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139 lines
4.4 KiB
139 lines
4.4 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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#include <Python.h> |
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namespace google { |
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namespace protobuf { |
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namespace python { |
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// Version constant. |
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// This is either 0 for python, 1 for CPP V1, 2 for CPP V2. |
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// |
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// 0 is default and is equivalent to |
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// PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python |
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// |
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// 1 is set with -DPYTHON_PROTO2_CPP_IMPL_V1 and is equivalent to |
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// PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=cpp |
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// and |
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// PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION_VERSION=1 |
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// |
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// 2 is set with -DPYTHON_PROTO2_CPP_IMPL_V2 and is equivalent to |
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// PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=cpp |
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// and |
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// PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION_VERSION=2 |
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#ifdef PYTHON_PROTO2_CPP_IMPL_V1 |
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#if PY_MAJOR_VERSION >= 3 |
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#error "PYTHON_PROTO2_CPP_IMPL_V1 is not supported under Python 3." |
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#endif |
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static int kImplVersion = 1; |
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#else |
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#ifdef PYTHON_PROTO2_CPP_IMPL_V2 |
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static int kImplVersion = 2; |
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#else |
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#ifdef PYTHON_PROTO2_PYTHON_IMPL |
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static int kImplVersion = 0; |
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#else |
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// The defaults are set here. Python 3 uses the fast C++ APIv2 by default. |
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// Python 2 still uses the Python version by default until some compatibility |
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// issues can be worked around. |
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#if PY_MAJOR_VERSION >= 3 |
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static int kImplVersion = 2; |
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#else |
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static int kImplVersion = 0; |
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#endif |
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#endif // PYTHON_PROTO2_PYTHON_IMPL |
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#endif // PYTHON_PROTO2_CPP_IMPL_V2 |
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#endif // PYTHON_PROTO2_CPP_IMPL_V1 |
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static const char* kImplVersionName = "api_version"; |
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static const char* kModuleName = "_api_implementation"; |
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static const char kModuleDocstring[] = |
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"_api_implementation is a module that exposes compile-time constants that\n" |
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"determine the default API implementation to use for Python proto2.\n" |
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"\n" |
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"It complements api_implementation.py by setting defaults using compile-time\n" |
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"constants defined in C, such that one can set defaults at compilation\n" |
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"(e.g. with blaze flag --copt=-DPYTHON_PROTO2_CPP_IMPL_V2)."; |
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#if PY_MAJOR_VERSION >= 3 |
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static struct PyModuleDef _module = { |
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PyModuleDef_HEAD_INIT, |
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kModuleName, |
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kModuleDocstring, |
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-1, |
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NULL, |
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NULL, |
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NULL, |
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NULL, |
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NULL |
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}; |
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#define INITFUNC PyInit__api_implementation |
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#define INITFUNC_ERRORVAL NULL |
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#else |
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#define INITFUNC init_api_implementation |
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#define INITFUNC_ERRORVAL |
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#endif |
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extern "C" { |
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PyMODINIT_FUNC INITFUNC() { |
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#if PY_MAJOR_VERSION >= 3 |
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PyObject *module = PyModule_Create(&_module); |
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#else |
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PyObject *module = Py_InitModule3( |
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const_cast<char*>(kModuleName), |
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NULL, |
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const_cast<char*>(kModuleDocstring)); |
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#endif |
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if (module == NULL) { |
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return INITFUNC_ERRORVAL; |
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} |
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// Adds the module variable "api_version". |
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if (PyModule_AddIntConstant( |
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module, |
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const_cast<char*>(kImplVersionName), |
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kImplVersion)) |
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#if PY_MAJOR_VERSION < 3 |
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return; |
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#else |
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{ Py_DECREF(module); return NULL; } |
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return module; |
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#endif |
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} |
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} |
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} // namespace python |
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} // namespace protobuf |
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} // namespace google
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