/* $NetBSD: mutex.c,v 1.2.4.2 2024/02/29 12:35:01 martin Exp $ */ /* * 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. */ /*! \file */ #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_PTHREAD_MUTEX_ADAPTIVE_NP static bool attr_initialized = false; static pthread_mutexattr_t attr; static isc_once_t once_attr = ISC_ONCE_INIT; static void initialize_attr(void) { RUNTIME_CHECK(pthread_mutexattr_init(&attr) == 0); RUNTIME_CHECK(pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ADAPTIVE_NP) == 0); attr_initialized = true; } #endif /* HAVE_PTHREAD_MUTEX_ADAPTIVE_NP */ int isc__mutex_init(isc_mutex_t *mp) { #ifdef HAVE_PTHREAD_MUTEX_ADAPTIVE_NP isc_result_t result = ISC_R_SUCCESS; result = isc_once_do(&once_attr, initialize_attr); RUNTIME_CHECK(result == ISC_R_SUCCESS); return (pthread_mutex_init(mp, &attr)); #else /* HAVE_PTHREAD_MUTEX_ADAPTIVE_NP */ return (pthread_mutex_init(mp, NULL)); #endif /* HAVE_PTHREAD_MUTEX_ADAPTIVE_NP */ }