1 files changed, 52 insertions, 0 deletions
diff --git a/src/mongo/util/mmap_mm.cpp b/src/mongo/util/mmap_mm.cpp
new file mode 100644
index 00000000000..ec2400e02d3
--- /dev/null
+++ b/src/mongo/util/mmap_mm.cpp
@@ -0,0 +1,52 @@
+// mmap_mm.cpp - in memory (no file) version
+
+/*    Copyright 2009 10gen Inc.
+ *
+ *    Licensed 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 "pch.h"
+#include "mmap.h"
+
+/* in memory (no file) version */
+
+namespace mongo {
+
+    MemoryMappedFile::MemoryMappedFile() {
+        fd = 0;
+        maphandle = 0;
+        view = 0;
+        len = 0;
+    }
+
+    void MemoryMappedFile::close() {
+        if ( view )
+            free( view );
+        view = 0;
+        len = 0;
+    }
+
+    void* MemoryMappedFile::map(const char *filename, long& length , int options ) {
+        assert( length );
+        view = malloc( length );
+        return view;
+    }
+
+    void MemoryMappedFile::flush(bool sync) {
+    }
+
+    void MemoryMappedFile::_lock() {}
+    void MemoryMappedFile::_unlock() {}
+
+}
+