pygi-cache.c 42.9 KB
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/* -*- Mode: C; c-basic-offset: 4 -*-
 * vim: tabstop=4 shiftwidth=4 expandtab
 *
 * Copyright (C) 2011 John (J5) Palmieri <johnp@redhat.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 * USA
 */
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#include "pygi-info.h"
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#include "pygi-cache.h"
#include "pygi-argument.h"
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#include "pygi-type.h"
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#include <girepository.h>
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PyGIArgCache * _arg_cache_in_new_from_type_info (GITypeInfo *type_info,
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                                                 GIArgInfo *arg_info,
                                                 PyGIFunctionCache *function_cache,
                                                 GITypeTag type_tag,
                                                 GITransfer transfer,
                                                 GIDirection direction,
                                                 gint c_arg_index,
                                                 gint py_arg_index);
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/* cleanup */
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void
_pygi_arg_cache_free(PyGIArgCache *cache)
{
    if (cache == NULL)
        return;

    if (cache->arg_info != NULL)
        g_base_info_unref(cache->arg_info);
    if (cache->destroy_notify)
        cache->destroy_notify(cache);
    else
        g_slice_free(PyGIArgCache, cache);
}

static void
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_interface_cache_free_func (PyGIInterfaceCache *cache)
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{
    if (cache != NULL) {
        Py_XDECREF(cache->py_type);
        g_slice_free(PyGIInterfaceCache, cache);
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        if (cache->type_name != NULL)
            g_free(cache->type_name);
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    }
}

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static void
_hash_cache_free_func(PyGIHashCache *cache)
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{
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    if (cache != NULL) {
        _pygi_arg_cache_free(cache->key_cache);
        _pygi_arg_cache_free(cache->value_cache);
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        g_slice_free(PyGIHashCache, cache);
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    }
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}

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static void
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_sequence_cache_free_func(PyGISequenceCache *cache)
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{
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    if (cache != NULL) {
        _pygi_arg_cache_free(cache->item_cache);
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        g_slice_free(PyGISequenceCache, cache);
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    }
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}

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static void
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_callback_cache_free_func(PyGICallbackCache *cache)
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{
    if (cache != NULL)
        g_slice_free(PyGICallbackCache, cache);
}

void
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_pygi_function_cache_free(PyGIFunctionCache *cache)
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{
    int i;

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    if (cache == NULL)
        return;

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    g_slist_free(cache->out_args);
    for (i = 0; i < cache->n_args; i++) {
        PyGIArgCache *tmp = cache->args_cache[i];
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        _pygi_arg_cache_free(tmp);
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    }
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    if (cache->return_cache != NULL)
        _pygi_arg_cache_free(cache->return_cache);

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    g_slice_free1(cache->n_args * sizeof(PyGIArgCache *), cache->args_cache);
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    g_slice_free(PyGIFunctionCache, cache);
}

/* cache generation */
static inline PyGIFunctionCache *
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_function_cache_new_from_function_info(GIFunctionInfo *function_info)
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{
    PyGIFunctionCache *fc;
    GIFunctionInfoFlags flags;

    fc = g_slice_new0(PyGIFunctionCache);
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    fc->name = g_base_info_get_name((GIBaseInfo *)function_info);
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    flags = g_function_info_get_flags(function_info);
    fc->is_method = flags & GI_FUNCTION_IS_METHOD;
    fc->is_constructor = flags & GI_FUNCTION_IS_CONSTRUCTOR;
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    fc->n_args = g_callable_info_get_n_args ( (GICallableInfo *) function_info) + (fc->is_method ? 1: 0);
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    if (fc->n_args > 0)
        fc->args_cache = g_slice_alloc0(fc->n_args * sizeof(PyGIArgCache *));
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    return fc;
}

