first draft of async lift/lower for Rust generator

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

more work on async lift/lower

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

emit callback (and no post-return) for async exports

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

flesh out async support

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

flesh out async_support.rs

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

add future and stream support

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

support `task.wait`

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

compile fixes

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

Author: dicej

Cargo.lock

@@ -32,11 +32,11 @@ indexmap = "2.0.0"
 prettyplease = "0.2.20"
 syn = { version = "2.0", features = ["printing"] }
 
-wasmparser = "0.217.0"
-wasm-encoder = "0.217.0"
-wasm-metadata = "0.217.0"
-wit-parser = "0.217.0"
-wit-component = "0.217.0"
+wasmparser = { path = "../wasm-tools/crates/wasmparser" }#{ git = "https://github.com/dicej/wasm-tools", branch = "async" }
+wasm-encoder = { path = "../wasm-tools/crates/wasm-encoder" }#{ git = "https://github.com/dicej/wasm-tools", branch = "async" }
+wasm-metadata = { path = "../wasm-tools/crates/wasm-metadata" }#{ git = "https://github.com/dicej/wasm-tools", branch = "async" }
+wit-parser = { path = "../wasm-tools/crates/wit-parser" }#{ git = "https://github.com/dicej/wasm-tools", branch = "async" }
+wit-component = { path = "../wasm-tools/crates/wit-component" }#{ git = "https://github.com/dicej/wasm-tools", branch = "async" }
 
 wit-bindgen-core = { path = 'crates/core', version = '0.32.0' }
 wit-bindgen-c = { path = 'crates/c', version = '0.32.0' }

Cargo.toml

@@ -1750,6 +1750,7 @@ impl InterfaceGenerator<'_> {
             LiftLower::LowerArgsLiftResults,
             func,
             &mut f,
+            false,
         );
 
         let FunctionBindgen {
@@ -1822,6 +1823,7 @@ impl InterfaceGenerator<'_> {
             LiftLower::LiftArgsLowerResults,
             func,
             &mut f,
+            false,
         );
         let FunctionBindgen { src, .. } = f;
         self.src.c_adapters(&src);
@@ -1852,7 +1854,7 @@ impl InterfaceGenerator<'_> {
 
             let mut f = FunctionBindgen::new(self, c_sig, &import_name);
             f.params = params;
-            abi::post_return(f.gen.resolve, func, &mut f);
+            abi::post_return(f.gen.resolve, func, &mut f, false);
             let FunctionBindgen { src, .. } = f;
             self.src.c_fns(&src);
             self.src.c_fns("}\n");
@@ -2753,7 +2755,7 @@ impl Bindgen for FunctionBindgen<'_, '_> {
                 self.src.push_str(");\n");
             }
 
-            Instruction::CallInterface { func } => {
+            Instruction::CallInterface { func, .. } => {
                 let mut args = String::new();
                 for (i, (op, (byref, _))) in operands.iter().zip(&self.sig.params).enumerate() {
                     if i > 0 {