mirror of
https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-23 02:28:55 +00:00
194621a74e
When the loopmanager is shutting down following a signal, `dig` and `host` should stop cleanly. Before this commit they were oblivious to ISC_R_SHUTTINGDOWN. The `isc_signal` callbacks now report this kind of mistake with a stack backtrace.
101 lines
2.2 KiB
C
101 lines
2.2 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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#include <stdlib.h>
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#include <isc/loop.h>
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#include <isc/signal.h>
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#include <isc/uv.h>
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#include "loop_p.h"
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isc_signal_t *
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isc_signal_new(isc_loopmgr_t *loopmgr, isc_signal_cb cb, void *cbarg,
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int signum) {
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isc_loop_t *loop = NULL;
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isc_signal_t *signal = NULL;
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int r;
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loop = DEFAULT_LOOP(loopmgr);
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signal = isc_mem_get(isc_loop_getmctx(loop), sizeof(*signal));
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*signal = (isc_signal_t){
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.magic = SIGNAL_MAGIC,
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.cb = cb,
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.cbarg = cbarg,
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.signum = signum,
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};
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isc_loop_attach(loop, &signal->loop);
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r = uv_signal_init(&loop->loop, &signal->signal);
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UV_RUNTIME_CHECK(uv_signal_init, r);
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uv_handle_set_data((uv_handle_t *)&signal->signal, signal);
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return (signal);
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}
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static void
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isc__signal_destroy_cb(uv_handle_t *handle) {
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isc_signal_t *signal = uv_handle_get_data(handle);
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isc_loop_t *loop = NULL;
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REQUIRE(VALID_SIGNAL(signal));
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loop = signal->loop;
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isc_mem_put(loop->mctx, signal, sizeof(*signal));
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isc_loop_detach(&loop);
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}
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void
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isc_signal_destroy(isc_signal_t **signalp) {
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isc_signal_t *signal = NULL;
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REQUIRE(signalp != NULL);
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REQUIRE(VALID_SIGNAL(*signalp));
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signal = *signalp;
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*signalp = NULL;
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uv_close((uv_handle_t *)&signal->signal, isc__signal_destroy_cb);
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}
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void
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isc_signal_stop(isc_signal_t *signal) {
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int r;
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REQUIRE(VALID_SIGNAL(signal));
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r = uv_signal_stop(&signal->signal);
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UV_RUNTIME_CHECK(uv_signal_stop, r);
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}
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static void
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isc__signal_cb(uv_signal_t *handle, int signum) {
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isc_signal_t *signal = uv_handle_get_data((uv_handle_t *)handle);
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REQUIRE(VALID_SIGNAL(signal));
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REQUIRE(signum == signal->signum);
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signal->cb(signal->cbarg, signum);
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}
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void
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isc_signal_start(isc_signal_t *signal) {
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int r;
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REQUIRE(VALID_SIGNAL(signal));
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r = uv_signal_start(&signal->signal, isc__signal_cb, signal->signum);
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UV_RUNTIME_CHECK(uv_signal_start, r);
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}
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