32 releases (stable)
1.15.0 | Feb 29, 2024 |
---|---|
1.13.0 | Jan 9, 2024 |
1.12.0 | Nov 25, 2023 |
1.8.0 | Jul 24, 2023 |
0.0.2 | Oct 27, 2020 |
#26 in WebAssembly
2,387 downloads per month
Used in 3 crates
(2 directly)
39KB
816 lines
Wasmtime Engine Provider
This is a pluggable engine provider for the waPC RPC exchange protocol. This engine implements WebAssemblyEngineProvider
for the the Bytecode Alliance's wasmtime WebAssembly runtime.
Running ping demo
$ cargo run -p wasmtime-provider --example wasmtime-demo ./wasm/crates/wasm-basic/build/wasm_basic.wasm ping "hi"
Running codec and module hotswapping demo
cargo run -p wasmtime-provider --example wasmtime-hash-mreplace AlexName
Example
use wasmtime_provider::WasmtimeEngineProviderBuilder;
use wapc::WapcHost;
use std::error::Error;
pub fn main() -> Result<(), Box<dyn Error>> {
// Sample host callback that prints the operation a WASM module requested.
let host_callback = |id: u64, bd: &str, ns: &str, op: &str, payload: &[u8]| {
println!("Guest {} invoked '{}->{}:{}' with a {} byte payload",
id, bd, ns, op, payload.len());
// Return success with zero-byte payload.
Ok(vec![])
};
let file = "../../wasm/crates/wasm-basic/build/wasm_basic.wasm";
let module_bytes = std::fs::read(file)?;
let engine = WasmtimeEngineProviderBuilder::new()
.module_bytes(&module_bytes)
.build()?;
let host = WapcHost::new(Box::new(engine), Some(Box::new(host_callback)))?;
let res = host.call("ping", b"payload bytes")?;
assert_eq!(res, b"payload bytes");
Ok(())
}
See also
Dependencies
~10–22MB
~323K SLoC