LockableReference.hpp

Go to the documentation of this file.

/*
 * Copyright (c) 2011-2019, The DART development contributors
 * All rights reserved.
 *
 * The list of contributors can be found at:
 *   https://github.com/dartsim/dart/blob/master/LICENSE
 *
 * This file is provided under the following "BSD-style" License:
 *   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.
 *   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 ARE
 *   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 *   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 *   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 *   AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 *   ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *   POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef DART_COMMON_LOCKABLEREFERENCE_HPP_
#define DART_COMMON_LOCKABLEREFERENCE_HPP_
 
#include <memory>
#include <vector>
 
namespace dart {
namespace common {
 
class LockableReference
{
public:
  constexpr LockableReference() noexcept = default;
 
  virtual ~LockableReference() = default;
 
  virtual void lock() = 0;
 
  virtual bool try_lock() noexcept = 0;
 
  virtual void unlock() noexcept = 0;
 
protected:
  LockableReference(const LockableReference&) = delete;
};
 
template <typename LockableT>
class SingleLockableReference final : public LockableReference
{
public:
  using Lockable = LockableT;
 
  SingleLockableReference(
      std::weak_ptr<const void> lockableHolder, Lockable& lockable) noexcept;
 
  // Documentation inherited
  void lock() override;
 
  // Documentation inherited
  bool try_lock() noexcept override;
 
  // Documentation inherited
  void unlock() noexcept override;
 
private:
  std::weak_ptr<const void> mLockableHolder;
 
  Lockable& mLockable;
};
 
template <typename LockableT>
class MultiLockableReference final : public LockableReference
{
public:
  using Lockable = LockableT;
 
  template <typename InputIterator>
  MultiLockableReference(
      std::weak_ptr<const void> lockableHolder,
      InputIterator first,
      InputIterator last);
 
  // Documentation inherited
  void lock() override;
 
  // Documentation inherited
  bool try_lock() noexcept override;
 
  // Documentation inherited
  void unlock() noexcept override;
 
private:
  template <typename T>
  T* ptr(T& obj);
 
  template <typename T>
  T* ptr(T* obj);
 
  std::weak_ptr<const void> mLockableHolder;
 
  std::vector<Lockable*> mLockables;
};
 
} // namespace common
} // namespace dart
 
#include "dart/common/detail/LockableReference-impl.hpp"
 
#endif // DART_COMMON_LOCKABLEREFERENCE_HPP_