Mercurial > pub > dyncall > bindings
annotate python/pydc/pydcext.c @ 29:6cc2b7fc7ea2
bigger pydc update:
- cleanups and refactoring
- python 2 fixes in var conversions (especially w/ respect to int vs long)
- fix to pydc.free() which didn't work at all
- fix to return python bool as actual bool
- test lib covering all conversions (manual verification, though :-/)
| author | Tassilo Philipp |
|---|---|
| date | Wed, 08 Apr 2020 22:17:43 +0200 |
| parents | edbbd467f50a |
| children | baf087cf5971 |
| rev | line source |
|---|---|
| 0 | 1 /****************************************************************************** |
| 2 ** | |
| 3 ** pydc - python dyncall package | |
| 4 ** | |
| 5 ** python extension package in C | |
| 28 | 6 ** Copyright 2007-2016 Daniel Adler |
| 7 ** 2018-2020 Tassilo Philipp | |
| 0 | 8 ** |
| 28 | 9 ** December 04, 2007: initial |
| 10 ** March 22, 2016: update to dyncall 0.9, includes breaking sig char changes | |
| 11 ** April 19, 2018: update to dyncall 1.0 | |
| 12 ** April 7, 2020: update to dyncall 1.1, Python 3 support, using the Capsule | |
| 13 ** API, as well as support for python unicode strings | |
| 0 | 14 ** |
| 15 *****************************************************************************/ | |
| 16 | |
| 17 #include <Python.h> | |
| 18 #include "dynload.h" | |
| 19 #include <limits.h> | |
| 20 | |
| 28 | 21 |
| 22 | |
| 23 #if ( (PY_VERSION_HEX < 0x02070000) \ | |
| 24 || ((PY_VERSION_HEX >= 0x03000000) \ | |
| 25 && (PY_VERSION_HEX < 0x03010000)) ) | |
| 26 # define DcPyCObject_FromVoidPtr(ptr, dtor) PyCObject_FromVoidPtr((ptr), (dtor)) | |
| 27 # define DcPyCObject_AsVoidPtr(ppobj) PyCObject_AsVoidPtr((ppobj)) | |
| 28 # define DcPyCObject_SetVoidPtr(ppobj, ptr) PyCObject_SetVoidPtr((ppobj), (ptr)) | |
| 29 #else | |
| 30 # define USE_CAPSULE_API | |
| 31 # define DcPyCObject_FromVoidPtr(ptr, dtor) PyCapsule_New((ptr), NULL, (dtor)) | |
| 32 # define DcPyCObject_AsVoidPtr(ppobj) PyCapsule_GetPointer((ppobj), NULL) | |
| 29 | 33 # define DcPyCObject_SetVoidPtr(ppobj, ptr) //@@@ unsure what to do, cannot/shouldn't call this with a null pointer as this wants to call the dtor, so not doing anything: PyCapsule_SetPointer((ppobj), (ptr)) // this might need to call the dtor to behave like PyCObject_SetVoidPtr? |
| 28 | 34 #endif |
| 35 | |
| 36 #if PY_MAJOR_VERSION >= 3 | |
| 29 | 37 # define EXPECT_LONG_TYPE_STR "an int" |
| 28 | 38 # define DcPyString_GET_SIZE PyBytes_GET_SIZE |
| 39 # define DcPyString_Check PyBytes_Check | |
| 40 # define DcPyString_AsString PyBytes_AsString | |
| 41 # define DcPyInt_Check PyLong_Check | |
| 42 # define DcPyInt_AsLong PyLong_AsLong | |
| 43 # define DcPyInt_AS_LONG PyLong_AS_LONG | |
| 44 #else | |
| 29 | 45 # define EXPECT_LONG_TYPE_STR "an int or a long" |
| 28 | 46 # define DcPyString_GET_SIZE PyString_GET_SIZE |
| 47 # define DcPyString_Check PyString_Check | |
| 48 # define DcPyString_AsString PyString_AsString | |
