/**

* Copyright 2015 Google Inc. All Rights Reserved.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

#ifndef DEVTOOLS_CDBG_DEBUGLETS_PYTHON_PYTHON_CALLBACK_H_

#define DEVTOOLS_CDBG_DEBUGLETS_PYTHON_PYTHON_CALLBACK_H_

#include <functional>

#include "common.h"

#include "python_util.h"

namespace devtools {

namespace cdbg {

// Wraps std::function in a zero arguments Python callable.

class PythonCallback {

public:

PythonCallback() {}

// Creates a zero argument Python callable that will delegate to "callback"

// when invoked. The callback returns will always return None.

static ScopedPyObject Wrap(std::function<void()> callback);

// Disables any futher invocations of "callback_". The "method" is the

// return value of "Wrap".

static void Disable(PyObject* method);

static PyTypeObject python_type_;

private:

static PyObject* Run(PyObject* self);

private:

// Callback to invoke or nullptr if the callback was cancelled.

std::function<void()> callback_;

static PyMethodDef callback_method_def_;

DISALLOW_COPY_AND_ASSIGN(PythonCallback);

};

} // namespace cdbg

} // namespace devtools

#endif // DEVTOOLS_CDBG_DEBUGLETS_PYTHON_PYTHON_CALLBACK_H_