SERVER-17880 Rename OpTime to Timestamp

1 files changed, 116 insertions, 0 deletions

diff --git a/src/mongo/bson/timestamp.h b/src/mongo/bson/timestamp.h
new file mode 100644
index 00000000000..b223b5deb50
--- /dev/null
+++ b/src/mongo/bson/timestamp.h
@@ -0,0 +1,116 @@
+/*    Copyright 2009 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/base/data_view.h"
+#include "mongo/bson/util/builder.h"
+#include "mongo/util/assert_util.h"
+
+namespace mongo {
+
+    /* Timestamp: A combination of current second plus an ordinal value.
+     */
+#pragma pack(4)
+    class Timestamp {
+        unsigned i; // ordinal comes first so we can do a single 64 bit compare on little endian
+        unsigned secs;
+    public:
+        unsigned getSecs() const {
+            return secs;
+        }
+        unsigned getInc() const {
+            return i;
+        }
+
+        Timestamp(Date_t date) {
+            reinterpret_cast<unsigned long long&>(*this) = date.millis;
+            dassert( (int)secs >= 0 );
+        }
+
+        Timestamp(unsigned a, unsigned b) {
+            secs = a;
+            i = b;
+            dassert( (int)secs >= 0 );
+        }
+        Timestamp( const Timestamp& other ) { 
+            secs = other.secs;
+            i = other.i;
+            dassert( (int)secs >= 0 );
+        }
+        Timestamp() {
+            secs = 0;
+            i = 0;
+        }
+
+        // Maximum Timestamp value.
+        static Timestamp max();
+
+        unsigned long long asULL() const {
+            return reinterpret_cast<const unsigned long long*>(&i)[0];
+        }
+        long long asLL() const {
+            return reinterpret_cast<const long long*>(&i)[0];
+        }
+
+        bool isNull() const { return secs == 0; }
+
+        std::string toStringLong() const;
+
+        std::string toStringPretty() const;
+
+        std::string toString() const;
+
+        bool operator==(const Timestamp& r) const {
+            return i == r.i && secs == r.secs;
+        }
+        bool operator!=(const Timestamp& r) const {
+            return !(*this == r);
+        }
+        bool operator<(const Timestamp& r) const {
+            if ( secs != r.secs )
+                return secs < r.secs;
+            return i < r.i;
+        }
+        bool operator<=(const Timestamp& r) const {
+            return *this < r || *this == r;
+        }
+        bool operator>(const Timestamp& r) const {
+            return !(*this <= r);
+        }
+        bool operator>=(const Timestamp& r) const {
+            return !(*this < r);
+        }
+
+        // Append the BSON representation of this Timestamp to the given BufBuilder with the given
+        // name. This lives here because Timestamp manages its own serialization format.
+        void append(BufBuilder& builder, const StringData& fieldName) const;
+
+    };
+#pragma pack()
+
+} // namespace mongo