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static inline PyGIInterfaceCache *
_interface_cache_new_from_interface_info(GIInterfaceInfo *iface_info)
{
    PyGIInterfaceCache *ic;
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    ic = g_slice_new0(PyGIInterfaceCache);
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    ((PyGIArgCache *)ic)->destroy_notify = (GDestroyNotify)_interface_cache_free_func;
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    ic->g_type = g_registered_type_info_get_g_type ( (GIRegisteredTypeInfo *)iface_info);
    if (ic->g_type != G_TYPE_NONE) {
        ic->py_type = _pygi_type_get_from_g_type (ic->g_type);
    } else {
        /* FIXME: avoid passing GI infos to noncache API */
        ic->py_type = _pygi_type_import_by_gi_info ( (GIBaseInfo *) iface_info);
    }

    if (ic->py_type == NULL)
        return NULL;

    ic->type_name == _pygi_g_base_info_get_fullname(iface_info);
    return ic;
}

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static inline PyGISequenceCache *
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_sequence_cache_new_from_type_info(GITypeInfo *type_info,
                                   gint aux_offset)
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{
    PyGISequenceCache *sc;
    GITypeInfo *item_type_info;
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    GITypeTag item_type_tag;
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    sc = g_slice_new0(PyGISequenceCache);
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    ((PyGIArgCache *)sc)->destroy_notify = (GDestroyNotify)_sequence_cache_free_func;
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    sc->fixed_size = -1;
    sc->len_arg_index = -1;
    sc->is_zero_terminated = g_type_info_is_zero_terminated(type_info);
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    if (!sc->is_zero_terminated)
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        sc->fixed_size = g_type_info_get_array_fixed_size(type_info);
    if (sc->fixed_size < 0)
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        sc->len_arg_index = g_type_info_get_array_length (type_info) + aux_offset;
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    item_type_info = g_type_info_get_param_type (type_info, 0);
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    item_type_tag = g_type_info_get_tag (item_type_info);
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    /* FIXME: support out also */
    sc->item_cache = _arg_cache_in_new_from_type_info(item_type_info,
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                                                      NULL,
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                                                      NULL,
                                                      item_type_tag,
                                                      GI_TRANSFER_EVERYTHING,
                                                      GI_DIRECTION_IN,
                                                      0, 0);

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    if (sc->item_cache == NULL) {
        _pygi_arg_cache_free((PyGIArgCache *)sc);
        return NULL;
    }
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    sc->item_cache->type_tag = item_type_tag;
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    sc->item_size = _pygi_g_type_info_size(item_type_info);
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    g_base_info_unref( (GIBaseInfo *) item_type_info);
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    return sc;
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}
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static inline PyGIHashCache *
_hash_cache_new_from_type_info(GITypeInfo *type_info)
{
    PyGIHashCache *hc;
    GITypeInfo *key_type_info;
    GITypeTag key_type_tag;
    GITypeInfo *value_type_info;
    GITypeTag value_type_tag;

    hc = g_slice_new0(PyGIHashCache);
    ((PyGIArgCache *)hc)->destroy_notify = (GDestroyNotify)_hash_cache_free_func;
    key_type_info = g_type_info_get_param_type (type_info, 0);
    key_type_tag = g_type_info_get_tag (key_type_info);
    value_type_info = g_type_info_get_param_type (type_info, 1);
    value_type_tag = g_type_info_get_tag (value_type_info);

    hc->key_cache = _arg_cache_in_new_from_type_info(key_type_info,
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                                                     NULL,
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                                                     NULL,
                                                     key_type_tag,
                                                     GI_TRANSFER_EVERYTHING,
                                                     GI_DIRECTION_IN,
                                                     0, 0);

    if (hc->key_cache == NULL) {
        _pygi_arg_cache_free((PyGIArgCache *)hc);
        return NULL;
    }

    hc->value_cache = _arg_cache_in_new_from_type_info(value_type_info,
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                                                       NULL,
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                                                       NULL,
                                                       value_type_tag,
                                                       GI_TRANSFER_EVERYTHING,
                                                       GI_DIRECTION_IN,
                                                       0, 0);

