/*
This file is part of GNUnet.
- (C) 2001, 2002, 2006, 2009 Christian Grothoff (and other contributing authors)
+ (C) 2001-2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
* @brief functions for handling time and time arithmetic
*/
#include "platform.h"
-#include "gnunet_time_lib.h"
+#include "gnunet_util_lib.h"
#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
+/**
+ * Variable used to simulate clock skew. Used for testing, never in production.
+ */
static long long timestamp_offset;
/**
timestamp_offset = offset;
}
+
+/**
+ * Get the timestamp offset for this instance.
+ *
+ * @return the offset we currently skew the locale time by
+ */
+long long
+GNUNET_TIME_get_offset ()
+{
+ return timestamp_offset;
+}
+
+
/**
* Get the current time (works just as "time", just that we use the
* unit of time that the cron-jobs use (and is 64 bit)).
struct timeval tv;
GETTIMEOFDAY (&tv, NULL);
- ret.abs_value =
- (uint64_t) (((uint64_t) tv.tv_sec * 1000LL) +
- ((uint64_t) tv.tv_usec / 1000LL)) + timestamp_offset;
+ ret.abs_value_us =
+ (uint64_t) (((uint64_t) tv.tv_sec * 1000LL * 1000LL) +
+ ((uint64_t) tv.tv_usec)) + timestamp_offset;
return ret;
}
* Return relative time of 0ms.
*/
struct GNUNET_TIME_Relative
-GNUNET_TIME_relative_get_zero ()
+GNUNET_TIME_relative_get_zero_ ()
{
static struct GNUNET_TIME_Relative zero;
* Return absolute time of 0ms.
*/
struct GNUNET_TIME_Absolute
-GNUNET_TIME_absolute_get_zero ()
+GNUNET_TIME_absolute_get_zero_ ()
{
static struct GNUNET_TIME_Absolute zero;
return zero;
}
+
+/**
+ * Return relative time of 1us.
+ */
+struct GNUNET_TIME_Relative
+GNUNET_TIME_relative_get_unit_ ()
+{
+ static struct GNUNET_TIME_Relative one = { 1 };
+ return one;
+}
+
+
/**
* Return relative time of 1ms.
*/
struct GNUNET_TIME_Relative
-GNUNET_TIME_relative_get_unit ()
+GNUNET_TIME_relative_get_millisecond_ ()
{
- static struct GNUNET_TIME_Relative one = { 1 };
+ static struct GNUNET_TIME_Relative one = { 1000 };
+ return one;
+}
+
+
+/**
+ * Return relative time of 1s.
+ */
+struct GNUNET_TIME_Relative
+GNUNET_TIME_relative_get_second_ ()
+{
+ static struct GNUNET_TIME_Relative one = { 1000 * 1000LL };
+ return one;
+}
+
+
+/**
+ * Return relative time of 1 minute.
+ */
+struct GNUNET_TIME_Relative
+GNUNET_TIME_relative_get_minute_ ()
+{
+ static struct GNUNET_TIME_Relative one = { 60 * 1000 * 1000LL };
+ return one;
+}
+
+
+/**
+ * Return relative time of 1 hour.
+ */
+struct GNUNET_TIME_Relative
+GNUNET_TIME_relative_get_hour_ ()
+{
+ static struct GNUNET_TIME_Relative one = { 60 * 60 * 1000 * 1000LL };
return one;
}
+
/**
* Return "forever".
*/
struct GNUNET_TIME_Relative
-GNUNET_TIME_relative_get_forever ()
+GNUNET_TIME_relative_get_forever_ ()
{
static struct GNUNET_TIME_Relative forever = { UINT64_MAX };
return forever;
* Return "forever".
*/
struct GNUNET_TIME_Absolute
-GNUNET_TIME_absolute_get_forever ()
+GNUNET_TIME_absolute_get_forever_ ()
{
static struct GNUNET_TIME_Absolute forever = { UINT64_MAX };
return forever;
{
struct GNUNET_TIME_Absolute ret;
- if (rel.rel_value == UINT64_MAX)
- return GNUNET_TIME_absolute_get_forever ();
+ if (rel.rel_value_us == UINT64_MAX)
+ return GNUNET_TIME_UNIT_FOREVER_ABS;
struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
- if (rel.rel_value + now.abs_value < rel.rel_value)
+ if (rel.rel_value_us + now.abs_value_us < rel.rel_value_us)
{
GNUNET_break (0); /* overflow... */
- return GNUNET_TIME_absolute_get_forever ();
+ return GNUNET_TIME_UNIT_FOREVER_ABS;
}
- ret.abs_value = rel.rel_value + now.abs_value;
+ ret.abs_value_us = rel.rel_value_us + now.abs_value_us;
return ret;
}
GNUNET_TIME_relative_min (struct GNUNET_TIME_Relative t1,
struct GNUNET_TIME_Relative t2)
{
- return (t1.rel_value < t2.rel_value) ? t1 : t2;
+ return (t1.rel_value_us < t2.rel_value_us) ? t1 : t2;
}
GNUNET_TIME_relative_max (struct GNUNET_TIME_Relative t1,
struct GNUNET_TIME_Relative t2)
{
- return (t1.rel_value > t2.rel_value) ? t1 : t2;
+ return (t1.rel_value_us > t2.rel_value_us) ? t1 : t2;
}
GNUNET_TIME_absolute_min (struct GNUNET_TIME_Absolute t1,
struct GNUNET_TIME_Absolute t2)
{
- return (t1.abs_value < t2.abs_value) ? t1 : t2;
+ return (t1.abs_value_us < t2.abs_value_us) ? t1 : t2;
}
*
* @param t1 first timestamp
* @param t2 other timestamp
- * @return timestamp that is smaller
