25     char*   fBegin; // start of used section in this chunk  member
34         fBegin  = fEnd = NULL;  in init()
76     if (NULL == front->fBegin) {  in front()
82     SkASSERT(front->fBegin);  in front()
83     return front->fBegin;  in front()
115     if (NULL == first->fBegin) {  in push_front()
120         begin = first->fBegin - fElemSize;  in push_front()
134     first->fBegin = begin;  in push_front()
151     if (NULL == last->fBegin) {  in push_back()
153         last->fBegin = last->start();  in push_back()
154         end = last->fBegin + fElemSize;  in push_back()
182     if (first->fBegin == NULL) {  // we were marked empty from before  in pop_front()
190     char* begin = first->fBegin + fElemSize;  in pop_front()
194         first->fBegin = begin;  in pop_front()
196         first->fBegin = first->fEnd = NULL;  // mark as empty  in pop_front()
217     SkASSERT(end >= last->fBegin);  in pop_back()
219     if (end > last->fBegin) {  in pop_back()
222         last->fBegin = last->fEnd = NULL;    // mark as empty  in pop_back()
230     while (fHead != NULL && fHead->fBegin == NULL) {  in Iter()
233     fPos = fHead ? fHead->fBegin : NULL;  in Iter()
245             } while (fHead != NULL && fHead->fBegin == NULL);  in next()
246             next = fHead ? fHead->fBegin : NULL;  in next()