mirror of
https://gitlab.isc.org/isc-projects/bind9
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8e5e0fa522
Instead of using isc_once_do() on every isc_mutex_init() call, use the global library constructor to initialize the default mutex attr object (optionally with PTHREAD_MUTEX_ADAPTIVE_NP if supported) just once when the library is loaded.
62 lines
1.4 KiB
C
62 lines
1.4 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 <errno.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <sys/time.h>
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#include <time.h>
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#include <isc/mutex.h>
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#include <isc/once.h>
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#include <isc/print.h>
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#include <isc/strerr.h>
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#include <isc/string.h>
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#include <isc/util.h>
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#include "mutex_p.h"
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pthread_mutexattr_t isc__mutex_init_attr;
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static isc_once_t init_once = ISC_ONCE_INIT;
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static void
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mutex_initialize(void) {
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RUNTIME_CHECK(pthread_mutexattr_init(&isc__mutex_init_attr) == 0);
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#ifdef HAVE_PTHREAD_MUTEX_ADAPTIVE_NP
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RUNTIME_CHECK(pthread_mutexattr_settype(&isc__mutex_init_attr,
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PTHREAD_MUTEX_ADAPTIVE_NP) ==
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0);
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#endif /* HAVE_PTHREAD_MUTEX_ADAPTIVE_NP */
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}
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void
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isc__mutex_initialize(void) {
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RUNTIME_CHECK(isc_once_do(&init_once, mutex_initialize) ==
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ISC_R_SUCCESS);
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}
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void
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isc__mutex_init(isc_mutex_t *mp) {
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int err;
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err = pthread_mutex_init(mp, &isc__mutex_init_attr);
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ERRNO_CHECK(pthread_mutex_init, err);
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}
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void
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isc__mutex_shutdown(void) {
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/* noop */;
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}
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