117 SkROBuffer::SkROBuffer(const SkBufferHead* head, size_t used) : fHead(head), fUsed(used) {  in SkROBuffer()
119         fHead->ref();  in SkROBuffer()
128     if (fHead) {  in ~SkROBuffer()
129         fHead->validate(fUsed);  in ~SkROBuffer()
130         fHead->unref();  in ~SkROBuffer()
140         fBlock = &buffer->fHead->fBlock;  in reset()
167 SkRWBuffer::SkRWBuffer(size_t initialCapacity) : fHead(nullptr), fTail(nullptr), fTotalUsed(0) {}  in SkRWBuffer()
171     if (fHead) {  in ~SkRWBuffer()
172         fHead->unref();  in ~SkRWBuffer()
184     if (nullptr == fHead) {  in append()
185         fHead = SkBufferHead::Alloc(length);  in append()
186         fTail = &fHead->fBlock;  in append()
212     if (nullptr == fHead) {  in append()
213         fHead = SkBufferHead::Alloc(length);  in append()
214         fTail = &fHead->fBlock;  in append()
228     if (fHead) {  in validate()
229         fHead->validate(fTotalUsed, fTail);  in validate()
237 SkROBuffer* SkRWBuffer::newRBufferSnapshot() const { return new SkROBuffer(fHead, fTotalUsed); }  in newRBufferSnapshot()