feat: add basic wasm support

Author: dignifiedquire

.github/workflows/ci.yml

@@ -58,6 +58,14 @@ jobs:
       with:
         command:  check
         args: --features unstable --all --bins --examples --tests
+        
+    - name: check wasm
+      uses: actions-rs/cargo@v1
+      with:
+        command:  check
+        target: wasm32-unknown-unknown
+        override: true
+        args: --features unstable --all --bins --tests
 
     - name: check bench
       uses: actions-rs/cargo@v1

Cargo.toml

@@ -63,14 +63,25 @@ once_cell = { version = "1.3.1", optional = true }
 pin-project-lite = { version = "0.1.4", optional = true }
 pin-utils = { version = "0.1.0-alpha.4", optional = true }
 slab = { version = "0.4.2", optional = true }
+
+[target.'cfg(not(target_os = "unknown"))'.dependencies]
 smol = { path = "../smol", optional = true }
 
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+wasm-timer = "0.2.4"
+wasm-bindgen-futures = "0.4.10"
+futures-channel = "0.3.4"
+
+[target.'cfg(target_arch = "wasm32")'.dev-dependencies]
+wasm-bindgen-test = "0.3.10"
+
 [dev-dependencies]
 femme = "1.3.0"
 rand = "0.7.3"
 surf = "1.0.3"
 tempdir = "0.3.7"
 futures = "0.3.4"
+rand_xorshift = "0.2.0"
 
 [[test]]
 name = "stream"

src/future/future/delay.rs

@@ -3,9 +3,9 @@ use std::pin::Pin;
 use std::time::Duration;
 
 use pin_project_lite::pin_project;
-use smol::Timer;
 
 use crate::task::{Context, Poll};
+use crate::utils::Timer;
 
 pin_project! {
     #[doc(hidden)]

src/future/timeout.rs

@@ -5,9 +5,9 @@ use std::pin::Pin;
 use std::time::Duration;
 
 use pin_project_lite::pin_project;
-use smol::Timer;
 
 use crate::task::{Context, Poll};
+use crate::utils::Timer;
 
 /// Awaits a future or times out after a duration of time.
 ///

src/io/mod.rs

@@ -307,22 +307,33 @@ cfg_std! {
 cfg_default! {
     // For use in the print macros.
     #[doc(hidden)]
+    #[cfg(not(target_os = "unknown"))]
     pub use stdio::{_eprint, _print};
 
+    #[cfg(not(target_os = "unknown"))]
     pub use stderr::{stderr, Stderr};
+    #[cfg(not(target_os = "unknown"))]
     pub use stdin::{stdin, Stdin};
+    #[cfg(not(target_os = "unknown"))]
     pub use stdout::{stdout, Stdout};
     pub use timeout::timeout;
 
     mod timeout;
+    #[cfg(not(target_os = "unknown"))]
     mod stderr;
+    #[cfg(not(target_os = "unknown"))]
     mod stdin;
+    #[cfg(not(target_os = "unknown"))]
     mod stdio;
+    #[cfg(not(target_os = "unknown"))]
     mod stdout;
 }
 
 cfg_unstable_default! {
+    #[cfg(not(target_os = "unknown"))]
     pub use stderr::StderrLock;
+    #[cfg(not(target_os = "unknown"))]
     pub use stdin::StdinLock;
+    #[cfg(not(target_os = "unknown"))]
     pub use stdout::StdoutLock;
 }

src/io/read/mod.rs

@@ -17,9 +17,9 @@ use std::mem;
 
 use crate::io::IoSliceMut;
 
-pub use take::Take;
 pub use bytes::Bytes;
 pub use chain::Chain;
+pub use take::Take;
 
 extension_trait! {
     use std::pin::Pin;
@@ -483,7 +483,7 @@ mod tests {
     use crate::prelude::*;
 
     #[test]
-    fn test_read_by_ref() -> io::Result<()> {
+    fn test_read_by_ref() {
         crate::task::block_on(async {
             let mut f = io::Cursor::new(vec![0u8, 1, 2, 3, 4, 5, 6, 7, 8]);
             let mut buffer = Vec::new();
@@ -493,14 +493,13 @@ mod tests {
                 let reference = f.by_ref();
 
                 // read at most 5 bytes
-                assert_eq!(reference.take(5).read_to_end(&mut buffer).await?, 5);
+                assert_eq!(reference.take(5).read_to_end(&mut buffer).await.unwrap(), 5);
                 assert_eq!(&buffer, &[0, 1, 2, 3, 4])
             } // drop our &mut reference so we can use f again
 
             // original file still usable, read the rest
-            assert_eq!(f.read_to_end(&mut other_buffer).await?, 4);
+            assert_eq!(f.read_to_end(&mut other_buffer).await.unwrap(), 4);
             assert_eq!(&other_buffer, &[5, 6, 7, 8]);
-            Ok(())
-        })
+        });
     }
 }

src/io/read/take.rs

@@ -218,7 +218,7 @@ impl<T: BufRead> BufRead for Take<T> {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, not(target_os = "unknown")))]
 mod tests {
     use crate::io;
     use crate::prelude::*;

src/io/timeout.rs

@@ -4,9 +4,9 @@ use std::task::{Context, Poll};
 use std::time::Duration;
 
 use pin_project_lite::pin_project;
-use smol::Timer;
 
 use crate::io;
+use crate::utils::Timer;
 
 /// Awaits an I/O future or times out after a duration of time.
 ///

src/lib.rs

@@ -267,14 +267,17 @@ cfg_std! {
 }
 
 cfg_default! {
+    #[cfg(not(target_os = "unknown"))]
     pub mod fs;
     pub mod path;
     pub mod net;
+    #[cfg(not(target_os = "unknown"))]
     pub(crate) mod rt;
 }
 
 cfg_unstable! {
     pub mod pin;
+    #[cfg(not(target_os = "unknown"))]
     pub mod process;
 
     mod unit;

src/net/mod.rs

@@ -61,10 +61,16 @@ pub use std::net::Shutdown;
 pub use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
 pub use std::net::{SocketAddr, SocketAddrV4, SocketAddrV6};
 
+#[cfg(not(target_os = "unknown"))]
 pub use addr::ToSocketAddrs;
+#[cfg(not(target_os = "unknown"))]
 pub use tcp::{Incoming, TcpListener, TcpStream};
+#[cfg(not(target_os = "unknown"))]
 pub use udp::UdpSocket;
 
+#[cfg(not(target_os = "unknown"))]
 mod addr;
+#[cfg(not(target_os = "unknown"))]
 mod tcp;
+#[cfg(not(target_os = "unknown"))]
 mod udp;