[boost] Synchronize Pointer (thread safe wrapper)

Is there any interest in adding to the boost library a synchronized pointer class which is a thread safe wrapper class for an object instance. If so, please examine the following source code, and please post feedback. http://code.axter.com/sync_ptr.h http://code.axter.com/sync_ctrl.h Or you can download it from the boost sandbox. It's listed as sync_ptr.zip The following link has the source code for a test case application: http://code.axter.com/TestCaseAppforThreadSafeObject_sourcecode.zip