[Python-Dev] microsoft dlls apparently don't support data. implications: PyAPI functions required to access data across modules. (original) (raw)

Luke Kenneth Casson Leighton lkcl at lkcl.net
Sun Jan 25 17:15:28 CET 2009

On Sun, Jan 25, 2009 at 3:58 PM, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:

according to the wikipedia entry on dlls, dlls do not support data, only functions. which would explain two things: 1) why certain modules are forcibly linked into pythonNN.dll 2) why attempts to move them out of pythonNN.dll cause runtime crashes. so i will continue the experiment, and remove all the "data" references from the pythonNN.def that i added, and deal with the knock-on consequences, which will involve adding "get" functions.

for example, PyAPIFUNC(char*) PyStructSequenceGetUnnamedField(void) use of such functions will allow various bits and pieces - such as PyStructSequenceUnnamedField - to be converted back to static in their respective c files. any objections, speak now, because this will involve quite a bit of work.

here is a starting list of data items which will require "getter" functions, found just by creating a posixmodule.pyd:

Info: resolving __Py_NoneStruct by linking to __imp___Py_NoneStruct (auto-import) Info: resolving _Py_FileSystemDefaultEncoding by linking to __imp__Py_FileSystemDefaultEncoding (auto-import) Info: resolving _PyExc_OSError by linking to __imp__PyExc_OSError (auto-import) Info: resolving _PyUnicode_Type by linking to __imp__PyUnicode_Type (auto-import) Info: resolving _PyFloat_Type by linking to __imp__PyFloat_Type (auto-import) Info: resolving _PyExc_TypeError by linking to __imp__PyExc_TypeError (auto-impoModules/posixmodule.ort) Info: resolving _PyExc_RuntimeError by linking to __imp__PyExc_RuntimeError (auto-import) Info: resolving _PyExc_ValueError by linking to __imp__PyExc_ValueError (auto-import) Info: resolving _PyExc_RuntimeWarning by linking to __imp__PyExc_RuntimeWarning (auto-import) Info: resolving _PyExc_NotImplementedError by linking to __imp__PyExc_NotImplementedError (auto-import)

obviously, auto-import can't happen. so getter-functions it is.

l.

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