1 files changed, 68 insertions, 0 deletions
diff --git a/db/dur_journal.h b/db/dur_journal.h
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+++ b/db/dur_journal.h
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+// @file dur_journal.h
+
+/**
+*    Copyright (C) 2010 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/>.
+*/
+
+#pragma once
+
+namespace mongo {
+    class AlignedBuilder;
+
+    namespace dur {
+
+        /** true if ok to cleanup journal files at termination. otherwise, files journal will be retained.
+        */
+        extern bool okToCleanUp;
+
+        /** at termination after db files closed & fsynced */
+        void journalCleanup();
+
+        /** assure journal/ dir exists. throws */
+        void journalMakeDir();
+
+        /** check if time to rotate files; assure a file is open.
+             done separately from the journal() call as we can do this part
+             outside of lock.
+            only called by durThread.
+         */
+        void journalRotate();
+
+        /** write/append to journal file *
+            @param buf - a buffer that will be written to the journal.
+            will not return until on disk
+        */
+        void journal(const AlignedBuilder& buf);
+
+        /** flag that something has gone wrong during writing to the journal
+            (not for recovery mode)
+        */
+        void journalingFailure(const char *msg);
+
+        /** read lsn from disk from the last run before doing recovery */
+        unsigned long long journalReadLSN();
+
+        unsigned long long getLastDataFileFlushTime();
+
+        /** never throws.
+            @return true if there are any journal files in the journal dir.
+        */
+        bool haveJournalFiles();
+
+        // in case disk controller buffers writes
+        const long long ExtraKeepTimeMs = 10000;
+
+    }
+}