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  • Committer: Bazaar Package Importer
  • Author(s): Matthias Klose
  • Date: 2010-03-11 13:30:19 UTC
  • mto: (10.1.13 sid)
  • mto: This revision was merged to the branch mainline in revision 44.
  • Revision ID: james.westby@ubuntu.com-20100311133019-sblbooa3uqrkoe70
Tags: upstream-2.6.5~rc2
Import upstream version 2.6.5~rc2

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Doc/extending/extending.rst
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The compilation of an extension module depends on its intended use as well as on
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your system setup; details are given in later chapters.
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Do note that if your use case is calling C library functions or system calls,
 
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you should consider using the :mod:`ctypes` module rather than writing custom
 
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C code. Not only does :mod:`ctypes` let you write Python code to interface
 
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with C code, but it is more portable between implementations of Python than
 
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writing and compiling an extension module which typically ties you to CPython.
 
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.. _extending-simpleexample:
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   static int
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   import_spam(void)
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   {
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       PyObject *module = PyImport_ImportModule("spam");
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       if (module != NULL) {
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           PyObject *c_api_object = PyObject_GetAttrString(module, "_C_API");
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           if (c_api_object == NULL)
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               return -1;
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           if (PyCObject_Check(c_api_object))
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               PySpam_API = (void **)PyCObject_AsVoidPtr(c_api_object);
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           Py_DECREF(c_api_object);
 
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       PyObject *c_api_object;
 
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       PyObject *module;
 
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       module = PyImport_ImportModule("spam");
 
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       if (module == NULL)
 
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           return -1;
 
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       c_api_object = PyObject_GetAttrString(module, "_C_API");
 
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       if (c_api_object == NULL) {
 
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           Py_DECREF(module);
 
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           return -1;
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       }
 
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       if (PyCObject_Check(c_api_object))
 
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           PySpam_API = (void **)PyCObject_AsVoidPtr(c_api_object);
 
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       Py_DECREF(c_api_object);
 
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       Py_DECREF(module);
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       return 0;
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   }
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