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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SK_REF_CNT_EXT_DEBUG_H_
#define SK_REF_CNT_EXT_DEBUG_H_
#ifdef SK_REF_CNT_EXT_RELEASE_H_
#error Only one SkRefCnt should be used.
#endif
#include <atomic>
class SkRefCnt;
namespace WTF {
void adopted(const SkRefCnt*);
void requireAdoption(const SkRefCnt*);
}
// Alternate implementation of SkRefCnt for Chromium debug builds
class SK_API SkRefCnt : public SkRefCntBase {
public:
SkRefCnt();
~SkRefCnt() override;
void ref() const { SkASSERT(flags_.load() != AdoptionRequired_Flag); SkRefCntBase::ref(); }
void deref() const { SkRefCntBase::unref(); }
private:
void adopted() const { flags_ |= Adopted_Flag; }
void requireAdoption() const { flags_ |= AdoptionRequired_Flag; }
enum {
Adopted_Flag = 0x1,
AdoptionRequired_Flag = 0x2,
};
mutable std::atomic<int> flags_;
friend void WTF::adopted(const SkRefCnt*);
friend void WTF::requireAdoption(const SkRefCnt*);
};
inline SkRefCnt::SkRefCnt() : flags_(0) { }
inline SkRefCnt::~SkRefCnt() { }
// Bootstrap for Blink's WTF::RefPtr
namespace WTF {
inline void adopted(const SkRefCnt* object) {
if (!object)
return;
object->adopted();
}
inline void requireAdoption(const SkRefCnt* object) {
if (!object)
return;
object->requireAdoption();
}
} // namespace WTF
using WTF::adopted;
using WTF::requireAdoption;
#endif
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