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      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 
     49