| /* GIO - GLib Input, Output and Streaming Library |
| * |
| * Copyright (C) 2006-2007 Red Hat, Inc. |
| * |
| * 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, see <http://www.gnu.org/licenses/>. |
| * |
| * Author: Alexander Larsson <alexl@redhat.com> |
| */ |
| |
| #include "config.h" |
| #include "gfileenumerator.h" |
| #include "gfile.h" |
| #include "gioscheduler.h" |
| #include "gasyncresult.h" |
| #include "gasynchelper.h" |
| #include "gioerror.h" |
| #include "glibintl.h" |
| |
| struct _GFileEnumeratorPrivate { |
| /* TODO: Should be public for subclasses? */ |
| GFile *container; |
| guint closed : 1; |
| guint pending : 1; |
| GAsyncReadyCallback outstanding_callback; |
| GError *outstanding_error; |
| }; |
| |
| /** |
| * SECTION:gfileenumerator |
| * @short_description: Enumerated Files Routines |
| * @include: gio/gio.h |
| * |
| * #GFileEnumerator allows you to operate on a set of #GFiles, |
| * returning a #GFileInfo structure for each file enumerated (e.g. |
| * g_file_enumerate_children() will return a #GFileEnumerator for each |
| * of the children within a directory). |
| * |
| * To get the next file's information from a #GFileEnumerator, use |
| * g_file_enumerator_next_file() or its asynchronous version, |
| * g_file_enumerator_next_files_async(). Note that the asynchronous |
| * version will return a list of #GFileInfos, whereas the |
| * synchronous will only return the next file in the enumerator. |
| * |
| * The ordering of returned files is unspecified for non-Unix |
| * platforms; for more information, see g_dir_read_name(). On Unix, |
| * when operating on local files, returned files will be sorted by |
| * inode number. Effectively you can assume that the ordering of |
| * returned files will be stable between successive calls (and |
| * applications) assuming the directory is unchanged. |
| * |
| * If your application needs a specific ordering, such as by name or |
| * modification time, you will have to implement that in your |
| * application code. |
| * |
| * To close a #GFileEnumerator, use g_file_enumerator_close(), or |
| * its asynchronous version, g_file_enumerator_close_async(). Once |
| * a #GFileEnumerator is closed, no further actions may be performed |
| * on it, and it should be freed with g_object_unref(). |
| * |
| **/ |
| |
| G_DEFINE_TYPE_WITH_PRIVATE (GFileEnumerator, g_file_enumerator, G_TYPE_OBJECT) |
| |
| enum { |
| PROP_0, |
| PROP_CONTAINER |
| }; |
| |
| static void g_file_enumerator_real_next_files_async (GFileEnumerator *enumerator, |
| int num_files, |
| int io_priority, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data); |
| static GList * g_file_enumerator_real_next_files_finish (GFileEnumerator *enumerator, |
| GAsyncResult *res, |
| GError **error); |
| static void g_file_enumerator_real_close_async (GFileEnumerator *enumerator, |
| int io_priority, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data); |
| static gboolean g_file_enumerator_real_close_finish (GFileEnumerator *enumerator, |
| GAsyncResult *res, |
| GError **error); |
| |
| static void |
| g_file_enumerator_set_property (GObject *object, |
| guint property_id, |
| const GValue *value, |
| GParamSpec *pspec) |
| { |
| GFileEnumerator *enumerator; |
| |
| enumerator = G_FILE_ENUMERATOR (object); |
| |
| switch (property_id) { |
| case PROP_CONTAINER: |
| enumerator->priv->container = g_value_dup_object (value); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| g_file_enumerator_dispose (GObject *object) |
| { |
| GFileEnumerator *enumerator; |
| |
| enumerator = G_FILE_ENUMERATOR (object); |
| |
| if (enumerator->priv->container) { |
| g_object_unref (enumerator->priv->container); |
| enumerator->priv->container = NULL; |
| } |
| |
| G_OBJECT_CLASS (g_file_enumerator_parent_class)->dispose (object); |
| } |
| |
| static void |
| g_file_enumerator_finalize (GObject *object) |
