gi/pygi-invoke.c

   1 /* -*- Mode: C; c-basic-offset: 4 -*-
   2  * vim: tabstop=4 shiftwidth=4 expandtab
   3  *
   4  * Copyright (C) 2005-2009 Johan Dahlin <johan@gnome.org>
   5  * Copyright (C) 2011 John (J5) Palimier <johnp@redhat.com>
   6  *
   7  *   pygi-invoke.c: main invocation function
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
  22  * USA
  23  */
  24
  25 #include <pyglib.h>
  26 #include "pygi-invoke.h"
  27 #include "pygi-marshal-cleanup.h"
  28
  29 static inline gboolean
  30 _invoke_callable (PyGIInvokeState *state,
  31                   PyGICallableCache *cache,
  32                   GICallableInfo *callable_info,
  33                   GCallback function_ptr)
  34 {
  35     GError *error;
  36     gint retval;
  37
  38     error = NULL;
  39
  40     Py_BEGIN_ALLOW_THREADS;
  41
  42     /* FIXME: use this for now but we can streamline the calls */
  43     if (cache->function_type == PYGI_FUNCTION_TYPE_VFUNC)
  44         retval = g_vfunc_info_invoke ( callable_info,
  45                                        state->implementor_gtype,
  46                                        state->in_args,
  47                                        cache->n_from_py_args,
  48                                        state->out_args,
  49                                        cache->n_to_py_args,
  50                                       &state->return_arg,
  51                                       &error);
  52     else if (g_base_info_get_type (callable_info) == GI_INFO_TYPE_CALLBACK)
  53         retval = g_callable_info_invoke (callable_info,
  54                                          function_ptr,
  55                                          state->in_args,
  56                                          cache->n_from_py_args,
  57                                          state->out_args,
  58                                          cache->n_to_py_args,
  59                                          &state->return_arg,
  60                                          FALSE,
  61                                          FALSE,
  62                                          &error);
  63     else
  64         retval = g_function_info_invoke ( callable_info,
  65                                           state->in_args,
  66                                           cache->n_from_py_args,
  67                                           state->out_args,
  68                                           cache->n_to_py_args,
  69                                          &state->return_arg,
  70                                          &error);
  71     Py_END_ALLOW_THREADS;
  72
  73     if (!retval) {
  74         g_assert (error != NULL);
  75         pyglib_error_check (&error);
  76
  77         /* It is unclear if the error occured before or after the C
  78          * function was invoked so for now assume success
  79          * We eventually should marshal directly to FFI so we no longer
  80          * have to use the reference implementation
  81          */
  82         pygi_marshal_cleanup_args_from_py_marshal_success (state, cache);
  83
  84         return FALSE;
  85     }
  86
  87     if (state->error != NULL) {
  88         if (pyglib_error_check (&(state->error))) {
  89             /* even though we errored out, the call itself was successful,
  90                so we assume the call processed all of the parameters */
  91             pygi_marshal_cleanup_args_from_py_marshal_success (state, cache);
  92             return FALSE;
  93         }
  94     }
  95
  96     return TRUE;
  97 }
  98
  99 static gboolean
 100 _check_for_unexpected_kwargs (const gchar *function_name,
 101                               GHashTable  *arg_name_hash,
 102                               PyObject    *py_kwargs)
 103 {
 104     PyObject *dict_key, *dict_value;
 105     Py_ssize_t dict_iter_pos = 0;
 106
 107     while (PyDict_Next (py_kwargs, &dict_iter_pos, &dict_key, &dict_value)) {
 108         PyObject *key;
 109
 110 #if PY_VERSION_HEX < 0x03000000
 111         if (PyString_Check (dict_key)) {
 112             Py_INCREF (dict_key);
 113             key = dict_key;
 114         } else
 115 #endif
 116         {
 117             key = PyUnicode_AsUTF8String (dict_key);
 118             if (key == NULL) {
 119                 return FALSE;
 120             }
 121         }
 122
 123         if (g_hash_table_lookup (arg_name_hash, PyBytes_AsString(key)) == NULL) {
 124             PyErr_Format (PyExc_TypeError,
 125                           "%.200s() got an unexpected keyword argument '%.400s'",
 126                           function_name,
 127                           PyBytes_AsString (key));
 128             Py_DECREF (key);
 129             return FALSE;
 130         }
 131
 132         Py_DECREF (key);
 133     }
 134     return TRUE;
 135 }
 136
 137 /**
 138  * _py_args_combine_and_check_length:
 139  * @cache: PyGICallableCache
 140  * @py_args: the tuple of positional arguments.
