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016829559e
g_type_ensure has a large comment saying _get_type shouldn't be marked with G_GNUC_CONST because it has side-effects on the first run, but it's OK if you consistently call g_type_ensure first. Unfortunately, this isn't accurate. GCC trunk (observed at r17-1725-ge259a182e1f100) now analyses points-to information more effectively and propagates its findings, so it sees the function modifies some global state, concludes that can't be possible (because of the const attribute), and deletes the stores. pure unfortunately is unsuitable for *_get_type too as it has a side-effect (writes to global memory). Mesa had a similar issue which I fixed recently [0]. glib and glibmm likely want the (not-yet-implemented) 'idempotent' attribute instead [1]. In fact, this exact problem is what motivated that request! :) ebassi mentions an alternative to the current setup as well, using atomics [2]. This problem has gone back many years but the compiler has finally fully outsmarted us here, so give in. [0] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/42361 [1] https://gcc.gnu.org/PR32911 [2] https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4249#note_2583110 Fixes: https://gitlab.gnome.org/GNOME/glib/-/work_items/3984 Signed-off-by: Sam James <sam@gentoo.org>
150 lines
6.2 KiB
C
150 lines
6.2 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2006-2007 Red Hat, Inc.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#ifndef __G_FILE_ENUMERATOR_H__
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#define __G_FILE_ENUMERATOR_H__
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#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
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#error "Only <gio/gio.h> can be included directly."
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#endif
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#include <gio/giotypes.h>
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G_BEGIN_DECLS
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#define G_TYPE_FILE_ENUMERATOR (g_file_enumerator_get_type ())
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#define G_FILE_ENUMERATOR(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_FILE_ENUMERATOR, GFileEnumerator))
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#define G_FILE_ENUMERATOR_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_FILE_ENUMERATOR, GFileEnumeratorClass))
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#define G_IS_FILE_ENUMERATOR(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_FILE_ENUMERATOR))
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#define G_IS_FILE_ENUMERATOR_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_FILE_ENUMERATOR))
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#define G_FILE_ENUMERATOR_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_FILE_ENUMERATOR, GFileEnumeratorClass))
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typedef struct _GFileEnumeratorClass GFileEnumeratorClass;
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typedef struct _GFileEnumeratorPrivate GFileEnumeratorPrivate;
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struct _GFileEnumerator
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{
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GObject parent_instance;
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/*< private >*/
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GFileEnumeratorPrivate *priv;
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};
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struct _GFileEnumeratorClass
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{
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GObjectClass parent_class;
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/* Virtual Table */
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GFileInfo * (* next_file) (GFileEnumerator *enumerator,
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GCancellable *cancellable,
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GError **error);
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gboolean (* close_fn) (GFileEnumerator *enumerator,
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GCancellable *cancellable,
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GError **error);
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void (* next_files_async) (GFileEnumerator *enumerator,
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int num_files,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GList * (* next_files_finish) (GFileEnumerator *enumerator,
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GAsyncResult *result,
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GError **error);
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void (* close_async) (GFileEnumerator *enumerator,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gboolean (* close_finish) (GFileEnumerator *enumerator,
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GAsyncResult *result,
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GError **error);
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/*< private >*/
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/* Padding for future expansion */
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void (*_g_reserved1) (void);
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void (*_g_reserved2) (void);
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void (*_g_reserved3) (void);
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void (*_g_reserved4) (void);
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void (*_g_reserved5) (void);
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void (*_g_reserved6) (void);
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void (*_g_reserved7) (void);
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};
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GIO_AVAILABLE_IN_ALL
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GType g_file_enumerator_get_type (void);
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GIO_AVAILABLE_IN_ALL
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GFileInfo *g_file_enumerator_next_file (GFileEnumerator *enumerator,
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GCancellable *cancellable,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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gboolean g_file_enumerator_close (GFileEnumerator *enumerator,
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GCancellable *cancellable,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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void g_file_enumerator_next_files_async (GFileEnumerator *enumerator,
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int num_files,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GIO_AVAILABLE_IN_ALL
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GList * g_file_enumerator_next_files_finish (GFileEnumerator *enumerator,
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GAsyncResult *result,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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void g_file_enumerator_close_async (GFileEnumerator *enumerator,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GIO_AVAILABLE_IN_ALL
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gboolean g_file_enumerator_close_finish (GFileEnumerator *enumerator,
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GAsyncResult *result,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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gboolean g_file_enumerator_is_closed (GFileEnumerator *enumerator);
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GIO_AVAILABLE_IN_ALL
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gboolean g_file_enumerator_has_pending (GFileEnumerator *enumerator);
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GIO_AVAILABLE_IN_ALL
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void g_file_enumerator_set_pending (GFileEnumerator *enumerator,
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gboolean pending);
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GIO_AVAILABLE_IN_ALL
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GFile * g_file_enumerator_get_container (GFileEnumerator *enumerator);
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GIO_AVAILABLE_IN_2_36
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GFile * g_file_enumerator_get_child (GFileEnumerator *enumerator,
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GFileInfo *info);
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GIO_AVAILABLE_IN_2_44
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gboolean g_file_enumerator_iterate (GFileEnumerator *direnum,
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GFileInfo **out_info,
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GFile **out_child,
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GCancellable *cancellable,
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GError **error);
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G_END_DECLS
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#endif /* __G_FILE_ENUMERATOR_H__ */
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