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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <isc/managers.h>
#include <isc/util.h>
#include "netmgr_p.h"
#include "task_p.h"
#include "timer_p.h"
isc_result_t
isc_managers_create(isc_mem_t *mctx, size_t workers, size_t quantum,
isc_nm_t **netmgrp, isc_taskmgr_t **taskmgrp,
isc_timermgr_t **timermgrp) {
isc_result_t result;
isc_nm_t *netmgr = NULL;
isc_taskmgr_t *taskmgr = NULL;
isc_timermgr_t *timermgr = NULL;
REQUIRE(netmgrp != NULL && *netmgrp == NULL);
isc__netmgr_create(mctx, workers, &netmgr);
*netmgrp = netmgr;
INSIST(netmgr != NULL);
REQUIRE(taskmgrp == NULL || *taskmgrp == NULL);
if (taskmgrp != NULL) {
INSIST(netmgr != NULL);
result = isc__taskmgr_create(mctx, quantum, netmgr, &taskmgr);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR("isc_taskmgr_create() failed: %s",
isc_result_totext(result));
goto fail;
}
*taskmgrp = taskmgr;
}
REQUIRE(timermgrp == NULL || *timermgrp == NULL);
if (timermgrp != NULL) {
result = isc__timermgr_create(mctx, &timermgr);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR("isc_timermgr_create() failed: %s",
isc_result_totext(result));
goto fail;
}
*timermgrp = timermgr;
}
return (ISC_R_SUCCESS);
fail:
isc_managers_destroy(netmgrp, taskmgrp, timermgrp);
return (result);
}
void
isc_managers_destroy(isc_nm_t **netmgrp, isc_taskmgr_t **taskmgrp,
isc_timermgr_t **timermgrp) {
/*
* If we have a taskmgr to clean up, then we must also have a netmgr.
*/
REQUIRE(taskmgrp == NULL || netmgrp != NULL);
/*
* The sequence of operations here is important:
*
* 1. Initiate shutdown of the taskmgr, sending shutdown events to
* all tasks that are not already shutting down.
*/
if (taskmgrp != NULL) {
INSIST(*taskmgrp != NULL);
isc__taskmgr_shutdown(*taskmgrp);
}
/*
* 2. Initiate shutdown of the network manager, freeing clients
* and other resources and preventing new connections, but do
* not stop processing of existing events.
*/
if (netmgrp != NULL) {
INSIST(*netmgrp != NULL);
isc__netmgr_shutdown(*netmgrp);
}
/*
* 3. Finish destruction of the task manager when all tasks
* have completed.
*/
if (taskmgrp != NULL) {
isc__taskmgr_destroy(taskmgrp);
}
/*
* 4. Finish destruction of the netmgr, and wait until all
* references have been released.
*/
if (netmgrp != NULL) {
isc__netmgr_destroy(netmgrp);
}
/*
* 5. Clean up the remaining managers.
*/
if (timermgrp != NULL) {
INSIST(*timermgrp != NULL);
isc__timermgr_destroy(timermgrp);
}
}
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