| 49 # define DcPyInt_Check PyInt_Check | |
| 50 # define DcPyInt_AsLong PyInt_AsLong | |
| 51 # define DcPyInt_AS_LONG PyInt_AS_LONG | |
| 52 #endif | |
| 53 | |
| 0 | 54 /* PyCObject destructor callback for libhandle */ |
| 55 | |
| 28 | 56 #if defined(USE_CAPSULE_API) |
| 57 void free_library(PyObject* capsule) | |
| 58 { | |
| 29 | 59 void* libhandle = PyCapsule_GetPointer(capsule, NULL); |
| 28 | 60 #else |
|
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61 void free_library(void* libhandle) |
| 0 | 62 { |
| 28 | 63 #endif |
| 29 | 64 if (libhandle != 0) |
| 65 dlFreeLibrary(libhandle); | |
| 0 | 66 } |
| 67 | |
| 28 | 68 |
| 0 | 69 /* load function */ |
| 70 | |
| 71 static PyObject* | |
| 72 pydc_load(PyObject* self, PyObject* args) | |
| 73 { | |
| 29 | 74 const char* libpath; |
| 75 void* libhandle; | |
| 0 | 76 |
| 29 | 77 if (!PyArg_ParseTuple(args,"s", &libpath)) |
| 78 return PyErr_Format(PyExc_RuntimeError, "libpath argument (string) missing"); | |
| 0 | 79 |
| 29 | 80 libhandle = dlLoadLibrary(libpath); |
| 0 | 81 |
| 29 | 82 if (!libhandle) |
| 83 return PyErr_Format(PyExc_RuntimeError, "dlLoadLibrary('%s') failed", libpath); | |
| 0 | 84 |
| 29 | 85 return DcPyCObject_FromVoidPtr(libhandle, &free_library); |
| 0 | 86 } |
| 87 | |
| 88 /* find function */ | |
| 89 | |
| 90 static PyObject* | |
| 91 pydc_find(PyObject* self, PyObject* args) | |
| 92 { | |
| 29 | 93 PyObject* pcobj; |
| 94 const char* symbol; | |
| 95 void* libhandle; | |
| 96 void* funcptr; | |
| 0 | 97 |
| 29 | 98 if (!PyArg_ParseTuple(args, "Os", &pcobj, &symbol)) |
| 99 return PyErr_Format(PyExc_RuntimeError, "argument mismatch"); | |
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100 |
| 29 | 101 libhandle = DcPyCObject_AsVoidPtr(pcobj); |
| 102 if (!libhandle) | |
| 103 return PyErr_Format(PyExc_RuntimeError, "libhandle is null"); | |
| 0 | 104 |
| 29 | 105 funcptr = dlFindSymbol(libhandle, symbol); |
| 106 if (!funcptr) | |
| 107 return PyErr_Format(PyExc_RuntimeError, "symbol '%s' not found", symbol); | |
| 0 | 108 |
| 29 | 109 return DcPyCObject_FromVoidPtr(funcptr, NULL); |
| 0 | 110 } |
| 111 | |
| 112 /* free function */ | |
| 113 | |
| 114 static PyObject* | |
| 115 pydc_free(PyObject* self, PyObject* args) | |
| 116 { | |
| 29 | 117 PyObject* pcobj; |
| 118 void* libhandle; | |
| 0 | 119 |
| 29 | 120 if (!PyArg_ParseTuple(args, "O", &pcobj)) |
| 121 return PyErr_Format(PyExc_RuntimeError, "argument mismatch"); | |
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122 |
| 29 | 123 libhandle = DcPyCObject_AsVoidPtr(pcobj); |
| 124 if (!libhandle) | |
| 125 return PyErr_Format(PyExc_RuntimeError, "libhandle is NULL"); | |
| 0 | 126 |
| 29 | 127 dlFreeLibrary(libhandle); |
| 128 DcPyCObject_SetVoidPtr(pcobj, NULL); | |
| 28 | 129 |
| 29 | 130 Py_RETURN_NONE; |
| 0 | 131 } |
| 132 | |
| 28 | 133 |
| 0 | 134 #include "dyncall.h" |
