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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>
137 lines
6.8 KiB
C
137 lines
6.8 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_DBUS_METHOD_INVOCATION_H__
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#define __G_DBUS_METHOD_INVOCATION_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_DBUS_METHOD_INVOCATION (g_dbus_method_invocation_get_type ())
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#define G_DBUS_METHOD_INVOCATION(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_DBUS_METHOD_INVOCATION, GDBusMethodInvocation))
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#define G_IS_DBUS_METHOD_INVOCATION(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_DBUS_METHOD_INVOCATION))
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/**
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* G_DBUS_METHOD_INVOCATION_HANDLED:
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*
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* The value returned by handlers of the signals generated by
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* the `gdbus-codegen` tool to indicate that a method call has been
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* handled by an implementation. It is equal to %TRUE, but using
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* this macro is sometimes more readable.
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*
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* In code that needs to be backwards-compatible with older GLib,
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* use %TRUE instead, often written like this:
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*
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* |[
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* g_dbus_method_invocation_return_error (invocation, ...);
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* return TRUE; // handled
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* ]|
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*
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* Since: 2.68
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*/
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#define G_DBUS_METHOD_INVOCATION_HANDLED TRUE GIO_AVAILABLE_MACRO_IN_2_68
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/**
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* G_DBUS_METHOD_INVOCATION_UNHANDLED:
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*
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* The value returned by handlers of the signals generated by
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* the `gdbus-codegen` tool to indicate that a method call has not been
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* handled by an implementation. It is equal to %FALSE, but using
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* this macro is sometimes more readable.
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*
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* In code that needs to be backwards-compatible with older GLib,
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* use %FALSE instead.
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*
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* Since: 2.68
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*/
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#define G_DBUS_METHOD_INVOCATION_UNHANDLED FALSE GIO_AVAILABLE_MACRO_IN_2_68
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GIO_AVAILABLE_IN_ALL
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GType g_dbus_method_invocation_get_type (void);
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GIO_AVAILABLE_IN_ALL
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const gchar *g_dbus_method_invocation_get_sender (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_ALL
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const gchar *g_dbus_method_invocation_get_object_path (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_ALL
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const gchar *g_dbus_method_invocation_get_interface_name (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_ALL
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const gchar *g_dbus_method_invocation_get_method_name (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_ALL
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const GDBusMethodInfo *g_dbus_method_invocation_get_method_info (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_2_38
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const GDBusPropertyInfo *g_dbus_method_invocation_get_property_info (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_ALL
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GDBusConnection *g_dbus_method_invocation_get_connection (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_ALL
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GDBusMessage *g_dbus_method_invocation_get_message (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_ALL
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GVariant *g_dbus_method_invocation_get_parameters (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_ALL
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gpointer g_dbus_method_invocation_get_user_data (GDBusMethodInvocation *invocation);
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GIO_AVAILABLE_IN_ALL
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void g_dbus_method_invocation_return_value (GDBusMethodInvocation *invocation,
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GVariant *parameters);
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#ifdef G_OS_UNIX
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GIO_AVAILABLE_IN_ALL
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void g_dbus_method_invocation_return_value_with_unix_fd_list (GDBusMethodInvocation *invocation,
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GVariant *parameters,
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GUnixFDList *fd_list);
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#endif /* G_OS_UNIX */
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GIO_AVAILABLE_IN_ALL
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void g_dbus_method_invocation_return_error (GDBusMethodInvocation *invocation,
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GQuark domain,
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gint code,
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const gchar *format,
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...) G_GNUC_PRINTF(4, 5);
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GIO_AVAILABLE_IN_ALL
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void g_dbus_method_invocation_return_error_valist (GDBusMethodInvocation *invocation,
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GQuark domain,
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gint code,
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const gchar *format,
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va_list var_args)
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G_GNUC_PRINTF(4, 0);
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GIO_AVAILABLE_IN_ALL
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void g_dbus_method_invocation_return_error_literal (GDBusMethodInvocation *invocation,
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GQuark domain,
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gint code,
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const gchar *message);
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GIO_AVAILABLE_IN_ALL
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void g_dbus_method_invocation_return_gerror (GDBusMethodInvocation *invocation,
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const GError *error);
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GIO_AVAILABLE_IN_ALL
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void g_dbus_method_invocation_take_error (GDBusMethodInvocation *invocation,
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GError *error);
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GIO_AVAILABLE_IN_ALL
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void g_dbus_method_invocation_return_dbus_error (GDBusMethodInvocation *invocation,
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const gchar *error_name,
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const gchar *error_message);
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G_END_DECLS
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#endif /* __G_DBUS_METHOD_INVOCATION_H__ */
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