include/jitcs_adt_refcounter.h

   1 //===-- jitcs_adt_refcounter.h - pointer helper type ------------*- C++ -*-===//
   2 //
   3 //
   4 //===----------------------------------------------------------------------===//
   5
   6 #ifndef _JITCS_ADT_REFCOUNTER_H_
   7 #define _JITCS_ADT_REFCOUNTER_H_
   8
   9 #include <assert.h>
  10
  11 namespace jitcs {
  12 // Ref represents a nonnull pointer to some object.
  13 template <typename T> struct RefCounter {
  14   T* _ptr;
  15
  16   RefCounter() = delete;
  17   RefCounter& operator =(const RefCounter&) = delete;
  18   RefCounter(const RefCounter& r) { _ptr = r._ptr; _ptr->_incRef(); }
  19   RefCounter(T* d) { assert(d != nullptr); _ptr = d; _ptr->_incRef(); }
  20   ~RefCounter() { _ptr->_decRef(); }
  21
  22   T* operator ->() { return _ptr; }
  23   T& operator *() { return *_ptr; }
  24 };
  25 }
  26
  27 #endif
  28 // _JITCS_ADT_REFCOUNTER_H_