Type Alias mozjs::jsapi::TransferStructuredCloneOp
source · pub type TransferStructuredCloneOp = Option<unsafe extern "C" fn(_: *mut JSContext, _: Handle<*mut JSObject>, _: *mut c_void, _: *mut u32, _: *mut TransferableOwnership, _: *mut *mut c_void, _: *mut u64) -> bool>;
Expand description
Called when JS_WriteStructuredClone receives a transferable object not handled by the engine. If this hook does not exist or returns false, the JS engine will call the reportError hook or fall back to throwing a DATA_CLONE_ERR DOM Exception. This method is called before any other callback.
tag: indicates what type of transferable this is. Must be greater than 0xFFFF0201 (value of the internal SCTAG_TRANSFER_MAP_PENDING_ENTRY)
ownership: see TransferableOwnership, above. Used to communicate any needed ownership info to the FreeTransferStructuredCloneOp.
content, extraData: what the ReadTransferStructuredCloneOp will receive
Aliased Type§
enum TransferStructuredCloneOp {
None,
Some(unsafe extern "C" fn(_: *mut JSContext, _: Handle<*mut JSObject>, _: *mut c_void, _: *mut u32, _: *mut TransferableOwnership, _: *mut *mut c_void, _: *mut u64) -> bool),
}
Variants§
None
No value.
Some(unsafe extern "C" fn(_: *mut JSContext, _: Handle<*mut JSObject>, _: *mut c_void, _: *mut u32, _: *mut TransferableOwnership, _: *mut *mut c_void, _: *mut u64) -> bool)
Some value of type T
.
Trait Implementations§
source§impl<T: CustomTrace> CustomTrace for Option<T>
impl<T: CustomTrace> CustomTrace for Option<T>
source§impl<T: FromJSValConvertible> FromJSValConvertible for Option<T>
impl<T: FromJSValConvertible> FromJSValConvertible for Option<T>
§type Config = <T as FromJSValConvertible>::Config
type Config = <T as FromJSValConvertible>::Config
Optional configurable behaviour switch; use () for no configuration.
source§unsafe fn from_jsval(
cx: *mut JSContext,
value: HandleValue<'_>,
option: T::Config
) -> Result<ConversionResult<Option<T>>, ()>
unsafe fn from_jsval( cx: *mut JSContext, value: HandleValue<'_>, option: T::Config ) -> Result<ConversionResult<Option<T>>, ()>
Convert
val
to type Self
.
Optional configuration of type T
can be passed as the option
argument.
If it returns Err(())
, a JSAPI exception is pending.
If it returns Ok(Failure(reason))
, there is no pending JSAPI exception.