net: Remove async-std dependency and prefer smol.

Also we now take the global executor and keep it around in P2p.

Cargo.toml

@@ -62,6 +62,7 @@ async-std = {version = "1.12.0", features = ["attributes"], optional = true}
 async-trait = {version = "0.1.73", optional = true}
 futures = {version = "0.3.28", optional = true}
 smol = {version = "1.3.0", optional = true}
+pin-project-lite = {version = "0.2.12", optional = true}
 
 # Networking
 async-rustls = {version = "0.4.0", features = ["dangerous_configuration"], optional = true}
@@ -186,18 +187,19 @@ event-graph = [
 
 net = [
     "async-rustls",
+    "async-trait",
     "ed25519-compact",
+    "futures",
     "rand",
     "rcgen",
     "rustls-pemfile",
     "semver",
-    "socket2",
+    "smol",
     "structopt",
     "structopt-toml",
     "url",
     "x509-parser",
 
-    "async-runtime",
     "darkfi-serial",
     "darkfi-serial/async",
     "darkfi-serial/url",
@@ -220,9 +222,9 @@ rpc = [
 ]
 
 system = [
+    "pin-project-lite",
     "rand",
-
+    "smol",
-    "async-runtime",
 ]
 
 tx = [

example/net.rs

@@ -28,11 +28,11 @@ use darkfi::{
     Result,
 };
 
-async fn start(executor: Arc<Executor<'_>>, options: ProgramOptions) -> Result<()> {
+async fn start(executor: Arc<Executor<'static>>, options: ProgramOptions) -> Result<()> {
-    let p2p = net::P2p::new(options.network_settings).await;
+    let p2p = net::P2p::new(options.network_settings, executor.clone()).await;
 
-    p2p.clone().start(executor.clone()).await?;
+    p2p.clone().start().await?;
-    p2p.run(executor).await?;
+    p2p.run().await?;
 
     Ok(())
 }

src/consensus/task/consensus_sync.rs

@@ -24,7 +24,7 @@ use crate::{
         Float10, ValidatorStatePtr,
     },
     net::P2pPtr,
-    util::async_util::sleep,
+    system::sleep,
     Result,
 };
 

src/consensus/task/proposal.rs

@@ -23,7 +23,8 @@ use super::consensus_sync_task;
 use crate::{
     consensus::{constants, ValidatorStatePtr},
     net::P2pPtr,
-    util::{async_util::sleep, time::Timestamp},
+    system::sleep,
+    util::time::Timestamp,
     Result,
 };
 

src/error.rs

@@ -127,8 +127,9 @@ pub enum Error {
     #[error("Connection failed")]
     ConnectFailed,
 
-    #[error("Timeout Error")]
+    #[cfg(feature = "system")]
-    TimeoutError,
+    #[error(transparent)]
+    TimeoutError(#[from] crate::system::timeout::TimeoutError),
 
     #[error("Connection timed out")]
     ConnectTimeout,
@@ -616,13 +617,6 @@ impl From<std::io::Error> for ClientFailed {
     }
 }
 
-#[cfg(feature = "async-std")]
-impl From<async_std::future::TimeoutError> for Error {
-    fn from(_err: async_std::future::TimeoutError) -> Self {
-        Self::TimeoutError
-    }
-}
-
 impl From<std::io::Error> for Error {
     fn from(err: std::io::Error) -> Self {
         Self::Io(err.kind())

src/event_graph/model.rs

@@ -428,7 +428,7 @@ mod tests {
     };
 
     use super::*;
-    use crate::{event_graph::events_queue::EventsQueue, util::async_util::sleep, Result};
+    use crate::{event_graph::events_queue::EventsQueue, system::sleep, Result};
 
     #[derive(SerialEncodable, SerialDecodable, Clone, Debug)]
     pub struct PrivMsgEvent {

src/event_graph/protocol_event.rs

@@ -28,7 +28,8 @@ use crate::{
     event_graph::model::{Event, EventId, ModelPtr},
     impl_p2p_message, net,
     net::Message,
-    util::{async_util::sleep, ringbuffer::RingBuffer},
+    system::sleep,
+    util::ringbuffer::RingBuffer,
     Result,
 };
 

src/net/acceptor.rs

@@ -16,9 +16,10 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use async_std::sync::{Arc, Mutex};
+use std::sync::Arc;
+
 use log::error;
-use smol::Executor;
+use smol::{lock::Mutex, Executor};
 use url::Url;
 
 use super::{

src/net/channel.rs

@@ -16,15 +16,16 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use async_std::sync::{Arc, Mutex};
+use std::sync::Arc;
+
 use darkfi_serial::{serialize, SerialDecodable, SerialEncodable};
-use futures::{
-    io::{ReadHalf, WriteHalf},
-    AsyncReadExt,
-};
 use log::{debug, error, info};
 use rand::{rngs::OsRng, Rng};
-use smol::Executor;
+use smol::{
+    io::{self, ReadHalf, WriteHalf},
+    lock::Mutex,
+    Executor,
+};
 use url::Url;
 
 use super::{
@@ -89,7 +90,7 @@ impl Channel {
     /// summons the message subscriber subsystem. Performs a network handshake
     /// on the subsystem dispatchers.
     pub async fn new(stream: Box<dyn PtStream>, addr: Url, session: SessionWeakPtr) -> Arc<Self> {
-        let (reader, writer) = stream.split();
+        let (reader, writer) = io::split(stream);
         let reader = Mutex::new(reader);
         let writer = Mutex::new(writer);
 

src/net/dnet.rs

@@ -16,9 +16,11 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+use darkfi_serial::{SerialDecodable, SerialEncodable};
+use url::Url;
+
 use super::channel::ChannelInfo;
 use crate::util::time::NanoTimestamp;
-use url::Url;
 
 macro_rules! dnetev {
     ($self:expr, $event_name:ident, $($code:tt)*) => {

src/net/hosts.rs

@@ -16,11 +16,14 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use std::collections::{HashMap, HashSet};
+use std::{
+    collections::{HashMap, HashSet},
+    sync::Arc,
+};
 
