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     pyg_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     pyg_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  * @function_name: the name of the function being called. Used for error messages.
 140  * @arg_name_list: a list of the string names for each argument. The length
 141  *                 of this list is the number of required arguments for the
 142  *                 function. If an argument has no name, NULL is put in its
 143  *                 position in the list.
 144  * @py_args: the tuple of positional arguments. A referece is stolen, and this
 145              tuple will be either decreffed or returned as is.
 146  * @py_kwargs: the dict of keyword arguments to be merged with py_args.
 147  *             A reference is borrowed.
 148  *
 149  * Returns: The py_args and py_kwargs combined into one tuple.
 150  */
 151 static PyObject *
 152 _py_args_combine_and_check_length (const gchar *function_name,
 153                                    GSList      *arg_name_list,
 154                                    GHashTable  *arg_name_hash,
 155                                    PyObject    *py_args,
 156                                    PyObject    *py_kwargs)
 157 {
 158     PyObject *combined_py_args = NULL;
 159     Py_ssize_t n_py_args, n_py_kwargs, i;
 160     guint n_expected_args;
 161     GSList *l;
 162
 163     n_py_args = PyTuple_GET_SIZE (py_args);
 164     if (py_kwargs == NULL)
 165         n_py_kwargs = 0;
 166     else
 167         n_py_kwargs = PyDict_Size (py_kwargs);
 168
 169     n_expected_args = g_slist_length (arg_name_list);
 170     if (n_py_kwargs == 0 && n_py_args == n_expected_args) {
 171         return py_args;
 172     }
 173
 174     if (n_expected_args < n_py_args) {
 175         PyErr_Format (PyExc_TypeError,
 176                       "%.200s() takes exactly %d %sargument%s (%zd given)",
 177                       function_name,
 178                       n_expected_args,
 179                       n_py_kwargs > 0 ? "non-keyword " : "",
 180                       n_expected_args == 1 ? "" : "s",
 181                       n_py_args);
 182
 183         Py_DECREF (py_args);
 184         return NULL;
 185     }
 186
 187     if (n_py_kwargs > 0 && !_check_for_unexpected_kwargs (function_name,
 188                                                           arg_name_hash,
 189                                                           py_kwargs)) {
 190         Py_DECREF (py_args);
 191         return NULL;
 192     }
 193
 194     /* will hold arguments from both py_args and py_kwargs
 195      * when they are combined into a single tuple */
 196     combined_py_args = PyTuple_New (n_expected_args);
 197
 198     for (i = 0; i < n_py_args; i++) {
 199         PyObject *item = PyTuple_GET_ITEM (py_args, i);
 200         Py_INCREF (item);
 201         PyTuple_SET_ITEM (combined_py_args, i, item);
 202     }
 203
 204     Py_CLEAR(py_args);
 205
 206     for (i = 0, l = arg_name_list; i < n_expected_args && l; i++, l = l->next) {
 207         PyObject *py_arg_item, *kw_arg_item = NULL;
 208         const gchar *arg_name = l->data;
 209
 210         if (n_py_kwargs > 0 && arg_name != NULL) {
 211             /* NULL means this argument has no keyword name */
 212             /* ex. the first argument to a method or constructor */
 213             kw_arg_item = PyDict_GetItemString (py_kwargs, arg_name);
 214         }
 215         py_arg_item = PyTuple_GET_ITEM (combined_py_args, i);
 216
 217         if (kw_arg_item != NULL && py_arg_item == NULL) {
 218             Py_INCREF (kw_arg_item);
 219             PyTuple_SET_ITEM (combined_py_args, i, kw_arg_item);
 220
 221         } else if (kw_arg_item == NULL && py_arg_item == NULL) {
 222             PyErr_Format (PyExc_TypeError,
 223                           "%.200s() takes exactly %d %sargument%s (%zd given)",
 224                           function_name,
 225                           n_expected_args,
 226                           n_py_kwargs > 0 ? "non-keyword " : "",
 227                           n_expected_args == 1 ? "" : "s",
 228                           n_py_args);
 229
 230             Py_DECREF (combined_py_args);
 231             return NULL;
 232
 233         } else if (kw_arg_item != NULL && py_arg_item != NULL) {
 234             PyErr_Format (PyExc_TypeError,
 235                           "%.200s() got multiple values for keyword argument '%.200s'",
 236                           function_name,
 237                           arg_name);
 238
 239             Py_DECREF (combined_py_args);
 240             return NULL;
 241         }
 242     }
 243
 244     return combined_py_args;
 245 }
 246
 247 static inline gboolean
 248 _invoke_state_init_from_callable_cache (PyGIInvokeState *state,
 249                                         PyGICallableCache *cache,
