glib/gio/gdebugcontroller.c

/* GIO - GLib Input, Output and Streaming Library
 *
 * Copyright © 2021 Endless OS Foundation, LLC
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General
 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later
 */

#include "config.h"
#include "glib.h"
#include "glibintl.h"

#include "gdebugcontroller.h"
#include "ginitable.h"
#include "giomodule-priv.h"

/**
 * SECTION:gdebugcontroller
 * @title: GDebugController
 * @short_description: Debugging controller
 * @include: gio/gio.h
 *
 * #GDebugController is an interface to expose control of debugging features and
 * debug output.
 *
 * It is implemented on Linux using #GDebugControllerDBus, which exposes a D-Bus
 * interface to allow authenticated peers to control debug features in this
 * process.
 *
 * Whether debug output is enabled is exposed as
 * #GDebugController:debug-enabled. This controls g_log_set_debug_enabled() by
 * default. Application code may connect to the #GObject::notify signal for it
 * to control other parts of its debug infrastructure as necessary.
 *
 * Since: 2.72
 */

G_DEFINE_INTERFACE_WITH_CODE (GDebugController, g_debug_controller, G_TYPE_OBJECT,
                              g_type_interface_add_prerequisite (g_define_type_id, G_TYPE_INITABLE))

/**
 * g_debug_controller_dup_default:
 *
 * Gets a reference to the default #GDebugController for the system.
 *
 * Returns: (not nullable) (transfer full): a new reference to the default #GDebugController
 *
 * Since: 2.72
 */
GDebugController *
g_debug_controller_dup_default (void)
{
  return g_object_ref (_g_io_module_get_default (G_DEBUG_CONTROLLER_EXTENSION_POINT_NAME,
                                                 "GIO_USE_DEBUG_CONTROLLER",
                                                 NULL));
}

static void
g_debug_controller_default_init (GDebugControllerInterface *iface)
{
  /**
   * GDebugController:debug-enabled:
   *
   * %TRUE if debug output should be exposed (for example by forwarding it to
   * the journal), %FALSE otherwise.
   *
   * Since: 2.72
   */
  g_object_interface_install_property (iface,
                                       g_param_spec_boolean ("debug-enabled",
                                                             "Debug Enabled",
                                                             "Whether to expose debug output",
                                                             FALSE,
                                                             G_PARAM_READWRITE |
                                                             G_PARAM_STATIC_STRINGS |
                                                             G_PARAM_EXPLICIT_NOTIFY));
}

/**
 * g_debug_controller_get_debug_enabled:
 * @self: a #GDebugController
 *
 * Get the value of #GDebugController:debug-enabled.
 *
 * Returns: %TRUE if debug output should be exposed, %FALSE otherwise
 * Since: 2.72
 */
gboolean
g_debug_controller_get_debug_enabled (GDebugController *self)
{
  gboolean enabled;

  g_return_val_if_fail (G_IS_DEBUG_CONTROLLER (self), FALSE);

  g_object_get (G_OBJECT (self),
                "debug-enabled", &enabled,
                NULL);

  return enabled;
}

/**
 * g_debug_controller_set_debug_enabled:
 * @self: a #GDebugController
 * @debug_enabled: %TRUE if debug output should be exposed, %FALSE otherwise
 *
 * Set the value of #GDebugController:debug-enabled.
 *
 * Since: 2.72
 */
void
g_debug_controller_set_debug_enabled (GDebugController *self,
                                      gboolean          debug_enabled)
{
  g_return_if_fail (G_IS_DEBUG_CONTROLLER (self));

  g_object_set (G_OBJECT (self),
                "debug-enabled", debug_enabled,
                NULL);
}