pub fn add_to_linker_sync<T: Send>(
linker: &mut Linker<T>,
f: impl Fn(&mut T) -> &mut WasiP1Ctx + Copy + Send + Sync + 'static,
) -> Result<()>
Available on crate feature
preview1
only.Expand description
Adds synchronous versions of all WASIp1 functions to the
[wasmtime::Linker
] provided.
This method will add WASIp1 functions to linker
. The f
closure provided
is used to project from the T
state that Linker
is associated with to a
WasiP1Ctx
. If T
is WasiP1Ctx
itself then this is the identity
closure, but otherwise it must project out the field where WasiP1Ctx
is
stored within T
.
The state provided by f
is used to implement all WASIp1 functions and
provides configuration to know what to return.
Note that this function is intended for use with
Config::async_support(false)
. If you’re looking for a synchronous version
see add_to_linker_async
.
§Examples
If the T
in Linker<T>
is just WasiP1Ctx
:
use wasmtime::{Result, Linker, Engine, Config};
use wasmtime_wasi::preview1::{self, WasiP1Ctx};
fn main() -> Result<()> {
let mut config = Config::new();
config.async_support(true);
let engine = Engine::new(&config)?;
let mut linker: Linker<WasiP1Ctx> = Linker::new(&engine);
preview1::add_to_linker_async(&mut linker, |cx| cx)?;
// ... continue to add more to `linker` as necessary and use it ...
Ok(())
}
If the T
in Linker<T>
is custom state:
use wasmtime::{Result, Linker, Engine, Config};
use wasmtime_wasi::preview1::{self, WasiP1Ctx};
struct MyState {
// .. other custom state here ..
wasi: WasiP1Ctx,
}
fn main() -> Result<()> {
let mut config = Config::new();
config.async_support(true);
let engine = Engine::new(&config)?;
let mut linker: Linker<MyState> = Linker::new(&engine);
preview1::add_to_linker_async(&mut linker, |cx| &mut cx.wasi)?;
// ... continue to add more to `linker` as necessary and use it ...
Ok(())
}