| 135 #include "dyncall_signature.h" | |
| 136 | |
| 137 DCCallVM* gpCall; | |
| 138 | |
| 29 | 139 |
| 0 | 140 /* call function */ |
| 141 | |
| 142 static PyObject* | |
| 143 pydc_call(PyObject* self, PyObject* in_args) | |
| 144 { | |
| 29 | 145 PyObject *pcobj_funcptr, *args; |
| 146 const char *signature, *ptr; | |
| 147 char ch; | |
| 148 int pos, ts; | |
| 149 void* pfunc; | |
| 150 | |
| 151 if (!PyArg_ParseTuple(in_args,"OsO", &pcobj_funcptr, &signature, &args)) | |
| 152 return PyErr_Format(PyExc_RuntimeError, "argument mismatch"); | |
| 153 | |
| 154 pfunc = DcPyCObject_AsVoidPtr(pcobj_funcptr); | |
| 155 if (!pfunc) | |
| 156 return PyErr_Format( PyExc_RuntimeError, "function pointer is NULL" ); | |
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157 |
| 29 | 158 ptr = signature; |
| 159 pos = 0; | |
| 160 ts = PyTuple_Size(args); | |
| 161 | |
| 162 dcReset(gpCall); | |
| 28 | 163 |
| 29 | 164 for (ch = *ptr; ch != '\0' && ch != ')'; ch = *++ptr) |
| 165 { | |
| 166 PyObject* po; | |
| 167 | |
| 168 if (pos > ts) | |
| 169 return PyErr_Format( PyExc_RuntimeError, "expecting more arguments" ); | |
| 28 | 170 |
| 29 | 171 po = PyTuple_GetItem(args, pos); |
| 172 | |
| 173 ++pos; // incr here, code below uses it as 1-based argument index for error strings | |
| 0 | 174 |
| 29 | 175 switch(ch) |
| 176 { | |
| 177 case DC_SIGCHAR_BOOL: | |
| 178 if ( !PyBool_Check(po) ) | |
| 179 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting a bool", pos ); | |
| 180 dcArgBool(gpCall, (Py_True == po) ? DC_TRUE : DC_FALSE); | |
| 181 break; | |
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diff
changeset
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182 |
| 29 | 183 case DC_SIGCHAR_CHAR: |
| 184 case DC_SIGCHAR_UCHAR: | |
| 185 { | |
| 186 DCchar c; | |
| 187 if ( PyUnicode_Check(po) ) | |
| 188 { | |
| 189 #if (PY_VERSION_HEX < 0x03030000) | |
| 190 Py_UNICODE cu; | |
| 191 if (PyUnicode_GET_SIZE(po) != 1) | |
| 192 #else | |
| 193 Py_UCS4 cu; | |
| 194 if (PyUnicode_GET_LENGTH(po) != 1) | |
| 195 #endif | |
| 196 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting a string with length of 1 (a char string)", pos ); | |
| 0 | 197 |
| 29 | 198 #if (PY_VERSION_HEX < 0x03030000) |
| 199 cu = PyUnicode_AS_UNICODE(po)[0]; | |
| 200 #else | |
| 201 cu = PyUnicode_ReadChar(po, 0); | |
| 202 #endif | |
| 203 // check against UCHAR_MAX in every case b/c Py_UCS4 is unsigned | |
| 204 if ( (cu > UCHAR_MAX)) | |
| 205 return PyErr_Format( PyExc_RuntimeError, "arg %d out of range - expecting a char code", pos ); //@@@ error message needs to specify python types | |
| 206 c = (DCchar) cu; | |
| 207 } | |
| 208 else if ( DcPyString_Check(po) ) | |
| 209 { | |
| 210 size_t l; | |
| 211 char* s; | |
| 212 l = DcPyString_GET_SIZE(po); | |
| 213 if (l != 1) | |
| 214 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting a string with length of 1 (a char string)", pos ); | |