 141  * @py_kwargs: the dict of keyword arguments to be merged with py_args.
 142  *
 143  * Returns: New value reference to the combined py_args and py_kwargs.
 144  */
 145 static PyObject *
 146 _py_args_combine_and_check_length (PyGICallableCache *cache,
 147                                    PyObject    *py_args,
 148                                    PyObject    *py_kwargs)
 149 {
 150     PyObject *combined_py_args = NULL;
 151     Py_ssize_t n_py_args, n_py_kwargs, i;
 152     guint n_expected_args;
 153     GSList *l;
 154     const gchar *function_name = cache->name;
 155
 156     n_py_args = PyTuple_GET_SIZE (py_args);
 157     if (py_kwargs == NULL)
 158         n_py_kwargs = 0;
 159     else
 160         n_py_kwargs = PyDict_Size (py_kwargs);
 161
 162     /* Fast path, we already have the exact number of args and not kwargs. */
 163     n_expected_args = g_slist_length (cache->arg_name_list);
 164     if (n_py_kwargs == 0 && n_py_args == n_expected_args) {
 165         Py_INCREF (py_args);
 166         return py_args;
 167     }
 168
 169     if (n_expected_args < n_py_args) {
 170         PyErr_Format (PyExc_TypeError,
 171                       "%.200s() takes exactly %d %sargument%s (%zd given)",
 172                       function_name,
 173                       n_expected_args,
 174                       n_py_kwargs > 0 ? "non-keyword " : "",
 175                       n_expected_args == 1 ? "" : "s",
 176                       n_py_args);
 177         return NULL;
 178     }
 179
 180     if (n_py_kwargs > 0 && !_check_for_unexpected_kwargs (function_name,
 181                                                           cache->arg_name_hash,
 182                                                           py_kwargs)) {
 183         return NULL;
 184     }
 185
 186     /* will hold arguments from both py_args and py_kwargs
 187      * when they are combined into a single tuple */
 188     combined_py_args = PyTuple_New (n_expected_args);
 189
 190     for (i = 0; i < n_py_args; i++) {
 191         PyObject *item = PyTuple_GET_ITEM (py_args, i);
 192         Py_INCREF (item);
 193         PyTuple_SET_ITEM (combined_py_args, i, item);
 194     }
 195
 196     for (i = 0, l = cache->arg_name_list; i < n_expected_args && l; i++, l = l->next) {
 197         PyObject *py_arg_item, *kw_arg_item = NULL;
 198         const gchar *arg_name = l->data;
 199
 200         if (n_py_kwargs > 0 && arg_name != NULL) {
 201             /* NULL means this argument has no keyword name */
 202             /* ex. the first argument to a method or constructor */
 203             kw_arg_item = PyDict_GetItemString (py_kwargs, arg_name);
 204         }
 205         py_arg_item = PyTuple_GET_ITEM (combined_py_args, i);
 206
 207         if (kw_arg_item != NULL && py_arg_item == NULL) {
 208             Py_INCREF (kw_arg_item);
 209             PyTuple_SET_ITEM (combined_py_args, i, kw_arg_item);
 210
 211         } else if (kw_arg_item == NULL && py_arg_item == NULL) {
 212             PyErr_Format (PyExc_TypeError,
 213                           "%.200s() takes exactly %d %sargument%s (%zd given)",
 214                           function_name,
 215                           n_expected_args,
 216                           n_py_kwargs > 0 ? "non-keyword " : "",
 217                           n_expected_args == 1 ? "" : "s",
 218                           n_py_args);
 219
 220             Py_DECREF (combined_py_args);
 221             return NULL;
 222
 223         } else if (kw_arg_item != NULL && py_arg_item != NULL) {
 224             PyErr_Format (PyExc_TypeError,
 225                           "%.200s() got multiple values for keyword argument '%.200s'",
 226                           function_name,
 227                           arg_name);
 228
 229             Py_DECREF (combined_py_args);
 230             return NULL;
 231         }
 232     }
 233
 234     return combined_py_args;
 235 }
 236
 237 static inline gboolean
 238 _invoke_state_init_from_callable_cache (PyGIInvokeState *state,
 239                                         PyGICallableCache *cache,
 240                                         PyObject *py_args,
 241                                         PyObject *kwargs)
 242 {
 243     PyObject *combined_args = NULL;
 244     state->implementor_gtype = 0;
 245
 246     /* TODO: We don't use the class parameter sent in by  the structure
 247      * so we remove it from the py_args tuple but we can keep it
 248      * around if we want to call actual gobject constructors
 249      * in the future instead of calling g_object_new
 250      */
 251     if (cache->function_type == PYGI_FUNCTION_TYPE_CONSTRUCTOR) {
 252         PyObject *constructor_class;
 253         constructor_class = PyTuple_GetItem (py_args, 0);
 254
 255         if (constructor_class == NULL) {
