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authorTim Peters <tim.peters@gmail.com>2001-12-17 01:27:01 (GMT)
committerTim Peters <tim.peters@gmail.com>2001-12-17 01:27:01 (GMT)
commitdd5c05fe6d837b1fa7102963c3134a7da8c24340 (patch)
tree90bf63b056d24aaaebaf843619343fbf80dcf1d1 /Modules
parent2168e9d602cffbb6975a11353707a921455c05f7 (diff)
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David Abrahams tried to compile this as a separate DLL under MSVC, and
got a barrage of compile errors that didn't make sense to the C++ brain: MSVC does not allow C (but does allow C++) initializers to contain data addresses supplied by other DLLs. So changed the initializers here to use dummy nulls, and changed module init to plug in the foreign addresses at runtime (manually simulating what C++ does by magic). Tested on Windows, and Guido tested on Linux (thanks!). BTW, the *point* is that people are going to use this module as a template for writing their own subtypes, and it's unusual for extension authors to build their extensions into Python directly (separate DLLs are the norm on Windows); so it's better if we give them a template that works <wink>.
Diffstat (limited to 'Modules')
-rw-r--r--Modules/xxsubtype.c25
1 files changed, 21 insertions, 4 deletions
diff --git a/Modules/xxsubtype.c b/Modules/xxsubtype.c
index 58024d1..e4910c1 100644
--- a/Modules/xxsubtype.c
+++ b/Modules/xxsubtype.c
@@ -7,6 +7,15 @@ static char xxsubtype__doc__[] =
"If you don't care about the examples, and don't intend to run the Python\n"
"test suite, you can recompile Python without Modules/xxsubtype.c.";
+/* We link this module statically for convenience. If compiled as a shared
+ library instead, some compilers don't allow addresses of Python objects
+ defined in other libraries to be used in static initializers here. The
+ DEFERRED_ADDRESS macro is used to tag the slots where such addresses
+ appear; the module init function must fill in the tagged slots at runtime.
+ The argument is for documentation -- the macro ignores it.
+*/
+#define DEFERRED_ADDRESS(ADDR) 0
+
/* spamlist -- a list subtype */
typedef struct {
@@ -66,7 +75,7 @@ static PyGetSetDef spamlist_getsets[] = {
};
static PyTypeObject spamlist_type = {
- PyObject_HEAD_INIT(&PyType_Type)
+ PyObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type))
0,
"xxsubtype.spamlist",
sizeof(spamlistobject),
@@ -97,7 +106,7 @@ static PyTypeObject spamlist_type = {
spamlist_methods, /* tp_methods */
0, /* tp_members */
spamlist_getsets, /* tp_getset */
- &PyList_Type, /* tp_base */
+ DEFERRED_ADDRESS(&PyList_Type), /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
@@ -160,7 +169,7 @@ static PyMemberDef spamdict_members[] = {
};
static PyTypeObject spamdict_type = {
- PyObject_HEAD_INIT(&PyType_Type)
+ PyObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type))
0,
"xxsubtype.spamdict",
sizeof(spamdictobject),
@@ -191,7 +200,7 @@ static PyTypeObject spamdict_type = {
spamdict_methods, /* tp_methods */
spamdict_members, /* tp_members */
0, /* tp_getset */
- &PyDict_Type, /* tp_base */
+ DEFERRED_ADDRESS(&PyDict_Type), /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
@@ -231,6 +240,14 @@ initxxsubtype(void)
{
PyObject *m, *d;
+ /* Fill in the deferred data addresses. This must be done before
+ PyType_Ready() is called. */
+ spamdict_type.ob_type = &PyType_Type;
+ spamdict_type.tp_base = &PyDict_Type;
+
+ spamlist_type.ob_type = &PyType_Type;
+ spamlist_type.tp_base = &PyList_Type;
+
m = Py_InitModule3("xxsubtype",
xxsubtype_functions,
xxsubtype__doc__);