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6229f4d9bf
Now that all values are in one place, there is no reason for this numbering with gaps anymore. If you need to insert a new value in between, you can just do so in the enum. This reverses the sort order of the enum, thereby requiring a change to the sort order of the std::priority_queue containing the elements.
62 lines
1.4 KiB
C++
62 lines
1.4 KiB
C++
/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
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#ifndef LOADER_H
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#define LOADER_H
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#include "base/i2-base.hpp"
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#include "base/initialize.hpp"
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#include "base/string.hpp"
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#include <boost/thread/tss.hpp>
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#include <queue>
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namespace icinga
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{
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struct DeferredInitializer
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{
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public:
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DeferredInitializer(std::function<void ()> callback, InitializePriority priority)
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: m_Callback(std::move(callback)), m_Priority(priority)
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{ }
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bool operator>(const DeferredInitializer& other) const
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{
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return m_Priority > other.m_Priority;
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}
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void operator()()
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{
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m_Callback();
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}
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private:
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std::function<void ()> m_Callback;
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InitializePriority m_Priority;
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};
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/**
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* Loader helper functions.
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*
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* @ingroup base
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*/
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class Loader
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{
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public:
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static void AddDeferredInitializer(const std::function<void ()>& callback, InitializePriority priority = InitializePriority::Default);
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static void ExecuteDeferredInitializers();
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private:
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Loader();
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// Deferred initializers are run in the order of the definition of their enum values.
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// Therefore, initializers that should be run first have lower enum values and
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// the order of the std::priority_queue has to be reversed using std::greater.
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using DeferredInitializerPriorityQueue = std::priority_queue<DeferredInitializer, std::vector<DeferredInitializer>, std::greater<>>;
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static boost::thread_specific_ptr<DeferredInitializerPriorityQueue>& GetDeferredInitializers();
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};
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}
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#endif /* LOADER_H */
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