| 215 s = DcPyString_AsString(po); | |
| 216 c = (DCchar) s[0]; | |
| 217 } | |
| 218 else if ( DcPyInt_Check(po) ) | |
| 219 { | |
| 220 long l = DcPyInt_AsLong(po); | |
| 221 if (ch == DC_SIGCHAR_CHAR && (l < CHAR_MIN || l > CHAR_MAX)) | |
| 222 return PyErr_Format( PyExc_RuntimeError, "arg %d out of range - expecting %d <= arg <= %d, got %ld", pos, CHAR_MIN, CHAR_MAX, l ); | |
| 223 if (ch == DC_SIGCHAR_UCHAR && (l < 0 || l > UCHAR_MAX)) | |
| 224 return PyErr_Format( PyExc_RuntimeError, "arg %d out of range - expecting 0 <= arg <= %d, got %ld", pos, UCHAR_MAX, l ); | |
| 225 c = (DCchar) l; | |
| 226 } | |
| 227 else | |
| 228 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting a char", pos ); | |
| 229 dcArgChar(gpCall, c); | |
| 230 } | |
| 231 break; | |
| 232 | |
| 233 case DC_SIGCHAR_SHORT: | |
| 234 { | |
| 235 long l; | |
| 236 if ( !DcPyInt_Check(po) ) | |
| 237 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting an int", pos ); | |
| 238 l = DcPyInt_AS_LONG(po); | |
| 239 if (l < SHRT_MIN || l > SHRT_MAX) | |
| 240 return PyErr_Format( PyExc_RuntimeError, "arg %d out of range - expecting %d <= arg <= %d, got %ld", pos, SHRT_MIN, SHRT_MAX, l ); | |
| 241 dcArgShort(gpCall, (DCshort)l); | |
| 242 } | |
| 243 break; | |
| 244 | |
| 245 case DC_SIGCHAR_USHORT: | |
| 246 { | |
| 247 long l; | |
| 248 if ( !DcPyInt_Check(po) ) | |
| 249 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting an int", pos ); | |
| 250 l = DcPyInt_AS_LONG(po); | |
| 251 if (l < 0 || l > USHRT_MAX) | |
| 252 return PyErr_Format( PyExc_RuntimeError, "arg %d out of range - expecting 0 <= arg <= %d, got %ld", pos, USHRT_MAX, l ); | |
| 253 dcArgShort(gpCall, (DCshort)l); | |
| 254 } | |
| 255 break; | |
|
16
a40084782546
- added support for more return values to python binding
cslag
parents:
5
diff
changeset
|
256 |
| 29 | 257 case DC_SIGCHAR_INT: |
| 258 case DC_SIGCHAR_UINT: | |
| 259 if ( !DcPyInt_Check(po) ) | |
| 260 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting an int", pos ); | |
| 261 dcArgInt(gpCall, (DCint) DcPyInt_AS_LONG(po)); | |
| 262 break; | |
| 263 | |
| 264 case DC_SIGCHAR_LONG: | |
| 265 case DC_SIGCHAR_ULONG: | |
| 266 if ( !DcPyInt_Check(po) ) | |
| 267 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting an int", pos ); | |
| 268 dcArgLong(gpCall, (DClong) PyLong_AsLong(po)); | |
| 269 break; | |
| 270 | |
| 271 case DC_SIGCHAR_LONGLONG: | |
| 272 case DC_SIGCHAR_ULONGLONG: | |
| 273 #if PY_MAJOR_VERSION < 3 | |
| 274 if ( PyInt_Check(po) ) | |
| 275 dcArgLongLong(gpCall, (DClonglong) PyInt_AS_LONG(po)); | |
| 276 else | |
| 277 #endif | |
| 278 if ( !PyLong_Check(po) ) | |
| 279 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting " EXPECT_LONG_TYPE_STR, pos ); | |
| 280 dcArgLongLong(gpCall, (DClonglong)PyLong_AsLongLong(po)); | |
| 281 break; | |
| 282 | |
| 283 case DC_SIGCHAR_FLOAT: | |
| 284 if (!PyFloat_Check(po)) | |
