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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>
300 lines
17 KiB
C
300 lines
17 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2008 Red Hat, Inc.
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* Copyright (C) 2018 Igalia S.L.
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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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#ifndef __G_RESOLVER_H__
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#define __G_RESOLVER_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_RESOLVER (g_resolver_get_type ())
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#define G_RESOLVER(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_RESOLVER, GResolver))
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#define G_RESOLVER_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_RESOLVER, GResolverClass))
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#define G_IS_RESOLVER(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_RESOLVER))
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#define G_IS_RESOLVER_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_RESOLVER))
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#define G_RESOLVER_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_RESOLVER, GResolverClass))
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typedef struct _GResolverPrivate GResolverPrivate;
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typedef struct _GResolverClass GResolverClass;
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struct _GResolver {
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GObject parent_instance;
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GResolverPrivate *priv;
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};
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/**
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* GResolverNameLookupFlags:
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* @G_RESOLVER_NAME_LOOKUP_FLAGS_DEFAULT: default behavior (same as g_resolver_lookup_by_name())
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* @G_RESOLVER_NAME_LOOKUP_FLAGS_IPV4_ONLY: only resolve ipv4 addresses
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* @G_RESOLVER_NAME_LOOKUP_FLAGS_IPV6_ONLY: only resolve ipv6 addresses
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*
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* Flags to modify lookup behavior.
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*
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* Since: 2.60
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*/
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typedef enum {
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G_RESOLVER_NAME_LOOKUP_FLAGS_DEFAULT = 0,
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G_RESOLVER_NAME_LOOKUP_FLAGS_IPV4_ONLY = 1 << 0,
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G_RESOLVER_NAME_LOOKUP_FLAGS_IPV6_ONLY = 1 << 1,
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} G_GNUC_FLAG_ENUM GResolverNameLookupFlags;
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struct _GResolverClass {
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GObjectClass parent_class;
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/* Signals */
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void ( *reload) (GResolver *resolver);
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/* Virtual methods */
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GList * ( *lookup_by_name) (GResolver *resolver,
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const gchar *hostname,
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GCancellable *cancellable,
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GError **error);
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void ( *lookup_by_name_async) (GResolver *resolver,
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const gchar *hostname,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GList * ( *lookup_by_name_finish) (GResolver *resolver,
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GAsyncResult *result,
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GError **error);
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gchar * ( *lookup_by_address) (GResolver *resolver,
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GInetAddress *address,
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GCancellable *cancellable,
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GError **error);
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void ( *lookup_by_address_async) (GResolver *resolver,
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GInetAddress *address,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gchar * ( *lookup_by_address_finish) (GResolver *resolver,
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GAsyncResult *result,
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GError **error);
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GList * ( *lookup_service) (GResolver *resolver,
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const gchar *rrname,
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GCancellable *cancellable,
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GError **error);
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void ( *lookup_service_async) (GResolver *resolver,
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const gchar *rrname,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GList * ( *lookup_service_finish) (GResolver *resolver,
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GAsyncResult *result,
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GError **error);
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GList * ( *lookup_records) (GResolver *resolver,
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const gchar *rrname,
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GResolverRecordType record_type,
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GCancellable *cancellable,
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GError **error);
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void ( *lookup_records_async) (GResolver *resolver,
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const gchar *rrname,
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GResolverRecordType record_type,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GList * ( *lookup_records_finish) (GResolver *resolver,
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GAsyncResult *result,
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GError **error);
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/**
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* GResolverClass::lookup_by_name_with_flags_async:
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* @resolver: a #GResolver
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* @hostname: the hostname to resolve
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* @flags: extra #GResolverNameLookupFlags to modify the lookup
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* @cancellable: (nullable): a #GCancellable
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* @callback: (scope async): a #GAsyncReadyCallback to call when completed
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* @user_data: data to pass to @callback
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*
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* Asynchronous version of GResolverClass::lookup_by_name_with_flags
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*
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* GResolverClass::lookup_by_name_with_flags_finish will be called to get
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* the result.
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*
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* Since: 2.60
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*/
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void ( *lookup_by_name_with_flags_async) (GResolver *resolver,
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const gchar *hostname,
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GResolverNameLookupFlags flags,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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/**
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* GResolverClass::lookup_by_name_with_flags_finish:
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* @resolver: a #GResolver
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* @result: a #GAsyncResult
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* @error: (nullable): a pointer to a %NULL #GError
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*
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* Gets the result from GResolverClass::lookup_by_name_with_flags_async
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*
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* Returns: (element-type GInetAddress) (transfer full): List of #GInetAddress.
