chore: update to latest wasi:io WIT (#26)

Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>

wit/caching.wit

@@ -11,7 +11,7 @@
 // Time-to-Live values (within the usual limitations around time in a
 // distributed setting).
 interface cache {
-    use wasi:poll/poll.{pollable}
+    use wasi:io/poll.{pollable}
     use types.{key, incoming-value, outgoing-value, error}
 
     // The `get` operation returns the value passed by a previous `set` for the

wit/deps.lock

@@ -1,9 +1,4 @@
 [io]
 url = "https://github.com/WebAssembly/wasi-io/archive/main.tar.gz"
-sha256 = "6e18239b0e20d1a3e6343cb961ebfd2c663ba7feb4c1aa3744b756fbdd1fb5b8"
-sha512 = "53169b6e4fba0b2cf5fcf808f76e7fbb7cabb6ed66ab53f77d0966e7448312ccbe8571880ef4fc2ee86fbd6ba19bc48d46e10d22dcac6c51d217e8d7127c32db"
-
-[poll]
-url = "https://github.com/WebAssembly/wasi-poll/archive/main.tar.gz"
-sha256 = "d4c27124f4c137eb538b5c92ba5858ed9042e11b24a2eef85d14becd0b7f55de"
-sha512 = "422c01b273b4b1377ece6f2e4ba0dfc609ca8ef30a3e0be0e172e1303fcf7b3ca4c470f4dea6c51bdf114b0f5c871ebc4934dfe3bf217d66ea689748df2b1e55"
+sha256 = "a00c29dd57dc224e8ce28b793b19c1b1001dcdbdc229ed451c3df1db91841b34"
+sha512 = "8558085eeb5689209101cdfbc9782953d559ad14ce77260fe2f7cc472482d568f65cad9e6a688d40c634c6c54c608f27e27e481633446114d6fdead93d4e34c5"

wit/deps.toml

@@ -1,2 +1 @@
 io = "https://github.com/WebAssembly/wasi-io/archive/main.tar.gz"
-poll = "https://github.com/WebAssembly/wasi-poll/archive/main.tar.gz"

wit/deps/io/poll.wit

@@ -0,0 +1,34 @@
+package wasi:io;
+
+/// A poll API intended to let users wait for I/O events on multiple handles
+/// at once.
+interface poll {
+    /// A "pollable" handle.
+    resource pollable;
+
+    /// Poll for completion on a set of pollables.
+    ///
+    /// This function takes a list of pollables, which identify I/O sources of
+    /// interest, and waits until one or more of the events is ready for I/O.
+    ///
+    /// The result `list<u32>` contains one or more indices of handles in the
+    /// argument list that is ready for I/O.
+    ///
+    /// If the list contains more elements than can be indexed with a `u32`
+    /// value, this function traps.
+    ///
+    /// A timeout can be implemented by adding a pollable from the
+    /// wasi-clocks API to the list.
+    ///
+    /// This function does not return a `result`; polling in itself does not
+    /// do any I/O so it doesn't fail. If any of the I/O sources identified by
+    /// the pollables has an error, it is indicated by marking the source as
+    /// being reaedy for I/O.
+    poll-list: func(in: list<borrow<pollable>>) -> list<u32>;
+
+    /// Poll for completion on a single pollable.
+    ///
+    /// This function is similar to `poll-list`, but operates on only a single
+    /// pollable. When it returns, the handle is ready for I/O.
+    poll-one: func(in: borrow<pollable>);
+}