60   _first = _chunk = new (init_size) Chunk(init_size);  in Arena()
61   _hwm = _chunk->bottom();      // Save the cached hwm, max  in Arena()
62   _max = _chunk->top();  in Arena()
67   _first = _chunk = new (Chunk::init_size) Chunk(Chunk::init_size);  in Arena()
68   _hwm = _chunk->bottom();      // Save the cached hwm, max  in Arena()
69   _max = _chunk->top();  in Arena()
74 : _chunk(a->_chunk), _hwm(a->_hwm), _max(a->_max), _first(a->_first) {  in Arena()
81   size_t sum = _chunk->_len - (_max-_hwm); // Size leftover in this Chunk  in used()
83   while( k != _chunk) {         // Whilst have Chunks in a row  in used()
96   register Chunk *k = _chunk;   // Get filled-up chunk address  in grow()
97   _chunk = new (len) Chunk(len);  in grow()
99   if( k ) k->_next = _chunk;    // Append new chunk to end of linked list  in grow()
100   else _first = _chunk;  in grow()
101   _hwm  = _chunk->bottom();     // Save the cached hwm, max  in grow()
102   _max =  _chunk->top();  in grow()
147   _first = _chunk = NULL;       // Normal, new-arena initialization  in reset()
155   if( (void*)_chunk->bottom() <= ptr && ptr < (void*)_hwm )  in contains()