 256             PyErr_Clear ();
 257             PyErr_Format (PyExc_TypeError,
 258                           "Constructors require the class to be passed in as an argument, "
 259                           "No arguments passed to the %s constructor.",
 260                           cache->name);
 261
 262             return FALSE;
 263         }
 264     } else if (cache->function_type == PYGI_FUNCTION_TYPE_VFUNC) {
 265         PyObject *py_gtype;
 266         py_gtype = PyTuple_GetItem (py_args, 0);
 267         if (py_gtype == NULL) {
 268             PyErr_SetString (PyExc_TypeError,
 269                              "need the GType of the implementor class");
 270             return FALSE;
 271         }
 272
 273         state->implementor_gtype = pyg_type_from_object (py_gtype);
 274
 275         if (state->implementor_gtype == 0)
 276             return FALSE;
 277     }
 278
 279     if  (cache->function_type == PYGI_FUNCTION_TYPE_CONSTRUCTOR ||
 280             cache->function_type == PYGI_FUNCTION_TYPE_VFUNC) {
 281
 282         /* we could optimize this by using offsets instead of modifying the tuple but it makes the
 283          * code more error prone and confusing so don't do that unless profiling shows
 284          * significant gain
 285          */
 286         combined_args = PyTuple_GetSlice (py_args, 1, PyTuple_Size (py_args));
 287     } else {
 288         combined_args = py_args;
 289         Py_INCREF (combined_args);
 290     }
 291
 292     state->py_in_args = _py_args_combine_and_check_length (cache,
 293                                                            combined_args,
 294                                                            kwargs);
 295     Py_DECREF (combined_args);
 296
 297     if (state->py_in_args == NULL) {
 298         return FALSE;
 299     }
 300     state->n_py_in_args = PyTuple_Size (state->py_in_args);
 301
 302     state->args = g_slice_alloc0 (cache->n_args * sizeof (GIArgument *));
 303     if (state->args == NULL && cache->n_args != 0) {
 304         PyErr_NoMemory();
 305         return FALSE;
 306     }
 307
 308     state->args_data = g_slice_alloc0 (cache->n_args * sizeof (gpointer));
 309     if (state->args_data == NULL && cache->n_args != 0) {
 310         PyErr_NoMemory();
 311         return FALSE;
 312     }
 313
 314     state->in_args = g_slice_alloc0 (cache->n_from_py_args * sizeof(GIArgument));
 315     if (state->in_args == NULL && cache->n_from_py_args != 0) {
 316         PyErr_NoMemory ();
 317         return FALSE;
 318     }
 319
 320     state->out_values = g_slice_alloc0 (cache->n_to_py_args * sizeof(GIArgument));
 321     if (state->out_values == NULL && cache->n_to_py_args != 0) {
 322         PyErr_NoMemory ();
 323         return FALSE;
 324     }
 325
 326     state->out_args = g_slice_alloc0 (cache->n_to_py_args * sizeof(GIArgument));
 327     if (state->out_args == NULL && cache->n_to_py_args != 0) {
 328         PyErr_NoMemory ();
 329         return FALSE;
 330     }
 331
 332     state->error = NULL;
 333
 334     return TRUE;
 335 }
 336
 337 static inline void
 338 _invoke_state_clear (PyGIInvokeState *state, PyGICallableCache *cache)
 339 {
 340     g_slice_free1 (cache->n_args * sizeof(GIArgument *), state->args);
 341     g_slice_free1 (cache->n_args * sizeof(gpointer), state->args_data);
 342     g_slice_free1 (cache->n_from_py_args * sizeof(GIArgument), state->in_args);
 343     g_slice_free1 (cache->n_to_py_args * sizeof(GIArgument), state->out_args);
 344     g_slice_free1 (cache->n_to_py_args * sizeof(GIArgument), state->out_values);
 345
 346     Py_XDECREF (state->py_in_args);
 347 }
 348
 349 static gboolean _caller_alloc (PyGIInvokeState *state,
 350                                PyGIArgCache *arg_cache,
 351                                gssize arg_count,
 352                                gssize out_count)
 353 {
 354     if (arg_cache->type_tag == GI_TYPE_TAG_INTERFACE) {
 355         PyGIInterfaceCache *iface_cache = (PyGIInterfaceCache *)arg_cache;
 356
 357         state->out_args[out_count].v_pointer = NULL;
 358         state->args[arg_count] = &state->out_args[out_count];
 359         if (g_type_is_a (iface_cache->g_type, G_TYPE_BOXED)) {
 360             state->args[arg_count]->v_pointer =
 361                 _pygi_boxed_alloc (iface_cache->interface_info, NULL);
 362         } else if (iface_cache->g_type == G_TYPE_VALUE) {
 363             state->args[arg_count]->v_pointer = g_slice_new0 (GValue);
 364         } else if (iface_cache->is_foreign) {
 365             PyObject *foreign_struct =
 366                 pygi_struct_foreign_convert_from_g_argument (
 367                     iface_cache->interface_info,
 368                     NULL);
 369
 370                 pygi_struct_foreign_convert_to_g_argument (foreign_struct,
