skia/config/sk_ref_cnt_ext_debug.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SK_REF_CNT_EXT_DEBUG_H_
   6 #define SK_REF_CNT_EXT_DEBUG_H_
   7
   8 #ifdef SK_REF_CNT_EXT_RELEASE_H_
   9 #error Only one SkRefCnt should be used.
  10 #endif
  11
  12 // Alternate implementation of SkRefCnt for Chromium debug builds
  13 class SK_API SkRefCnt : public SkRefCntBase {
  14 public:
  15   SkRefCnt() : flags_(0) {}
  16   void ref() const { SkASSERT(flags_ != AdoptionRequired_Flag); SkRefCntBase::ref(); }
  17   void adopted() const { flags_ |= Adopted_Flag; }
  18   void requireAdoption() const { flags_ |= AdoptionRequired_Flag; }
  19   void deref() const { SkRefCntBase::unref(); }
  20 private:
  21   enum {
  22     Adopted_Flag = 0x1,
  23     AdoptionRequired_Flag = 0x2,
  24   };
  25
  26   mutable int flags_;
  27 };
  28
  29 // Bootstrap for Blink's WTF::RefPtr
  30
  31 namespace WTF {
  32   inline void adopted(const SkRefCnt* object) {
  33     if (!object)
  34       return;
  35     object->adopted();
  36   }
  37   inline void requireAdoption(const SkRefCnt* object) {
  38     if (!object)
  39       return;
  40     object->requireAdoption();
  41   }
  42 };
  43
  44 using WTF::adopted;
  45 using WTF::requireAdoption;
  46
  47 #endif
  48