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-rw-r--r--lib/isc/managers.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/lib/isc/managers.c b/lib/isc/managers.c
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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"
+
+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_result_t result;
+ isc_taskmgr_t *taskmgr = NULL;
+ isc_nm_t *netmgr = 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(__FILE__, __LINE__,
+ "isc_managers_create() failed: %s",
+ isc_result_totext(result));
+ goto fail;
+ }
+ *taskmgrp = taskmgr;
+ }
+
+ return (ISC_R_SUCCESS);
+fail:
+ isc_managers_destroy(netmgrp, taskmgrp);
+
+ return (result);
+}
+
+void
+isc_managers_destroy(isc_nm_t **netmgrp, isc_taskmgr_t **taskmgrp) {
+ /*
+ * 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);
+ }
+}