56c69773ae
This CL also removes any unecessary references to the ANDROID definition. Review URL: http://codereview.appspot.com/5354049 git-svn-id: http://skia.googlecode.com/svn/trunk@2629 2bbb7eff-a529-9590-31e7-b0007b416f81
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
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/*
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* Copyright 2009 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkTRegistry_DEFINED
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#define SkTRegistry_DEFINED
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#include "SkTypes.h"
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/** Template class that registers itself (in the constructor) into a linked-list
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and provides a function-pointer. This can be used to auto-register a set of
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services, e.g. a set of image codecs.
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*/
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template <typename T, typename P> class SkTRegistry : SkNoncopyable {
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public:
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typedef T (*Factory)(P);
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SkTRegistry(Factory fact) {
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#ifdef SK_BUILD_FOR_ANDROID
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// work-around for double-initialization bug
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{
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SkTRegistry* reg = gHead;
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while (reg) {
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if (reg == this) {
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return;
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}
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reg = reg->fChain;
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}
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}
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#endif
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fFact = fact;
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fChain = gHead;
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gHead = this;
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}
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static const SkTRegistry* Head() { return gHead; }
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const SkTRegistry* next() const { return fChain; }
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Factory factory() const { return fFact; }
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private:
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Factory fFact;
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SkTRegistry* fChain;
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static SkTRegistry* gHead;
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};
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// The caller still needs to declare an instance of this somewhere
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template <typename T, typename P> SkTRegistry<T, P>* SkTRegistry<T, P>::gHead;
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#endif
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