/******************************************************************************
 * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the NVIDIA CORPORATION nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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/******************************************************************************
 *
 * Code and text by Sean Baxter, NVIDIA Research
 * See http://nvlabs.github.io/moderngpu for repository and documentation.
 *
 ******************************************************************************/

#pragma once

#include "static.h"

namespace mgpu {

extern int Rand(int min, int max);
extern int64 Rand(int64 min, int64 max);
extern uint Rand(uint min, uint max);
extern uint64 Rand(uint64 min, uint64 max);
extern float Rand(float min, float max);
extern double Rand(double min, double max);

////////////////////////////////////////////////////////////////////////////////
// intrusive_ptr

// boost::noncopyable, moved here so we don't have dependency on boost
class noncopyable {
protected:
  noncopyable() {}
  ~noncopyable() {}

private:
  noncopyable(const noncopyable&) {}
  const noncopyable& operator=(const noncopyable&) { return *this; }
};

class CudaBase : public noncopyable {
public:
  CudaBase() : _ref(0) {}
  virtual ~CudaBase() {}
  virtual long AddRef() {
    //	return BOOST_INTERLOCKED_INCREMENT(&_ref);
    return ++_ref;
  }
  virtual void Release() {
    //	if(!BOOST_INTERLOCKED_DECREMENT(&_ref)) delete this;
    if (!--_ref)
      delete this;
  }

private:
  long _ref;
};

inline long intrusive_ptr_add_ref(CudaBase* base) { return base->AddRef(); }

inline void intrusive_ptr_release(CudaBase* base) { base->Release(); }

template <typename T>
class intrusive_ptr {
public:
  intrusive_ptr() : _p(0) {}
  explicit intrusive_ptr(T* p) : _p(p) {
    if (p)
      intrusive_ptr_add_ref(p);
  }
  intrusive_ptr(const intrusive_ptr<T>& rhs) : _p(rhs._p) {
    if (_p)
      intrusive_ptr_add_ref(_p);
  }
  ~intrusive_ptr() {
    if (_p)
      intrusive_ptr_release(_p);
  }
  intrusive_ptr& operator=(const intrusive_ptr& rhs) {
    intrusive_ptr(rhs.get()).swap(*this);
    return *this;
  }

  void reset(T* p = 0) { intrusive_ptr(p).swap(*this); }
  T* release() {
    T* p = _p;
    _p   = 0;
    return p;
  }

  T* get() const { return _p; }
  operator T*() const { return _p; }
  T* operator->() const { return _p; }

  void swap(intrusive_ptr& rhs) { std::swap(_p, rhs._p); }

private:
  T* _p;
};

} // namespace mgpu