-use async_std::sync::{Arc, RwLock};
 use log::debug;
 use rand::{prelude::IteratorRandom, rngs::OsRng};
+use smol::lock::RwLock;
 use url::Url;
 
 use super::settings::SettingsPtr;
@@ -243,77 +246,81 @@ impl Hosts {
 mod tests {
     use super::{super::settings::Settings, *};
 
-    #[async_std::test]
+    #[test]
-    async fn test_store_localnet() {
+    fn test_store_localnet() {
-        let mut settings = Settings::default();
+        smol::block_on(async {
-        settings.localnet = true;
+            let mut settings = Settings::default();
-        settings.external_addrs = vec![
+            settings.localnet = true;
-            Url::parse("tcp://foo.bar:123").unwrap(),
+            settings.external_addrs = vec![
-            Url::parse("tcp://lol.cat:321").unwrap(),
+                Url::parse("tcp://foo.bar:123").unwrap(),
-        ];
+                Url::parse("tcp://lol.cat:321").unwrap(),
+            ];
 
-        let hosts = Hosts::new(Arc::new(settings.clone()));
+            let hosts = Hosts::new(Arc::new(settings.clone()));
-        hosts.store(&settings.external_addrs).await;
+            hosts.store(&settings.external_addrs).await;
-        for i in settings.external_addrs {
+            for i in settings.external_addrs {
-            assert!(hosts.contains(&i).await);
+                assert!(hosts.contains(&i).await);
-        }
+            }
 
-        let local_hosts = vec![
+            let local_hosts = vec![
-            Url::parse("tcp://localhost:3921").unwrap(),
+                Url::parse("tcp://localhost:3921").unwrap(),
-            Url::parse("tcp://127.0.0.1:23957").unwrap(),
+                Url::parse("tcp://127.0.0.1:23957").unwrap(),
-            Url::parse("tcp://[::1]:21481").unwrap(),
+                Url::parse("tcp://[::1]:21481").unwrap(),
-            Url::parse("tcp://192.168.10.65:311").unwrap(),
+                Url::parse("tcp://192.168.10.65:311").unwrap(),
-            Url::parse("tcp://0.0.0.0:2312").unwrap(),
+                Url::parse("tcp://0.0.0.0:2312").unwrap(),
-            Url::parse("tcp://255.255.255.255:2131").unwrap(),
+                Url::parse("tcp://255.255.255.255:2131").unwrap(),
-        ];
+            ];
-        hosts.store(&local_hosts).await;
+            hosts.store(&local_hosts).await;
-        for i in local_hosts {
+            for i in local_hosts {
-            assert!(hosts.contains(&i).await);
+                assert!(hosts.contains(&i).await);
-        }
+            }
 
-        let remote_hosts = vec![
+            let remote_hosts = vec![
-            Url::parse("tcp://dark.fi:80").unwrap(),
+                Url::parse("tcp://dark.fi:80").unwrap(),
-            Url::parse("tcp://top.kek:111").unwrap(),
+                Url::parse("tcp://top.kek:111").unwrap(),
-            Url::parse("tcp://http.cat:401").unwrap(),
+                Url::parse("tcp://http.cat:401").unwrap(),
-        ];
+            ];
-        hosts.store(&remote_hosts).await;
+            hosts.store(&remote_hosts).await;
-        for i in remote_hosts {
+            for i in remote_hosts {
-            assert!(hosts.contains(&i).await);
+                assert!(hosts.contains(&i).await);
-        }
+            }
+        });
     }
 
-    #[async_std::test]
+    #[test]
-    async fn test_store() {
+    fn test_store() {
-        let mut settings = Settings::default();
+        smol::block_on(async {
-        settings.localnet = false;
+            let mut settings = Settings::default();
-        settings.external_addrs = vec![
+            settings.localnet = false;
-            Url::parse("tcp://foo.bar:123").unwrap(),
+            settings.external_addrs = vec![
-            Url::parse("tcp://lol.cat:321").unwrap(),
+                Url::parse("tcp://foo.bar:123").unwrap(),
-        ];
+                Url::parse("tcp://lol.cat:321").unwrap(),
+            ];
 
-        let hosts = Hosts::new(Arc::new(settings.clone()));
+            let hosts = Hosts::new(Arc::new(settings.clone()));
-        hosts.store(&settings.external_addrs).await;
+            hosts.store(&settings.external_addrs).await;
-        assert!(hosts.is_empty().await);
+            assert!(hosts.is_empty().await);
 
-        let local_hosts = vec![
+            let local_hosts = vec![
-            Url::parse("tcp://localhost:3921").unwrap(),
+                Url::parse("tcp://localhost:3921").unwrap(),
-            Url::parse("tcp://127.0.0.1:23957").unwrap(),
+                Url::parse("tcp://127.0.0.1:23957").unwrap(),
-            Url::parse("tor://[::1]:21481").unwrap(),
+                Url::parse("tor://[::1]:21481").unwrap(),
-            Url::parse("tcp://192.168.10.65:311").unwrap(),
+                Url::parse("tcp://192.168.10.65:311").unwrap(),
-            Url::parse("tcp+tls://0.0.0.0:2312").unwrap(),
+                Url::parse("tcp+tls://0.0.0.0:2312").unwrap(),
-            Url::parse("tcp://255.255.255.255:2131").unwrap(),
+                Url::parse("tcp://255.255.255.255:2131").unwrap(),
-        ];
+            ];
-        hosts.store(&local_hosts).await;
+            hosts.store(&local_hosts).await;
-        assert!(hosts.is_empty().await);
+            assert!(hosts.is_empty().await);
 