    if (hc->value_cache == NULL) {
        _pygi_arg_cache_free((PyGIArgCache *)hc);
        return NULL;
    }

    hc->key_cache->type_tag = key_type_tag;
    hc->value_cache->type_tag = value_type_tag;

    g_base_info_unref( (GIBaseInfo *)key_type_info);
    g_base_info_unref( (GIBaseInfo *)value_type_info);

    return hc;
}
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static inline PyGICallbackCache *
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_callback_cache_new_from_arg_info(GIArgInfo *arg_info,
                                  gint aux_offset)
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{
   PyGICallbackCache *cc;

   cc = g_slice_new0(PyGICallbackCache);
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   cc->user_data_index = g_arg_info_get_closure(arg_info) + aux_offset;
   cc->destroy_notify_index = g_arg_info_get_destroy(arg_info) + aux_offset;
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   cc->scope = g_arg_info_get_scope(arg_info);

   return cc;
}

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static inline PyGIArgCache *
_arg_cache_new(void)
{
    return g_slice_new0(PyGIArgCache);
}
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/* process in args */

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static inline PyGIArgCache *
_arg_cache_new_for_in_void(void)
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{
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     PyGIArgCache *arg_cache = _arg_cache_new();
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     arg_cache->in_marshaller = _pygi_marshal_in_void;
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     return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_boolean(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_boolean;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_int8(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_int8;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_uint8(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_uint8;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_int16(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_int16;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_uint16(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_uint16;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_int32(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_int32;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_uint32(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_uint32;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_int64(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_int64;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_uint64(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_uint64;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_float(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_float;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_double(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_double;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_unichar(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_unichar;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_gtype(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_gtype;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_utf8(GITransfer transfer)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_utf8;
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    if (arg_cache->transfer == GI_TRANSFER_NOTHING)
        arg_cache->cleanup = g_free;

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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_filename(GITransfer transfer)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_filename;
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    if (arg_cache->transfer == GI_TRANSFER_NOTHING)
        arg_cache->cleanup = g_free;

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    return arg_cache;
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}

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static inline PyGIArgCache *
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_arg_cache_new_for_in_array(PyGIFunctionCache *function_cache,
                            GITypeInfo *type_info,
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                            GITransfer transfer)
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{
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    PyGISequenceCache *seq_cache = _sequence_cache_new_from_type_info(type_info,                                                                      (function_cache->is_method ? 1: 0));
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    PyGIArgCache *arg_cache = (PyGIArgCache *)seq_cache;

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    seq_cache->array_type = g_type_info_get_array_type(type_info);

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    if (seq_cache->len_arg_index >= 0) {
        PyGIArgCache *aux_cache = _arg_cache_new();
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        aux_cache->aux_type = PYGI_AUX_TYPE_IGNORE;
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        if (function_cache->args_cache[seq_cache->len_arg_index] != NULL) {
            PyGIArgCache *invalid_cache = function_cache->args_cache[seq_cache->len_arg_index];
            arg_cache->c_arg_index = invalid_cache->c_arg_index;
            _pygi_arg_cache_free(invalid_cache);
        }

        function_cache->args_cache[seq_cache->len_arg_index] = aux_cache;
    }

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    arg_cache->in_marshaller = _pygi_marshal_in_array;
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    /* arg_cache->cleanup = _pygi_cleanup_array; */
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_glist(GITypeInfo *type_info,
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                            GITransfer transfer)
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{
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    PyGIArgCache *arg_cache =
        (PyGIArgCache *)_sequence_cache_new_from_type_info(type_info, 0);
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    arg_cache->in_marshaller = _pygi_marshal_in_glist;
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    /* arg_cache->cleanup = */

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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_gslist(GITypeInfo *type_info,
                                       GITransfer transfer)
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{
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    PyGIArgCache *arg_cache =
        (PyGIArgCache *)_sequence_cache_new_from_type_info(type_info, 0);
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    arg_cache->in_marshaller = _pygi_marshal_in_gslist;
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    /* arg_cache->cleanup = */

