1
2//
3// This source file is part of appleseed.
4// Visit http://appleseedhq.net/ for additional information and resources.
5//
6// This software is released under the MIT license.
7//
8// Copyright (c) 2012-2013 Esteban Tovagliari, Jupiter Jazz Limited
9// Copyright (c) 2014-2017 Esteban Tovagliari, The appleseedhq Organization
10//
11// Permission is hereby granted, free of charge, to any person obtaining a copy
12// of this software and associated documentation files (the "Software"), to deal
13// in the Software without restriction, including without limitation the rights
14// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15// copies of the Software, and to permit persons to whom the Software is
16// furnished to do so, subject to the following conditions:
17//
18// The above copyright notice and this permission notice shall be included in
19// all copies or substantial portions of the Software.
20//
21// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
26// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27// THE SOFTWARE.
28//
29
30#ifndef APPLESEED_PYTHON_GILLOCKS_H
31#define APPLESEED_PYTHON_GILLOCKS_H
32
33// appleseed.python headers.
34#include "pyseed.h" // has to be first, to avoid redefinition warnings
35
36// appleseed.foundation headers.
37#include "foundation/core/concepts/noncopyable.h"
38
39// This class locks Python's Global interpreter lock on construction
40// and unlocks it on destruction. A classic lock.
41class ScopedGILLock
42 : public foundation::NonCopyable
43{
44 public:
45 ScopedGILLock();
46 ~ScopedGILLock();
47
48 private:
49 bool m_threads_initialized;
50 PyGILState_STATE m_state;
51};
52
53// This class unlocks Python's Global interpreter lock on construction
54// and locks it on destruction. An inverted lock -> unlock.
55class ScopedGILUnlock
56 : public foundation::NonCopyable
57{
58 public:
59 ScopedGILUnlock();
60 ~ScopedGILUnlock();
61
62 private:
63 bool m_threads_initialized;
64 PyThreadState* m_state;
65};
66
67#endif // !APPLESEED_PYTHON_GILLOCKS_H
68