43     DirtyStack* prev;  member
51     mHead->prev = mHead;  in DamageAccumulator()
56     if (currentFrame->prev != currentFrame) {  in computeTransformImpl()
57         computeTransformImpl(currentFrame->prev, outMatrix);  in computeTransformImpl()
84         nextFrame->prev = mHead;  in pushCommon()
104     LOG_ALWAYS_FATAL_IF(mHead->prev == mHead, "Cannot pop the root frame!");  in popTransform()
106     mHead = mHead->prev;  in popTransform()
159     while (frame->prev != frame) {  in findParentRenderNode()
160         frame = frame->prev;  in findParentRenderNode()
170         while (frame->prev != frame) {  in findProjectionReceiver()
171             frame = frame->prev;  in findProjectionReceiver()
188         frame = frame->prev;  in applyTransforms()
236     LOG_ALWAYS_FATAL_IF(mHead->prev != mHead, "Cannot finish, mismatched push/pop calls! %p vs. %p",  in finish()
237                         mHead->prev, mHead);  in finish()