1 /* $NetBSD: managers.c,v 1.1 2024/02/18 20:57:49 christos Exp $ */
2
3 /*
4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
5 *
6 * SPDX-License-Identifier: MPL-2.0
7 *
8 * This Source Code Form is subject to the terms of the Mozilla Public
9 * License, v. 2.0. If a copy of the MPL was not distributed with this
10 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
11 *
12 * See the COPYRIGHT file distributed with this work for additional
13 * information regarding copyright ownership.
14 */
15
16 #include <isc/managers.h>
17 #include <isc/util.h>
18
19 #include "netmgr_p.h"
20 #include "task_p.h"
21
22 isc_result_t
isc_managers_create(isc_mem_t * mctx,size_t workers,size_t quantum,isc_nm_t ** netmgrp,isc_taskmgr_t ** taskmgrp)23 isc_managers_create(isc_mem_t *mctx, size_t workers, size_t quantum,
24 isc_nm_t **netmgrp, isc_taskmgr_t **taskmgrp) {
25 isc_result_t result;
26 isc_taskmgr_t *taskmgr = NULL;
27 isc_nm_t *netmgr = NULL;
28
29 REQUIRE(netmgrp != NULL && *netmgrp == NULL);
30 isc__netmgr_create(mctx, workers, &netmgr);
31 *netmgrp = netmgr;
32 INSIST(netmgr != NULL);
33
34 REQUIRE(taskmgrp == NULL || *taskmgrp == NULL);
35 if (taskmgrp != NULL) {
36 INSIST(netmgr != NULL);
37 result = isc__taskmgr_create(mctx, quantum, netmgr, &taskmgr);
38 if (result != ISC_R_SUCCESS) {
39 UNEXPECTED_ERROR(__FILE__, __LINE__,
40 "isc_managers_create() failed: %s",
41 isc_result_totext(result));
42 goto fail;
43 }
44 *taskmgrp = taskmgr;
45 }
46
47 return (ISC_R_SUCCESS);
48 fail:
49 isc_managers_destroy(netmgrp, taskmgrp);
50
51 return (result);
52 }
53
54 void
isc_managers_destroy(isc_nm_t ** netmgrp,isc_taskmgr_t ** taskmgrp)55 isc_managers_destroy(isc_nm_t **netmgrp, isc_taskmgr_t **taskmgrp) {
56 /*
57 * If we have a taskmgr to clean up, then we must also have a netmgr.
58 */
59 REQUIRE(taskmgrp != NULL || netmgrp == NULL);
60
61 /*
62 * The sequence of operations here is important:
63 *
64 * 1. Initiate shutdown of the taskmgr, sending shutdown events to
65 * all tasks that are not already shutting down.
66 */
67 if (taskmgrp != NULL) {
68 INSIST(*taskmgrp != NULL);
69 isc__taskmgr_shutdown(*taskmgrp);
70 }
71
72 /*
73 * 2. Initiate shutdown of the network manager, freeing clients
74 * and other resources and preventing new connections, but do
75 * not stop processing of existing events.
76 */
77 if (netmgrp != NULL) {
78 INSIST(*netmgrp != NULL);
79 isc__netmgr_shutdown(*netmgrp);
80 }
81
82 /*
83 * 3. Finish destruction of the task manager when all tasks
84 * have completed.
85 */
86 if (taskmgrp != NULL) {
87 isc__taskmgr_destroy(taskmgrp);
88 }
89
90 /*
91 * 4. Finish destruction of the netmgr, and wait until all
92 * references have been released.
93 */
94 if (netmgrp != NULL) {
95 isc__netmgr_destroy(netmgrp);
96 }
97 }
98