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Diffstat (limited to 'third_party/protobuf/3.0.0/python/google/protobuf/pyext/scoped_pyobject_ptr.h')
-rw-r--r-- | third_party/protobuf/3.0.0/python/google/protobuf/pyext/scoped_pyobject_ptr.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/third_party/protobuf/3.0.0/python/google/protobuf/pyext/scoped_pyobject_ptr.h b/third_party/protobuf/3.0.0/python/google/protobuf/pyext/scoped_pyobject_ptr.h new file mode 100644 index 0000000000..a128cd4c61 --- /dev/null +++ b/third_party/protobuf/3.0.0/python/google/protobuf/pyext/scoped_pyobject_ptr.h @@ -0,0 +1,96 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * 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. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "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 THE COPYRIGHT +// OWNER OR CONTRIBUTORS 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. + +// Author: tibell@google.com (Johan Tibell) + +#ifndef GOOGLE_PROTOBUF_PYTHON_CPP_SCOPED_PYOBJECT_PTR_H__ +#define GOOGLE_PROTOBUF_PYTHON_CPP_SCOPED_PYOBJECT_PTR_H__ + +#include <google/protobuf/stubs/common.h> + +#include <Python.h> + +namespace google { +class ScopedPyObjectPtr { + public: + // Constructor. Defaults to initializing with NULL. + // There is no way to create an uninitialized ScopedPyObjectPtr. + explicit ScopedPyObjectPtr(PyObject* p = NULL) : ptr_(p) { } + + // Destructor. If there is a PyObject object, delete it. + ~ScopedPyObjectPtr() { + Py_XDECREF(ptr_); + } + + // Reset. Deletes the current owned object, if any. + // Then takes ownership of a new object, if given. + // This function must be called with a reference that you own. + // this->reset(this->get()) is wrong! + // this->reset(this->release()) is OK. + PyObject* reset(PyObject* p = NULL) { + Py_XDECREF(ptr_); + ptr_ = p; + return ptr_; + } + + // Releases ownership of the object. + // The caller now owns the returned reference. + PyObject* release() { + PyObject* p = ptr_; + ptr_ = NULL; + return p; + } + + PyObject* operator->() const { + assert(ptr_ != NULL); + return ptr_; + } + + PyObject* get() const { return ptr_; } + + Py_ssize_t refcnt() const { return Py_REFCNT(ptr_); } + + void inc() const { Py_INCREF(ptr_); } + + // Comparison operators. + // These return whether a ScopedPyObjectPtr and a raw pointer + // refer to the same object, not just to two different but equal + // objects. + bool operator==(const PyObject* p) const { return ptr_ == p; } + bool operator!=(const PyObject* p) const { return ptr_ != p; } + + private: + PyObject* ptr_; + + GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ScopedPyObjectPtr); +}; + +} // namespace google +#endif // GOOGLE_PROTOBUF_PYTHON_CPP_SCOPED_PYOBJECT_PTR_H__ |