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95 lines
3.3 KiB
95 lines
3.3 KiB
// Protocol Buffers - Google's data interchange format |
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// Copyright 2008 Google Inc. All rights reserved. |
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// https://developers.google.com/protocol-buffers/ |
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// |
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// Redistribution and use in source and binary forms, with or without |
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// modification, are permitted provided that the following conditions are |
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// met: |
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// |
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// * Redistributions of source code must retain the above copyright |
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// notice, this list of conditions and the following disclaimer. |
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// * Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// * Neither the name of Google Inc. nor the names of its |
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// contributors may be used to endorse or promote products derived from |
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// this software without specific prior written permission. |
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// |
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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// Author: tibell@google.com (Johan Tibell) |
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#ifndef GOOGLE_PROTOBUF_PYTHON_CPP_SCOPED_PYOBJECT_PTR_H__ |
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#define GOOGLE_PROTOBUF_PYTHON_CPP_SCOPED_PYOBJECT_PTR_H__ |
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#include <Python.h> |
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namespace google { |
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class ScopedPyObjectPtr { |
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public: |
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// Constructor. Defaults to intializing with NULL. |
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// There is no way to create an uninitialized ScopedPyObjectPtr. |
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explicit ScopedPyObjectPtr(PyObject* p = NULL) : ptr_(p) { } |
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// Destructor. If there is a PyObject object, delete it. |
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~ScopedPyObjectPtr() { |
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Py_XDECREF(ptr_); |
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} |
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// Reset. Deletes the current owned object, if any. |
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// Then takes ownership of a new object, if given. |
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// this->reset(this->get()) works. |
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PyObject* reset(PyObject* p = NULL) { |
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if (p != ptr_) { |
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Py_XDECREF(ptr_); |
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ptr_ = p; |
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} |
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return ptr_; |
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} |
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// Releases ownership of the object. |
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PyObject* release() { |
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PyObject* p = ptr_; |
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ptr_ = NULL; |
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return p; |
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} |
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operator PyObject*() { return ptr_; } |
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PyObject* operator->() const { |
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assert(ptr_ != NULL); |
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return ptr_; |
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} |
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PyObject* get() const { return ptr_; } |
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Py_ssize_t refcnt() const { return Py_REFCNT(ptr_); } |
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void inc() const { Py_INCREF(ptr_); } |
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// Comparison operators. |
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// These return whether a ScopedPyObjectPtr and a raw pointer |
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// refer to the same object, not just to two different but equal |
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// objects. |
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bool operator==(const PyObject* p) const { return ptr_ == p; } |
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bool operator!=(const PyObject* p) const { return ptr_ != p; } |
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private: |
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PyObject* ptr_; |
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GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ScopedPyObjectPtr); |
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}; |
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} // namespace google |
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#endif // GOOGLE_PROTOBUF_PYTHON_CPP_SCOPED_PYOBJECT_PTR_H__
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