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-rw-r--r--lib/isc/unix/stdtime.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/isc/unix/stdtime.c b/lib/isc/unix/stdtime.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 <stddef.h> /* NULL */
+#include <stdlib.h> /* NULL */
+#include <syslog.h>
+#include <time.h>
+
+#include <isc/stdtime.h>
+#include <isc/strerr.h>
+#include <isc/util.h>
+
+#define NS_PER_S 1000000000 /*%< Nanoseconds per second. */
+
+#if defined(CLOCK_REALTIME_COARSE)
+#define CLOCKSOURCE CLOCK_REALTIME_COARSE
+#elif defined(CLOCK_REALTIME_FAST)
+#define CLOCKSOURCE CLOCK_REALTIME_FAST
+#else /* if defined(CLOCK_REALTIME_COARSE) */
+#define CLOCKSOURCE CLOCK_REALTIME
+#endif /* if defined(CLOCK_REALTIME_COARSE) */
+
+void
+isc_stdtime_get(isc_stdtime_t *t) {
+ REQUIRE(t != NULL);
+
+ struct timespec ts;
+
+ if (clock_gettime(CLOCKSOURCE, &ts) == -1) {
+ char strbuf[ISC_STRERRORSIZE];
+ strerror_r(errno, strbuf, sizeof(strbuf));
+ isc_error_fatal(__FILE__, __LINE__, "clock_gettime failed: %s",
+ strbuf);
+ }
+
+ REQUIRE(ts.tv_sec > 0 && ts.tv_nsec >= 0 && ts.tv_nsec < NS_PER_S);
+
+ *t = (isc_stdtime_t)ts.tv_sec;
+}
+
+void
+isc_stdtime_tostring(isc_stdtime_t t, char *out, size_t outlen) {
+ time_t when;
+
+ REQUIRE(out != NULL);
+ REQUIRE(outlen >= 26);
+
+ UNUSED(outlen);
+
+ /* time_t and isc_stdtime_t might be different sizes */
+ when = t;
+ INSIST((ctime_r(&when, out) != NULL));
+ *(out + strlen(out) - 1) = '\0';
+}