39 lines
874 B
C++
39 lines
874 B
C++
/*
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the LICENSE
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* file in the root directory of this source tree.
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*
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*/
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#pragma once
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#include <fb/assert.h>
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#include <utility>
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namespace facebook {
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// Class that lets you declare a global but does not add a static constructor
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// to the binary. Eventually I'd like to have this auto-initialize in a
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// multithreaded environment but for now it's easiest just to use manual
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// initialization.
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template <typename T>
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class StaticInitialized {
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public:
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constexpr StaticInitialized() :
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m_instance(nullptr)
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{}
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template <typename ...Args>
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void initialize(Args&&... arguments) {
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FBASSERT(!m_instance);
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m_instance = new T(std::forward<Args>(arguments)...);
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}
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T* operator->() const {
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return m_instance;
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}
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private:
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T* m_instance;
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};
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}
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