pub struct FfiCallback { /* private fields */ }Expand description
FfiCallback owns a libffi Closure that exposes a C-callable
extern "C" fn(...) which dispatches to a JavaScript function. The
closure’s userdata is heap-allocated and kept alive for the lifetime of
this struct, so the closure (and its code pointer) stay valid until
.close() is called or the JS wrapper is GC’d.
@trace REQ-ENG-009 [entity:FfiCallback]
Implementations§
Source§impl FfiCallback
impl FfiCallback
Sourcepub fn new(
cx: *mut JSContext,
js_fn: *mut JSObject,
arg_types: Vec<TypeSpec>,
ret: TypeSpec,
) -> FfiCallback
pub fn new( cx: *mut JSContext, js_fn: *mut JSObject, arg_types: Vec<TypeSpec>, ret: TypeSpec, ) -> FfiCallback
Build a callback with the given argument types and return type that
invokes js_fn on cx. Returns the C code pointer the closure
exposes (suitable for handing to dlsym-resolved call sites that
accept extern "C" fn(...) — e.g. qsort comparators, atexit hooks).
Auto Trait Implementations§
impl !Send for FfiCallback
impl !Sync for FfiCallback
impl Freeze for FfiCallback
impl RefUnwindSafe for FfiCallback
impl Unpin for FfiCallback
impl UnsafeUnpin for FfiCallback
impl UnwindSafe for FfiCallback
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