 250                                         PyObject *py_args,
 251                                         PyObject *kwargs)
 252 {
 253     state->implementor_gtype = 0;
 254
 255     /* TODO: We don't use the class parameter sent in by  the structure
 256      * so we remove it from the py_args tuple but we can keep it
 257      * around if we want to call actual gobject constructors
 258      * in the future instead of calling g_object_new
 259      */
 260     if (cache->function_type == PYGI_FUNCTION_TYPE_CONSTRUCTOR) {
 261         PyObject *constructor_class;
 262         constructor_class = PyTuple_GetItem (py_args, 0);
 263
 264         if (constructor_class == NULL) {
 265             PyErr_Clear ();
 266             PyErr_Format (PyExc_TypeError,
 267                           "Constructors require the class to be passed in as an argument, "
 268                           "No arguments passed to the %s constructor.",
 269                           cache->name);
 270
 271             return FALSE;
 272         }
 273     } else if (cache->function_type == PYGI_FUNCTION_TYPE_VFUNC) {
 274         PyObject *py_gtype;
 275         py_gtype = PyTuple_GetItem (py_args, 0);
 276         if (py_gtype == NULL) {
 277             PyErr_SetString (PyExc_TypeError,
 278                              "need the GType of the implementor class");
 279             return FALSE;
 280         }
 281
 282         state->implementor_gtype = pyg_type_from_object (py_gtype);
 283
 284         if (state->implementor_gtype == 0)
 285             return FALSE;
 286     }
 287
 288     if  (cache->function_type == PYGI_FUNCTION_TYPE_CONSTRUCTOR ||
 289             cache->function_type == PYGI_FUNCTION_TYPE_VFUNC) {
 290
 291         /* we could optimize this by using offsets instead of modifying the tuple but it makes the
 292          * code more error prone and confusing so don't do that unless profiling shows
 293          * significant gain
 294          */
 295         state->py_in_args = PyTuple_GetSlice (py_args, 1, PyTuple_Size (py_args));
 296     } else {
 297         state->py_in_args = py_args;
 298         Py_INCREF (state->py_in_args);
 299     }
 300
 301     state->py_in_args = _py_args_combine_and_check_length (cache->name,
 302                                                            cache->arg_name_list,
 303                                                            cache->arg_name_hash,
 304                                                            state->py_in_args,
 305                                                            kwargs);
 306
 307     if (state->py_in_args == NULL) {
 308         return FALSE;
 309     }
 310     state->n_py_in_args = PyTuple_Size (state->py_in_args);
 311
 312     state->args = g_slice_alloc0 (cache->n_args * sizeof (GIArgument *));
 313     if (state->args == NULL && cache->n_args != 0) {
 314         PyErr_NoMemory();
 315         return FALSE;
 316     }
 317
 318     state->in_args = g_slice_alloc0 (cache->n_from_py_args * sizeof(GIArgument));
 319     if (state->in_args == NULL && cache->n_from_py_args != 0) {
 320         PyErr_NoMemory ();
 321         return FALSE;
 322     }
 323
 324     state->out_values = g_slice_alloc0 (cache->n_to_py_args * sizeof(GIArgument));
 325     if (state->out_values == NULL && cache->n_to_py_args != 0) {
 326         PyErr_NoMemory ();
 327         return FALSE;
 328     }
 329
 330     state->out_args = g_slice_alloc0 (cache->n_to_py_args * sizeof(GIArgument));
 331     if (state->out_args == NULL && cache->n_to_py_args != 0) {
 332         PyErr_NoMemory ();
 333         return FALSE;
 334     }
 335
 336     state->error = NULL;
 337
 338     return TRUE;
 339 }
 340
 341 static inline void
 342 _invoke_state_clear (PyGIInvokeState *state, PyGICallableCache *cache)
 343 {
 344     g_slice_free1 (cache->n_args * sizeof(GIArgument *), state->args);
 345     g_slice_free1 (cache->n_from_py_args * sizeof(GIArgument), state->in_args);
 346     g_slice_free1 (cache->n_to_py_args * sizeof(GIArgument), state->out_args);
 347     g_slice_free1 (cache->n_to_py_args * sizeof(GIArgument), state->out_values);
 348
 349     Py_XDECREF (state->py_in_args);
 350 }
 351
 352 static gboolean _caller_alloc (PyGIInvokeState *state,
 353                                PyGIArgCache *arg_cache,
 354                                gssize arg_count,
 355                                gssize out_count)
 356 {
 357     PyGIInterfaceCache *iface_cache;
 358
 359     g_assert (arg_cache->type_tag == GI_TYPE_TAG_INTERFACE);
 360
 361     iface_cache = (PyGIInterfaceCache *)arg_cache;
 362
 363     state->out_args[out_count].v_pointer = NULL;
 364     state->args[arg_count] = &state->out_args[out_count];
 365     if (iface_cache->g_type == G_TYPE_BOXED) {
 366         state->args[arg_count]->v_pointer =
 367             _pygi_boxed_alloc (iface_cache->interface_info, NULL);
