API Collection | XPC
Respond on demand to IOKit events and notifications.
Event handling
- xpc_set_event_stream_handler(_:_:_:))
func xpc_set_event_stream_handler(UnsafePointer<CChar>, dispatch_queue_t?, (xpc_object_t) -> Void)— Sets the event handler to invoke when receiving streamed events. - XPC_EVENT_KEY_NAME
let XPC_EVENT_KEY_NAME: UnsafePointer<CChar>— A key for querying an XPC event dictionary to retrieve a string that identifies the event.
XPC_EVENT_KEY_NAME
Global Variable | XPC
A key for querying an XPC event dictionary to retrieve a string that identifies the event.
nonisolated(unsafe) let XPC_EVENT_KEY_NAME: UnsafePointer<CChar>See Also
Event handling
xpc_set_event_stream_handler(_:_:_:)
Function | XPC
Sets the event handler to invoke when receiving streamed events.
func xpc_set_event_stream_handler(_ stream: UnsafePointer<CChar>, _ targetq: dispatch_queue_t?, _ handler: @escaping @Sendable (xpc_object_t) -> Void)Multiple calls to this function for the same event stream will result in undefined behavior.
Parameters
- stream: The name of the event stream for which this handler will be invoked.
- targetq: The GCD queue to which the event handler block will be submitted. This parameter may be NULL, in which case the connection’s target queue will be the default target queue of
libdispatch, defined asDISPATCH_TARGET_QUEUE_DEFAULT. - handler: The event handler block. The event which this block receives as its first parameter will always be a dictionary which contains the XPC_EVENT_KEY_NAME key. The value for this key will be a string whose value is the name assigned to the XPC event specified in the
launchd.plist. Future keys may be added to this dictionary.