| 285 return PyErr_Format( PyExc_RuntimeError, "arg %d - expeecting a float", pos ); | |
| 286 dcArgFloat(gpCall, (float)PyFloat_AsDouble(po)); | |
| 287 break; | |
| 288 | |
| 289 case DC_SIGCHAR_DOUBLE: | |
| 290 if (!PyFloat_Check(po)) | |
| 291 return PyErr_Format( PyExc_RuntimeError, "arg %d - expeecting a float", pos ); | |
| 292 dcArgDouble(gpCall, PyFloat_AsDouble(po)); | |
| 293 break; | |
| 0 | 294 |
| 29 | 295 case DC_SIGCHAR_POINTER: |
| 296 { | |
| 297 DCpointer p; | |
| 298 if ( PyUnicode_Check(po) ) { | |
| 299 PyObject* bo = PyUnicode_AsEncodedString(po, "utf-8", "strict"); // Owned reference @@@ | |
| 300 if (bo) { | |
| 301 p = PyBytes_AS_STRING(bo); // Borrowed pointer | |
| 302 //p = strdup(my_result); | |
| 303 //Py_DECREF(bo); | |
| 304 } | |
| 305 } else if ( DcPyString_Check(po) ) | |
| 306 p = (DCpointer) DcPyString_AsString(po); | |
| 307 #if PY_MAJOR_VERSION < 3 | |
| 308 else if ( PyInt_Check(po) ) | |
| 309 p = (DCpointer) PyInt_AS_LONG(po); | |
| 310 #endif | |
| 311 else if ( PyLong_Check(po) ) | |
| 312 p = (DCpointer) PyLong_AsVoidPtr(po); | |
| 313 else | |
| 314 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting a promoting pointer-type (int,string)", pos ); //@@@ error message needs to specify python types | |
| 315 dcArgPointer(gpCall, p); | |
| 316 } | |
| 317 break; | |
| 0 | 318 |
| 29 | 319 case DC_SIGCHAR_STRING: |
| 320 { | |
| 321 const char* p; | |
| 322 if ( PyUnicode_Check(po) ) { | |
| 323 PyObject* bo = PyUnicode_AsEncodedString(po, "utf-8", "strict"); // Owned reference @@@ | |
| 324 if (bo) { | |
| 325 p = PyBytes_AS_STRING(bo); // Borrowed pointer | |
| 326 //p = strdup(my_result);@@@ | |
| 327 //Py_DECREF(bo);@@@ | |
| 328 } | |
| 329 } else if ( DcPyString_Check(po) ) { | |
| 330 p = DcPyString_AsString(po); | |
| 331 } else { | |
| 332 return PyErr_Format( PyExc_RuntimeError, "arg %d - expecting a string", pos ); //@@@ error message needs to specify python types | |
| 333 } | |
| 334 dcArgPointer(gpCall, (DCpointer) p); | |
| 335 } | |
| 336 break; | |
| 337 | |
| 338 default: | |
| 339 return PyErr_Format( PyExc_RuntimeError, "unknown signature character '%c'", ch); | |
| 340 } | |
| 341 } | |
| 342 | |
| 343 if (pos != ts) | |
| 344 return PyErr_Format( PyExc_RuntimeError, "too many arguments"); | |
| 345 | |
| 346 if (ch == '\0') | |
| 347 return PyErr_Format( PyExc_RuntimeError, "return value missing in signature"); | |
| 348 | |
| 349 | |
| 350 ch = *++ptr; | |
| 351 switch(ch) | |
| 352 { | |
| 353 case DC_SIGCHAR_VOID: dcCallVoid (gpCall, pfunc); Py_RETURN_NONE; | |
| 354 case DC_SIGCHAR_BOOL: return dcCallBool (gpCall, pfunc)?Py_True:Py_False; | |
| 355 case DC_SIGCHAR_CHAR: return Py_BuildValue("b", dcCallChar (gpCall, pfunc)); | |
| 356 case DC_SIGCHAR_UCHAR: return Py_BuildValue("B", dcCallChar (gpCall, pfunc)); | |
| 357 case DC_SIGCHAR_SHORT: return Py_BuildValue("h", dcCallShort (gpCall, pfunc)); | |
