Import BSDDB 4.7.25 (as of svn r89086)

os/os_clock.c

@@ -0,0 +1,73 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 2001,2008 Oracle.  All rights reserved.
+ *
+ * $Id: os_clock.c 63573 2008-05-23 21:43:21Z trent.nelson $
+ */
+
+#include "db_config.h"
+
+#include "db_int.h"
+
+/*
+ * __os_gettime --
+ *	Return the current time-of-day clock in seconds and nanoseconds.
+ *
+ * PUBLIC: void __os_gettime __P((ENV *, db_timespec *, int));
+ */
+void
+__os_gettime(env, tp, monotonic)
+	ENV *env;
+	db_timespec *tp;
+	int monotonic;
+{
+	const char *sc;
+	int ret;
+
+#if defined(HAVE_CLOCK_GETTIME)
+#if defined(HAVE_CLOCK_MONOTONIC)
+	if (monotonic)
+		RETRY_CHK((clock_gettime(
+		    CLOCK_MONOTONIC, (struct timespec *)tp)), ret);
+	else
+#endif
+		RETRY_CHK((clock_gettime(
+		    CLOCK_REALTIME, (struct timespec *)tp)), ret);
+
+	RETRY_CHK((clock_gettime(CLOCK_REALTIME, (struct timespec *)tp)), ret);
+	if (ret != 0) {
+		sc = "clock_gettime";
+		goto err;
+	}
+#elif defined(HAVE_GETTIMEOFDAY)
+	struct timeval v;
+
+	RETRY_CHK((gettimeofday(&v, NULL)), ret);
+	if (ret != 0) {
+		sc = "gettimeofday";
+		goto err;
+	}
+
+	tp->tv_sec = v.tv_sec;
+	tp->tv_nsec = v.tv_usec * NS_PER_US;
+#elif defined(HAVE_TIME)
+	time_t now;
+
+	RETRY_CHK((time(&now) == (time_t)-1 ? 1 : 0), ret);
+	if (ret != 0) {
+		sc = "time";
+		goto err;
+	}
+
+	tp->tv_sec = now;
+	tp->tv_nsec = 0;
+#else
+	NO AVAILABLE CLOCK IMPLEMENTATION
+#endif
+	COMPQUIET(monotonic, 0);
+	return;
+
+err:	__db_syserr(env, ret, "%s", sc);
+	(void)__env_panic(env, __os_posix_err(ret));
+}