 371                                                            iface_cache->interface_info,
 372                                                            GI_TRANSFER_EVERYTHING,
 373                                                            state->args[arg_count]);
 374         } else {
 375                 gssize size = g_struct_info_get_size(
 376                     (GIStructInfo *)iface_cache->interface_info);
 377                 state->args[arg_count]->v_pointer = g_malloc0 (size);
 378         }
 379     } else if (arg_cache->type_tag == GI_TYPE_TAG_ARRAY) {
 380         PyGISequenceCache *seq_cache = (PyGISequenceCache *)arg_cache;
 381
 382         state->out_args[out_count].v_pointer = g_array_new (TRUE, TRUE, seq_cache->item_size);
 383         state->args[arg_count] = &state->out_args[out_count];
 384     } else {
 385         return FALSE;
 386     }
 387
 388     if (state->args[arg_count]->v_pointer == NULL)
 389         return FALSE;
 390
 391
 392     return TRUE;
 393 }
 394
 395 static inline gboolean
 396 _invoke_marshal_in_args (PyGIInvokeState *state, PyGICallableCache *cache)
 397 {
 398     gssize i, in_count, out_count;
 399     in_count = 0;
 400     out_count = 0;
 401
 402     if (state->n_py_in_args > cache->n_py_args) {
 403         PyErr_Format (PyExc_TypeError,
 404                       "%s() takes exactly %zd argument(s) (%zd given)",
 405                       cache->name,
 406                       cache->n_py_args,
 407                       state->n_py_in_args);
 408         return FALSE;
 409     }
 410
 411     for (i = 0; i < cache->n_args; i++) {
 412         GIArgument *c_arg;
 413         PyGIArgCache *arg_cache = cache->args_cache[i];
 414         PyObject *py_arg = NULL;
 415
 416         switch (arg_cache->direction) {
 417             case PYGI_DIRECTION_FROM_PYTHON:
 418                 state->args[i] = &(state->in_args[in_count]);
 419                 in_count++;
 420
 421                 if (arg_cache->meta_type == PYGI_META_ARG_TYPE_CLOSURE) {
 422                     state->args[i]->v_pointer = state->user_data;
 423                     continue;
 424                 } else if (arg_cache->meta_type != PYGI_META_ARG_TYPE_PARENT)
 425                     continue;
 426
 427                 if (arg_cache->py_arg_index >= state->n_py_in_args) {
 428                     PyErr_Format (PyExc_TypeError,
 429                                   "%s() takes exactly %zd argument(s) (%zd given)",
 430                                    cache->name,
 431                                    cache->n_py_args,
 432                                    state->n_py_in_args);
 433
 434                     /* clean up all of the args we have already marshalled,
 435                      * since invoke will not be called
 436                      */
 437                     pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 438                                                                       cache,
 439                                                                       i - 1);
 440                     return FALSE;
 441                 }
 442
 443                 py_arg =
 444                     PyTuple_GET_ITEM (state->py_in_args,
 445                                       arg_cache->py_arg_index);
 446
 447                 break;
 448             case PYGI_DIRECTION_BIDIRECTIONAL:
 449                 /* this will be filled in if it is an child value */
 450                 if (state->in_args[in_count].v_pointer != NULL)
 451                     state->out_values[out_count] = state->in_args[in_count];
 452
 453                 state->in_args[in_count].v_pointer = &state->out_values[out_count];
 454                 in_count++;
 455
 456                 if (arg_cache->meta_type != PYGI_META_ARG_TYPE_CHILD) {
 457                     if (arg_cache->py_arg_index >= state->n_py_in_args) {
 458                         PyErr_Format (PyExc_TypeError,
 459                                       "%s() takes exactly %zd argument(s) (%zd given)",
 460                                        cache->name,
 461                                        cache->n_py_args,
 462                                        state->n_py_in_args);
 463                         pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 464                                                                           cache,
 465                                                                           i - 1);
 466                         return FALSE;
 467                     }
 468
 469                     py_arg =
 470                         PyTuple_GET_ITEM (state->py_in_args,
 471                                           arg_cache->py_arg_index);
 472                 }
 473             case PYGI_DIRECTION_TO_PYTHON:
 474                 if (arg_cache->is_caller_allocates) {
