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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.
*/
/*! \file */
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/time.h>
#include <time.h>
#include <isc/mutex.h>
#include <isc/once.h>
#include <isc/print.h>
#include <isc/string.h>
#include <isc/util.h>
#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 */
}
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