granicus.if.org Git - icinga2/blob - lib/base/singleton.hpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2018 Icinga Development Team (https://www.icinga.com/)  *
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  19
  20 #ifndef SINGLETON_H
  21 #define SINGLETON_H
  22
  23 #include "base/i2-base.hpp"
  24 #include <boost/thread/mutex.hpp>
  25
  26 namespace icinga
  27 {
  28
  29 /**
  30  * A singleton.
  31  *
  32  * @ingroup base
  33  */
  34 template<typename T>
  35 class Singleton
  36 {
  37 public:
  38         static T *GetInstance()
  39         {
  40                 static T instance;
  41                 return &instance;
  42         }
  43 };
  44
  45 }
  46
  47 #endif /* SINGLETON_H */