Recently we had a discussion about how to use NumPy arrays from extension modules with multiple source files, on various platforms. The modified header files that are attached to this message provide a (hopefully!) general solution. In fact, I propose to make them part of the official distribution, unless there are objections. If used like before, these header files give exactly the same result as the ones in NumPy 20.0.0. However, they permit to define the name of the C API pointer array and make it globally visible. Under the condition that the chosen name is unique, this should not create problems under any platform, no matter if static or dynamic linking is used. To use NumPy features in multiple source file extension modules, you have to write #define PY_ARRAY_UNIQUE_SYMBOL PyArrayXXX #include "Numeric/arrayobject.h" in the main source file (the one that contains the init function) and #define PY_ARRAY_UNIQUE_SYMBOL PyArrayXXX #define NO_IMPORT_ARRAY #include "Numeric/arrayobject.h" in all the others. The symbol you choose instead of PyArrayXXX should contain both the name of the imported module (array) and the name of the importing module (whatever your module is called) in order to be unique with a reasonably high probability. The same applies to the Ufunc module, just replace "array" by "ufunc" in the example. I have also applied the "static" correction to the Ufunc header file, there is no reason not to do it. Konrad. -- ------------------------------------------------------------------------------- Konrad Hinsen | E-Mail: hinsen@cnrs-orleans.fr Centre de Biophysique Moleculaire (CNRS) | Tel.: +33-2.38.25.56.24 Rue Charles Sadron | Fax: +33-2.38.63.15.17 45071 Orleans Cedex 2 | Deutsch/Esperanto/English/ France | Nederlands/Francais -------------------------------------------------------------------------------
I have added these files to CVS. Thanks! --Paul -----Original Message----- From: numpy-discussion-admin@lists.sourceforge.net [mailto:numpy-discussion-admin@lists.sourceforge.net]On Behalf Of Konrad Hinsen Sent: Wednesday, May 09, 2001 9:12 AM To: numpy-discussion@lists.sourceforge.net Subject: [Numpy-discussion] Modified header files Recently we had a discussion about how to use NumPy arrays from extension modules with multiple source files, on various platforms. The modified header files that are attached to this message provide a (hopefully!) general solution. In fact, I propose to make them part of the official distribution, unless there are objections. If used like before, these header files give exactly the same result as the ones in NumPy 20.0.0. However, they permit to define the name of the C API pointer array and make it globally visible. Under the condition that the chosen name is unique, this should not create problems under any platform, no matter if static or dynamic linking is used. To use NumPy features in multiple source file extension modules, you have to write #define PY_ARRAY_UNIQUE_SYMBOL PyArrayXXX #include "Numeric/arrayobject.h" in the main source file (the one that contains the init function) and #define PY_ARRAY_UNIQUE_SYMBOL PyArrayXXX #define NO_IMPORT_ARRAY #include "Numeric/arrayobject.h" in all the others. The symbol you choose instead of PyArrayXXX should contain both the name of the imported module (array) and the name of the importing module (whatever your module is called) in order to be unique with a reasonably high probability. The same applies to the Ufunc module, just replace "array" by "ufunc" in the example. I have also applied the "static" correction to the Ufunc header file, there is no reason not to do it. Konrad. -- ---------------------------------------------------------------------------- --- Konrad Hinsen | E-Mail: hinsen@cnrs-orleans.fr Centre de Biophysique Moleculaire (CNRS) | Tel.: +33-2.38.25.56.24 Rue Charles Sadron | Fax: +33-2.38.63.15.17 45071 Orleans Cedex 2 | Deutsch/Esperanto/English/ France | Nederlands/Francais ---------------------------------------------------------------------------- ---
I have added these files to CVS. Thanks! --Paul -----Original Message----- From: numpy-discussion-admin@lists.sourceforge.net [mailto:numpy-discussion-admin@lists.sourceforge.net]On Behalf Of Konrad Hinsen Sent: Wednesday, May 09, 2001 9:12 AM To: numpy-discussion@lists.sourceforge.net Subject: [Numpy-discussion] Modified header files Recently we had a discussion about how to use NumPy arrays from extension modules with multiple source files, on various platforms. The modified header files that are attached to this message provide a (hopefully!) general solution. In fact, I propose to make them part of the official distribution, unless there are objections. If used like before, these header files give exactly the same result as the ones in NumPy 20.0.0. However, they permit to define the name of the C API pointer array and make it globally visible. Under the condition that the chosen name is unique, this should not create problems under any platform, no matter if static or dynamic linking is used. To use NumPy features in multiple source file extension modules, you have to write #define PY_ARRAY_UNIQUE_SYMBOL PyArrayXXX #include "Numeric/arrayobject.h" in the main source file (the one that contains the init function) and #define PY_ARRAY_UNIQUE_SYMBOL PyArrayXXX #define NO_IMPORT_ARRAY #include "Numeric/arrayobject.h" in all the others. The symbol you choose instead of PyArrayXXX should contain both the name of the imported module (array) and the name of the importing module (whatever your module is called) in order to be unique with a reasonably high probability. The same applies to the Ufunc module, just replace "array" by "ufunc" in the example. I have also applied the "static" correction to the Ufunc header file, there is no reason not to do it. Konrad. -- ---------------------------------------------------------------------------- --- Konrad Hinsen | E-Mail: hinsen@cnrs-orleans.fr Centre de Biophysique Moleculaire (CNRS) | Tel.: +33-2.38.25.56.24 Rue Charles Sadron | Fax: +33-2.38.63.15.17 45071 Orleans Cedex 2 | Deutsch/Esperanto/English/ France | Nederlands/Francais ---------------------------------------------------------------------------- ---
participants (2)
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Konrad Hinsen -
Paul F. Dubois