-        let remote_hosts = vec![
+            let remote_hosts = vec![
-            Url::parse("tcp://dark.fi:80").unwrap(),
+                Url::parse("tcp://dark.fi:80").unwrap(),
-            Url::parse("tcp://http.cat:401").unwrap(),
+                Url::parse("tcp://http.cat:401").unwrap(),
-            Url::parse("tcp://foo.bar:111").unwrap(),
+                Url::parse("tcp://foo.bar:111").unwrap(),
-        ];
+            ];
-        hosts.store(&remote_hosts).await;
+            hosts.store(&remote_hosts).await;
-        assert!(hosts.contains(&remote_hosts[0]).await);
+            assert!(hosts.contains(&remote_hosts[0]).await);
-        assert!(hosts.contains(&remote_hosts[1]).await);
+            assert!(hosts.contains(&remote_hosts[1]).await);
-        assert!(!hosts.contains(&remote_hosts[2]).await);
+            assert!(!hosts.contains(&remote_hosts[2]).await);
+        });
     }
 }

src/net/message.rs

@@ -17,8 +17,8 @@
  */
 
 use darkfi_serial::{Decodable, Encodable, SerialDecodable, SerialEncodable, VarInt};
-use futures::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};
 use log::trace;
+use smol::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};
 use url::Url;
 
 use crate::{Error, Result};

src/net/message_subscriber.rs

@@ -16,13 +16,13 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use std::{any::Any, collections::HashMap, io::Cursor};
+use std::{any::Any, collections::HashMap, io::Cursor, sync::Arc};
 
-use async_std::sync::{Arc, Mutex};
 use async_trait::async_trait;
 use futures::stream::{FuturesUnordered, StreamExt};
 use log::{debug, warn};
 use rand::{rngs::OsRng, Rng};
+use smol::lock::Mutex;
 
 use super::message::Message;
 use crate::{Error, Result};
@@ -277,39 +277,41 @@ mod tests {
     use super::*;
     use darkfi_serial::{serialize, SerialDecodable, SerialEncodable};
 
-    #[async_std::test]
+    #[test]
-    async fn message_subscriber_test() {
+    fn message_subscriber_test() {
         #[derive(SerialEncodable, SerialDecodable)]
         struct MyVersionMessage(pub u32);
         crate::impl_p2p_message!(MyVersionMessage, "verver");
 
-        let subsystem = MessageSubsystem::new();
+        smol::block_on(async {
-        subsystem.add_dispatch::<MyVersionMessage>().await;
+            let subsystem = MessageSubsystem::new();
+            subsystem.add_dispatch::<MyVersionMessage>().await;
 
-        // Subscribe:
+            // Subscribe:
-        // 1. Get dispatcher
+            // 1. Get dispatcher
-        // 2. Cast to specific type
+            // 2. Cast to specific type
-        // 3. Do sub, return sub
+            // 3. Do sub, return sub
-        let sub = subsystem.subscribe::<MyVersionMessage>().await.unwrap();
+            let sub = subsystem.subscribe::<MyVersionMessage>().await.unwrap();
 
-        // Receive message and publish:
+            // Receive message and publish:
-        // 1. Based on string, lookup relevant dispatcher interface
+            // 1. Based on string, lookup relevant dispatcher interface
-        // 2. Publish data there
+            // 2. Publish data there
-        let msg = MyVersionMessage(110);
+            let msg = MyVersionMessage(110);
-        let payload = serialize(&msg);
+            let payload = serialize(&msg);
-        subsystem.notify("verver", &payload).await;
+            subsystem.notify("verver", &payload).await;
 
-        // Receive:
+            // Receive:
-        // 1. Do a get easy
+            // 1. Do a get easy
-        let msg2 = sub.receive().await.unwrap();
+            let msg2 = sub.receive().await.unwrap();
-        assert_eq!(msg.0, msg2.0);
+            assert_eq!(msg.0, msg2.0);
 
-        // Trigger an error
+            // Trigger an error
-        subsystem.trigger_error(Error::ChannelStopped).await;
+            subsystem.trigger_error(Error::ChannelStopped).await;
 
-        let msg2 = sub.receive().await;
+            let msg2 = sub.receive().await;
-        assert!(msg2.is_err());
+            assert!(msg2.is_err());
 
-        sub.unsubscribe().await;
+            sub.unsubscribe().await;
+        });
     }
 }

src/net/p2p.rs

@@ -16,16 +16,15 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use std::collections::{HashMap, HashSet};
+use std::{
-
+    collections::{HashMap, HashSet},
-use async_std::{
+    sync::Arc,
-    stream::StreamExt,
-    sync::{Arc, Mutex},
 };
+
 use futures::{stream::FuturesUnordered, TryFutureExt};
 use log::{debug, error, info, warn};
 use rand::{prelude::IteratorRandom, rngs::OsRng};
-use smol::Executor;
+use smol::{lock::Mutex, stream::StreamExt, Executor};
 use url::Url;
 
 use super::{
@@ -54,6 +53,8 @@ pub type P2pPtr = Arc<P2p>;
 
 /// Toplevel peer-to-peer networking interface
 pub struct P2p {
+    /// Global multithreaded executor reference
+    executor: Arc<Executor<'static>>,
     /// Channels pending connection
     pending: PendingChannels,
     /// Connected channels
@@ -93,10 +94,11 @@ impl P2p {
     ///
     /// Creates a weak pointer to self that is used by all sessions to access the
     /// p2p parent class.
-    pub async fn new(settings: Settings) -> P2pPtr {
+    pub async fn new(settings: Settings, executor: Arc<Executor<'static>>) -> P2pPtr {
         let settings = Arc::new(settings);
 
         let self_ = Arc::new(Self {
+            executor,
             pending: Mutex::new(HashSet::new()),
             channels: Mutex::new(HashMap::new()),
             channel_subscriber: Subscriber::new(),
@@ -126,28 +128,28 @@ impl P2p {
     }
 
     /// Invoke startup and seeding sequence. Call from constructing thread.
-    pub async fn start(self: Arc<Self>, ex: Arc<Executor<'_>>) -> Result<()> {
+    pub async fn start(self: Arc<Self>) -> Result<()> {
         debug!(target: "net::p2p::start()", "P2P::start() [BEGIN]");
         info!(target: "net::p2p::start()", "[P2P] Seeding P2P subsystem");
 
         // Start seed session
         let seed = SeedSyncSession::new(Arc::downgrade(&self));
         // This will block until all seed queries have finished
-        seed.start(ex.clone()).await?;
+        seed.start().await?;
 
         debug!(target: "net::p2p::start()", "P2P::start() [END]");
         Ok(())
     }
 
     /// Reseed the P2P network.
-    pub async fn reseed(self: Arc<Self>, ex: Arc<Executor<'_>>) -> Result<()> {
+    pub async fn reseed(self: Arc<Self>) -> Result<()> {
         debug!(target: "net::p2p::reseed()", "P2P::reseed() [BEGIN]");
         info!(target: "net::p2p::reseed()", "[P2P] Reseeding P2P subsystem");
 
