config: Introduce new setting "softrealtime"

This adds support for a new configuration option "softrealtime" to be
read from the general section. This commit alone does nothing, the
following commit adds actually making use of the value.

Signed-off-by: Kai Krakow <kai@kaishome.de>

daemon/daemon_config.c

@@ -67,6 +67,8 @@ struct GameModeConfig {
 	char defaultgov[CONFIG_VALUE_MAX];
 	char desiredgov[CONFIG_VALUE_MAX];
 
+	char softrealtime[CONFIG_VALUE_MAX];
+
 	long reaper_frequency;
 };
 
@@ -157,6 +159,8 @@ static int inih_handler(void *user, const char *section, const char *name, const
 			valid = get_string_value(value, self->defaultgov);
 		} else if (strcmp(name, "desiredgov") == 0) {
 			valid = get_string_value(value, self->desiredgov);
+		} else if (strcmp(name, "softrealtime") == 0) {
+			valid = get_string_value(value, self->softrealtime);
 		}
 	} else if (strcmp(section, "custom") == 0) {
 		/* Custom subsection */
@@ -401,3 +405,11 @@ void config_get_desired_governor(GameModeConfig *self, char governor[CONFIG_VALU
 {
 	memcpy_locked_config(self, governor, self->desiredgov, sizeof(self->desiredgov));
 }
+
+/*
+ * Get the chosen soft realtime behavior
+ */
+void config_get_soft_realtime(GameModeConfig *self, char softrealtime[CONFIG_VALUE_MAX])
+{
+	memcpy_locked_config(self, softrealtime, self->softrealtime, sizeof(self->softrealtime));
+}

daemon/daemon_config.h

@@ -103,3 +103,8 @@ void config_get_default_governor(GameModeConfig *self, char governor[CONFIG_VALU
  * Get the chosen desired governor
  */
 void config_get_desired_governor(GameModeConfig *self, char governor[CONFIG_VALUE_MAX]);
+
+/*
+ * Get the chosen soft realtime behavior
+ */
+void config_get_soft_realtime(GameModeConfig *self, char softrealtime[CONFIG_VALUE_MAX]);

data/gamemoded.1

@@ -102,6 +102,10 @@ desiredgov=performance
 ; The default governer is used when leaving GameMode instead of restoring the original value
 defaultgov=powersave
 
+; By default, GameMode changes the scheduler policy to SCHED_ISO with 4 or more CPU cores,
+; force enable or disable with "on" or "off"
+softrealtime=auto
+
 [filter]
 ; If "whitelist" entry has a value(s)
 ; gamemode will reject anything not in the whitelist

example/gamemode.ini

@@ -7,6 +7,10 @@ desiredgov=performance
 ; The default governer is used when leaving GameMode instead of restoring the original value
 defaultgov=powersave
 
+; By default, GameMode changes the scheduler policy to SCHED_ISO with 4 or more CPU cores,
+; force enable or disable with "on" or "off"
+softrealtime=auto
+
 [filter]
 ; If "whitelist" entry has a value(s)
 ; gamemode will reject anything not in the whitelist