0f5bdc6497
* wasmtime-wasi: re-exporting this WasiCtxBuilder was shadowing the right one wasi-common's WasiCtxBuilder is really only useful wasi_cap_std_sync and wasi_tokio to implement their own Builder on top of. This re-export of wasi-common's is 1. not useful and 2. shadow's the re-export of the right one in sync::*. * wasi-common: eliminate WasiCtxBuilder, make the builder methods on WasiCtx instead * delete wasi-common::WasiCtxBuilder altogether just put those methods directly on &mut WasiCtx. As a bonus, the sync and tokio WasiCtxBuilder::build functions are no longer fallible! * bench fixes * more test fixes
40 lines
1.3 KiB
Rust
40 lines
1.3 KiB
Rust
//! Example of instantiating two modules which link to each other.
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// You can execute this example with `cargo run --example linking`
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use anyhow::Result;
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use wasmtime::*;
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use wasmtime_wasi::sync::{Wasi, WasiCtxBuilder};
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fn main() -> Result<()> {
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let engine = Engine::default();
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let store = Store::new(&engine);
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// First set up our linker which is going to be linking modules together. We
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// want our linker to have wasi available, so we set that up here as well.
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let mut linker = Linker::new(&store);
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let wasi = Wasi::new(
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&store,
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WasiCtxBuilder::new()
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.inherit_stdio()
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.inherit_args()?
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.build(),
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);
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wasi.add_to_linker(&mut linker)?;
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// Load and compile our two modules
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let linking1 = Module::from_file(&engine, "examples/linking1.wat")?;
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let linking2 = Module::from_file(&engine, "examples/linking2.wat")?;
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// Instantiate our first module which only uses WASI, then register that
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// instance with the linker since the next linking will use it.
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let linking2 = linker.instantiate(&linking2)?;
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linker.instance("linking2", &linking2)?;
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// And with that we can perform the final link and the execute the module.
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let linking1 = linker.instantiate(&linking1)?;
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let run = linking1.get_typed_func::<(), ()>("run")?;
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run.call(())?;
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Ok(())
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}
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