         // Start seed session
         let seed = SeedSyncSession::new(Arc::downgrade(&self));
         // This will block until all seed queries have finished
-        seed.start(ex.clone()).await?;
+        seed.start().await?;
 
         debug!(target: "net::p2p::reseed()", "P2P::reseed() [END]");
         Ok(())
@@ -155,23 +157,23 @@ impl P2p {
 
     /// Runs the network. Starts inbound, outbound, and manual sessions.
     /// Waits for a stop signal and stops the network if received.
-    pub async fn run(self: Arc<Self>, ex: Arc<Executor<'_>>) -> Result<()> {
+    pub async fn run(self: Arc<Self>) -> Result<()> {
         debug!(target: "net::p2p::run()", "P2P::run() [BEGIN]");
         info!(target: "net::p2p::run()", "[P2P] Running P2P subsystem");
 
         // First attempt any set manual connections
         let manual = self.session_manual().await;
         for peer in &self.settings.peers {
-            manual.clone().connect(peer.clone(), ex.clone()).await;
+            manual.clone().connect(peer.clone()).await;
         }
 
         // Start the inbound session
         let inbound = self.session_inbound().await;
-        inbound.clone().start(ex.clone()).await?;
+        inbound.clone().start().await?;
 
         // Start the outbound session
         let outbound = self.session_outbound().await;
-        outbound.clone().start(ex.clone()).await?;
+        outbound.clone().start().await?;
 
         info!(target: "net::p2p::run()", "[P2P] P2P subsystem started");
 
@@ -287,6 +289,11 @@ impl P2p {
         self.hosts.clone()
     }
 
+    /// Reference the global executor
+    pub(super) fn executor(&self) -> Arc<Executor<'static>> {
+        self.executor.clone()
+    }
+
     /// Return a reference to the internal protocol registry
     pub fn protocol_registry(&self) -> &ProtocolRegistry {
         &self.protocol_registry

src/net/protocol/protocol_address.rs

@@ -16,7 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use async_std::sync::Arc;
+use std::sync::Arc;
+
 use async_trait::async_trait;
 use log::debug;
 use smol::Executor;
@@ -34,7 +35,7 @@ use super::{
     protocol_base::{ProtocolBase, ProtocolBasePtr},
     protocol_jobs_manager::{ProtocolJobsManager, ProtocolJobsManagerPtr},
 };
-use crate::{util::async_util::sleep, Result};
+use crate::{system::sleep, Result};
 
 /// Defines address and get-address messages
 pub struct ProtocolAddress {

src/net/protocol/protocol_base.rs

@@ -16,7 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use async_std::sync::Arc;
+use std::sync::Arc;
+
 use async_trait::async_trait;
 use smol::Executor;
 

src/net/protocol/protocol_jobs_manager.rs

@@ -16,10 +16,10 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use async_std::sync::{Arc, Mutex};
+use std::sync::Arc;
-use futures::Future;
+
 use log::{debug, trace};
-use smol::{Executor, Task};
+use smol::{future::Future, lock::Mutex, Executor, Task};
 
 use super::super::channel::ChannelPtr;
 use crate::Result;

src/net/protocol/protocol_ping.rs

@@ -16,9 +16,11 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use std::time::{Duration, Instant};
+use std::{
+    sync::Arc,
+    time::{Duration, Instant},
+};
 
-use async_std::{future::timeout, sync::Arc};
 use async_trait::async_trait;
 use log::{debug, error, warn};
 use rand::{rngs::OsRng, Rng};
@@ -35,7 +37,10 @@ use super::{
     protocol_base::{ProtocolBase, ProtocolBasePtr},
     protocol_jobs_manager::{ProtocolJobsManager, ProtocolJobsManagerPtr},
 };
-use crate::{util::async_util::sleep, Error, Result};
+use crate::{
+    system::{sleep, timeout::timeout},
+    Error, Result,
+};
 
 /// Defines ping and pong messages
 pub struct ProtocolPing {

src/net/protocol/protocol_registry.rs

@@ -16,17 +16,18 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use async_std::sync::Mutex;
-use futures::{future::BoxFuture, Future};
 use log::debug;
+use smol::{
+    future::{Boxed, Future},
+    lock::Mutex,
+};
 
 use super::{
     super::{channel::ChannelPtr, p2p::P2pPtr, session::SessionBitFlag},
     protocol_base::ProtocolBasePtr,
 };
 
-type Constructor =
+type Constructor = Box<dyn Fn(ChannelPtr, P2pPtr) -> Boxed<ProtocolBasePtr> + Send + Sync>;
-    Box<dyn Fn(ChannelPtr, P2pPtr) -> BoxFuture<'static, ProtocolBasePtr> + Send + Sync>;
 
 #[derive(Default)]
 pub struct ProtocolRegistry {
@@ -45,9 +46,8 @@ impl ProtocolRegistry {
         C: 'static + Fn(ChannelPtr, P2pPtr) -> F + Send + Sync,
         F: 'static + Future<Output = ProtocolBasePtr> + Send,
     {
-        let constructor = move |channel, p2p| {
+        let constructor =
-            Box::pin(constructor(channel, p2p)) as BoxFuture<'static, ProtocolBasePtr>
+            move |channel, p2p| Box::pin(constructor(channel, p2p)) as Boxed<ProtocolBasePtr>;
-        };
 
         self.constructors.lock().await.push((session_flags, Box::new(constructor)));
     }

src/net/protocol/protocol_seed.rs

@@ -16,7 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use async_std::sync::Arc;
+use std::sync::Arc;
+
 use async_trait::async_trait;
 use log::debug;
 use smol::Executor;

src/net/protocol/protocol_version.rs

@@ -16,9 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use std::time::Duration;
+use std::{sync::Arc, time::Duration};
 
-use async_std::{future::timeout, sync::Arc};
 use futures::future::join_all;
 use log::{debug, error};
 use smol::Executor;
@@ -30,7 +29,7 @@ use super::super::{
     message_subscriber::MessageSubscription,
     settings::SettingsPtr,
 };
-use crate::{Error, Result};
+use crate::{system::timeout::timeout, Error, Result};
 
 /// Implements the protocol version handshake sent out by nodes at
 /// the beginning of a connection.

src/net/session/inbound_session.rs

@@ -23,10 +23,11 @@
 //! an acceptor pointer, and a stoppable task pointer. Using a weak pointer
 //! to P2P allows us to avoid circular dependencies.
 
