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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>
256 lines
12 KiB
C
256 lines
12 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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* David Zeuthen <davidz@redhat.com>
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*/
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#ifndef __G_VOLUME_H__
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#define __G_VOLUME_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_VOLUME_IDENTIFIER_KIND_HAL_UDI:
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*
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* The string used to obtain a Hal UDI with g_volume_get_identifier().
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*
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* Deprecated: 2.58: Do not use, HAL is deprecated.
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*/
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#define G_VOLUME_IDENTIFIER_KIND_HAL_UDI "hal-udi" GIO_DEPRECATED_MACRO_IN_2_58
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/**
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* G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE:
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*
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* The string used to obtain a Unix device path with g_volume_get_identifier().
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*/
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#define G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE "unix-device"
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/**
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* G_VOLUME_IDENTIFIER_KIND_LABEL:
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*
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* The string used to obtain a filesystem label with g_volume_get_identifier().
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*/
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#define G_VOLUME_IDENTIFIER_KIND_LABEL "label"
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/**
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* G_VOLUME_IDENTIFIER_KIND_UUID:
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*
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* The string used to obtain a UUID with g_volume_get_identifier().
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*/
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#define G_VOLUME_IDENTIFIER_KIND_UUID "uuid"
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/**
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* G_VOLUME_IDENTIFIER_KIND_NFS_MOUNT:
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*
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* The string used to obtain a NFS mount with g_volume_get_identifier().
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*/
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#define G_VOLUME_IDENTIFIER_KIND_NFS_MOUNT "nfs-mount"
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/**
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* G_VOLUME_IDENTIFIER_KIND_CLASS:
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*
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* The string used to obtain the volume class with g_volume_get_identifier().
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*
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* Known volume classes include `device`, `network`, and `loop`. Other
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* classes may be added in the future.
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*
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* This is intended to be used by applications to classify #GVolume
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* instances into different sections - for example a file manager or
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* file chooser can use this information to show `network` volumes under
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* a "Network" heading and `device` volumes under a "Devices" heading.
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*/
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#define G_VOLUME_IDENTIFIER_KIND_CLASS "class"
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#define G_TYPE_VOLUME (g_volume_get_type ())
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#define G_VOLUME(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), G_TYPE_VOLUME, GVolume))
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#define G_IS_VOLUME(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), G_TYPE_VOLUME))
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#define G_VOLUME_GET_IFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), G_TYPE_VOLUME, GVolumeIface))
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/**
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* GVolumeIface:
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* @g_iface: The parent interface.
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* @changed: Changed signal that is emitted when the volume's state has changed.
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* @removed: The removed signal that is emitted when the #GVolume have been removed. If the recipient is holding references to the object they should release them so the object can be finalized.
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* @get_name: Gets a string containing the name of the #GVolume.
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* @get_icon: Gets a #GIcon for the #GVolume.
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* @get_uuid: Gets the UUID for the #GVolume. The reference is typically based on the file system UUID for the mount in question and should be considered an opaque string. Returns %NULL if there is no UUID available.
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* @get_drive: Gets a #GDrive the volume is located on. Returns %NULL if the #GVolume is not associated with a #GDrive.
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* @get_mount: Gets a #GMount representing the mounted volume. Returns %NULL if the #GVolume is not mounted.
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* @can_mount: Returns %TRUE if the #GVolume can be mounted.
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* @can_eject: Checks if a #GVolume can be ejected.
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* @mount_fn: Mounts a given #GVolume.
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* #GVolume implementations must emit the #GMountOperation::aborted
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* signal before completing a mount operation that is aborted while
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* awaiting input from the user through a #GMountOperation instance.
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* @mount_finish: Finishes a mount operation.
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* @eject: Ejects a given #GVolume.
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* @eject_finish: Finishes an eject operation.
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* @get_identifier: Returns the [identifier](#volume-identifiers) of the given kind, or %NULL if
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* the #GVolume doesn't have one.
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* @enumerate_identifiers: Returns an array strings listing the kinds
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* of [identifiers](#volume-identifiers) which the #GVolume has.
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* @should_automount: Returns %TRUE if the #GVolume should be automatically mounted.