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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_ghash(GITypeInfo *type_info)
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{
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    PyGIArgCache *arg_cache = (PyGIArgCache *)_hash_cache_new_from_type_info(type_info);
    arg_cache->in_marshaller = _pygi_marshal_in_ghash;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_gerror(void)
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{
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    PyGIArgCache *arg_cache = _arg_cache_new();
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    arg_cache->in_marshaller = _pygi_marshal_in_gerror;
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    arg_cache->aux_type = PYGI_AUX_TYPE_IGNORE;
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    return arg_cache;
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}

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static inline PyGIArgCache *
_arg_cache_new_for_in_interface_union(void)
{
    PyGIArgCache *arg_cache = NULL;
    /*arg_cache->in_marshaller = _pygi_marshal_in_inteface_union;*/
    PyErr_Format(PyExc_NotImplementedError,
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                 "Caching for In Interface Union is not fully implemented yet");
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    return arg_cache;
}

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static void
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_g_slice_free_gvalue_func(GValue *value) {
    g_slice_free(GValue, value);
}

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static inline PyGIArgCache *
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_arg_cache_new_for_in_interface_struct(GIInterfaceInfo *iface_info,
                                       GITransfer transfer)
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{
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    PyGIInterfaceCache *iface_cache = _interface_cache_new_from_interface_info(iface_info);
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    PyGIArgCache *arg_cache = (PyGIArgCache *)iface_cache;
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    iface_cache->is_foreign = g_struct_info_is_foreign( (GIStructInfo*)iface_info);
    arg_cache->in_marshaller = _pygi_marshal_in_interface_struct;
    if (iface_cache->g_type == G_TYPE_VALUE)
        arg_cache->cleanup = _g_slice_free_gvalue_func;
    if (iface_cache->g_type == G_TYPE_CLOSURE)
        arg_cache->cleanup = g_closure_unref;

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    return arg_cache;
}

static inline PyGIArgCache *
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_arg_cache_new_for_in_interface_object(GIInterfaceInfo *iface_info,
                                       GITransfer transfer)
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{
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    PyGIArgCache *arg_cache = (PyGIArgCache *)_interface_cache_new_from_interface_info(iface_info);
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    arg_cache->in_marshaller = _pygi_marshal_in_interface_object;
    if (transfer == GI_TRANSFER_EVERYTHING)
        arg_cache->cleanup = (GDestroyNotify)g_object_unref;

    return arg_cache;
}

static inline PyGIArgCache *
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_arg_cache_new_for_in_interface_boxed(GIInterfaceInfo *iface_info,
                                      GITransfer transfer)
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{
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    PyGIArgCache *arg_cache = (PyGIArgCache *)_interface_cache_new_from_interface_info(iface_info);
    arg_cache->in_marshaller = _pygi_marshal_in_interface_boxed;
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    return arg_cache;
}

static inline PyGIArgCache *
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_arg_cache_new_for_in_interface_callback(PyGIFunctionCache *function_cache,
                                         GIArgInfo *arg_info)
{
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    PyGICallbackCache *callback_cache = _callback_cache_new_from_arg_info(arg_info, function_cache->is_method ? 1: 0);
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    PyGIArgCache *arg_cache = (PyGIArgCache *)callback_cache;
    if (callback_cache->user_data_index >= 0) {
        PyGIArgCache *user_data_arg_cache = _arg_cache_new();
        user_data_arg_cache->aux_type = PYGI_AUX_TYPE_HAS_PYARG;
        function_cache->args_cache[callback_cache->user_data_index] = user_data_arg_cache;
    }
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    if (callback_cache->destroy_notify_index >= 0) {
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        PyGIArgCache *destroy_arg_cache = _arg_cache_new();
        destroy_arg_cache->aux_type = PYGI_AUX_TYPE_IGNORE;
        function_cache->args_cache[callback_cache->destroy_notify_index] = destroy_arg_cache;
    }
    arg_cache->in_marshaller = _pygi_marshal_in_interface_callback;
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    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_in_interface_enum(void)
{
    PyGIArgCache *arg_cache = NULL;
    /*arg_cache->in_marshaller = _pygi_marshal_in_enum;*/
    PyErr_Format(PyExc_NotImplementedError,
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                 "Caching for In Interface ENum is not fully implemented yet");
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    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_in_interface_flags(void)
{
    PyGIArgCache *arg_cache = NULL;
    /*arg_cache->in_marshaller = _pygi_marshal_in_flags;*/
    PyErr_Format(PyExc_NotImplementedError,
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                 "Caching for In Interface Flags is not fully implemented yet");
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    return arg_cache;
}