-use async_std::sync::{Arc, Mutex, Weak};
+use std::sync::{Arc, Weak};
+
 use async_trait::async_trait;
 use log::{debug, error, info};
-use smol::Executor;
+use smol::{lock::Mutex, Executor};
 use url::Url;
 
 use super::{
@@ -60,12 +61,14 @@ impl InboundSession {
     /// Starts the inbound session. Begins by accepting connections and fails
     /// if the addresses are not configured. Then runs the channel subscription
     /// loop.
-    pub async fn start(self: Arc<Self>, ex: Arc<Executor<'_>>) -> Result<()> {
+    pub async fn start(self: Arc<Self>) -> Result<()> {
         if self.p2p().settings().inbound_addrs.is_empty() {
             info!(target: "net::inbound_session", "[P2P] Not configured for inbound connections.");
             return Ok(())
         }
 
+        let ex = self.p2p().executor();
+
         // Activate mutex lock on accept tasks.
         let mut accept_tasks = self.accept_tasks.lock().await;
 

src/net/session/manual_session.rs

@@ -29,10 +29,11 @@
 //! and insures that no other part of the program uses the slots at the
 //! same time.
 
-use async_std::sync::{Arc, Mutex, Weak};
+use std::sync::{Arc, Weak};
+
 use async_trait::async_trait;
 use log::{info, warn};
-use smol::Executor;
+use smol::lock::Mutex;
 use url::Url;
 
 use super::{
@@ -44,8 +45,7 @@ use super::{
     Session, SessionBitFlag, SESSION_MANUAL,
 };
 use crate::{
-    system::{StoppableTask, StoppableTaskPtr, Subscriber, SubscriberPtr},
+    system::{sleep, StoppableTask, StoppableTaskPtr, Subscriber, SubscriberPtr},
-    util::async_util::sleep,
     Error, Result,
 };
 
@@ -82,11 +82,12 @@ impl ManualSession {
     }
 
     /// Connect the manual session to the given address
-    pub async fn connect(self: Arc<Self>, addr: Url, ex: Arc<Executor<'_>>) {
+    pub async fn connect(self: Arc<Self>, addr: Url) {
+        let ex = self.p2p().executor();
         let task = StoppableTask::new();
 
         task.clone().start(
-            self.clone().channel_connect_loop(addr, ex.clone()),
+            self.clone().channel_connect_loop(addr),
             // Ignore stop handler
             |_| async {},
             Error::NetworkServiceStopped,
@@ -97,11 +98,8 @@ impl ManualSession {
     }
 
     /// Creates a connector object and tries to connect using it
-    pub async fn channel_connect_loop(
+    pub async fn channel_connect_loop(self: Arc<Self>, addr: Url) -> Result<()> {
-        self: Arc<Self>,
+        let ex = self.p2p().executor();
-        addr: Url,
-        ex: Arc<Executor<'_>>,
-    ) -> Result<()> {
         let parent = Arc::downgrade(&self);
         let settings = self.p2p().settings();
         let connector = Connector::new(settings.clone(), Arc::new(parent));

src/net/session/mod.rs

@@ -16,7 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use async_std::sync::{Arc, Weak};
+use std::sync::{Arc, Weak};
+
 use async_trait::async_trait;
 use log::debug;
 use smol::Executor;

src/net/session/outbound_session.rs

@@ -26,12 +26,14 @@
 //! and insures that no other part of the program uses the slots at the
 //! same time.
 
-use std::collections::HashSet;
+use std::{
+    collections::HashSet,
+    sync::{Arc, Weak},
+};
 
-use async_std::sync::{Arc, Mutex, Weak};
 use async_trait::async_trait;
 use log::{debug, error, info, warn};
-use smol::Executor;
+use smol::{lock::Mutex, Executor};
 use url::Url;
 
 use super::{
@@ -45,8 +47,7 @@ use super::{
     Session, SessionBitFlag, SESSION_OUTBOUND,
 };
 use crate::{
-    system::{StoppableTask, StoppableTaskPtr, Subscriber, SubscriberPtr},
+    system::{sleep, StoppableTask, StoppableTaskPtr, Subscriber, SubscriberPtr},
-    util::async_util::sleep,
     Error, Result,
 };
 
@@ -98,7 +99,8 @@ impl OutboundSession {
     }
 
     /// Start the outbound session. Runs the channel connect loop.
-    pub async fn start(self: Arc<Self>, ex: Arc<Executor<'_>>) -> Result<()> {
+    pub async fn start(self: Arc<Self>) -> Result<()> {
+        let ex = self.p2p().executor();
         let n_slots = self.p2p().settings().outbound_connections;
         info!(target: "net::outbound_session", "[P2P] Starting {} outbound connection slots.", n_slots);
         // Activate mutex lock on connection slots.
@@ -108,7 +110,7 @@ impl OutboundSession {
             let task = StoppableTask::new();
 
             task.clone().start(
-                self.clone().channel_connect_loop(i, ex.clone()),
+                self.clone().channel_connect_loop(i),
                 // Ignore stop handler
                 |_| async {},
                 Error::NetworkServiceStopped,
@@ -131,11 +133,8 @@ impl OutboundSession {
     }
 
     /// Creates a connector object and tries to connect using it.
-    pub async fn channel_connect_loop(
+    pub async fn channel_connect_loop(self: Arc<Self>, slot: u32) -> Result<()> {
-        self: Arc<Self>,
+        let ex = self.p2p().executor();
-        slot: u32,
-        ex: Arc<Executor<'_>>,
-    ) -> Result<()> {
         let parent = Arc::downgrade(&self);
         let connector = Connector::new(self.p2p().settings(), Arc::new(parent));
 
@@ -199,7 +198,7 @@ impl OutboundSession {
         );
 
