34 using SharedData = struct SharedData {  typedef
35     SharedData(int refCount, int size)
39     static SharedData* Allocate(int size);
45     static char* ToString(SharedData* header)
50     static SharedData* GetHeader(const void* handle)
52         return reinterpret_cast<SharedData*>(const_cast<void*>(handle)) - 1;
59 SharedData* SharedData::Allocate(int size)  in Allocate()
70     SharedData* handle = reinterpret_cast<SharedData*>(malloc(sizeof(SharedData) + size + 1));  in Allocate()
76     new (handle)SharedData(1, size);  in Allocate()
80 void SharedData::AddRef(const void* handle)  in AddRef()
86     SharedData* data = GetHeader(handle);  in AddRef()
93 void SharedData::Release(const void* handle)  in Release()
99     SharedData* data = GetHeader(handle);  in Release()
114         string_ = SharedData::ToString(SharedData::Allocate(strlen(string)));  in String()
127         SharedData* sharedData = SharedData::Allocate(length);  in String()
131         string_ = SharedData::ToString(sharedData);  in String()
147     SharedData::AddRef(string_);  in String()
158     string_ = SharedData::ToString(SharedData::Allocate(size));  in String()
166     SharedData::Release(string_);  in ~String()
175     return SharedData::GetHeader(string_)->shareDataSize;  in GetLength()
576     SharedData::Release(string_);
583     string_ = SharedData::ToString(SharedData::Allocate(strlen(string)));
599     SharedData::Release(string_);  in operator =()
600     SharedData::AddRef(other.string_);  in operator =()
607     SharedData::Release(string_);  in operator =()