 475                     if (!_caller_alloc (state, arg_cache, i, out_count)) {
 476                         PyErr_Format (PyExc_TypeError,
 477                                       "Could not caller allocate argument %zd of callable %s",
 478                                       i, cache->name);
 479                         pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 480                                                                           cache,
 481                                                                           i - 1);
 482                         return FALSE;
 483                     }
 484                 } else {
 485                     state->out_args[out_count].v_pointer = &state->out_values[out_count];
 486                     state->args[i] = &state->out_values[out_count];
 487                 }
 488                 out_count++;
 489                 break;
 490         }
 491
 492         c_arg = state->args[i];
 493         if (arg_cache->from_py_marshaller != NULL) {
 494             gboolean success;
 495             if (!arg_cache->allow_none && py_arg == Py_None) {
 496                 PyErr_Format (PyExc_TypeError,
 497                               "Argument %zd does not allow None as a value",
 498                               i);
 499
 500                  pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 501                                                                    cache,
 502                                                                    i - 1);
 503                  return FALSE;
 504             }
 505             success = arg_cache->from_py_marshaller (state,
 506                                                               cache,
 507                                                               arg_cache,
 508                                                               py_arg,
 509                                                               c_arg);
 510             if (!success) {
 511                 pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 512                                                                   cache,
 513                                                                   i - 1);
 514                 return FALSE;
 515             }
 516
 517         }
 518
 519     }
 520
 521     return TRUE;
 522 }
 523
 524 static inline PyObject *
 525 _invoke_marshal_out_args (PyGIInvokeState *state, PyGICallableCache *cache)
 526 {
 527     PyObject *py_out = NULL;
 528     PyObject *py_return = NULL;
 529     gssize total_out_args = cache->n_to_py_args;
 530     gboolean has_return = FALSE;
 531
 532     if (cache->return_cache) {
 533         if (!cache->return_cache->is_skipped) {
 534             if (cache->function_type == PYGI_FUNCTION_TYPE_CONSTRUCTOR) {
 535                 if (state->return_arg.v_pointer == NULL) {
 536                     PyErr_SetString (PyExc_TypeError, "constructor returned NULL");
 537                     pygi_marshal_cleanup_args_return_fail (state,
 538                                                        cache);
 539                     return NULL;
 540                 }
 541             }
 542
 543             py_return = cache->return_cache->to_py_marshaller ( state,
 544                                                                 cache,
 545                                                                 cache->return_cache,
 546                                                                &state->return_arg);
 547             if (py_return == NULL) {
 548                 pygi_marshal_cleanup_args_return_fail (state,
 549                                                        cache);
 550                 return NULL;
 551             }
 552
 553
 554             if (cache->return_cache->type_tag != GI_TYPE_TAG_VOID) {
 555                 total_out_args++;
 556                 has_return = TRUE;
 557             }
 558         } else {
 559             if (cache->return_cache->transfer == GI_TRANSFER_EVERYTHING) {
 560                 PyGIMarshalCleanupFunc to_py_cleanup =
 561                     cache->return_cache->to_py_cleanup;
 562
 563                 if (to_py_cleanup != NULL)
 564                     to_py_cleanup ( state,
 565                                     cache->return_cache,
 566                                    &state->return_arg,
 567                                     FALSE);
 568             }
 569         }
 570     }
 571
 572     total_out_args -= cache->n_to_py_child_args;
 573
 574     if (cache->n_to_py_args - cache->n_to_py_child_args  == 0) {
 575         if (cache->return_cache->is_skipped && state->error == NULL) {
 576             /* we skip the return value and have no (out) arguments to return,
 577              * so py_return should be NULL. But we must not return NULL,
 578              * otherwise Python will expect an exception.
