Use async-io rather than smol

This removes a number of dependencies that need to be built for
mctp-linux. smol internally uses async-io, so no change is expected.
This updates to the latest async-io version 2.6.0

Some examples/tests in other crates are still using smol where they need
additional features.

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>

Author: mkj

Cargo.lock

@@ -10,6 +10,7 @@ repository = "https://github.com/CodeConstruct/mctp-rs"
 [workspace.dependencies]
 anyhow = "1.0.80"
 argh = "0.1.12"
+async-io = "2.6"
 chrono = { version = "0.4", default-features = false }
 crc = "3.3"
 defmt = "0.3"

Cargo.toml

@@ -26,6 +26,7 @@ embedded-io-adapters = { workspace = true }
 env_logger =  { workspace = true }
 futures = "0.3"
 proptest = { workspace = true }
+async-io = { workspace = true }
 smol = { workspace = true }
 
 

mctp-estack/Cargo.toml

@@ -101,7 +101,7 @@ where
     F: Future<Output = R>,
 {
     let pktloop = router_loop(routera, routerb);
-    smol::block_on(async {
+    async_io::block_on(async {
         select! {
             res = test.fuse() => {
                 info!("Finished");

mctp-estack/tests/roundtrip.rs

@@ -10,7 +10,7 @@ categories = ["network-programming", "embedded", "hardware-support", "os::linux-
 [dependencies]
 libc = "0.2"
 mctp = { workspace = true, features = ["std"] }
-smol = { workspace = true }
+async-io = { workspace = true }
 
 [[example]]
 name = "mctp-req"

mctp-linux/Cargo.toml

@@ -16,7 +16,7 @@ fn main() -> std::io::Result<()> {
     let tx_buf = vec![0x02u8];
     let mut rx_buf = vec![0u8; 16];
 
-    let (typ, ic, rx_buf) = smol::block_on(async {
+    let (typ, ic, rx_buf) = async_io::block_on(async {
         ep.send(MCTP_TYPE_CONTROL, &tx_buf).await?;
         ep.recv(&mut rx_buf).await
     })?;

mctp-linux/examples/async-req.rs

@@ -39,8 +39,8 @@
 //! single-endpoint communication; general MCTP requesters may want a different
 //! socket model.
 
+use async_io::Async;
 use core::mem;
-use smol::Async;
 use std::fmt;
 use std::io::Error;
 use std::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, OwnedFd, RawFd};

mctp-linux/src/lib.rs

@@ -23,7 +23,7 @@ anyhow = "1.0"
 chrono = { workspace = true, features = ["clock"] }
 mctp-linux = { workspace = true }
 pldm-platform = { workspace = true, features = ["alloc"] }
-smol = "2.0"
+async-io = { workspace = true }
 env_logger = "0.11.3"
 
 [features]

pldm-file/Cargo.toml

@@ -12,7 +12,7 @@ const EID: Eid = Eid(8);
 fn main() -> Result<()> {
     let mut req = MctpLinuxAsyncReq::new(EID, None)?;
 
-    smol::block_on(async {
+    async_io::block_on(async {
         let mcm_prop =
             df_properties(&mut req, DfProperty::MaxConcurrentMedium).await;
         let fds_prop =

pldm-file/examples/client.rs

@@ -188,7 +188,7 @@ fn main() -> Result<()> {
 
     let mut buf = [0u8; 4096];
 
-    smol::block_on(async {
+    async_io::block_on(async {
         loop {
             let (typ, _ic, buf, chan) = listener.recv(&mut buf).await?;