The Tor Browser: gfx/skia/trunk/include/core/SkTRegistry.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     2 /*

     3  * Copyright 2009 The Android Open Source Project

     4  *

     5  * Use of this source code is governed by a BSD-style license that can be

     6  * found in the LICENSE file.

     7  */

    10 #ifndef SkTRegistry_DEFINED

    11 #define SkTRegistry_DEFINED

    13 #include "SkTypes.h"

    15 /** Template class that registers itself (in the constructor) into a linked-list

    16     and provides a function-pointer. This can be used to auto-register a set of

    17     services, e.g. a set of image codecs.

    18  */

    19 template <typename T> class SkTRegistry : SkNoncopyable {

    20 public:

    21     typedef T Factory;

    23     explicit SkTRegistry(T fact) : fFact(fact) {

    24 #ifdef SK_BUILD_FOR_ANDROID

    25         // work-around for double-initialization bug

    26         {

    27             SkTRegistry* reg = gHead;

    28             while (reg) {

    29                 if (reg == this) {

    30                     return;

    31                 }

    32                 reg = reg->fChain;

    33             }

    34         }

    35 #endif

    36         fChain = gHead;

    37         gHead  = this;

    38     }

    40     static const SkTRegistry* Head() { return gHead; }

    42     const SkTRegistry* next() const { return fChain; }

    43     const Factory& factory() const { return fFact; }

    45 private:

    46     Factory      fFact;

    47     SkTRegistry* fChain;

    49     static SkTRegistry* gHead;

    50 };

    52 // The caller still needs to declare an instance of this somewhere

    53 template <typename T> SkTRegistry<T>* SkTRegistry<T>::gHead;

    55 #endif

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