479     : fHead(other.fHead)  in SkDynamicMemoryWStream()
483     other.fHead = nullptr;  in SkDynamicMemoryWStream()
501     Block* block = fHead;  in reset()
507     fHead = fTail = nullptr;  in reset()
549             fHead = fTail = block;  in write()
567     dst->fTail->fNext = fHead;  in writeToAndReset()
570     fHead = fTail = nullptr;  in writeToAndReset()
585     fTail->fNext = dst->fHead;  in prependToAndReset()
586     dst->fHead = fHead;  in prependToAndReset()
588     fHead = fTail = nullptr;  in prependToAndReset()
598     Block* block = fHead;  in read()
618     Block* block = fHead;  in copyTo()
629     for (Block* block = fHead; block != nullptr; block = block->fNext) {  in writeToStream()
661     Block* block = fHead;  in copyToAndReset()
670     fHead = fTail = nullptr;  in copyToAndReset()
679     for (Block* block = fHead; block != nullptr; ) {  in writeToAndReset()
687     fHead = fTail = nullptr;  in writeToAndReset()
704     if (!fHead) {  in validate()
712     const Block* block = fHead;  in validate()
727     explicit SkBlockMemoryRefCnt(SkDynamicMemoryWStream::Block* head) : fHead(head) { }  in SkBlockMemoryRefCnt()
730         SkDynamicMemoryWStream::Block* block = fHead;  in ~SkBlockMemoryRefCnt()
738     SkDynamicMemoryWStream::Block* const fHead;  member in SkBlockMemoryRefCnt
744         : fBlockMemory(std::move(headRef)), fCurrent(fBlockMemory->fHead)  in SkBlockMemoryStream()
799         fCurrent = fBlockMemory->fHead;  in rewind()
847         if (fBlockMemory->fHead && !fBlockMemory->fHead->fNext) {  in getMemoryBase()
848             return fBlockMemory->fHead->start();  in getMemoryBase()
862     if (nullptr == fHead) {  in detachAsStream()
866     if (fHead == fTail) {  // one block, may be worth shrinking.  in detachAsStream()
868         fHead = fTail = (SkDynamicMemoryWStream::Block*)sk_realloc_throw(fTail, SkToSizeT(used));  in detachAsStream()
874             = std::make_unique<SkBlockMemoryStream>(sk_make_sp<SkBlockMemoryRefCnt>(fHead),  in detachAsStream()
876     fHead = nullptr;    // signal reset() to not free anything  in detachAsStream()