Instance: manage StateFile with std::unique_ptr

src/Instance.cxx

@@ -21,6 +21,7 @@
 #include "Instance.hxx"
 #include "Partition.hxx"
 #include "IdleFlags.hxx"
+#include "StateFile.hxx"
 #include "Stats.hxx"
 #include "client/List.hxx"
 #include "input/cache/Manager.hxx"

src/Instance.hxx

@@ -127,7 +127,7 @@ struct Instance final
 
 	std::list<Partition> partitions;
 
-	StateFile *state_file = nullptr;
+	std::unique_ptr<StateFile> state_file;
 
 #ifdef ENABLE_SQLITE
 	std::unique_ptr<StickerDatabase> sticker_database;

src/Main.cxx

@@ -262,7 +262,7 @@ glue_state_file_init(Instance &instance, const ConfigData &raw_config)
 	if (!config.IsEnabled())
 		return;
 
-	instance.state_file = new StateFile(std::move(config),
+	instance.state_file = std::make_unique< StateFile>(std::move(config),
 							   instance.partitions.front(),
 							   instance.event_loop);
 	instance.state_file->Read();
@@ -552,11 +552,6 @@ MainConfigured(const struct options &options, const ConfigData &raw_config)
 
 	instance.BeginShutdownUpdate();
 
-	if (instance.state_file != nullptr) {
-		instance.state_file->Write();
-		delete instance.state_file;
-	}
-
 	ZeroconfDeinit();
 
 	instance.BeginShutdownPartitions();