230 // A simple preallocated buffer used to "feed" someone.

   231 // Mimicks chunk retirement leftover blocks.

   232 class FeederBuffer {

   233 

   234   MetaWord* _buf;

   235   const size_t _size;

   236   size_t _used;

   237 

   238 public:

   239 

   240   FeederBuffer(size_t size) : _buf(NULL), _size(size), _used(0) {

   241     _buf = NEW_C_HEAP_ARRAY(MetaWord, _size, mtInternal);

   242   }

   243 

   244   ~FeederBuffer() {

   245     FREE_C_HEAP_ARRAY(MetaWord, _buf);

   246   }

   247 

   248   MetaWord* get(size_t word_size) {

   249     if (_used > (_size - word_size)) {

   250       return NULL;

   251     }

   252     MetaWord* p = _buf + _used;

   253     _used += word_size;

   254     return p;

   255   }

   256 

   257 };