| 358 case DC_SIGCHAR_USHORT: return Py_BuildValue("H", dcCallShort (gpCall, pfunc)); | |
| 359 case DC_SIGCHAR_INT: return Py_BuildValue("i", dcCallInt (gpCall, pfunc)); | |
| 360 case DC_SIGCHAR_UINT: return Py_BuildValue("I", dcCallInt (gpCall, pfunc)); | |
| 361 case DC_SIGCHAR_LONG: return Py_BuildValue("l", dcCallLong (gpCall, pfunc)); | |
| 362 case DC_SIGCHAR_ULONG: return Py_BuildValue("k", dcCallLong (gpCall, pfunc)); | |
| 363 case DC_SIGCHAR_LONGLONG: return Py_BuildValue("L", dcCallLongLong(gpCall, pfunc)); | |
| 364 case DC_SIGCHAR_ULONGLONG: return Py_BuildValue("K", dcCallLongLong(gpCall, pfunc)); | |
| 365 case DC_SIGCHAR_FLOAT: return Py_BuildValue("f", dcCallFloat (gpCall, pfunc)); | |
| 366 case DC_SIGCHAR_DOUBLE: return Py_BuildValue("d", dcCallDouble (gpCall, pfunc)); | |
| 367 case DC_SIGCHAR_STRING: return Py_BuildValue("s", dcCallPointer (gpCall, pfunc)); | |
| 368 case DC_SIGCHAR_POINTER: return Py_BuildValue("n", dcCallPointer (gpCall, pfunc)); // @@@test, this used to be 'p' which doesn't exist, 'n' is for "Py_ssize_t" | |
| 369 default: return PyErr_Format(PyExc_RuntimeError, "invalid return type signature"); | |
| 370 } | |
| 0 | 371 } |
| 372 | |
| 373 | |
| 28 | 374 |
| 375 | |
| 376 | |
| 377 #define PYDC_TO_STR_(x) #x | |
| 378 #define PYDC_TO_STR(x) PYDC_TO_STR_(x) | |
| 379 #define PYDC_CONCAT_(x, y) x ## y | |
| 380 #define PYDC_CONCAT(x, y) PYDC_CONCAT_(x, y) | |
| 381 | |
| 382 #define PYDC_MOD_NAME pydcext | |
| 383 #define PYDC_MOD_NAME_STR PYDC_TO_STR(PYDC_MOD_NAME) | |
| 384 #define PYDC_MOD_DESC_STR "dyncall bindings for python" | |
| 385 | |
| 386 #if PY_MAJOR_VERSION >= 3 | |
| 387 # define PY_MOD_INIT_FUNC_NAME PYDC_CONCAT(PyInit_, PYDC_MOD_NAME) | |
| 388 #else | |
| 389 # define PY_MOD_INIT_FUNC_NAME PYDC_CONCAT(init, PYDC_MOD_NAME) | |
| 390 #endif | |
| 391 | |
| 0 | 392 |
| 393 PyMODINIT_FUNC | |
| 28 | 394 PY_MOD_INIT_FUNC_NAME(void) |
| 0 | 395 { |
| 29 | 396 static PyMethodDef pydcMethods[] = { |
| 397 {"load", pydc_load, METH_VARARGS, "load library"}, | |
| 398 {"find", pydc_find, METH_VARARGS, "find symbols"}, | |
| 399 {"free", pydc_free, METH_VARARGS, "free library"}, | |
| 400 {"call", pydc_call, METH_VARARGS, "call function"}, | |
| 401 {NULL,NULL,0,NULL} | |
| 402 }; | |
| 28 | 403 |
| 29 | 404 PyObject* m; |
| 28 | 405 #if PY_MAJOR_VERSION >= 3 |
| 29 | 406 static struct PyModuleDef moddef = { PyModuleDef_HEAD_INIT, PYDC_MOD_NAME_STR, PYDC_MOD_DESC_STR, -1, pydcMethods, NULL, NULL, NULL, NULL }; |
| 407 m = PyModule_Create(&moddef); | |
| 28 | 408 #else |
| 29 | 409 m = Py_InitModule3(PYDC_MOD_NAME_STR, pydcMethods, PYDC_MOD_DESC_STR); |
| 28 | 410 #endif |
| 411 | |
| 29 | 412 if(m) |
| 413 gpCall = dcNewCallVM(4096); //@@@ one shared callvm for the entire module, this is not reentrant | |
| 28 | 414 |
| 415 #if PY_MAJOR_VERSION >= 3 | |
| 29 | 416 return m; |
| 28 | 417 #endif |
| 0 | 418 } |
| 419 |