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* @get_activation_root: Returns the activation root for the #GVolume if it is known in advance or %NULL if
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* it is not known.
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* @eject_with_operation: Starts ejecting a #GVolume using a #GMountOperation. Since 2.22.
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* @eject_with_operation_finish: Finishes an eject operation using a #GMountOperation. Since 2.22.
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* @get_sort_key: Gets a key used for sorting #GVolume instance or %NULL if no such key exists. Since 2.32.
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* @get_symbolic_icon: Gets a symbolic #GIcon for the #GVolume. Since 2.34.
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*
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* Interface for implementing operations for mountable volumes.
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**/
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typedef struct _GVolumeIface GVolumeIface;
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struct _GVolumeIface
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{
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GTypeInterface g_iface;
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/* signals */
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void (* changed) (GVolume *volume);
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void (* removed) (GVolume *volume);
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/* Virtual Table */
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char * (* get_name) (GVolume *volume);
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GIcon * (* get_icon) (GVolume *volume);
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char * (* get_uuid) (GVolume *volume);
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GDrive * (* get_drive) (GVolume *volume);
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GMount * (* get_mount) (GVolume *volume);
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gboolean (* can_mount) (GVolume *volume);
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gboolean (* can_eject) (GVolume *volume);
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void (* mount_fn) (GVolume *volume,
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GMountMountFlags flags,
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GMountOperation *mount_operation,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gboolean (* mount_finish) (GVolume *volume,
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GAsyncResult *result,
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GError **error);
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void (* eject) (GVolume *volume,
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GMountUnmountFlags flags,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gboolean (* eject_finish) (GVolume *volume,
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GAsyncResult *result,
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GError **error);
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char * (* get_identifier) (GVolume *volume,
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const char *kind);
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char ** (* enumerate_identifiers) (GVolume *volume);
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gboolean (* should_automount) (GVolume *volume);
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GFile * (* get_activation_root) (GVolume *volume);
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void (* eject_with_operation) (GVolume *volume,
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GMountUnmountFlags flags,
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GMountOperation *mount_operation,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gboolean (* eject_with_operation_finish) (GVolume *volume,
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GAsyncResult *result,
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GError **error);
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const gchar * (* get_sort_key) (GVolume *volume);
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GIcon * (* get_symbolic_icon) (GVolume *volume);
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};
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GIO_AVAILABLE_IN_ALL
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GType g_volume_get_type (void);
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GIO_AVAILABLE_IN_ALL
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char * g_volume_get_name (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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GIcon * g_volume_get_icon (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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GIcon * g_volume_get_symbolic_icon (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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char * g_volume_get_uuid (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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GDrive * g_volume_get_drive (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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GMount * g_volume_get_mount (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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gboolean g_volume_can_mount (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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gboolean g_volume_can_eject (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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gboolean g_volume_should_automount (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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void g_volume_mount (GVolume *volume,
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GMountMountFlags flags,
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GMountOperation *mount_operation,
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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_volume_mount_finish (GVolume *volume,
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GAsyncResult *result,
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GError **error);
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GIO_DEPRECATED_FOR(g_volume_eject_with_operation)
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void g_volume_eject (GVolume *volume,
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GMountUnmountFlags 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_DEPRECATED_FOR(g_volume_eject_with_operation_finish)
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gboolean g_volume_eject_finish (GVolume *volume,
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GAsyncResult *result,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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char * g_volume_get_identifier (GVolume *volume,
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const char *kind);
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GIO_AVAILABLE_IN_ALL
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char ** g_volume_enumerate_identifiers (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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GFile * g_volume_get_activation_root (GVolume *volume);
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GIO_AVAILABLE_IN_ALL
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void g_volume_eject_with_operation (GVolume *volume,
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GMountUnmountFlags flags,
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GMountOperation *mount_operation,
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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_volume_eject_with_operation_finish (GVolume *volume,
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GAsyncResult *result,
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GError **error);
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GIO_AVAILABLE_IN_2_32
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const gchar *g_volume_get_sort_key (GVolume *volume);
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G_END_DECLS
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#endif /* __G_VOLUME_H__ */
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