         // Find an address to connect to. We also do peer discovery here if needed.
-        let addr = self.load_address(slot, transports, ex.clone()).await?;
+        let addr = self.load_address(slot, transports).await?;
         info!(
             target: "net::outbound_session::try_connect()",
             "[P2P] Connecting outbound slot #{} [{}]",
@@ -270,12 +269,7 @@ impl OutboundSession {
     /// our own inbound address, then checks whether it is already connected
     /// (exists) or connecting (pending). If no address was found, we'll attempt
     /// to do peer discovery and try to fill the slot again.
-    async fn load_address(
+    async fn load_address(&self, slot: u32, transports: &[String]) -> Result<Url> {
-        &self,
-        slot: u32,
-        transports: &[String],
-        ex: Arc<Executor<'_>>,
-    ) -> Result<Url> {
         loop {
             let p2p = self.p2p();
             let retry_sleep = p2p.settings().outbound_connect_timeout;
@@ -349,7 +343,7 @@ impl OutboundSession {
             // inside peer_discovery, it will block here in the slot sessions, while
             // other slots can keep trying to find hosts. This is also why we sleep
             // in the beginning of this loop if peer discovery is currently active.
-            self.peer_discovery(slot, ex.clone()).await;
+            self.peer_discovery(slot).await;
         }
     }
 
@@ -360,7 +354,7 @@ impl OutboundSession {
     /// This function will also sleep `Settings::outbound_connect_timeout` seconds
     /// after broadcasting in order to let the P2P stack receive and work through
     /// the addresses it is expecting.
-    async fn peer_discovery(&self, slot: u32, ex: Arc<Executor<'_>>) {
+    async fn peer_discovery(&self, slot: u32) {
         let p2p = self.p2p();
 
         if *p2p.peer_discovery_running.lock().await {
@@ -395,7 +389,7 @@ impl OutboundSession {
                 "[P2P] No connected channels found for peer discovery. Reseeding.",
             );
 
-            if let Err(e) = p2p.clone().reseed(ex.clone()).await {
+            if let Err(e) = p2p.clone().reseed().await {
                 error!(
                     target: "net::outbound_session::peer_discovery()",
                     "[P2P] Network reseed failed: {}", e,

src/net/session/seedsync_session.rs

@@ -37,7 +37,8 @@
 //! function. This runs the version exchange protocol, stores the channel in the
 //! p2p list of channels, and subscribes to a stop signal.
 
-use async_std::sync::{Arc, Weak};
+use std::sync::{Arc, Weak};
+
 use async_trait::async_trait;
 use futures::future::join_all;
 use log::{debug, info, warn};
@@ -68,7 +69,7 @@ impl SeedSyncSession {
 
     /// Start the seed sync session. Creates a new task for every seed
     /// connection and starts the seed on each task.
-    pub async fn start(self: Arc<Self>, executor: Arc<Executor<'_>>) -> Result<()> {
+    pub async fn start(self: Arc<Self>) -> Result<()> {
         debug!(target: "net::session::seedsync_session", "SeedSyncSession::start() [START]");
         let settings = self.p2p().settings();
 
@@ -82,6 +83,7 @@ impl SeedSyncSession {
         }
 
         // Gather tasks so we can execute concurrently
+        let executor = self.p2p().executor();
         let mut tasks = Vec::with_capacity(settings.seeds.len());
         for (i, seed) in settings.seeds.iter().enumerate() {
             let ex_ = executor.clone();

src/net/settings.rs

@@ -16,7 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use async_std::sync::Arc;
+use std::sync::Arc;
+
 use structopt::StructOpt;
 use url::Url;
 

src/net/transport.rs

@@ -19,7 +19,7 @@
 use std::time::Duration;
 
 use async_trait::async_trait;
-use futures::{AsyncRead, AsyncWrite};
+use smol::io::{AsyncRead, AsyncWrite};
 use url::Url;
 
 use crate::{Error, Result};
@@ -270,7 +270,7 @@ impl Listener {
             "tcp" => {
                 // Build a TCP listener
                 enforce_hostport!(endpoint);
-                let variant = tcp::TcpListener::new(1024).await?;
+                let variant = tcp::TcpListener::new().await?;
                 let variant = ListenerVariant::Tcp(variant);
                 Ok(Self { endpoint, variant })
             }
@@ -279,7 +279,7 @@ impl Listener {
             "tcp+tls" => {
                 // Build a TCP listener wrapped with TLS
                 enforce_hostport!(endpoint);
-                let variant = tcp::TcpListener::new(1024).await?;
+                let variant = tcp::TcpListener::new().await?;
                 let variant = ListenerVariant::TcpTls(variant);
                 Ok(Self { endpoint, variant })
             }
@@ -334,10 +334,10 @@ impl Listener {
 pub trait PtStream: AsyncRead + AsyncWrite + Unpin + Send {}
 
 #[cfg(feature = "p2p-transport-tcp")]
-impl PtStream for async_std::net::TcpStream {}
+impl PtStream for smol::net::TcpStream {}
 
 #[cfg(feature = "p2p-transport-tcp")]
-impl PtStream for async_rustls::TlsStream<async_std::net::TcpStream> {}
+impl PtStream for async_rustls::TlsStream<smol::net::TcpStream> {}
 
 #[cfg(feature = "p2p-transport-tor")]
 impl PtStream for arti_client::DataStream {}
@@ -346,7 +346,7 @@ impl PtStream for arti_client::DataStream {}
 impl PtStream for async_rustls::TlsStream<arti_client::DataStream> {}
 
 #[cfg(feature = "p2p-transport-unix")]
-impl PtStream for async_std::os::unix::net::UnixStream {}
+impl PtStream for smol::net::unix::UnixStream {}
 
 /// Wrapper trait for async listeners
 #[async_trait]

src/net/transport/tcp.rs

@@ -16,17 +16,16 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use std::{io, time::Duration};
+use std::time::Duration;
 
 use async_rustls::{TlsAcceptor, TlsStream};
-use async_std::net::{SocketAddr, TcpListener as AsyncStdTcpListener, TcpStream};
 use async_trait::async_trait;
 use log::debug;
-use socket2::{Domain, Socket, TcpKeepalive, Type};
+use smol::net::{SocketAddr, TcpListener as SmolTcpListener, TcpStream};
 use url::Url;
 
 use super::{PtListener, PtStream};
-use crate::Result;
+use crate::{system::io_timeout, Result};
 
