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//===-- Baton.h -------------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef lldb_Baton_h_
#define lldb_Baton_h_
#include "lldb/lldb-enumerations.h"
#include "lldb/lldb-public.h"
#include <memory>
namespace lldb_private {
class Stream;
}
namespace lldb_private {
//----------------------------------------------------------------------
/// @class Baton Baton.h "lldb/Core/Baton.h"
/// A class designed to wrap callback batons so they can cleanup
/// any acquired resources
///
/// This class is designed to be used by any objects that have a callback
/// function that takes a baton where the baton might need to
/// free/delete/close itself.
///
/// The default behavior is to not free anything. Subclasses can free any
/// needed resources in their destructors.
//----------------------------------------------------------------------
class Baton {
public:
Baton() {}
virtual ~Baton() {}
virtual void *data() = 0;
virtual void GetDescription(Stream *s,
lldb::DescriptionLevel level) const = 0;
};
class UntypedBaton : public Baton {
public:
UntypedBaton(void *Data) : m_data(Data) {}
virtual ~UntypedBaton() {
// The default destructor for an untyped baton does NOT attempt to clean up
// anything in m_data.
}
void *data() override { return m_data; }
void GetDescription(Stream *s, lldb::DescriptionLevel level) const override;
void *m_data; // Leave baton public for easy access
};
template <typename T> class TypedBaton : public Baton {
public:
explicit TypedBaton(std::unique_ptr<T> Item) : Item(std::move(Item)) {}
T *getItem() { return Item.get(); }
const T *getItem() const { return Item.get(); }
void *data() override { return Item.get(); }
virtual void GetDescription(Stream *s,
lldb::DescriptionLevel level) const override {}
protected:
std::unique_ptr<T> Item;
};
} // namespace lldb_private
#endif // lldb_Baton_h_
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