LockableReference.hpp

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#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_