SharedObject.h

// WARNING: Changes to this file must be contributed back to Sawyer or else they will
//          be clobbered by the next update from Sawyer.  The Sawyer repository is at
//          https://github.com/matzke1/sawyer.
 
 
 
 
#ifndef Sawyer_SharedObject_H
#define Sawyer_SharedObject_H
 
#include <Sawyer/Sawyer.h>
#include <Sawyer/Synchronization.h>
 
namespace Sawyer {
 
class SAWYER_EXPORT SharedObject {
    template<class U> friend class SharedPointer;
    mutable SAWYER_THREAD_TRAITS::Mutex mutex_;
    mutable size_t nrefs_;
public:
    SharedObject(): nrefs_(0) {}
 
    SharedObject(const SharedObject&): nrefs_(0) {}
 
    virtual ~SharedObject() {
        ASSERT_require(nrefs_==0);
    }
 
    SharedObject& operator=(const SharedObject&) {
        return *this;
    }
};
 
} // namespace
 
#endif