further tweaking of ipc entities lifecycle

parity/boot.rs

@@ -63,7 +63,7 @@ pub fn payload<B: ipc::BinaryConvertable>() -> Result<B, BootError> {
 }
 
 pub fn register(hv_url: &str, control_url: &str, module_id: IpcModuleId) -> GuardedSocket<HypervisorServiceClient<NanoSocket>>{
-	let hypervisor_client = nanoipc::init_client::<HypervisorServiceClient<_>>(hv_url).unwrap();
+	let hypervisor_client = nanoipc::fast_client::<HypervisorServiceClient<_>>(hv_url).unwrap();
 	hypervisor_client.handshake().unwrap();
 	hypervisor_client.module_ready(module_id, control_url.to_owned());
 
@@ -73,7 +73,7 @@ pub fn register(hv_url: &str, control_url: &str, module_id: IpcModuleId) -> Guar
 pub fn dependency<C: WithSocket<NanoSocket>>(url: &str)
 	-> Result<GuardedSocket<C>, BootError>
 {
-	nanoipc::init_client::<C>(url).map_err(|socket_err| BootError::DependencyConnect(socket_err))
+	nanoipc::generic_client::<C>(url).map_err(|socket_err| BootError::DependencyConnect(socket_err))
 }
 
 pub fn main_thread() -> Arc<AtomicBool> {

parity/io_handler.rs

@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, Ordering};
 use ethcore::client::Client;
 use ethcore::service::ClientIoMessage;
 use ethsync::{SyncProvider, ManageNetwork};
@@ -31,6 +32,7 @@ pub struct ClientIoHandler {
 	pub net: Arc<ManageNetwork>,
 	pub accounts: Arc<AccountProvider>,
 	pub info: Arc<Informant>,
+	pub shutdown: Arc<AtomicBool>
 }
 
 impl IoHandler<ClientIoMessage> for ClientIoHandler {
@@ -39,7 +41,7 @@ impl IoHandler<ClientIoMessage> for ClientIoHandler {
 	}
 
 	fn timeout(&self, _io: &IoContext<ClientIoMessage>, timer: TimerToken) {
-		if let INFO_TIMER = timer {
+		if timer == INFO_TIMER && !self.shutdown.load(Ordering::SeqCst) {
 			self.info.tick();
 		}
 	}

parity/modules.rs

@@ -68,7 +68,7 @@ mod ipc_deps {
 	pub use ethsync::{SyncClient, NetworkManagerClient, ServiceConfiguration};
 	pub use ethcore::client::ChainNotifyClient;
 	pub use hypervisor::{SYNC_MODULE_ID, BootArgs, HYPERVISOR_IPC_URL};
-	pub use nanoipc::{GuardedSocket, NanoSocket, init_client};
+	pub use nanoipc::{GuardedSocket, NanoSocket, generic_client, fast_client};
 	pub use ipc::IpcSocket;
 	pub use ipc::binary::serialize;
 }
@@ -130,11 +130,11 @@ pub fn sync
 	hypervisor.start();
 	hypervisor.wait_for_startup();
 
-	let sync_client = init_client::<SyncClient<_>>(
+	let sync_client = generic_client::<SyncClient<_>>(
 		&service_urls::with_base(&hypervisor.io_path, service_urls::SYNC)).unwrap();
-	let notify_client = init_client::<ChainNotifyClient<_>>(
+	let notify_client = generic_client::<ChainNotifyClient<_>>(
 		&service_urls::with_base(&hypervisor.io_path, service_urls::SYNC_NOTIFY)).unwrap();
-	let manage_client = init_client::<NetworkManagerClient<_>>(
+	let manage_client = generic_client::<NetworkManagerClient<_>>(
 		&service_urls::with_base(&hypervisor.io_path, service_urls::NETWORK_MANAGER)).unwrap();
 
 	*hypervisor_ref = Some(hypervisor);

parity/run.rs

@@ -246,8 +246,9 @@ pub fn execute(cmd: RunCmd) -> Result<(), String> {
 		sync: sync_provider.clone(),
 		net: manage_network.clone(),
 		accounts: account_provider.clone(),
+		shutdown: Default::default(),
 	});
-	service.register_io_handler(io_handler).expect("Error registering IO handler");
+	service.register_io_handler(io_handler.clone()).expect("Error registering IO handler");
 
 	// start ui
 	if cmd.ui {
@@ -260,6 +261,11 @@ pub fn execute(cmd: RunCmd) -> Result<(), String> {
 	// Handle exit
 	wait_for_exit(panic_handler, http_server, ipc_server, dapps_server, signer_server);
 
+	// to make sure timer does not spawn requests while shutdown is in progress
+	io_handler.shutdown.store(true, ::std::sync::atomic::Ordering::SeqCst);
+	// just Arc is dropping here, to allow other reference release in its default time
+	drop(io_handler);
+
 	// hypervisor should be shutdown first while everything still works and can be
 	// terminated gracefully
 	drop(hypervisor);