wasmtime_c_api/
engine.rs

1use crate::wasm_config_t;
2use wasmtime::Engine;
3
4#[repr(C)]
5#[derive(Clone)]
6pub struct wasm_engine_t {
7    pub(crate) engine: Engine,
8}
9
10wasmtime_c_api_macros::declare_own!(wasm_engine_t);
11
12#[unsafe(no_mangle)]
13pub extern "C" fn wasm_engine_new() -> Box<wasm_engine_t> {
14    // Enable the `env_logger` crate since this is as good a place as any to
15    // support some "top level initialization" for the C API. Almost all support
16    // should go through this one way or another, so this ensures that
17    // `RUST_LOG` should work reasonably well.
18    //
19    // Note that we `drop` the result here since this fails after the first
20    // initialization attempt. We don't mind that though because this function
21    // can be called multiple times, so we just ignore the result.
22    #[cfg(feature = "logging")]
23    drop(env_logger::try_init());
24
25    Box::new(wasm_engine_t {
26        engine: Engine::default(),
27    })
28}
29
30#[unsafe(no_mangle)]
31pub extern "C" fn wasm_engine_new_with_config(c: Box<wasm_config_t>) -> Box<wasm_engine_t> {
32    #[cfg(feature = "logging")]
33    drop(env_logger::try_init());
34
35    let config = c.config;
36    Box::new(wasm_engine_t {
37        engine: Engine::new(&config).unwrap(),
38    })
39}
40
41#[unsafe(no_mangle)]
42pub extern "C" fn wasmtime_engine_clone(engine: &wasm_engine_t) -> Box<wasm_engine_t> {
43    Box::new(engine.clone())
44}
45
46#[unsafe(no_mangle)]
47pub extern "C" fn wasmtime_engine_increment_epoch(engine: &wasm_engine_t) {
48    engine.engine.increment_epoch();
49}
50
51#[unsafe(no_mangle)]
52pub extern "C" fn wasmtime_engine_is_pulley(engine: &wasm_engine_t) -> bool {
53    engine.engine.is_pulley()
54}
wasmtime_c_api/engine.rs

wasmtime_c_api/
engine.rs
