1 files changed, 50 insertions, 0 deletions
diff --git a/lib/isc/include/isc/mutex.h b/lib/isc/include/isc/mutex.h
new file mode 100644
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--- /dev/null
+++ b/lib/isc/include/isc/mutex.h
@@ -0,0 +1,50 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+/*! \file */
+
+#include <pthread.h>
+#include <stdio.h>
+
+#include <isc/lang.h>
+#include <isc/result.h> /* for ISC_R_ codes */
+
+ISC_LANG_BEGINDECLS
+
+typedef pthread_mutex_t isc_mutex_t;
+
+int
+isc__mutex_init(isc_mutex_t *mp);
+
+#define isc_mutex_init(mp)                                            \
+	do {                                                          \
+		int _err = isc__mutex_init((mp));                     \
+		if (_err != 0) {                                      \
+			FATAL_SYSERROR(_err, "pthread_mutex_init()"); \
+		}                                                     \
+	} while (0)
+
+#define isc_mutex_lock(mp) \
+	((pthread_mutex_lock((mp)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED)
+
+#define isc_mutex_unlock(mp) \
+	((pthread_mutex_unlock((mp)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED)
+
+#define isc_mutex_trylock(mp) \
+	((pthread_mutex_trylock((mp)) == 0) ? ISC_R_SUCCESS : ISC_R_LOCKBUSY)
+
+#define isc_mutex_destroy(mp) RUNTIME_CHECK(pthread_mutex_destroy((mp)) == 0)
+
+ISC_LANG_ENDDECLS