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b69e783164
Previously: * applications were using isc_app as the base unit for running the application and signal handling. * networking was handled in the netmgr layer, which would start a number of threads, each with a uv_loop event loop. * task/event handling was done in the isc_task unit, which used netmgr event loops to run the isc_event calls. In this refactoring: * the network manager now uses isc_loop instead of maintaining its own worker threads and event loops. * the taskmgr that manages isc_task instances now also uses isc_loopmgr, and every isc_task runs on a specific isc_loop bound to the specific thread. * applications have been updated as necessary to use the new API. * new ISC_LOOP_TEST macros have been added to enable unit tests to run isc_loop event loops. unit tests have been updated to use this where needed.
90 lines
2 KiB
C
90 lines
2 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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/*! \file */
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#include <isc/atomic.h>
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#include <isc/netmgr.h>
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#include <isc/util.h>
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#include <dns/view.h>
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#include <ns/client.h>
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#ifdef NETMGR_TRACE
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#define FLARG \
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, const char *file __attribute__((unused)), \
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unsigned int line __attribute__((unused)), \
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const char *func __attribute__((unused))
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#else
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#define FLARG
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#endif
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/*
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* We don't want to use netmgr-based client accounting, we need to emulate it.
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*/
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atomic_uint_fast32_t client_refs[32];
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atomic_uintptr_t client_addrs[32];
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void
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isc__nmhandle_attach(isc_nmhandle_t *source, isc_nmhandle_t **targetp FLARG) {
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ns_client_t *client = (ns_client_t *)source;
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int i;
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for (i = 0; i < 32; i++) {
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if (atomic_load(&client_addrs[i]) == (uintptr_t)client) {
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break;
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}
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}
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INSIST(i < 32);
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INSIST(atomic_load(&client_refs[i]) > 0);
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atomic_fetch_add(&client_refs[i], 1);
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#if 0
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fprintf(stderr, "%s:%s:%s:%d -> %ld\n", __func__, func, file, line,
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client_refs[i]);
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#endif
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*targetp = source;
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return;
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}
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void
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isc__nmhandle_detach(isc_nmhandle_t **handlep FLARG) {
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isc_nmhandle_t *handle = *handlep;
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ns_client_t *client = (ns_client_t *)handle;
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int i;
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*handlep = NULL;
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for (i = 0; i < 32; i++) {
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if (atomic_load(&client_addrs[i]) == (uintptr_t)client) {
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break;
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}
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}
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INSIST(i < 32);
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if (atomic_fetch_sub(&client_refs[i], 1) == 1) {
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dns_view_detach(&client->view);
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client->state = 4;
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ns__client_reset_cb(client);
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ns__client_put_cb(client);
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atomic_store(&client_addrs[i], (uintptr_t)NULL);
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}
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#if 0
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fprintf(stderr, "%s:%s:%s:%d -> %ld\n", __func__, func, file, line,
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client_refs[i]);
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#endif
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return;
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}
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