39 lines
1.2 KiB
Rust
39 lines
1.2 KiB
Rust
//! Example of instantiating of instantiating a wasm module which uses WASI
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//! imports.
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/*
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You can execute this example with:
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cmake example/
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cargo run --example wasi
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*/
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use anyhow::Result;
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use wasmtime::*;
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use wasmtime_wasi::sync::WasiCtxBuilder;
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fn main() -> Result<()> {
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// Define the WASI functions globally on the `Config`.
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let engine = Engine::default();
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let mut linker = Linker::new(&engine);
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wasmtime_wasi::add_to_linker(&mut linker, |s| s)?;
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// Create a WASI context and put it in a Store; all instances in the store
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// share this context. `WasiCtxBuilder` provides a number of ways to
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// configure what the target program will have access to.
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let wasi = WasiCtxBuilder::new()
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.inherit_stdio()
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.inherit_args()?
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.build();
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let mut store = Store::new(&engine, wasi);
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// Instantiate our module with the imports we've created, and run it.
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let module = Module::from_file(&engine, "target/wasm32-wasi/debug/wasi.wasm")?;
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linker.module(&mut store, "", &module)?;
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linker
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.get_default(&mut store, "")?
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.typed::<(), (), _>(&store)?
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.call(&mut store, ())?;
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Ok(())
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}
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