b9c1b51e45
*** to conform to clang-format’s LLVM style. This kind of mass change has
*** two obvious implications:
Firstly, merging this particular commit into a downstream fork may be a huge
effort. Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit. The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):
find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;
The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.
Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit. There are alternatives available that will attempt
to look through this change and find the appropriate prior commit. YMMV.
llvm-svn: 280751
54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
//===-- MIUtilSingletonBase.h -----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#pragma once
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namespace MI {
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// MI::ISingleton base class usage:
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//
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// class CMIDerivedClass
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// : public MI::ISingleton< CMIDerivedClass >
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// {
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// friend MI::ISingleton< CMIDerivedClass >;
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//
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// // Overridden:
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// public:
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// // From MI::ISingleton
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// bool Initialize() override;
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// bool Shutdown() override;
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// };
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//++
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//============================================================================
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// Details: Base class for the singleton pattern.
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// Gotchas: Derived class must specify MI::ISingleton<> as a friend class.
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//--
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template <typename T> class ISingleton {
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// Statics:
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public:
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// Return an instance of the derived class
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static T &Instance() {
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// This will fail if the derived class has not
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// declared itself to be a friend of MI::ISingleton
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static T instance;
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return instance;
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}
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// Overrideable:
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public:
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virtual bool Initialize() = 0;
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virtual bool Shutdown() = 0;
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//
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/* dtor */ virtual ~ISingleton() {}
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};
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} // namespace MI
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