| { |
| GFileEnumerator *enumerator; |
| |
| enumerator = G_FILE_ENUMERATOR (object); |
| |
| if (!enumerator->priv->closed) |
| g_file_enumerator_close (enumerator, NULL, NULL); |
| |
| G_OBJECT_CLASS (g_file_enumerator_parent_class)->finalize (object); |
| } |
| |
| static void |
| g_file_enumerator_class_init (GFileEnumeratorClass *klass) |
| { |
| GObjectClass *gobject_class = G_OBJECT_CLASS (klass); |
| |
| gobject_class->set_property = g_file_enumerator_set_property; |
| gobject_class->dispose = g_file_enumerator_dispose; |
| gobject_class->finalize = g_file_enumerator_finalize; |
| |
| klass->next_files_async = g_file_enumerator_real_next_files_async; |
| klass->next_files_finish = g_file_enumerator_real_next_files_finish; |
| klass->close_async = g_file_enumerator_real_close_async; |
| klass->close_finish = g_file_enumerator_real_close_finish; |
| |
| g_object_class_install_property |
| (gobject_class, PROP_CONTAINER, |
| g_param_spec_object ("container", P_("Container"), |
| P_("The container that is being enumerated"), |
| G_TYPE_FILE, |
| G_PARAM_WRITABLE | |
| G_PARAM_CONSTRUCT_ONLY | |
| G_PARAM_STATIC_STRINGS)); |
| } |
| |
| static void |
| g_file_enumerator_init (GFileEnumerator *enumerator) |
| { |
| enumerator->priv = g_file_enumerator_get_instance_private (enumerator); |
| } |
| |
| /** |
| * g_file_enumerator_next_file: |
| * @enumerator: a #GFileEnumerator. |
| * @cancellable: (nullable): optional #GCancellable object, %NULL to ignore. |
| * @error: location to store the error occurring, or %NULL to ignore |
| * |
| * Returns information for the next file in the enumerated object. |
| * Will block until the information is available. The #GFileInfo |
| * returned from this function will contain attributes that match the |
| * attribute string that was passed when the #GFileEnumerator was created. |
| * |
| * See the documentation of #GFileEnumerator for information about the |
| * order of returned files. |
| * |
| * On error, returns %NULL and sets @error to the error. If the |
| * enumerator is at the end, %NULL will be returned and @error will |
| * be unset. |
| * |
| * Returns: (nullable) (transfer full): A #GFileInfo or %NULL on error |
| * or end of enumerator. Free the returned object with |
| * g_object_unref() when no longer needed. |
| **/ |
| GFileInfo * |
| g_file_enumerator_next_file (GFileEnumerator *enumerator, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GFileEnumeratorClass *class; |
| GFileInfo *info; |
| |
| g_return_val_if_fail (G_IS_FILE_ENUMERATOR (enumerator), NULL); |
| g_return_val_if_fail (enumerator != NULL, NULL); |
| |
| if (enumerator->priv->closed) |
| { |
| g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED, |
| _("Enumerator is closed")); |
| return NULL; |
| } |
| |
| if (enumerator->priv->pending) |
| { |
| g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_PENDING, |
| _("File enumerator has outstanding operation")); |
| return NULL; |
| } |
| |
| if (enumerator->priv->outstanding_error) |
| { |
| g_propagate_error (error, enumerator->priv->outstanding_error); |
| enumerator->priv->outstanding_error = NULL; |
| return NULL; |
| } |
| |
| class = G_FILE_ENUMERATOR_GET_CLASS (enumerator); |
| |
| if (cancellable) |
| g_cancellable_push_current (cancellable); |
| |
| enumerator->priv->pending = TRUE; |
| info = (* class->next_file) (enumerator, cancellable, error); |
| enumerator->priv->pending = FALSE; |
| |
| if (cancellable) |
| g_cancellable_pop_current (cancellable); |
| |
| return info; |
| } |
| |
| /** |
| * g_file_enumerator_close: |
| * @enumerator: a #GFileEnumerator. |
| * @cancellable: (nullable): optional #GCancellable object, %NULL to ignore. |
| * @error: location to store the error occurring, or %NULL to ignore |
| * |
| * Releases all resources used by this enumerator, making the |
| * enumerator return %G_IO_ERROR_CLOSED on all calls. |
