/*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
*
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
*
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
*/
#ifndef TIMEVAL_H
#include "type-props.h"
#include "util.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct ds;
struct pollfd;
+struct timespec;
struct timeval;
/* POSIX allows floating-point time_t, but we don't support it. */
#define TIME_MAX TYPE_MAXIMUM(time_t)
#define TIME_MIN TYPE_MINIMUM(time_t)
-/* Interval between updates to the time reported by time_gettimeofday(), in ms.
- * This should not be adjusted much below 10 ms or so with the current
- * implementation, or too much time will be wasted in signal handlers and calls
- * to time(0). */
-#define TIME_UPDATE_INTERVAL 100
+/* Interval between updates to the reported time, in ms. This should not be
+ * adjusted much below 10 ms or so with the current implementation, or too
+ * much time will be wasted in signal handlers and calls to clock_gettime(). */
+#define TIME_UPDATE_INTERVAL 25
-void time_init(void);
+/* True on systems that support a monotonic clock. Compared to just getting
+ * the value of a variable, clock_gettime() is somewhat expensive, even on
+ * systems that try hard to optimize it (such as x86-64 Linux), so it's
+ * worthwhile to minimize calls via caching. */
+#ifndef CACHE_TIME
+#if defined ESX
+#define CACHE_TIME 0
+#else
+#define CACHE_TIME 1
+#endif
+#endif /* ifndef CACHE_TIME */
+
+void time_disable_restart(void);
+void time_enable_restart(void);
+void time_postfork(void);
void time_refresh(void);
time_t time_now(void);
+time_t time_wall(void);
long long int time_msec(void);
-void time_timeval(struct timeval *);
+long long int time_wall_msec(void);
+void time_timespec(struct timespec *);
+void time_wall_timespec(struct timespec *);
void time_alarm(unsigned int secs);
-int time_poll(struct pollfd *, int n_pollfds, int timeout);
+int time_poll(struct pollfd *, int n_pollfds, long long int timeout_when,
+ int *elapsed);
+bool time_cached(void);
+
+long long int timespec_to_msec(const struct timespec *);
+long long int timeval_to_msec(const struct timeval *);
+
+void xgettimeofday(struct timeval *);
+
+int get_cpu_usage(void);
+void format_backtraces(struct ds *, size_t min_count);
+
+long long int time_boot_msec(void);
+
+#ifdef __cplusplus
+}
+#endif
#endif /* timeval.h */