PyGIArgCache *
_arg_cache_in_new_from_interface_info (GIInterfaceInfo *iface_info,
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                                       GIArgInfo *arg_info,
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                                       PyGIFunctionCache *function_cache,
                                       GIInfoType info_type,
                                       GITransfer transfer,
                                       GIDirection direction,
                                       gint c_arg_index,
                                       gint py_arg_index)
{
    PyGIArgCache *arg_cache = NULL;

    switch (info_type) {
        case GI_INFO_TYPE_UNION:
            arg_cache = _arg_cache_new_for_in_interface_union();
            break;
        case GI_INFO_TYPE_STRUCT:
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            arg_cache = _arg_cache_new_for_in_interface_struct(iface_info,
                                                               transfer);
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            break;
        case GI_INFO_TYPE_OBJECT:
        case GI_INFO_TYPE_INTERFACE:
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            arg_cache = _arg_cache_new_for_in_interface_object(iface_info,
                                                               transfer);
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            break;
        case GI_INFO_TYPE_BOXED:
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            arg_cache = _arg_cache_new_for_in_interface_boxed(iface_info,
                                                              transfer);
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            break;
        case GI_INFO_TYPE_CALLBACK:
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            arg_cache = _arg_cache_new_for_in_interface_callback(function_cache,
                                                                 arg_info);
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            break;
        case GI_INFO_TYPE_ENUM:
            arg_cache = _arg_cache_new_for_in_interface_enum();
            break;
        case GI_INFO_TYPE_FLAGS:
            arg_cache = _arg_cache_new_for_in_interface_flags();
            break;
        default:
            g_assert_not_reached();
    }

    if (arg_cache != NULL) {
        arg_cache->direction = direction;
        arg_cache->transfer = transfer;
        arg_cache->type_tag = GI_TYPE_TAG_INTERFACE;
        arg_cache->py_arg_index = py_arg_index;
        arg_cache->c_arg_index = c_arg_index;
    }
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    return arg_cache;
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}

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/* process out args */

static inline PyGIArgCache *
_arg_cache_new_for_out_void(void)
{
     PyGIArgCache *arg_cache = _arg_cache_new();
     arg_cache->out_marshaller = _pygi_marshal_out_void;
     return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_boolean(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_boolean;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_int8(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_int8;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_uint8(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_uint8;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_int16(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_int16;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_uint16(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_uint16;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_int32(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_int32;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_uint32(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_uint32;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_int64(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_int64;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_uint64(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_uint64;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_float(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_float;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_double(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_double;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_unichar(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_unichar;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_gtype(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_gtype;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_utf8(GITransfer transfer)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_utf8;

    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_filename(GITransfer transfer)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_filename;

    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_array(GITypeInfo *type_info,
                            GITransfer transfer)
{
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    PyGIArgCache *arg_cache =
        (PyGIArgCache *)_sequence_cache_new_from_type_info(type_info, 0);
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    arg_cache->out_marshaller = _pygi_marshal_out_array;

    /* arg_cache->cleanup = _pygi_cleanup_array; */
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_glist(GITypeInfo *type_info,
                                      GITransfer transfer)
{
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    PyGIArgCache *arg_cache =
       (PyGIArgCache *)_sequence_cache_new_from_type_info(type_info, 0);
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    arg_cache->out_marshaller = _pygi_marshal_out_glist;
    /* arg_cache->cleanup = */

    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_gslist(GITypeInfo *type_info,
                                       GITransfer transfer)
{
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    PyGIArgCache *arg_cache =
        (PyGIArgCache *)_sequence_cache_new_from_type_info(type_info, 0);
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    arg_cache->out_marshaller = _pygi_marshal_out_gslist;
    /* arg_cache->cleanup = */

    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_ghash(GITypeInfo *type_info)
{
    PyGIArgCache *arg_cache = NULL;
    /*arg_cache->out_marshaller = _pygi_marshal_out_ghash;*/
    PyErr_Format(PyExc_NotImplementedError,
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                 "Caching for Out GHash is not fully implemented yet");
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    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_gerror(void)
{
    PyGIArgCache *arg_cache = _arg_cache_new();
    arg_cache->out_marshaller = _pygi_marshal_out_gerror;
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    arg_cache->aux_type = PYGI_AUX_TYPE_IGNORE;
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    return arg_cache;
}
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static inline PyGIArgCache *
_arg_cache_new_for_out_interface_struct(GIInterfaceInfo *iface_info,
                                        GITransfer transfer)
{
    PyErr_Format(PyExc_NotImplementedError,
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                 "Caching for Out Interface Struct is not fully implemented yet");
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    return FALSE;
    PyGIInterfaceCache *iface_cache = _interface_cache_new_from_interface_info(iface_info);
    PyGIArgCache *arg_cache = (PyGIArgCache *)iface_cache;
    iface_cache->is_foreign = g_struct_info_is_foreign( (GIStructInfo*)iface_info);
    arg_cache->in_marshaller = _pygi_marshal_in_interface_struct;
    if (iface_cache->g_type == G_TYPE_VALUE)
        arg_cache->cleanup = _g_slice_free_gvalue_func;
    if (iface_cache->g_type == G_TYPE_CLOSURE)
        arg_cache->cleanup = g_closure_unref;

    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_interface_object(GIInterfaceInfo *iface_info,
                                        GITransfer transfer)
{
    PyGIArgCache *arg_cache = (PyGIArgCache *)_interface_cache_new_from_interface_info(iface_info);
    arg_cache->out_marshaller = _pygi_marshal_out_interface_object;

    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_interface_boxed(GIInterfaceInfo *iface_info,
                                      GITransfer transfer)
{
    PyErr_Format(PyExc_NotImplementedError,
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                 "Caching for Out Interface Boxed is not fully implemented yet");
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    return FALSE;

    PyGIArgCache *arg_cache = (PyGIArgCache *)_interface_cache_new_from_interface_info(iface_info);
    arg_cache->in_marshaller = _pygi_marshal_in_interface_boxed;
    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_interface_callback(void)
{
    PyErr_Format(PyExc_NotImplementedError,
                 "Callback returns are not supported");
    return FALSE;
}
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static inline PyGIArgCache *
_arg_cache_new_for_out_interface_enum(void)
{
    PyGIArgCache *arg_cache = NULL;
    /*arg_cache->in_marshaller = _pygi_marshal_in_enum;*/
    PyErr_Format(PyExc_NotImplementedError,
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                 "Caching for Out Interface ENum is not fully implemented yet");
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    return arg_cache;
}

static inline PyGIArgCache *
_arg_cache_new_for_out_interface_union(void)
{
    PyGIArgCache *arg_cache = NULL;
    /*arg_cache->in_marshaller = _pygi_marshal_in_enum;*/
    PyErr_Format(PyExc_NotImplementedError,
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                 "Caching for Out Interface Unions is not fully implemented yet");
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    return arg_cache;
}
static inline PyGIArgCache *
_arg_cache_new_for_out_interface_flags(void)
{
    PyGIArgCache *arg_cache = NULL;
    /*arg_cache->in_marshaller = _pygi_marshal_in_flags;*/
    PyErr_Format(PyExc_NotImplementedError,
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                 "Caching for Out Interface Flags is not fully implemented yet");
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    return arg_cache;
}

