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[oden-js] Ensure callbacks have 'static lifetime

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Because we smuggle them through we need to make sure they're not
holding references that will go invalid- we can make no promises about
how long they stay alive. Although maybe bounding to context lifetime
is OK? But anyway.
This commit is contained in:
John Doty 2023-06-21 22:02:07 -07:00
parent 14f9eb655f
commit e36ab17235
3 changed files with 8 additions and 8 deletions
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4
oden-js/src/callback.rs
View file

@ -3,9 +3,9 @@ use oden_js_sys as sys;
use std::ffi::c_int;
use std::panic::catch_unwind;
pub trait Callback: Fn(&ContextRef, &ValueRef, &[&ValueRef]) -> ValueResult {}
pub trait Callback: 'static + Fn(&ContextRef, &ValueRef, &[&ValueRef]) -> ValueResult {}
impl<T> Callback for T where T: Fn(&ContextRef, &ValueRef, &[&ValueRef]) -> ValueResult {}
impl<T> Callback for T where T: 'static + Fn(&ContextRef, &ValueRef, &[&ValueRef]) -> ValueResult {}
struct CallbackObject<T: Callback> {
callback: T,

8
oden-js/src/context.rs
View file

@ -169,14 +169,14 @@ impl ContextRef {
}
/// Construct a new value that wraps a strongly-typed closure.
pub fn new_fn<F>(&self, func: impl RustFunction<F>) -> ValueResult {
self.new_dynamic_fn(|c, _, a| func.call(c, a))
pub fn new_fn<F>(&self, func: impl RustFunction<F> + 'static) -> ValueResult {
self.new_dynamic_fn(move |c, _, a| func.call(c, a))
}
/// Construct a new value that wraps a dynamically-typed closure.
pub fn new_dynamic_fn<F>(&self, func: F) -> ValueResult
where
F: Fn(&ContextRef, &ValueRef, &[&ValueRef]) -> ValueResult,
F: 'static + Fn(&ContextRef, &ValueRef, &[&ValueRef]) -> ValueResult,
{
// Constructing a new function is complicated enough that it needs to
// be out of line.
@ -472,7 +472,7 @@ mod tests {
go.set_property(
&ctx,
"foo",
&ctx.new_dynamic_fn(|c, _, _| Ok(return_value.dup(c)))
&ctx.new_dynamic_fn(move |c, _, _| Ok(return_value.dup(c)))
.unwrap(),
)
.unwrap();

4
oden-js/src/value.rs
View file

@ -270,7 +270,7 @@ impl ValueRef {
&mut self,
ctx: &ContextRef,
prop: &str,
func: impl RustFunction<F>,
func: impl RustFunction<F> + 'static,
) -> Result<()> {
let vr: Value = ctx.new_fn(func)?;
self.set_property(ctx, prop, &vr)
@ -278,7 +278,7 @@ impl ValueRef {
pub fn set_dynamic_method<F>(&mut self, ctx: &ContextRef, prop: &str, func: F) -> Result<()>
where
F: Fn(&ContextRef, &ValueRef, &[&ValueRef]) -> Result<Value>,
F: 'static + Fn(&ContextRef, &ValueRef, &[&ValueRef]) -> Result<Value>,
{
let vr: Value = ctx.new_dynamic_fn(func)?;
self.set_property(ctx, prop, &vr)