vm/data_roots.hpp

   1 namespace factor
   2 {
   3
   4 template<typename Type>
   5 struct data_root : public tagged<Type> {
   6         factor_vm *parent;
   7
   8         void push()
   9         {
  10                 parent->data_roots.push_back(data_root_range(&this->value_,1));
  11         }
  12
  13         explicit data_root(cell value_, factor_vm *parent_)
  14                 : tagged<Type>(value_), parent(parent_)
  15         {
  16                 push();
  17         }
  18
  19         explicit data_root(Type *value_, factor_vm *parent_) :
  20                 tagged<Type>(value_), parent(parent_)
  21         {
  22                 push();
  23         }
  24
  25         const data_root<Type>& operator=(const Type *x) { tagged<Type>::operator=(x); return *this; }
  26         const data_root<Type>& operator=(const cell &x) { tagged<Type>::operator=(x); return *this; }
  27
  28         ~data_root()
  29         {
  30                 parent->data_roots.pop_back();
  31         }
  32 };
  33
  34 /* A similar hack for the bignum implementation */
  35 struct gc_bignum {
  36         bignum **addr;
  37         factor_vm *parent;
  38
  39         gc_bignum(bignum **addr_, factor_vm *parent_) : addr(addr_), parent(parent_)
  40         {
  41                 if(*addr_) parent->check_data_pointer(*addr_);
  42                 parent->bignum_roots.push_back((cell)addr);
  43         }
  44
  45         ~gc_bignum()
  46         {
  47 #ifdef FACTOR_DEBUG
  48                 assert(parent->bignum_roots.back() == (cell)addr);
  49 #endif
  50                 parent->bignum_roots.pop_back();
  51         }
  52 };
  53
  54 #define GC_BIGNUM(x) gc_bignum x##__data_root(&x,this)
  55
  56 }