/*
* PythonThreadGuard
*
* Copyright (c) 1997-2008, Perforce Software, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTR
* IBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PERFORCE SOFTWARE, INC. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: //depot/r10.2/p4-python/PythonThreadGuard.h#1 $
*
* Build instructions:
* Use Distutils - see accompanying setup.py
*
* python setup.py install
*
*/
#ifndef PYTHON_THREAD_GUARD_H
#define PYTHON_THREAD_GUARD_H
// Guard class that releases the lock in the constructor and
// re-acquires it again in the destructor
class ReleasePythonLock
{
PyThreadState *save;
public:
ReleasePythonLock() {
save = PyEval_SaveThread();
}
~ReleasePythonLock() {
PyEval_RestoreThread(save);
}
};
// Guard class that ensures the correct state of the GIL
// the Global Interpreter Lock of Python
class EnsurePythonLock
{
PyGILState_STATE gstate;
public:
EnsurePythonLock() {
gstate = PyGILState_Ensure();
}
~EnsurePythonLock() {
PyGILState_Release(gstate);
}
};
#endif // PYTHON_THREAD_GUARD_H