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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>
88 lines
3.4 KiB
C
88 lines
3.4 KiB
C
/* GDBus - GLib D-Bus Library
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*
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* Copyright (C) 2008-2010 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: David Zeuthen <davidz@redhat.com>
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*/
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#ifndef __G_CREDENTIALS_H__
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#define __G_CREDENTIALS_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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#ifdef G_OS_UNIX
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/* To get the uid_t type */
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#include <unistd.h>
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#include <sys/types.h>
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#endif
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G_BEGIN_DECLS
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#define G_TYPE_CREDENTIALS (g_credentials_get_type ())
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#define G_CREDENTIALS(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_CREDENTIALS, GCredentials))
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#define G_CREDENTIALS_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_CREDENTIALS, GCredentialsClass))
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#define G_CREDENTIALS_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_CREDENTIALS, GCredentialsClass))
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#define G_IS_CREDENTIALS(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_CREDENTIALS))
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#define G_IS_CREDENTIALS_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_CREDENTIALS))
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typedef struct _GCredentialsClass GCredentialsClass;
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GIO_AVAILABLE_IN_ALL
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GType g_credentials_get_type (void);
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GIO_AVAILABLE_IN_ALL
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GCredentials *g_credentials_new (void);
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GIO_AVAILABLE_IN_ALL
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gchar *g_credentials_to_string (GCredentials *credentials);
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GIO_AVAILABLE_IN_ALL
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gpointer g_credentials_get_native (GCredentials *credentials,
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GCredentialsType native_type);
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GIO_AVAILABLE_IN_ALL
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void g_credentials_set_native (GCredentials *credentials,
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GCredentialsType native_type,
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gpointer native);
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GIO_AVAILABLE_IN_ALL
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gboolean g_credentials_is_same_user (GCredentials *credentials,
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GCredentials *other_credentials,
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GError **error);
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#ifdef G_OS_UNIX
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GIO_AVAILABLE_IN_2_36
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pid_t g_credentials_get_unix_pid (GCredentials *credentials,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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uid_t g_credentials_get_unix_user (GCredentials *credentials,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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gboolean g_credentials_set_unix_user (GCredentials *credentials,
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uid_t uid,
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GError **error);
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#endif
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G_END_DECLS
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#endif /* __G_CREDENTIALS_H__ */
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