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

   1 /* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
   2
   3 #ifndef LOADER_H
   4 #define LOADER_H
   5
   6 #include "base/i2-base.hpp"
   7 #include "base/string.hpp"
   8 #include <boost/thread/tss.hpp>
   9 #include <queue>
  10
  11 namespace icinga
  12 {
  13
  14 struct DeferredInitializer
  15 {
  16 public:
  17         DeferredInitializer(std::function<void ()> callback, int priority)
  18                 : m_Callback(std::move(callback)), m_Priority(priority)
  19         { }
  20
  21         bool operator<(const DeferredInitializer& other) const
  22         {
  23                 return m_Priority < other.m_Priority;
  24         }
  25
  26         void operator()()
  27         {
  28                 m_Callback();
  29         }
  30
  31 private:
  32         std::function<void ()> m_Callback;
  33         int m_Priority;
  34 };
  35
  36 /**
  37  * Loader helper functions.
  38  *
  39  * @ingroup base
  40  */
  41 class Loader
  42 {
  43 public:
  44         static void AddDeferredInitializer(const std::function<void ()>& callback, int priority = 0);
  45         static void ExecuteDeferredInitializers();
  46
  47 private:
  48         Loader();
  49
  50         static boost::thread_specific_ptr<std::priority_queue<DeferredInitializer> >& GetDeferredInitializers();
  51 };
  52
  53 }
  54
  55 #endif /* LOADER_H */