1 files changed, 33 insertions, 0 deletions
diff --git a/openbsd-compat/clock_gettime.c b/openbsd-compat/clock_gettime.c
new file mode 100644
index 0000000..bbf978c
--- /dev/null
+++ b/openbsd-compat/clock_gettime.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2020 Yubico AB. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "openbsd-compat.h"
+
+#if !defined(HAVE_CLOCK_GETTIME)
+
+#if _WIN32
+int
+clock_gettime(clockid_t clock_id, struct timespec *tp)
+{
+	ULONGLONG ms;
+
+	if (clock_id != CLOCK_MONOTONIC) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	ms = GetTickCount64();
+	tp->tv_sec = ms / 1000L;
+	tp->tv_nsec = (ms % 1000L) * 1000000L;
+
+	return (0);
+}
+#else
+#error "please provide an implementation of clock_gettime() for your platform"
+#endif /* _WIN32 */
+
+#endif /* !defined(HAVE_CLOCK_GETTIME) */