 368     } else if (iface_cache->g_type == G_TYPE_VALUE) {
 369         state->args[arg_count]->v_pointer = g_slice_new0 (GValue);
 370     } else if (iface_cache->is_foreign) {
 371         PyObject *foreign_struct =
 372             pygi_struct_foreign_convert_from_g_argument (
 373                 iface_cache->interface_info,
 374                 NULL);
 375
 376             pygi_struct_foreign_convert_to_g_argument (foreign_struct,
 377                                                        iface_cache->interface_info,
 378                                                        GI_TRANSFER_EVERYTHING,
 379                                                        state->args[arg_count]);
 380     } else {
 381             gssize size = g_struct_info_get_size(
 382                 (GIStructInfo *)iface_cache->interface_info);
 383             state->args[arg_count]->v_pointer = g_malloc0 (size);
 384     }
 385
 386     if (state->args[arg_count]->v_pointer == NULL)
 387         return FALSE;
 388
 389
 390     return TRUE;
 391 }
 392
 393 static inline gboolean
 394 _invoke_marshal_in_args (PyGIInvokeState *state, PyGICallableCache *cache)
 395 {
 396     gssize i, in_count, out_count;
 397     in_count = 0;
 398     out_count = 0;
 399
 400     if (state->n_py_in_args > cache->n_py_args) {
 401         PyErr_Format (PyExc_TypeError,
 402                       "%s() takes exactly %zd argument(s) (%zd given)",
 403                       cache->name,
 404                       cache->n_py_args,
 405                       state->n_py_in_args);
 406         return FALSE;
 407     }
 408
 409     for (i = 0; i < cache->n_args; i++) {
 410         GIArgument *c_arg;
 411         PyGIArgCache *arg_cache = cache->args_cache[i];
 412         PyObject *py_arg = NULL;
 413
 414         switch (arg_cache->direction) {
 415             case PYGI_DIRECTION_FROM_PYTHON:
 416                 state->args[i] = &(state->in_args[in_count]);
 417                 in_count++;
 418
 419                 if (arg_cache->meta_type == PYGI_META_ARG_TYPE_CLOSURE) {
 420                     state->args[i]->v_pointer = state->user_data;
 421                     continue;
 422                 } else if (arg_cache->meta_type != PYGI_META_ARG_TYPE_PARENT)
 423                     continue;
 424
 425                 if (arg_cache->py_arg_index >= state->n_py_in_args) {
 426                     PyErr_Format (PyExc_TypeError,
 427                                   "%s() takes exactly %zd argument(s) (%zd given)",
 428                                    cache->name,
 429                                    cache->n_py_args,
 430                                    state->n_py_in_args);
 431
 432                     /* clean up all of the args we have already marshalled,
 433                      * since invoke will not be called
 434                      */
 435                     pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 436                                                                       cache,
 437                                                                       i - 1);
 438                     return FALSE;
 439                 }
 440
 441                 py_arg =
 442                     PyTuple_GET_ITEM (state->py_in_args,
 443                                       arg_cache->py_arg_index);
 444
 445                 break;
 446             case PYGI_DIRECTION_BIDIRECTIONAL:
 447                 /* this will be filled in if it is an child value */
 448                 if (state->in_args[in_count].v_pointer != NULL)
 449                     state->out_values[out_count] = state->in_args[in_count];
 450
 451                 state->in_args[in_count].v_pointer = &state->out_values[out_count];
 452                 in_count++;
 453
 454                 if (arg_cache->meta_type != PYGI_META_ARG_TYPE_CHILD) {
 455                     if (arg_cache->py_arg_index >= state->n_py_in_args) {
 456                         PyErr_Format (PyExc_TypeError,
 457                                       "%s() takes exactly %zd argument(s) (%zd given)",
 458                                        cache->name,
 459                                        cache->n_py_args,
 460                                        state->n_py_in_args);
 461                         pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 462                                                                           cache,
 463                                                                           i - 1);
 464                         return FALSE;
 465                     }
 466
 467                     py_arg =
 468                         PyTuple_GET_ITEM (state->py_in_args,
 469                                           arg_cache->py_arg_index);
 470                 }
 471             case PYGI_DIRECTION_TO_PYTHON:
 472                 if (arg_cache->is_caller_allocates) {
