use checksum to make curop threadsafe SERVER-723

1 files changed, 32 insertions, 0 deletions

diff --git a/util/mongoutils/checksum.h b/util/mongoutils/checksum.h
new file mode 100644
index 00000000000..6beb7f42ccf
--- /dev/null
+++ b/util/mongoutils/checksum.h
@@ -0,0 +1,32 @@
+/** @checksum.h */
+
+/*    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.
+ */
+
+#pragma once
+
+namespace mongoutils {
+
+    /**
+     * this is a silly temporary implementation
+     */
+    inline int checksum( const char* x , int size ){
+        int ck = 0;
+        for ( int i=0; i<size; i++ )
+            ck += ( (int)x[i] * ( i + 1 ) );
+        return ck;
+    }
+
+}