 /// TCP Dialer implementation
 #[derive(Debug, Clone)]
@@ -41,97 +40,48 @@ impl TcpDialer {
         Ok(Self { ttl })
     }
 
-    /// Internal helper function to create a TCP socket.
-    async fn create_socket(&self, socket_addr: SocketAddr) -> io::Result<Socket> {
-        let domain = if socket_addr.is_ipv4() { Domain::IPV4 } else { Domain::IPV6 };
-        let socket = Socket::new(domain, Type::STREAM, Some(socket2::Protocol::TCP))?;
-
-        if socket_addr.is_ipv6() {
-            socket.set_only_v6(true)?;
-        }
-
-        if let Some(ttl) = self.ttl {
-            socket.set_ttl(ttl)?;
-        }
-
-        socket.set_nodelay(true)?;
-        let keepalive = TcpKeepalive::new().with_time(Duration::from_secs(20));
-        socket.set_tcp_keepalive(&keepalive)?;
-        socket.set_reuse_port(true)?;
-
-        Ok(socket)
-    }
-
     /// Internal dial function
     pub(crate) async fn do_dial(
         &self,
         socket_addr: SocketAddr,
-        timeout: Option<Duration>,
+        conn_timeout: Option<Duration>,
     ) -> Result<TcpStream> {
         debug!(target: "net::tcp::do_dial", "Dialing {} with TCP...", socket_addr);
-        let socket = self.create_socket(socket_addr).await?;
+        let stream = if let Some(conn_timeout) = conn_timeout {
-
+            io_timeout(conn_timeout, TcpStream::connect(socket_addr)).await?
-        let connection = if let Some(timeout) = timeout {
-            socket.connect_timeout(&socket_addr.into(), timeout)
         } else {
-            socket.connect(&socket_addr.into())
+            TcpStream::connect(socket_addr).await?
         };
 
-        match connection {
+        if let Some(ttl) = self.ttl {
-            Ok(()) => {}
+            stream.set_ttl(ttl)?;
-            Err(err) if err.raw_os_error() == Some(libc::EINPROGRESS) => {}
-            Err(err) if err.kind() == io::ErrorKind::WouldBlock => {}
-            Err(err) => return Err(err.into()),
         }
 
-        socket.set_nonblocking(true)?;
+        stream.set_nodelay(true)?;
-        let stream = TcpStream::from(std::net::TcpStream::from(socket));
+
         Ok(stream)
     }
 }
 
 /// TCP Listener implementation
 #[derive(Debug, Clone)]
-pub struct TcpListener {
+pub struct TcpListener;
-    /// Size of the listen backlog for listen sockets
-    backlog: i32,
-}
 
 impl TcpListener {
     /// Instantiate a new [`TcpListener`] with given backlog size.
-    pub async fn new(backlog: i32) -> Result<Self> {
+    pub async fn new() -> Result<Self> {
-        Ok(Self { backlog })
+        Ok(Self {})
-    }
-
-    /// Internal helper function to create a TCP socket.
-    async fn create_socket(&self, socket_addr: SocketAddr) -> io::Result<Socket> {
-        let domain = if socket_addr.is_ipv4() { Domain::IPV4 } else { Domain::IPV6 };
-        let socket = Socket::new(domain, Type::STREAM, Some(socket2::Protocol::TCP))?;
-
-        if socket_addr.is_ipv6() {
-            socket.set_only_v6(true)?;
-        }
-
-        socket.set_nodelay(true)?;
-        let keepalive = TcpKeepalive::new().with_time(Duration::from_secs(20));
-        socket.set_tcp_keepalive(&keepalive)?;
-        socket.set_reuse_port(true)?;
-
-        Ok(socket)
     }
 
     /// Internal listen function
-    pub(crate) async fn do_listen(&self, socket_addr: SocketAddr) -> Result<AsyncStdTcpListener> {
+    pub(crate) async fn do_listen(&self, socket_addr: SocketAddr) -> Result<SmolTcpListener> {
-        let socket = self.create_socket(socket_addr).await?;
+        let listener = SmolTcpListener::bind(socket_addr).await?;
-        socket.bind(&socket_addr.into())?;
+        Ok(listener)
-        socket.listen(self.backlog)?;
-        socket.set_nonblocking(true)?;
-        Ok(AsyncStdTcpListener::from(std::net::TcpListener::from(socket)))
     }
 }
 
 #[async_trait]
-impl PtListener for AsyncStdTcpListener {
+impl PtListener for SmolTcpListener {
     async fn next(&self) -> Result<(Box<dyn PtStream>, Url)> {
         let (stream, peer_addr) = match self.accept().await {
             Ok((s, a)) => (s, a),
@@ -144,7 +94,7 @@ impl PtListener for AsyncStdTcpListener {
 }
 
 #[async_trait]
-impl PtListener for (TlsAcceptor, AsyncStdTcpListener) {
+impl PtListener for (TlsAcceptor, SmolTcpListener) {
     async fn next(&self) -> Result<(Box<dyn PtStream>, Url)> {
         let (stream, peer_addr) = match self.1.accept().await {
             Ok((s, a)) => (s, a),

src/net/transport/tls.rs

@@ -16,7 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use std::time::SystemTime;
+use std::{sync::Arc, time::SystemTime};
 
 use async_rustls::{
     rustls,
@@ -29,7 +29,6 @@ use async_rustls::{
     },
     TlsAcceptor, TlsConnector, TlsStream,
 };
-use async_std::sync::Arc;
 use log::error;
 use rustls_pemfile::pkcs8_private_keys;
 use x509_parser::{
@@ -255,8 +254,8 @@ impl TlsUpgrade {
     #[cfg(feature = "p2p-transport-tcp")]
     pub async fn upgrade_listener_tcp_tls(
         self,
-        listener: async_std::net::TcpListener,
+        listener: smol::net::TcpListener,
-    ) -> Result<(TlsAcceptor, async_std::net::TcpListener)> {
+    ) -> Result<(TlsAcceptor, smol::net::TcpListener)> {
         Ok((TlsAcceptor::from(self.server_config), listener))
     }
 }

src/net/transport/tor.rs

@@ -19,10 +19,9 @@
 use std::time::Duration;
 
 use arti_client::{config::BoolOrAuto, DataStream, StreamPrefs, TorClient};
-use async_std::future;
 use log::debug;
 
