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Add asynchronous work API to the network manager

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The libuv has a support for running long running tasks in the dedicated
threadpools, so it doesn't affect networking IO.

This commit adds isc_nm_work_enqueue() wrapper that would wraps around
the libuv API and runs it on top of associated worker loop.

The only limitation is that the function must be called from inside
network manager thread, so the call to the function should be wrapped
inside a (bound) task.
This commit is contained in:
Ondřej Surý
2021-05-27 09:45:07 +02:00
committed by Ondřej Surý
parent 211bfefbaa
commit 87fe97ed91
4 changed files with 125 additions and 4 deletions
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19
lib/isc/include/isc/netmgr.h
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@@ -68,6 +68,12 @@ typedef void (*isc_nm_opaquecb_t)(void *arg);
* callbacks.
*/
typedef void (*isc_nm_workcb_t)(void *arg);
typedef void (*isc_nm_after_workcb_t)(void *arg, isc_result_t result);
/*%<
* Callback functions for libuv threadpool work (see uv_work_t)
*/
void
isc_nm_attach(isc_nm_t *mgr, isc_nm_t **dst);
void
@@ -529,6 +535,19 @@ isc_nm_task_enqueue(isc_nm_t *mgr, isc_task_t *task, int threadid);
* maximum number of 'workers' as specifed in isc_nm_start()
*/
void
isc_nm_work_offload(isc_nm_t *mgr, isc_nm_workcb_t work_cb,
isc_nm_after_workcb_t after_work_cb, void *data);
/*%<
* Schedules a job to be handled by the libuv thread pool (see uv_work_t).
* The function specified in `work_cb` will be run by a thread in the
* thread pool; when complete, the `after_work_cb` function will run.
*
* Requires:
* \li 'mgr' is a valid netmgr object.
* \li We are currently running in a network manager thread.
*/
void
isc__nm_force_tid(int tid);
/*%<