Function call_post_return

crates/wasmtime/src/runtime/component/func.rs:705–733

(
    mut store: impl AsContextMut,
    func: Option<NonNull<VMFuncRef>>,
    arg: ValRaw,
    mut flags: InstanceFlags,
)

}

pub(crate) unsafe fn call_post_return(
    mut store: impl AsContextMut,
    func: Option<NonNull<VMFuncRef>>,
    arg: ValRaw,
    mut flags: InstanceFlags,
) -> Result<()> {
    unsafe {
        // Post return functions are forbidden from calling imports or
        // intrinsics.
        flags.set_may_leave(false);

        // If the function actually had a `post-return` configured in its
        // canonical options that's executed here.
        if let Some(func) = func {
            crate::Func::call_unchecked_raw(
                &mut store.as_context_mut(),
                func,
                core::slice::from_ref(&arg).into(),
            )?;
        }

        // And finally if everything completed successfully then the "may
        // leave" flags is set to `true` again here which enables further
        // use of the component.
        flags.set_may_leave(true);
    }

    Ok(())
}