Thread_Safe.h

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#ifndef joedb_Thread_Safe_declared
#define joedb_Thread_Safe_declared
 
#include <mutex>
#include <utility>
 
namespace joedb
{
 template<typename T> class Lock;
 
 template<typename T> class Thread_Safe
 {
  friend class Lock<T>;
 
  private:
   std::mutex mutex;
   T t;
 
  public:
   template<class... Arguments> Thread_Safe(Arguments &&... a):
    t(std::forward<Arguments>(a)...)
   {
   }
 };
 
 template<typename T> class Lock
 {
  private:
   std::unique_lock<std::mutex> lock;
   T &t;
 
  public:
   Lock(Thread_Safe<T> &t): lock(t.mutex), t(t.t)
   {
   }
 
   operator std::unique_lock<std::mutex> &() {return lock;}
 
   auto *operator->() const {return &t;}
   auto *operator->() {return &t;}
   auto &operator*() const {return t;}
   auto &operator*() {return t;}
 };
}
 
#endif