78     Block*  first = fFrontBlock;  in push_front()  local
81     if (NULL == first->fBegin) {  in push_front()
83         first->fEnd = first->fStop;  in push_front()
84         begin = first->fStop - fElemSize;  in push_front()
86         begin = first->fBegin - fElemSize;  in push_front()
87         if (begin < first->start()) {    // no more room in this chunk  in push_front()
89             first = this->allocateBlock(fAllocCount);  in push_front()
90             first->fNext = fFrontBlock;  in push_front()
91             fFrontBlock->fPrev = first;  in push_front()
92             fFrontBlock = first;  in push_front()
97     first->fBegin = begin;  in push_front()
155     Block*  first = fFrontBlock;  in pop_front()  local
157     SkASSERT(first != NULL);  in pop_front()
159     if (first->fBegin == NULL) {  // we were marked empty from before  in pop_front()
160         first = first->fNext;  in pop_front()
161         first->fPrev = NULL;  in pop_front()
163         fFrontBlock = first;  in pop_front()
164         SkASSERT(first != NULL);    // else we popped too far  in pop_front()
167     char* begin = first->fBegin + fElemSize;  in pop_front()
168     SkASSERT(begin <= first->fEnd);  in pop_front()
171         first->fBegin = begin;  in pop_front()
172         SkASSERT(NULL != first->fBegin);  in pop_front()
173         fFront = first->fBegin;  in pop_front()
175         first->fBegin = first->fEnd = NULL;  // mark as empty  in pop_front()
176         if (NULL == first->fNext) {  in pop_front()
179             SkASSERT(NULL != first->fNext->fBegin);  in pop_front()
180             fFront = first->fNext->fBegin;  in pop_front()