| * |
| * This will be automatically called when the last reference |
| * is dropped, but you might want to call this function to make |
| * sure resources are released as early as possible. |
| * |
| * Returns: #TRUE on success or #FALSE on error. |
| **/ |
| gboolean |
| g_file_enumerator_close (GFileEnumerator *enumerator, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GFileEnumeratorClass *class; |
| |
| g_return_val_if_fail (G_IS_FILE_ENUMERATOR (enumerator), FALSE); |
| g_return_val_if_fail (enumerator != NULL, FALSE); |
| |
| class = G_FILE_ENUMERATOR_GET_CLASS (enumerator); |
| |
| if (enumerator->priv->closed) |
| return TRUE; |
| |
| if (enumerator->priv->pending) |
| { |
| g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_PENDING, |
| _("File enumerator has outstanding operation")); |
| return FALSE; |
| } |
| |
| if (cancellable) |
| g_cancellable_push_current (cancellable); |
| |
| enumerator->priv->pending = TRUE; |
| (* class->close_fn) (enumerator, cancellable, error); |
| enumerator->priv->pending = FALSE; |
| enumerator->priv->closed = TRUE; |
| |
| if (cancellable) |
| g_cancellable_pop_current (cancellable); |
| |
| return TRUE; |
| } |
| |
| static void |
| next_async_callback_wrapper (GObject *source_object, |
| GAsyncResult *res, |
| gpointer user_data) |
| { |
| GFileEnumerator *enumerator = G_FILE_ENUMERATOR (source_object); |
| |
| enumerator->priv->pending = FALSE; |
| if (enumerator->priv->outstanding_callback) |
| (*enumerator->priv->outstanding_callback) (source_object, res, user_data); |
| g_object_unref (enumerator); |
| } |
| |
| /** |
| * g_file_enumerator_next_files_async: |
| * @enumerator: a #GFileEnumerator. |
| * @num_files: the number of file info objects to request |
| * @io_priority: the [I/O priority][io-priority] of the request |
| * @cancellable: (nullable): optional #GCancellable object, %NULL to ignore. |
| * @callback: (scope async): a #GAsyncReadyCallback to call when the request is satisfied |
| * @user_data: (closure): the data to pass to callback function |
| * |
| * Request information for a number of files from the enumerator asynchronously. |
| * When all i/o for the operation is finished the @callback will be called with |
| * the requested information. |
| * |
| * See the documentation of #GFileEnumerator for information about the |
| * order of returned files. |
| * |
| * The callback can be called with less than @num_files files in case of error |
| * or at the end of the enumerator. In case of a partial error the callback will |
| * be called with any succeeding items and no error, and on the next request the |
| * error will be reported. If a request is cancelled the callback will be called |
| * with %G_IO_ERROR_CANCELLED. |
| * |
| * During an async request no other sync and async calls are allowed, and will |
| * result in %G_IO_ERROR_PENDING errors. |
| * |
| * Any outstanding i/o request with higher priority (lower numerical value) will |
| * be executed before an outstanding request with lower priority. Default |
| * priority is %G_PRIORITY_DEFAULT. |
| **/ |
| void |
| g_file_enumerator_next_files_async (GFileEnumerator *enumerator, |
| int num_files, |
| int io_priority, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| GFileEnumeratorClass *class; |
| |
| g_return_if_fail (G_IS_FILE_ENUMERATOR (enumerator)); |
| g_return_if_fail (enumerator != NULL); |
| g_return_if_fail (num_files >= 0); |
| |
| if (num_files == 0) |
| { |
| GTask *task; |
| |
| task = g_task_new (enumerator, cancellable, callback, user_data); |
| g_task_set_source_tag (task, g_file_enumerator_next_files_async); |
| g_task_return_pointer (task, NULL, NULL); |
| g_object_unref (task); |
| return; |
| } |
| |
| if (enumerator->priv->closed) |
| { |
| g_task_report_new_error (enumerator, callback, user_data, |
| g_file_enumerator_next_files_async, |
