#include <runtime.h>

Data Fields
mln_resource_request_cancel_callback	callback
void *	user_data
mln_user_data_release	release_user_data
mln_delivery_queue	queue

Detailed Description

Cancel callback or queue state for one handled resource request.

The struct itself is borrowed for the registering call. Exactly one of callback and queue is set.

Field Documentation

◆ callback

mln_resource_request_cancel_callback mln_resource_request_cancel_handler::callback

Required in callback mode; null in queue mode.

◆ queue

mln_delivery_queue mln_resource_request_cancel_handler::queue

Optional. Queue delivery in place of callback: a cancel is copied into one MLN_DELIVERY_TYPE_RESOURCE_REQUEST_CANCEL delivery carrying user_data, and one MLN_DELIVERY_TYPE_RETIRED delivery follows where callback mode runs release_user_data. The registration rejects an invalid queue handle with MLN_STATUS_INVALID_ARGUMENT and a released queue with MLN_STATUS_INVALID_STATE.

◆ release_user_data

mln_user_data_release mln_resource_request_cancel_handler::release_user_data

Optional. Releases user_data exactly once for an accepted registration, after the callback can no longer run: when the callback returns, on the thread that ran it, or when the request is released without the callback having run, on the releasing thread. It never runs for a rejected registration or for a request that was already cancelled. Null in queue mode.

◆ user_data

void* mln_resource_request_cancel_handler::user_data

Opaque host token in queue mode; native code never dereferences it.

The documentation for this struct was generated from the following file: