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// file : cult/mm/counter.hxx
// author : Boris Kolpackov <boris@kolpackov.net>
// copyright : Copyright (c) 2005-2010 Boris Kolpackov
// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
#ifndef CULT_MM_COUNTER_HXX
#define CULT_MM_COUNTER_HXX
#ifdef CULT_THREADS
// Multi-threaded version is architecture-specific.
//
#include <cult/mm/arch/counter.hxx>
#else
// Single-threaded version.
//
#include <cult/types/fundamental.hxx>
namespace Cult
{
namespace MM
{
class Counter: public NonCopyable
{
public:
Counter ();
// After failure assume the counter has its old value.
//
Void
inc_ref ();
// After failure assume the counter has its new value.
//
Boolean
dec_ref ();
Size
count () const;
private:
Size value_;
};
}
}
#include <cult/mm/counter.ixx>
#endif // CULT_THREADS
#include <cult/mm/new.hxx>
#include <cult/mm/static-ptr.hxx>
namespace Cult
{
namespace MM
{
extern StaticPtr<Key<Counter> > counted;
// Non-member inc_ref. Especially useful for messing with `this'.
//
template <typename X>
X*
inc_ref (X* p)
{
locate (p, *counted)->inc_ref ();
return p;
}
}
}
#endif // CULT_MM_COUNTER_HXX
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