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Add helper function to get the start function

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This commit is contained in:
Mark McCaskey
2020-08-12 18:03:57 -07:00
parent cba35df3f1
commit 8a9ac6ce59
3 changed files with 30 additions and 3 deletions
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18
lib/c-api/src/wasm_c_api/wasi/mod.rs
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@@ -4,7 +4,9 @@
mod capture_files;
use super::{wasm_extern_t, wasm_instance_t, wasm_module_t, wasm_store_t};
use super::{
wasm_extern_t, wasm_func_t, wasm_instance_t, wasm_memory_t, wasm_module_t, wasm_store_t,
};
// required due to really weird Rust resolution rules for macros
// https://github.com/rust-lang/rust/issues/57966
use crate::c_try;
@@ -126,6 +128,11 @@ pub extern "C" fn wasi_env_set_instance(env: &mut wasi_env_t, instance: &wasm_in
true
}
#[no_mangle]
pub extern "C" fn wasi_env_set_memory(env: &mut wasi_env_t, memory: &wasm_memory_t) {
env.inner.set_memory(memory.inner.clone());
}
#[no_mangle]
pub unsafe extern "C" fn wasi_env_read_stdout(
env: &mut wasi_env_t,
@@ -278,6 +285,15 @@ unsafe extern "C" fn wasi_get_imports_inner(
Some(())
}
#[no_mangle]
pub unsafe fn wasi_get_start_function(instance: &mut wasm_instance_t) -> Option<Box<wasm_func_t>> {
let f = c_try!(instance.inner.exports.get_function("_start"));
Some(Box::new(wasm_func_t {
inner: f.clone(),
instance: Some(instance.inner.clone()),
}))
}
/// Delete a `wasm_extern_t` allocated by the API.
#[no_mangle]
pub unsafe fn wasm_extern_delete(_item: Option<Box<wasm_extern_t>>) {}