 473                     if (!_caller_alloc (state, arg_cache, i, out_count)) {
 474                         PyErr_Format (PyExc_TypeError,
 475                                       "Could not caller allocate argument %zd of callable %s",
 476                                       i, cache->name);
 477                         pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 478                                                                           cache,
 479                                                                           i - 1);
 480                         return FALSE;
 481                     }
 482                 } else {
 483                     state->out_args[out_count].v_pointer = &state->out_values[out_count];
 484                     state->args[i] = &state->out_values[out_count];
 485                 }
 486                 out_count++;
 487                 break;
 488         }
 489
 490         c_arg = state->args[i];
 491         if (arg_cache->from_py_marshaller != NULL) {
 492             if (!arg_cache->allow_none && py_arg == Py_None) {
 493                 PyErr_Format (PyExc_TypeError,
 494                               "Argument %zd does not allow None as a value",
 495                               i);
 496
 497                  pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 498                                                                    cache,
 499                                                                    i - 1);
 500                  return FALSE;
 501             }
 502             gboolean success = arg_cache->from_py_marshaller (state,
 503                                                               cache,
 504                                                               arg_cache,
 505                                                               py_arg,
 506                                                               c_arg);
 507             if (!success) {
 508                 pygi_marshal_cleanup_args_from_py_parameter_fail (state,
 509                                                                   cache,
 510                                                                   i - 1);
 511                 return FALSE;
 512             }
 513
 514         }
 515
 516     }
 517
 518     return TRUE;
 519 }
 520
 521 static inline PyObject *
 522 _invoke_marshal_out_args (PyGIInvokeState *state, PyGICallableCache *cache)
 523 {
 524     PyObject *py_out = NULL;
 525     PyObject *py_return = NULL;
 526     gssize total_out_args = cache->n_to_py_args;
 527     gboolean has_return = FALSE;
 528
 529     if (cache->return_cache) {
 530         if (!cache->return_cache->is_skipped) {
 531             if (cache->function_type == PYGI_FUNCTION_TYPE_CONSTRUCTOR) {
 532                 if (state->return_arg.v_pointer == NULL) {
 533                     PyErr_SetString (PyExc_TypeError, "constructor returned NULL");
 534                     pygi_marshal_cleanup_args_return_fail (state,
 535                                                        cache);
 536                     return NULL;
 537                 }
 538             }
 539
 540             py_return = cache->return_cache->to_py_marshaller ( state,
 541                                                                 cache,
 542                                                                 cache->return_cache,
 543                                                                &state->return_arg);
 544             if (py_return == NULL) {
 545                 pygi_marshal_cleanup_args_return_fail (state,
 546                                                        cache);
 547                 return NULL;
 548             }
 549
 550
 551             if (cache->return_cache->type_tag != GI_TYPE_TAG_VOID) {
 552                 total_out_args++;
 553                 has_return = TRUE;
 554             }
 555         } else {
 556             if (cache->return_cache->transfer == GI_TRANSFER_EVERYTHING) {
 557                 PyGIMarshalCleanupFunc to_py_cleanup =
 558                     cache->return_cache->to_py_cleanup;
 559
 560                 if (to_py_cleanup != NULL)
 561                     to_py_cleanup ( state,
 562                                     cache->return_cache,
 563                                    &state->return_arg,
 564                                     FALSE);
 565             }
 566         }
 567     }
 568
 569     total_out_args -= cache->n_to_py_child_args;
 570
 571     if (cache->n_to_py_args - cache->n_to_py_child_args  == 0) {
 572         if (cache->return_cache->is_skipped && state->error == NULL) {
 573             /* we skip the return value and have no (out) arguments to return,
 574              * so py_return should be NULL. But we must not return NULL,
 575              * otherwise Python will expect an exception.
 576              */
 577             g_assert (py_return == NULL);
 578             Py_INCREF(Py_None);
 579             py_return = Py_None;
 580         }
 581
 582         py_out = py_return;
 583     } else if (total_out_args == 1) {
 584         /* if we get here there is one out arg an no return */
 585         PyGIArgCache *arg_cache = (PyGIArgCache *)cache->to_py_args->data;
 586         py_out = arg_cache->to_py_marshaller (state,
 587                                               cache,
 588                                               arg_cache,
 589                                               state->args[arg_cache->c_arg_index]);
 590         if (py_out == NULL) {
 591             pygi_marshal_cleanup_args_to_py_parameter_fail (state,
 592                                                             cache,
 593                                                             0);
 594             return NULL;
 595         }
 596
 597     } else {
 598         gssize py_arg_index = 0;
 599         GSList *cache_item = cache->to_py_args;
 600         /* return a tuple */
 601         py_out = PyTuple_New (total_out_args);
 602         if (has_return) {
 603             PyTuple_SET_ITEM (py_out, py_arg_index, py_return);
 604             py_arg_index++;
 605         }
 606
 607         for(; py_arg_index < total_out_args; py_arg_index++) {
 608             PyGIArgCache *arg_cache = (PyGIArgCache *)cache_item->data;
 609             PyObject *py_obj = arg_cache->to_py_marshaller (state,
 610                                                             cache,
 611                                                             arg_cache,
 612                                                             state->args[arg_cache->c_arg_index]);
 613
 614             if (py_obj == NULL) {
 615                 if (has_return)
 616                     py_arg_index--;
 617
 618                 pygi_marshal_cleanup_args_to_py_parameter_fail (state,
 619                                                                 cache,
 620                                                                 py_arg_index);
 621                 Py_DECREF (py_out);
 622                 return NULL;
 623             }
 624
 625             PyTuple_SET_ITEM (py_out, py_arg_index, py_obj);
 626             cache_item = cache_item->next;
 627         }
 628     }
 629     return py_out;
 630 }
 631
 632 PyObject *
 633 pygi_callable_info_invoke (GIBaseInfo *info, PyObject *py_args,
 634                            PyObject *kwargs, PyGICallableCache *cache,
 635                            GCallback function_ptr, gpointer user_data)
 636 {
 637     PyGIInvokeState state = { 0, };
 638     PyObject *ret = NULL;
 639
 640     if (!_invoke_state_init_from_callable_cache (&state, cache, py_args, kwargs))
 641         goto err;
 642
 643     if (cache->function_type == PYGI_FUNCTION_TYPE_CCALLBACK)
 644         state.user_data = user_data;
 645
 646     if (!_invoke_marshal_in_args (&state, cache))
 647         goto err;
 648
 649     if (!_invoke_callable (&state, cache, info, function_ptr))
 650         goto err;
 651
 652     pygi_marshal_cleanup_args_from_py_marshal_success (&state, cache);
 653
 654     ret = _invoke_marshal_out_args (&state, cache);
 655     if (ret)
 656         pygi_marshal_cleanup_args_to_py_marshal_success (&state, cache);
 657 err:
 658     _invoke_state_clear (&state, cache);
 659     return ret;
 660 }
 661
 662 PyObject *
 663 _wrap_g_callable_info_invoke (PyGIBaseInfo *self, PyObject *py_args,
 664                               PyObject *kwargs)
 665 {
 666     if (self->cache == NULL) {
 667         self->cache = _pygi_callable_cache_new (self->info, FALSE);
 668         if (self->cache == NULL)
 669             return NULL;
 670     }
 671
 672     return pygi_callable_info_invoke (self->info, py_args, kwargs, self->cache, NULL, NULL);
 673 }