PyGIArgCache *
_arg_cache_out_new_from_interface_info (GIInterfaceInfo *iface_info,
                                        PyGIFunctionCache *function_cache,
                                        GIInfoType info_type,
                                        GITransfer transfer,
                                        GIDirection direction,
                                        gint c_arg_index)
{
    PyGIArgCache *arg_cache = NULL;

    switch (info_type) {
        case GI_INFO_TYPE_UNION:
            arg_cache = _arg_cache_new_for_out_interface_union();
            break;
        case GI_INFO_TYPE_STRUCT:
            arg_cache = _arg_cache_new_for_out_interface_struct(iface_info,
                                                               transfer);
            break;
        case GI_INFO_TYPE_OBJECT:
        case GI_INFO_TYPE_INTERFACE:
            arg_cache = _arg_cache_new_for_out_interface_object(iface_info,
                                                                transfer);
            break;
        case GI_INFO_TYPE_BOXED:
            arg_cache = _arg_cache_new_for_out_interface_boxed(iface_info,
                                                               transfer);
            break;
        case GI_INFO_TYPE_CALLBACK:
            arg_cache = _arg_cache_new_for_out_interface_callback();
            break;
        case GI_INFO_TYPE_ENUM:
            arg_cache = _arg_cache_new_for_out_interface_enum();
            break;
        case GI_INFO_TYPE_FLAGS:
            arg_cache = _arg_cache_new_for_out_interface_flags();
            break;
        default:
            g_assert_not_reached();
    }

    if (arg_cache != NULL) {
        arg_cache->direction = direction;
        arg_cache->transfer = transfer;
        arg_cache->type_tag = GI_TYPE_TAG_INTERFACE;
        arg_cache->c_arg_index = c_arg_index;
    }

    return arg_cache;
}
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PyGIArgCache *
_arg_cache_out_new_from_type_info (GITypeInfo *type_info,
                                   PyGIFunctionCache *function_cache,
                                   GITypeTag type_tag,
                                   GITransfer transfer,
                                   GIDirection direction,
                                   gint c_arg_index)
{
    PyGIArgCache *arg_cache = NULL;