| G_IO_ERROR, G_IO_ERROR_CLOSED, |
| _("File enumerator is already closed")); |
| return; |
| } |
| |
| if (enumerator->priv->pending) |
| { |
| g_task_report_new_error (enumerator, callback, user_data, |
| g_file_enumerator_next_files_async, |
| G_IO_ERROR, G_IO_ERROR_PENDING, |
| _("File enumerator has outstanding operation")); |
| return; |
| } |
| |
| class = G_FILE_ENUMERATOR_GET_CLASS (enumerator); |
| |
| enumerator->priv->pending = TRUE; |
| enumerator->priv->outstanding_callback = callback; |
| g_object_ref (enumerator); |
| (* class->next_files_async) (enumerator, num_files, io_priority, cancellable, |
| next_async_callback_wrapper, user_data); |
| } |
| |
| /** |
| * g_file_enumerator_next_files_finish: |
| * @enumerator: a #GFileEnumerator. |
| * @result: a #GAsyncResult. |
| * @error: a #GError location to store the error occurring, or %NULL to |
| * ignore. |
| * |
| * Finishes the asynchronous operation started with g_file_enumerator_next_files_async(). |
| * |
| * Returns: (transfer full) (element-type Gio.FileInfo): a #GList of #GFileInfos. You must free the list with |
| * g_list_free() and unref the infos with g_object_unref() when you're |
| * done with them. |
| **/ |
| GList * |
| g_file_enumerator_next_files_finish (GFileEnumerator *enumerator, |
| GAsyncResult *result, |
| GError **error) |
| { |
| GFileEnumeratorClass *class; |
| |
| g_return_val_if_fail (G_IS_FILE_ENUMERATOR (enumerator), NULL); |
| g_return_val_if_fail (G_IS_ASYNC_RESULT (result), NULL); |
| |
| if (g_async_result_legacy_propagate_error (result, error)) |
| return NULL; |
| else if (g_async_result_is_tagged (result, g_file_enumerator_next_files_async)) |
| return g_task_propagate_pointer (G_TASK (result), error); |
| |
| class = G_FILE_ENUMERATOR_GET_CLASS (enumerator); |
| return class->next_files_finish (enumerator, result, error); |
| } |
| |
| static void |
| close_async_callback_wrapper (GObject *source_object, |
| GAsyncResult *res, |
| gpointer user_data) |
| { |
| GFileEnumerator *enumerator = G_FILE_ENUMERATOR (source_object); |
| |
| enumerator->priv->pending = FALSE; |
| enumerator->priv->closed = TRUE; |
| if (enumerator->priv->outstanding_callback) |
| (*enumerator->priv->outstanding_callback) (source_object, res, user_data); |
| g_object_unref (enumerator); |
| } |
| |
| /** |
| * g_file_enumerator_close_async: |
| * @enumerator: a #GFileEnumerator. |
| * @io_priority: the [I/O priority][io-priority] of the request |
| * @cancellable: (nullable): optional #GCancellable object, %NULL to ignore. |
| * @callback: (scope async): a #GAsyncReadyCallback to call when the request is satisfied |
| * @user_data: (closure): the data to pass to callback function |
| * |
| * Asynchronously closes the file enumerator. |
| * |
| * If @cancellable is not %NULL, then the operation can be cancelled by |
| * triggering the cancellable object from another thread. If the operation |
| * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned in |
| * g_file_enumerator_close_finish(). |
| **/ |
| void |
| g_file_enumerator_close_async (GFileEnumerator *enumerator, |
| int io_priority, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| GFileEnumeratorClass *class; |
| |
| g_return_if_fail (G_IS_FILE_ENUMERATOR (enumerator)); |
| |
| if (enumerator->priv->closed) |
| { |
| g_task_report_new_error (enumerator, callback, user_data, |
| g_file_enumerator_close_async, |
| G_IO_ERROR, G_IO_ERROR_CLOSED, |
| _("File enumerator is already closed")); |
| return; |
| } |
| |
| if (enumerator->priv->pending) |
| { |
| g_task_report_new_error (enumerator, callback, user_data, |
| g_file_enumerator_close_async, |
| G_IO_ERROR, G_IO_ERROR_PENDING, |
| _("File enumerator has outstanding operation")); |
| return; |
| } |
| |
| class = G_FILE_ENUMERATOR_GET_CLASS (enumerator); |
| |
| enumerator->priv->pending = TRUE; |
