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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:59:48 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:59:48 +0000
commit3b9b6d0b8e7f798023c9d109c490449d528fde80 (patch)
tree2e1c188dd7b8d7475cd163de9ae02c428343669b /lib/isc/mutex.c
parentInitial commit. (diff)
downloadbind9-3b9b6d0b8e7f798023c9d109c490449d528fde80.tar.xz
bind9-3b9b6d0b8e7f798023c9d109c490449d528fde80.zip
Adding upstream version 1:9.18.19.upstream/1%9.18.19upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/isc/mutex.c')
-rw-r--r--lib/isc/mutex.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/lib/isc/mutex.c b/lib/isc/mutex.c
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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 */
+}