db/storage/mmap_v1/catalog/index_details.h
@@ -0,0 +1,69 @@
+// index_details.h
+
+/**
+*    Copyright (C) 2008 10gen Inc.
+*
+*    This program is free software: you can redistribute it and/or  modify
+*    it under the terms of the GNU Affero General Public License, version 3,
+*    as published by the Free Software Foundation.
+*
+*    This program is distributed in the hope that it will be useful,
+*    but WITHOUT ANY WARRANTY; without even the implied warranty of
+*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*    GNU Affero General Public License for more details.
+*
+*    You should have received a copy of the GNU Affero General Public License
+*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*
+*    As a special exception, the copyright holders give permission to link the
+*    code of portions of this program with the OpenSSL library under certain
+*    conditions as described in each individual source file and distribute
+*    linked combinations including the program with the OpenSSL library. You
+*    must comply with the GNU Affero General Public License in all respects for
+*    all of the code used other than as permitted herein. If you modify file(s)
+*    with this exception, you may extend this exception to your version of the
+*    file(s), but you are not obligated to do so. If you do not wish to do so,
+*    delete this exception statement from your version. If you delete this
+*    exception statement from all source files in the program, then also delete
+*    it in the license file.
+*/
+
+#pragma once
+
+#include "mongo/db/diskloc.h"
+
+namespace mongo {
+
+    /* Details about a particular index. There is one of these effectively for each object in
+       system.namespaces (although this also includes the head pointer, which is not in that
+       collection).
+
+       This is an internal part of the catalog.  Nothing outside of the catalog should use this.
+
+       ** MemoryMapped Record ** (i.e., this is on disk data)
+     */
+    struct IndexDetails {
+        /**
+         * btree head disk location
+         */
+        DiskLoc head;
+
+        /* Location of index info object. Format:
+
+             { name:"nameofindex", ns:"parentnsname", key: {keypattobject}
+               [, unique: <bool>, background: <bool>, v:<version>]
+             }
+
+           This object is in the system.indexes collection.  Note that since we
+           have a pointer to the object here, the object in system.indexes MUST NEVER MOVE.
+        */
+        DiskLoc info;
+
+        /**
+         * makes head and info invalid
+        */
+        void _reset();
+
+    };
+
+} // namespace mongo