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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>
139 lines
4.8 KiB
C
139 lines
4.8 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_RESOURCE_H__
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#define __G_RESOURCE_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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/**
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* G_TYPE_RESOURCE:
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*
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* The #GType for #GResource.
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*/
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#define G_TYPE_RESOURCE (g_resource_get_type ())
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/**
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* G_RESOURCE_ERROR:
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*
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* Error domain for #GResource. Errors in this domain will be from the
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* #GResourceError enumeration. See #GError for more information on
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* error domains.
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*/
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#define G_RESOURCE_ERROR (g_resource_error_quark ())
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GIO_AVAILABLE_IN_2_32
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GQuark g_resource_error_quark (void);
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typedef struct _GStaticResource GStaticResource;
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struct _GStaticResource {
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/*< private >*/
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const guint8 *data;
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gsize data_len;
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GResource *resource;
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GStaticResource *next;
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gpointer padding;
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};
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GIO_AVAILABLE_IN_2_32
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GType g_resource_get_type (void);
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GIO_AVAILABLE_IN_2_32
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GResource * g_resource_new_from_data (GBytes *data,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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GResource * g_resource_ref (GResource *resource);
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GIO_AVAILABLE_IN_2_32
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void g_resource_unref (GResource *resource);
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GIO_AVAILABLE_IN_2_32
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GResource * g_resource_load (const gchar *filename,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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GInputStream *g_resource_open_stream (GResource *resource,
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const char *path,
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GResourceLookupFlags lookup_flags,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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GBytes * g_resource_lookup_data (GResource *resource,
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const char *path,
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GResourceLookupFlags lookup_flags,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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char ** g_resource_enumerate_children (GResource *resource,
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const char *path,
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GResourceLookupFlags lookup_flags,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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gboolean g_resource_get_info (GResource *resource,
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const char *path,
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GResourceLookupFlags lookup_flags,
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gsize *size,
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guint32 *flags,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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void g_resources_register (GResource *resource);
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GIO_AVAILABLE_IN_2_32
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void g_resources_unregister (GResource *resource);
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GIO_AVAILABLE_IN_2_32
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GInputStream *g_resources_open_stream (const char *path,
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GResourceLookupFlags lookup_flags,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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GBytes * g_resources_lookup_data (const char *path,
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GResourceLookupFlags lookup_flags,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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char ** g_resources_enumerate_children (const char *path,
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GResourceLookupFlags lookup_flags,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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gboolean g_resources_get_info (const char *path,
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GResourceLookupFlags lookup_flags,
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gsize *size,
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guint32 *flags,
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GError **error);
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GIO_AVAILABLE_IN_2_84
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gboolean g_resource_has_children (GResource *resource,
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const char *path);
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GIO_AVAILABLE_IN_2_84
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gboolean g_resources_has_children (const char *path);
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GIO_AVAILABLE_IN_2_32
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void g_static_resource_init (GStaticResource *static_resource);
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GIO_AVAILABLE_IN_2_32
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void g_static_resource_fini (GStaticResource *static_resource);
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GIO_AVAILABLE_IN_2_32
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GResource *g_static_resource_get_resource (GStaticResource *static_resource);
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G_END_DECLS
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#endif /* __G_RESOURCE_H__ */
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