| enumerator->priv->outstanding_callback = callback; |
| g_object_ref (enumerator); |
| (* class->close_async) (enumerator, io_priority, cancellable, |
| close_async_callback_wrapper, user_data); |
| } |
| |
| /** |
| * g_file_enumerator_close_finish: |
| * @enumerator: a #GFileEnumerator. |
| * @result: a #GAsyncResult. |
| * @error: a #GError location to store the error occurring, or %NULL to |
| * ignore. |
| * |
| * Finishes closing a file enumerator, started from g_file_enumerator_close_async(). |
| * |
| * If the file enumerator was already closed when g_file_enumerator_close_async() |
| * was called, then this function will report %G_IO_ERROR_CLOSED in @error, and |
| * return %FALSE. If the file enumerator had pending operation when the close |
| * operation was started, then this function will report %G_IO_ERROR_PENDING, and |
| * return %FALSE. If @cancellable was not %NULL, then the operation may have been |
| * cancelled by triggering the cancellable object from another thread. If the operation |
| * was cancelled, the error %G_IO_ERROR_CANCELLED will be set, and %FALSE will be |
| * returned. |
| * |
| * Returns: %TRUE if the close operation has finished successfully. |
| **/ |
| gboolean |
| g_file_enumerator_close_finish (GFileEnumerator *enumerator, |
| GAsyncResult *result, |
| GError **error) |
| { |
| GFileEnumeratorClass *class; |
| |
| g_return_val_if_fail (G_IS_FILE_ENUMERATOR (enumerator), FALSE); |
| g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE); |
| |
| if (g_async_result_legacy_propagate_error (result, error)) |
| return FALSE; |
| else if (g_async_result_is_tagged (result, g_file_enumerator_close_async)) |
| return g_task_propagate_boolean (G_TASK (result), error); |
| |
| class = G_FILE_ENUMERATOR_GET_CLASS (enumerator); |
| return class->close_finish (enumerator, result, error); |
| } |
| |
| /** |
| * g_file_enumerator_is_closed: |
| * @enumerator: a #GFileEnumerator. |
| * |
| * Checks if the file enumerator has been closed. |
| * |
| * Returns: %TRUE if the @enumerator is closed. |
| **/ |
| gboolean |
| g_file_enumerator_is_closed (GFileEnumerator *enumerator) |
| { |
| g_return_val_if_fail (G_IS_FILE_ENUMERATOR (enumerator), TRUE); |
| |
| return enumerator->priv->closed; |
| } |
| |
| /** |
| * g_file_enumerator_has_pending: |
| * @enumerator: a #GFileEnumerator. |
| * |
| * Checks if the file enumerator has pending operations. |
| * |
| * Returns: %TRUE if the @enumerator has pending operations. |
| **/ |
| gboolean |
| g_file_enumerator_has_pending (GFileEnumerator *enumerator) |
| { |
| g_return_val_if_fail (G_IS_FILE_ENUMERATOR (enumerator), TRUE); |
| |
| return enumerator->priv->pending; |
| } |
| |
| /** |
| * g_file_enumerator_set_pending: |
| * @enumerator: a #GFileEnumerator. |
| * @pending: a boolean value. |
| * |
| * Sets the file enumerator as having pending operations. |
| **/ |
| void |
| g_file_enumerator_set_pending (GFileEnumerator *enumerator, |
| gboolean pending) |
| { |
| g_return_if_fail (G_IS_FILE_ENUMERATOR (enumerator)); |
| |
| enumerator->priv->pending = pending; |
| } |
| |
| /** |
| * g_file_enumerator_iterate: |
| * @direnum: an open #GFileEnumerator |
| * @out_info: (out) (transfer none) (optional): Output location for the next #GFileInfo, or %NULL |
| * @out_child: (out) (transfer none) (optional): Output location for the next #GFile, or %NULL |
| * @cancellable: a #GCancellable |
| * @error: a #GError |
| * |
| * This is a version of g_file_enumerator_next_file() that's easier to |
| * use correctly from C programs. With g_file_enumerator_next_file(), |
| * the gboolean return value signifies "end of iteration or error", which |
| * requires allocation of a temporary #GError. |
| * |
| * In contrast, with this function, a %FALSE return from |
| * g_file_enumerator_iterate() *always* means |
| * "error". End of iteration is signaled by @out_info or @out_child being %NULL. |
| * |
| * Another crucial difference is that the references for @out_info and |
| * @out_child are owned by @direnum (they are cached as hidden |
| * properties). You must not unref them in your own code. This makes |
| * memory management significantly easier for C code in combination |
| * with loops. |
| * |
| * Finally, this function optionally allows retrieving a #GFile as |
| * well. |
| * |
| * You must specify at least one of @out_info or @out_child. |
| * |
| * The code pattern for correctly using g_file_enumerator_iterate() from C |
| * is: |
| * |
| * |[ |
| * direnum = g_file_enumerate_children (file, ...); |
| * while (TRUE) |
| * { |
| * GFileInfo *info; |
| * if (!g_file_enumerator_iterate (direnum, &info, NULL, cancellable, error)) |
| * goto out; |
| * if (!info) |
| * break; |
| * ... do stuff with "info"; do not unref it! ... |
| * } |
| * |
| * out: |
| * g_object_unref (direnum); // Note: frees the last @info |
| * ]| |
| * |
| * |
| * Since: 2.44 |
| */ |
| gboolean |
| g_file_enumerator_iterate (GFileEnumerator *direnum, |
| GFileInfo **out_info, |
| GFile **out_child, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| gboolean ret = FALSE; |
| GError *temp_error = NULL; |
| GFileInfo *ret_info = NULL; |
| |
| static GQuark cached_info_quark; |
| static GQuark cached_child_quark; |
| static gsize quarks_initialized; |
| |
| g_return_val_if_fail (direnum != NULL, FALSE); |
| g_return_val_if_fail (out_info != NULL || out_child != NULL, FALSE); |
| |
| if (g_once_init_enter (&quarks_initialized)) |
| { |
| cached_info_quark = g_quark_from_static_string ("g-cached-info"); |
| cached_child_quark = g_quark_from_static_string ("g-cached-child"); |
| g_once_init_leave (&quarks_initialized, 1); |
| } |
| |
| ret_info = g_file_enumerator_next_file (direnum, cancellable, &temp_error); |
| if (temp_error != NULL) |
| { |
| g_propagate_error (error, temp_error); |
| goto out; |
| } |
| |
| if (ret_info) |
| { |
| if (out_child != NULL) |
| { |
| const char *name = g_file_info_get_name (ret_info); |
| |
| if (G_UNLIKELY (name == NULL)) |
| g_warning ("g_file_enumerator_iterate() created without standard::name"); |
| else |
| { |
| *out_child = g_file_get_child (g_file_enumerator_get_container (direnum), name); |
| g_object_set_qdata_full ((GObject*)direnum, cached_child_quark, *out_child, (GDestroyNotify)g_object_unref); |
| } |
| } |
| if (out_info != NULL) |
| { |
| g_object_set_qdata_full ((GObject*)direnum, cached_info_quark, ret_info, (GDestroyNotify)g_object_unref); |
| *out_info = ret_info; |
| } |
| else |
| g_object_unref (ret_info); |
| } |
| else |
| { |
| if (out_info) |
| *out_info = NULL; |
| if (out_child) |
| *out_child = NULL; |
| } |
| |
| ret = TRUE; |
| out: |
| return ret; |
| } |
| |
| /** |
| * g_file_enumerator_get_container: |
| * @enumerator: a #GFileEnumerator |
| * |
| * Get the #GFile container which is being enumerated. |
| * |
| * Returns: (transfer none): the #GFile which is being enumerated. |
| * |
| * Since: 2.18 |
| */ |
| GFile * |
| g_file_enumerator_get_container (GFileEnumerator *enumerator) |
| { |
| g_return_val_if_fail (G_IS_FILE_ENUMERATOR (enumerator), NULL); |
| |
| return enumerator->priv->container; |
| } |
| |
| /** |
| * g_file_enumerator_get_child: |
| * @enumerator: a #GFileEnumerator |
| * @info: a #GFileInfo gotten from g_file_enumerator_next_file() |
| * or the async equivalents. |
| * |
| * Return a new #GFile which refers to the file named by @info in the source |
| * directory of @enumerator. This function is primarily intended to be used |
| * inside loops with g_file_enumerator_next_file(). |
| * |
| * This is a convenience method that's equivalent to: |
| * |[<!-- language="C" --> |
| * gchar *name = g_file_info_get_name (info); |
| * GFile *child = g_file_get_child (g_file_enumerator_get_container (enumr), |
| * name); |
| * ]| |
| * |
| * Returns: (transfer full): a #GFile for the #GFileInfo passed it. |
| * |
| * Since: 2.36 |
| */ |
| GFile * |
| g_file_enumerator_get_child (GFileEnumerator *enumerator, |
| GFileInfo *info) |
| { |
| g_return_val_if_fail (G_IS_FILE_ENUMERATOR (enumerator), NULL); |
| |
| return g_file_get_child (enumerator->priv->container, |
| g_file_info_get_name (info)); |
| } |
| |
| static void |
| next_async_op_free (GList *files) |
| { |
| g_list_free_full (files, g_object_unref); |
| } |
| |
| static void |
| next_files_thread (GTask *task, |
| gpointer source_object, |
| gpointer task_data, |
| GCancellable *cancellable) |
| { |
| GFileEnumerator *enumerator = source_object; |
| int num_files = GPOINTER_TO_INT (task_data); |
| GFileEnumeratorClass *class; |
| GList *files = NULL; |
| GError *error = NULL; |
| GFileInfo *info; |
| int i; |
| |
| class = G_FILE_ENUMERATOR_GET_CLASS (enumerator); |
| |
| for (i = 0; i < num_files; i++) |
| { |
| if (g_cancellable_set_error_if_cancelled (cancellable, &error)) |
| info = NULL; |
| else |
| info = class->next_file (enumerator, cancellable, &error); |
| |
| if (info == NULL) |
| { |
| /* If we get an error after first file, return that on next operation */ |
| if (error != NULL && i > 0) |
| { |
| if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) |
| g_error_free (error); /* Never propagate cancel errors to other call */ |
| else |
| enumerator->priv->outstanding_error = error; |
| error = NULL; |
| } |
| |
| break; |
| } |
| else |
| files = g_list_prepend (files, info); |
| } |
| |
| if (error) |
| { |
| g_list_free_full (files, g_object_unref); |
| g_task_return_error (task, error); |
| } |
| else |
| g_task_return_pointer (task, files, (GDestroyNotify)next_async_op_free); |
| } |
| |
| static void |
| g_file_enumerator_real_next_files_async (GFileEnumerator *enumerator, |
| int num_files, |
| int io_priority, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| GTask *task; |
| |
| task = g_task_new (enumerator, cancellable, callback, user_data); |
| g_task_set_source_tag (task, g_file_enumerator_real_next_files_async); |
| g_task_set_task_data (task, GINT_TO_POINTER (num_files), NULL); |
| g_task_set_priority (task, io_priority); |
| |
| g_task_run_in_thread (task, next_files_thread); |
| g_object_unref (task); |
| } |
| |
| static GList * |
| g_file_enumerator_real_next_files_finish (GFileEnumerator *enumerator, |
| GAsyncResult *result, |
| GError **error) |
| { |
| g_return_val_if_fail (g_task_is_valid (result, enumerator), NULL); |
| |
| return g_task_propagate_pointer (G_TASK (result), error); |
| } |
| |
| static void |
| close_async_thread (GTask *task, |
| gpointer source_object, |
| gpointer task_data, |
| GCancellable *cancellable) |
| { |
| GFileEnumerator *enumerator = source_object; |
| GFileEnumeratorClass *class; |
| GError *error = NULL; |
| gboolean result; |
| |
| class = G_FILE_ENUMERATOR_GET_CLASS (enumerator); |
| result = class->close_fn (enumerator, cancellable, &error); |
| if (result) |
| g_task_return_boolean (task, TRUE); |
| else |
| g_task_return_error (task, error); |
| } |
| |
| static void |
| g_file_enumerator_real_close_async (GFileEnumerator *enumerator, |
| int io_priority, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| GTask *task; |
| |
| task = g_task_new (enumerator, cancellable, callback, user_data); |
| g_task_set_source_tag (task, g_file_enumerator_real_close_async); |
| g_task_set_priority (task, io_priority); |
| |
| g_task_run_in_thread (task, close_async_thread); |
| g_object_unref (task); |
| } |
| |
| static gboolean |
| g_file_enumerator_real_close_finish (GFileEnumerator *enumerator, |
| GAsyncResult *result, |
| GError **error) |
| { |
| g_return_val_if_fail (g_task_is_valid (result, enumerator), FALSE); |
| |
| return g_task_propagate_boolean (G_TASK (result), error); |
| } |
