1 files changed, 64 insertions, 0 deletions
diff --git a/xbmc/interfaces/python/pythreadstate.h b/xbmc/interfaces/python/pythreadstate.h
new file mode 100644
index 0000000..2cae5a7
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+++ b/xbmc/interfaces/python/pythreadstate.h
@@ -0,0 +1,64 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+
+//WARNING: since this will unlock/lock the python global interpreter lock,
+//         it will not work recursively
+
+//this is basically a scoped version of a Py_BEGIN_ALLOW_THREADS .. Py_END_ALLOW_THREADS block
+class CPyThreadState
+{
+  public:
+    explicit CPyThreadState(bool save = true)
+    {
+      m_threadState = NULL;
+
+      if (save)
+        Save();
+    }
+
+    ~CPyThreadState()
+    {
+      Restore();
+    }
+
+    void Save()
+    {
+      if (!m_threadState)
+        m_threadState = PyEval_SaveThread(); //same as Py_BEGIN_ALLOW_THREADS
+    }
+
+    void Restore()
+    {
+      if (m_threadState)
+      {
+        PyEval_RestoreThread(m_threadState); //same as Py_END_ALLOW_THREADS
+        m_threadState = NULL;
+      }
+    }
+
+  private:
+    PyThreadState* m_threadState;
+};
+
+/**
+ * A std::unique_lock<CCriticalSection> that will relinquish the GIL during the time
+ *  it takes to obtain the CriticalSection
+ */
+class GilSafeSingleLock : public CPyThreadState, public std::unique_lock<CCriticalSection>
+{
+public:
+  explicit GilSafeSingleLock(CCriticalSection& critSec)
+    : CPyThreadState(true), std::unique_lock<CCriticalSection>(critSec)
+  {
+    CPyThreadState::Restore();
+  }
+};
+