Implement WASIX context switching API

.github/workflows/test.yaml

@@ -174,34 +174,8 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y git make lld curl
 
-      - name: Download binaryen
-        uses: dsaltares/[email protected]
-        with:
-          repo: WebAssembly/binaryen
-          version: tags/version_123
-          file: binaryen-version_123-x86_64-linux.tar.gz
-          target: binaryen/binaryen.tar.gz
-
-      - name: Unpack binaryen
-        run: |
-          tar -xf binaryen/binaryen.tar.gz -C binaryen --strip-components=1
-          chmod +x binaryen/bin/*
-          export BINARYEN_DIR=$(pwd)/binaryen
-          echo "$BINARYEN_DIR/bin" >> $GITHUB_PATH
-
-      - name: Install wasixcc, sysroot and LLVM
-        run: |
-          export RUST_LOG=wasixcc=trace
-          export GITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }}
-          rustup toolchain install 1.90 --profile minimal --no-self-update
-          cargo +1.90 install wasixcc -F bin
-          mkdir wasixcc-install
-          wasixcc --install-executables ./wasixcc-install
-          echo "$(pwd)/wasixcc-install" >> $GITHUB_PATH
-          mkdir -p ~/.wasixcc/llvm
-          mkdir -p ~/.wasixcc/sysroot
-          wasixcc --download-sysroot v2025-11-06.1
-          wasixcc --download-llvm
+      - name: Install wasixcc
+        uses: wasix-org/wasixcc
 
       - name: Tool versions
         run: |
@@ -896,6 +870,11 @@ jobs:
         run: |
           brew install llvm
           echo "/opt/homebrew/opt/llvm/bin" >> GITHUB_PATH
+
+      - name: Install wasixcc
+        if: matrix.metadata.build != 'windows-x64'
+        uses: wasix-org/wasixcc
+
       - name: Install LLVM
         shell: bash
         if: matrix.metadata.llvm_url

lib/api/Cargo.toml

@@ -133,7 +133,7 @@ sys = ["std", "dep:wasmer-vm", "dep:wasmer-compiler"]
 sys-default = ["sys", "wat", "cranelift"]
 
 # Experimental concurrent execution support
-experimental-async = ["sys", "dep:futures", "dep:corosensei"]
+experimental-async = ["dep:futures", "dep:corosensei"]
 
 # - Compilers.
 compiler = [

lib/api/src/entities/engine/mod.rs

@@ -255,4 +255,14 @@ impl Engine {
             _ => Ok(()),
         }
     }
+
+    #[cfg(feature = "experimental-async")]
+    /// Returns true if the engine supports async operations.
+    pub fn supports_async(&self) -> bool {
+        match self.be {
+            #[cfg(feature = "sys")]
+            BackendEngine::Sys(ref e) => true,
+            _ => false,
+        }
+    }
 }

lib/wasix/Cargo.toml

@@ -18,7 +18,9 @@ wasmer-wasix-types = { path = "../wasi-types", version = "0.601.0", features = [
 	"enable-serde",
 ] }
 wasmer-types = { path = "../types", version = "=6.1.0", default-features = false }
-wasmer = { path = "../api", version = "=6.1.0", default-features = false }
+wasmer = { path = "../api", version = "=6.1.0", default-features = false, features = [
+	"experimental-async",
+] }
 virtual-mio = { path = "../virtual-io", version = "0.601.0", default-features = false }
 virtual-fs = { path = "../virtual-fs", version = "0.601.0", default-features = false, features = [
 	"webc-fs",
@@ -221,7 +223,6 @@ sys = [
 	"ctrlc",
 	"wasmer/wat",
 	"wasmer/js-serializable-module",
-	"wasmer/experimental-async",
 ]
 sys-default = ["sys", "wasmer/sys"]
 sys-poll = []