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* Since: 2.60
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*/
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GList * ( *lookup_by_name_with_flags_finish) (GResolver *resolver,
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GAsyncResult *result,
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GError **error);
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/**
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* GResolverClass::lookup_by_name_with_flags:
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* @resolver: a #GResolver
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* @hostname: the hostname to resolve
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* @flags: extra #GResolverNameLookupFlags to modify the lookup
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* @cancellable: (nullable): a #GCancellable
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* @error: (nullable): a pointer to a %NULL #GError
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*
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* This is identical to GResolverClass::lookup_by_name except it takes
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* @flags which modifies the behavior of the lookup. See #GResolverNameLookupFlags
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* for more details.
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*
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* Returns: (element-type GInetAddress) (transfer full): List of #GInetAddress.
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* Since: 2.60
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*/
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GList * ( *lookup_by_name_with_flags) (GResolver *resolver,
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const gchar *hostname,
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GResolverNameLookupFlags flags,
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GCancellable *cancellable,
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GError **error);
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};
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GIO_AVAILABLE_IN_ALL
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GType g_resolver_get_type (void);
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GIO_AVAILABLE_IN_ALL
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GResolver *g_resolver_get_default (void);
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GIO_AVAILABLE_IN_ALL
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void g_resolver_set_default (GResolver *resolver);
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GIO_AVAILABLE_IN_ALL
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GList *g_resolver_lookup_by_name (GResolver *resolver,
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const gchar *hostname,
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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_resolver_lookup_by_name_async (GResolver *resolver,
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const gchar *hostname,
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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_resolver_lookup_by_name_finish (GResolver *resolver,
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GAsyncResult *result,
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GError **error);
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GIO_AVAILABLE_IN_2_60
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void g_resolver_lookup_by_name_with_flags_async (GResolver *resolver,
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const gchar *hostname,
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GResolverNameLookupFlags flags,
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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_2_60
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GList *g_resolver_lookup_by_name_with_flags_finish (GResolver *resolver,
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GAsyncResult *result,
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GError **error);
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GIO_AVAILABLE_IN_2_60
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GList *g_resolver_lookup_by_name_with_flags (GResolver *resolver,
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const gchar *hostname,
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GResolverNameLookupFlags flags,
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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_resolver_free_addresses (GList *addresses);
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GIO_AVAILABLE_IN_ALL
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gchar *g_resolver_lookup_by_address (GResolver *resolver,
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GInetAddress *address,
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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_resolver_lookup_by_address_async (GResolver *resolver,
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GInetAddress *address,
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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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gchar *g_resolver_lookup_by_address_finish (GResolver *resolver,
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GAsyncResult *result,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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GList *g_resolver_lookup_service (GResolver *resolver,
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const gchar *service,
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const gchar *protocol,
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const gchar *domain,
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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_resolver_lookup_service_async (GResolver *resolver,
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const gchar *service,
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const gchar *protocol,
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const gchar *domain,
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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_resolver_lookup_service_finish (GResolver *resolver,
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GAsyncResult *result,
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GError **error);
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GIO_AVAILABLE_IN_2_34
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GList *g_resolver_lookup_records (GResolver *resolver,
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const gchar *rrname,
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GResolverRecordType record_type,
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GCancellable *cancellable,
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GError **error);
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GIO_AVAILABLE_IN_2_34
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void g_resolver_lookup_records_async (GResolver *resolver,
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const gchar *rrname,
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GResolverRecordType record_type,
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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_2_34
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GList *g_resolver_lookup_records_finish (GResolver *resolver,
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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_resolver_free_targets (GList *targets);
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GIO_AVAILABLE_IN_2_78
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unsigned g_resolver_get_timeout (GResolver *resolver);
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GIO_AVAILABLE_IN_2_78
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void g_resolver_set_timeout (GResolver *resolver,
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unsigned timeout_ms);
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/**
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* G_RESOLVER_ERROR:
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*
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* Error domain for #GResolver. Errors in this domain will be from the
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* #GResolverError enumeration. See #GError for more information on
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* error domains.
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*/
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#define G_RESOLVER_ERROR (g_resolver_error_quark ())
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GIO_AVAILABLE_IN_ALL
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GQuark g_resolver_error_quark (void);
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G_END_DECLS
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#endif /* __G_RESOLVER_H__ */
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