 579              */
 580             g_assert (py_return == NULL);
 581             Py_INCREF(Py_None);
 582             py_return = Py_None;
 583         }
 584
 585         py_out = py_return;
 586     } else if (total_out_args == 1) {
 587         /* if we get here there is one out arg an no return */
 588         PyGIArgCache *arg_cache = (PyGIArgCache *)cache->to_py_args->data;
 589         py_out = arg_cache->to_py_marshaller (state,
 590                                               cache,
 591                                               arg_cache,
 592                                               state->args[arg_cache->c_arg_index]);
 593         if (py_out == NULL) {
 594             pygi_marshal_cleanup_args_to_py_parameter_fail (state,
 595                                                             cache,
 596                                                             0);
 597             return NULL;
 598         }
 599
 600     } else {
 601         gssize py_arg_index = 0;
 602         GSList *cache_item = cache->to_py_args;
 603         /* return a tuple */
 604         py_out = PyTuple_New (total_out_args);
 605         if (has_return) {
 606             PyTuple_SET_ITEM (py_out, py_arg_index, py_return);
 607             py_arg_index++;
 608         }
 609
 610         for(; py_arg_index < total_out_args; py_arg_index++) {
 611             PyGIArgCache *arg_cache = (PyGIArgCache *)cache_item->data;
 612             PyObject *py_obj = arg_cache->to_py_marshaller (state,
 613                                                             cache,
 614                                                             arg_cache,
 615                                                             state->args[arg_cache->c_arg_index]);
 616
 617             if (py_obj == NULL) {
 618                 if (has_return)
 619                     py_arg_index--;
 620
 621                 pygi_marshal_cleanup_args_to_py_parameter_fail (state,
 622                                                                 cache,
 623                                                                 py_arg_index);
 624                 Py_DECREF (py_out);
 625                 return NULL;
 626             }
 627
 628             PyTuple_SET_ITEM (py_out, py_arg_index, py_obj);
 629             cache_item = cache_item->next;
 630         }
 631     }
 632     return py_out;
 633 }
 634
 635 PyObject *
 636 pygi_callable_info_invoke (GIBaseInfo *info, PyObject *py_args,
 637                            PyObject *kwargs, PyGICallableCache *cache,
 638                            GCallback function_ptr, gpointer user_data)
 639 {
 640     PyGIInvokeState state = { 0, };
 641     PyObject *ret = NULL;
 642
 643     if (!_invoke_state_init_from_callable_cache (&state, cache, py_args, kwargs))
 644         goto err;
 645
 646     if (cache->function_type == PYGI_FUNCTION_TYPE_CCALLBACK)
 647         state.user_data = user_data;
 648
 649     if (!_invoke_marshal_in_args (&state, cache))
 650         goto err;
 651
 652     if (!_invoke_callable (&state, cache, info, function_ptr))
 653         goto err;
 654
 655     pygi_marshal_cleanup_args_from_py_marshal_success (&state, cache);
 656
 657     ret = _invoke_marshal_out_args (&state, cache);
 658     if (ret)
 659         pygi_marshal_cleanup_args_to_py_marshal_success (&state, cache);
 660 err:
 661     _invoke_state_clear (&state, cache);
 662     return ret;
 663 }
 664
 665 PyObject *
 666 _wrap_g_callable_info_invoke (PyGIBaseInfo *self, PyObject *py_args,
 667                               PyObject *kwargs)
 668 {
 669     if (self->cache == NULL) {
 670         self->cache = _pygi_callable_cache_new (self->info, FALSE);
 671         if (self->cache == NULL)
 672             return NULL;
 673     }
 674
 675     return pygi_callable_info_invoke (self->info, py_args, kwargs, self->cache, NULL, NULL);
 676 }