-use crate::Result;
+use crate::{system::timeout::timeout, Result};
 
 /// Tor Dialer implementation
 #[derive(Debug, Clone)]
@@ -39,7 +38,7 @@ impl TorDialer {
         &self,
         host: &str,
         port: u16,
-        timeout: Option<Duration>,
+        conn_timeout: Option<Duration>,
     ) -> Result<DataStream> {
         debug!(target: "net::tor::do_dial", "Dialing {}:{} with Tor...", host, port);
         debug!(target: "net::tor::do_dial", "Bootstrapping...");
@@ -47,15 +46,12 @@ impl TorDialer {
         let mut stream_prefs = StreamPrefs::new();
         stream_prefs.connect_to_onion_services(BoolOrAuto::Explicit(true));
 
-        if timeout.is_some() {
+        let stream = if let Some(conn_timeout) = conn_timeout {
-            let res = future::timeout(
+            timeout(conn_timeout, client.connect_with_prefs((host, port), &stream_prefs)).await?
-                timeout.unwrap(),
+        } else {
-                client.connect_with_prefs((host, port), &stream_prefs),
+            Ok(client.connect_with_prefs((host, port), &stream_prefs).await?)
-            )
+        };
-            .await?;
-            return Ok(res?)
-        }
 
-        Ok(client.connect_with_prefs((host, port), &stream_prefs).await?)
+        Ok(stream?)
     }
 }

src/net/transport/unix.rs

@@ -15,13 +15,15 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-use async_std::{
+
-    fs,
+use std::path::{Path, PathBuf};
-    os::unix::net::{UnixListener as AsyncStdUnixListener, UnixStream},
+
-    path::{Path, PathBuf},
-};
 use async_trait::async_trait;
 use log::debug;
+use smol::{
+    fs,
+    net::unix::{UnixListener as SmolUnixListener, UnixStream},
+};
 use url::Url;
 
 use super::{PtListener, PtStream};
@@ -59,16 +61,16 @@ impl UnixListener {
     }
 
     /// Internal listen function
-    pub(crate) async fn do_listen(&self, path: &PathBuf) -> Result<AsyncStdUnixListener> {
+    pub(crate) async fn do_listen(&self, path: &PathBuf) -> Result<SmolUnixListener> {
         // This rm is a bit aggressive, but c'est la vie.
         let _ = fs::remove_file(path).await;
-        let listener = AsyncStdUnixListener::bind(path).await?;
+        let listener = SmolUnixListener::bind(path)?;
         Ok(listener)
     }
 }
 
 #[async_trait]
-impl PtListener for AsyncStdUnixListener {
+impl PtListener for SmolUnixListener {
     async fn next(&self) -> Result<(Box<dyn PtStream>, Url)> {
         let (stream, _peer_addr) = match self.accept().await {
             Ok((s, a)) => (s, a),

src/system/mod.rs

@@ -16,6 +16,10 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+use std::time::Duration;
+
+use smol::Timer;
+
 /// Implementation of async background task spawning which are stoppable
 /// using channel signalling.
 pub mod stoppable_task;
@@ -28,3 +32,13 @@ pub use subscriber::{Subscriber, SubscriberPtr, Subscription};
 /// Async timeout implementations
 pub mod timeout;
 pub use timeout::io_timeout;
+
+/// Sleep for any number of seconds.
+pub async fn sleep(seconds: u64) {
+    Timer::after(Duration::from_secs(seconds)).await;
+}
+
+/// Sleep for any number of milliseconds.
+pub async fn msleep(millis: u64) {
+    Timer::after(Duration::from_millis(millis)).await;
+}

src/util/async_util.rs

@@ -1,30 +0,0 @@
-/* This file is part of DarkFi (https://dark.fi)
- *
- * Copyright (C) 2020-2023 Dyne.org foundation
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-use smol::Timer;
-use std::time::Duration;
-
-/// Sleep for any number of seconds.
-pub async fn sleep(seconds: u64) {
-    Timer::after(Duration::from_secs(seconds)).await;
-}
-
-/// Sleep for any number of milliseconds.
-pub async fn msleep(millis: u64) {
-    Timer::after(Duration::from_millis(millis)).await;
-}

src/util/cli.rs

@@ -118,7 +118,6 @@ pub fn get_log_config(verbosity_level: u8) -> simplelog::Config {
 ///
 /// The Cargo.toml dependencies needed for this are:
 /// ```text
-/// async-std = "1.12.0"
 /// darkfi = { path = "../../", features = ["util"] }
 /// easy-parallel = "3.2.0"
 /// signal-hook-async-std = "0.2.2"
@@ -159,7 +158,7 @@ pub fn get_log_config(verbosity_level: u8) -> simplelog::Config {
 /// }
 ///
 /// async_daemonize!(realmain);
-/// async fn realmain(args: Args, ex: Arc<smol::Executor<'_>>) -> Result<()> {
+/// async fn realmain(args: Args, ex: Arc<smol::Executor<'static>>) -> Result<()> {
 ///     println!("Hello, world!");
 ///     Ok(())
 /// }
@@ -201,7 +200,7 @@ macro_rules! async_daemonize {
 
             // https://docs.rs/smol/latest/smol/struct.Executor.html#examples
             let n_threads = std::thread::available_parallelism().unwrap().get();
-            let ex = async_std::sync::Arc::new(smol::Executor::new());
+            let ex = std::sync::Arc::new(smol::Executor::new());
             let (signal, shutdown) = smol::channel::unbounded::<()>();
             let (_, result) = easy_parallel::Parallel::new()
                 // Run four executor threads

src/util/mod.rs

@@ -16,10 +16,6 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-#[cfg(feature = "async-runtime")]
-/// async utility functions
-pub mod async_util;
-
 /// Command-line interface utilities
 pub mod cli;