    switch (type_tag) {
       case GI_TYPE_TAG_VOID:
           arg_cache = _arg_cache_new_for_out_void();
           break;
       case GI_TYPE_TAG_BOOLEAN:
           arg_cache = _arg_cache_new_for_out_boolean();
           break;
       case GI_TYPE_TAG_INT8:
           arg_cache = _arg_cache_new_for_out_int8();
           break;
       case GI_TYPE_TAG_UINT8:
           arg_cache = _arg_cache_new_for_out_uint8();
           break;
       case GI_TYPE_TAG_INT16:
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           arg_cache = _arg_cache_new_for_out_int16();
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           break;
       case GI_TYPE_TAG_UINT16:
           arg_cache = _arg_cache_new_for_out_uint16();
           break;
       case GI_TYPE_TAG_INT32:
           arg_cache = _arg_cache_new_for_out_int32();
           break;
       case GI_TYPE_TAG_UINT32:
           arg_cache = _arg_cache_new_for_out_uint32();
           break;
       case GI_TYPE_TAG_INT64:
           arg_cache = _arg_cache_new_for_out_int64();
           break;
       case GI_TYPE_TAG_UINT64:
           arg_cache = _arg_cache_new_for_out_uint64();
           break;
       case GI_TYPE_TAG_FLOAT:
           arg_cache = _arg_cache_new_for_out_float();
           break;
       case GI_TYPE_TAG_DOUBLE:
           arg_cache = _arg_cache_new_for_out_double();
           break;
       case GI_TYPE_TAG_UNICHAR:
           arg_cache = _arg_cache_new_for_out_unichar();
           break;
       case GI_TYPE_TAG_GTYPE:
           arg_cache = _arg_cache_new_for_out_gtype();
           break;
       case GI_TYPE_TAG_UTF8:
           arg_cache = _arg_cache_new_for_out_utf8(transfer);
           break;
       case GI_TYPE_TAG_FILENAME:
           arg_cache = _arg_cache_new_for_out_filename(transfer);
           break;
       case GI_TYPE_TAG_ARRAY:
           arg_cache = _arg_cache_new_for_out_array(type_info,
                                                   transfer);
           break;
       case GI_TYPE_TAG_INTERFACE:
           {
               GIInterfaceInfo *interface_info = g_type_info_get_interface(type_info);
               GIInfoType info_type = g_base_info_get_type( (GIBaseInfo *) interface_info);
               arg_cache = _arg_cache_out_new_from_interface_info(interface_info,
                                                                 function_cache,
                                                                 info_type,
                                                                 transfer,
                                                                 direction,
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                                                                 c_arg_index);
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               g_base_info_unref( (GIBaseInfo *) interface_info);
               return arg_cache;
           }
       case GI_TYPE_TAG_GLIST:
           arg_cache = _arg_cache_new_for_out_glist(type_info,
                                                   transfer);
           break;
       case GI_TYPE_TAG_GSLIST:
           arg_cache = _arg_cache_new_for_out_gslist(type_info,
                                                    transfer);
           break;
       case GI_TYPE_TAG_GHASH:
           arg_cache = _arg_cache_new_for_out_ghash(type_info);
           break;
       case GI_TYPE_TAG_ERROR:
           arg_cache = _arg_cache_new_for_out_gerror();
           break;
    }

    if (arg_cache != NULL) {
        arg_cache->direction = direction;
        arg_cache->transfer = transfer;
        arg_cache->type_tag = type_tag;
        arg_cache->c_arg_index = c_arg_index;
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        arg_cache->is_pointer = g_type_info_is_pointer(type_info);
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    }

    return arg_cache;
}
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PyGIArgCache *
_arg_cache_in_new_from_type_info (GITypeInfo *type_info,
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                                  GIArgInfo *arg_info,
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                                  PyGIFunctionCache *function_cache,
                                  GITypeTag type_tag,
                                  GITransfer transfer,
                                  GIDirection direction,
                                  gint c_arg_index,
                                  gint py_arg_index)
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{
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    PyGIArgCache *arg_cache = NULL;
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    switch (type_tag) {
       case GI_TYPE_TAG_VOID:
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           arg_cache = _arg_cache_new_for_in_void();
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           break;
       case GI_TYPE_TAG_BOOLEAN:
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           arg_cache = _arg_cache_new_for_in_boolean();
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           break;
       case GI_TYPE_TAG_INT8:
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           arg_cache = _arg_cache_new_for_in_int8();
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           break;
       case GI_TYPE_TAG_UINT8:
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           arg_cache = _arg_cache_new_for_in_uint8();
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           break;
       case GI_TYPE_TAG_INT16:
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           arg_cache = _arg_cache_new_for_in_int16();
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           break;
       case GI_TYPE_TAG_UINT16:
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           arg_cache = _arg_cache_new_for_in_uint16();
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           break;
       case GI_TYPE_TAG_INT32:
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           arg_cache = _arg_cache_new_for_in_int32();
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           break;
       case GI_TYPE_TAG_UINT32:
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           arg_cache = _arg_cache_new_for_in_uint32();
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           break;
       case GI_TYPE_TAG_INT64:
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           arg_cache = _arg_cache_new_for_in_int64();
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           break;
       case GI_TYPE_TAG_UINT64:
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           arg_cache = _arg_cache_new_for_in_uint64();
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           break;
       case GI_TYPE_TAG_FLOAT:
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           arg_cache = _arg_cache_new_for_in_float();
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           break;
       case GI_TYPE_TAG_DOUBLE: