source/Utility/SharingPtr.cpp

//===---------------------SharingPtr.cpp ------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "lldb/Utility/SharingPtr.h"

namespace lldb_private {

namespace imp
{

    template <class T>
    inline T
    increment(T& t)
    {
        return __sync_add_and_fetch(&t, 1);
    }

    template <class T>
    inline T
    decrement(T& t)
    {
        return __sync_add_and_fetch(&t, -1);
    }

    shared_count::~shared_count()
    {
    }

    void
    shared_count::add_shared()
    {
        increment(shared_owners_);
    }

    void
    shared_count::release_shared()
    {
        if (decrement(shared_owners_) == -1)
        {
            on_zero_shared();
            delete this;
        }
    }

} // imp


} // namespace lldb