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       1                 :             : /* GIO - GLib Input, Output and Streaming Library
       2                 :             :  *
       3                 :             :  * Copyright 2019 Red Hat, Inc
       4                 :             :  * Copyright 2021 Igalia S.L.
       5                 :             :  *
       6                 :             :  * SPDX-License-Identifier: LGPL-2.1-or-later
       7                 :             :  *
       8                 :             :  * This library is free software; you can redistribute it and/or
       9                 :             :  * modify it under the terms of the GNU Lesser General Public
      10                 :             :  * License as published by the Free Software Foundation; either
      11                 :             :  * version 2.1 of the License, or (at your option) any later version.
      12                 :             :  *
      13                 :             :  * This library is distributed in the hope that it will be useful,
      14                 :             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15                 :             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16                 :             :  * Lesser General Public License for more details.
      17                 :             :  *
      18                 :             :  * You should have received a copy of the GNU Lesser General
      19                 :             :  * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
      20                 :             :  */
      21                 :             : 
      22                 :             : #include "config.h"
      23                 :             : #include "glib.h"
      24                 :             : #include "glibintl.h"
      25                 :             : 
      26                 :             : #include "gpowerprofilemonitor.h"
      27                 :             : #include "ginetaddress.h"
      28                 :             : #include "ginetsocketaddress.h"
      29                 :             : #include "ginitable.h"
      30                 :             : #include "gioenumtypes.h"
      31                 :             : #include "giomodule-priv.h"
      32                 :             : #include "gtask.h"
      33                 :             : 
      34                 :             : /**
      35                 :             :  * GPowerProfileMonitor:
      36                 :             :  *
      37                 :             :  * `GPowerProfileMonitor` makes it possible for applications as well as OS
      38                 :             :  * components to monitor system power profiles and act upon them. It currently
      39                 :             :  * only exports whether the system is in “Power Saver” mode (known as
      40                 :             :  * “Low Power” mode on some systems).
      41                 :             :  *
      42                 :             :  * When in “Low Power” mode, it is recommended that applications:
      43                 :             :  *
      44                 :             :  * - disable automatic downloads;
      45                 :             :  * - reduce the rate of refresh from online sources such as calendar or
      46                 :             :  *   email synchronisation;
      47                 :             :  * - reduce the use of expensive visual effects.
      48                 :             :  *
      49                 :             :  * It is also likely that OS components providing services to applications will
      50                 :             :  * lower their own background activity, for the sake of the system.
      51                 :             :  *
      52                 :             :  * There are a variety of tools that exist for power consumption analysis, but those
      53                 :             :  * usually depend on the OS and hardware used. On Linux, one could use `upower` to
      54                 :             :  * monitor the battery discharge rate, `powertop` to check on the background activity
      55                 :             :  * or activity at all), `sysprof` to inspect CPU usage, and `intel_gpu_time` to
      56                 :             :  * profile GPU usage.
      57                 :             :  *
      58                 :             :  * Don’t forget to disconnect the [signal@GObject.Object::notify] signal for
      59                 :             :  * [property@Gio.PowerProfileMonitor:power-saver-enabled], and unref the
      60                 :             :  * `GPowerProfileMonitor` itself when exiting.
      61                 :             :  *
      62                 :             :  * Since: 2.70
      63                 :             :  */
      64                 :             : 
      65                 :             : /**
      66                 :             :  * GPowerProfileMonitorInterface:
      67                 :             :  * @g_iface: The parent interface.
      68                 :             :  *
      69                 :             :  * The virtual function table for #GPowerProfileMonitor.
      70                 :             :  *
      71                 :             :  * Since: 2.70
      72                 :             :  */
      73                 :             : 
      74                 :         393 : G_DEFINE_INTERFACE_WITH_CODE (GPowerProfileMonitor, g_power_profile_monitor, G_TYPE_OBJECT,
      75                 :             :                               g_type_interface_add_prerequisite (g_define_type_id, G_TYPE_INITABLE))
      76                 :             : 
      77                 :             : 
      78                 :             : /**
      79                 :             :  * g_power_profile_monitor_dup_default:
      80                 :             :  *
      81                 :             :  * Gets a reference to the default #GPowerProfileMonitor for the system.
      82                 :             :  *
      83                 :             :  * Returns: (not nullable) (transfer full): a new reference to the default #GPowerProfileMonitor
      84                 :             :  *
      85                 :             :  * Since: 2.70
      86                 :             :  */
      87                 :             : GPowerProfileMonitor *
      88                 :           1 : g_power_profile_monitor_dup_default (void)
      89                 :             : {
      90                 :           1 :   return g_object_ref (_g_io_module_get_default (G_POWER_PROFILE_MONITOR_EXTENSION_POINT_NAME,
      91                 :             :                                                  "GIO_USE_POWER_PROFILE_MONITOR",
      92                 :             :                                                  NULL));
      93                 :             : }
      94                 :             : 
      95                 :             : /**
      96                 :             :  * g_power_profile_monitor_get_power_saver_enabled:
      97                 :             :  * @monitor: a #GPowerProfileMonitor
      98                 :             :  *
      99                 :             :  * Gets whether the system is in “Power Saver” mode.
     100                 :             :  *
     101                 :             :  * You are expected to listen to the
     102                 :             :  * #GPowerProfileMonitor::notify::power-saver-enabled signal to know when the profile has
     103                 :             :  * changed.
     104                 :             :  *
     105                 :             :  * Returns: Whether the system is in “Power Saver” mode.
     106                 :             :  *
     107                 :             :  * Since: 2.70
     108                 :             :  */
     109                 :             : gboolean
     110                 :           0 : g_power_profile_monitor_get_power_saver_enabled (GPowerProfileMonitor *monitor)
     111                 :             : {
     112                 :             :   gboolean enabled;
     113                 :           0 :   g_object_get (monitor, "power-saver-enabled", &enabled, NULL);
     114                 :           0 :   return enabled;
     115                 :             : }
     116                 :             : 
     117                 :             : static void
     118                 :           2 : g_power_profile_monitor_default_init (GPowerProfileMonitorInterface *iface)
     119                 :             : {
     120                 :             :   /**
     121                 :             :    * GPowerProfileMonitor:power-saver-enabled:
     122                 :             :    *
     123                 :             :    * Whether “Power Saver” mode is enabled on the system.
     124                 :             :    *
     125                 :             :    * Since: 2.70
     126                 :             :    */
     127                 :           2 :   g_object_interface_install_property (iface,
     128                 :             :                                        g_param_spec_boolean ("power-saver-enabled", NULL, NULL,
     129                 :             :                                                              FALSE,
     130                 :             :                                                              G_PARAM_READABLE | G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY));
     131                 :           2 : }