1 files changed, 40 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/legacystore/IdSequence.cpp b/qpid/cpp/src/qpid/legacystore/IdSequence.cpp
new file mode 100644
index 0000000000..975b1107e7
--- /dev/null
+++ b/qpid/cpp/src/qpid/legacystore/IdSequence.cpp
@@ -0,0 +1,40 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+#include "qpid/legacystore/IdSequence.h"
+
+using namespace mrg::msgstore;
+using qpid::sys::Mutex;
+
+IdSequence::IdSequence() : id(1) {}
+
+u_int64_t IdSequence::next()
+{
+    Mutex::ScopedLock guard(lock);
+    if (!id) id++; // avoid 0 when folding around
+    return id++;
+}
+
+void IdSequence::reset(uint64_t value)
+{
+    //deliberately not threadsafe, used only on recovery
+    id = value;
+}