+ * @return timestamp that is bigger
*/
struct GNUNET_TIME_Absolute
GNUNET_TIME_absolute_max (struct GNUNET_TIME_Absolute t1,
struct GNUNET_TIME_Absolute t2)
{
- return (t1.abs_value > t2.abs_value) ? t1 : t2;
+ return (t1.abs_value_us > t2.abs_value_us) ? t1 : t2;
}
{
struct GNUNET_TIME_Relative ret;
- if (future.abs_value == UINT64_MAX)
- return GNUNET_TIME_relative_get_forever ();
+ if (future.abs_value_us == UINT64_MAX)
+ return GNUNET_TIME_UNIT_FOREVER_REL;
struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
- if (now.abs_value > future.abs_value)
- return GNUNET_TIME_relative_get_zero ();
- ret.rel_value = future.abs_value - now.abs_value;
+ if (now.abs_value_us > future.abs_value_us)
+ return GNUNET_TIME_UNIT_ZERO;
+ ret.rel_value_us = future.abs_value_us - now.abs_value_us;
return ret;
}
{
struct GNUNET_TIME_Relative ret;
- if (end.abs_value == UINT64_MAX)
- return GNUNET_TIME_relative_get_forever ();
- if (end.abs_value < start.abs_value)
- return GNUNET_TIME_relative_get_zero ();
- ret.rel_value = end.abs_value - start.abs_value;
+ if (end.abs_value_us == UINT64_MAX)
+ return GNUNET_TIME_UNIT_FOREVER_REL;
+ if (end.abs_value_us < start.abs_value_us)
+ return GNUNET_TIME_UNIT_ZERO;
+ ret.rel_value_us = end.abs_value_us - start.abs_value_us;
return ret;
}
struct GNUNET_TIME_Relative ret;
now = GNUNET_TIME_absolute_get ();
- GNUNET_assert (whence.abs_value != UINT64_MAX);
- if (whence.abs_value > now.abs_value)
- return GNUNET_TIME_relative_get_zero ();
- ret.rel_value = now.abs_value - whence.abs_value;
+ GNUNET_assert (whence.abs_value_us != UINT64_MAX);
+ if (whence.abs_value_us > now.abs_value_us)
+ return GNUNET_TIME_UNIT_ZERO;
+ ret.rel_value_us = now.abs_value_us - whence.abs_value_us;
return ret;
}
{
struct GNUNET_TIME_Absolute ret;
- if ((start.abs_value == UINT64_MAX) || (duration.rel_value == UINT64_MAX))
- return GNUNET_TIME_absolute_get_forever ();
- if (start.abs_value + duration.rel_value < start.abs_value)
+ if ((start.abs_value_us == UINT64_MAX) || (duration.rel_value_us == UINT64_MAX))
+ return GNUNET_TIME_UNIT_FOREVER_ABS;
+ if (start.abs_value_us + duration.rel_value_us < start.abs_value_us)
{
GNUNET_break (0);
- return GNUNET_TIME_absolute_get_forever ();
+ return GNUNET_TIME_UNIT_FOREVER_ABS;
}
- ret.abs_value = start.abs_value + duration.rel_value;
+ ret.abs_value_us = start.abs_value_us + duration.rel_value_us;
return ret;
}
{
struct GNUNET_TIME_Absolute ret;
- if (start.abs_value <= duration.rel_value)
+ if (start.abs_value_us <= duration.rel_value_us)
return GNUNET_TIME_UNIT_ZERO_ABS;
- if (start.abs_value == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value)
+ if (start.abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
return GNUNET_TIME_UNIT_FOREVER_ABS;
- ret.abs_value = start.abs_value - duration.rel_value;
+ ret.abs_value_us = start.abs_value_us - duration.rel_value_us;
return ret;
}
{
struct GNUNET_TIME_Relative ret;
- if (factor == 0)
- return GNUNET_TIME_relative_get_zero ();
- ret.rel_value = rel.rel_value * (unsigned long long) factor;
- if (ret.rel_value / factor != rel.rel_value)
+ if (0 == factor)
+ return GNUNET_TIME_UNIT_ZERO;
+ if (rel.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us)
+ return GNUNET_TIME_UNIT_FOREVER_REL;
+ ret.rel_value_us = rel.rel_value_us * (unsigned long long) factor;
+ if (ret.rel_value_us / factor != rel.rel_value_us)
{
GNUNET_break (0);
- return GNUNET_TIME_relative_get_forever ();
+ return GNUNET_TIME_UNIT_FOREVER_REL;
}
return ret;
}
{
struct GNUNET_TIME_Relative ret;
- if ((factor == 0) ||
- (rel.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value))
+ if ((0 == factor) ||
+ (rel.rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us))
return GNUNET_TIME_UNIT_FOREVER_REL;
- ret.rel_value = rel.rel_value / (unsigned long long) factor;
+ ret.rel_value_us = rel.rel_value_us / (unsigned long long) factor;
return ret;
}
GNUNET_break (finished <= total);
if (finished >= total)
return GNUNET_TIME_UNIT_ZERO;
- if (finished == 0)
+ if (0 == finished)
return GNUNET_TIME_UNIT_FOREVER_REL;
dur = GNUNET_TIME_absolute_get_duration (start);
- exp = ((double) dur.rel_value) * ((double) total) / ((double) finished);
- ret.rel_value = ((uint64_t) exp) - dur.rel_value;
+ exp = ((double) dur.rel_value_us) * ((double) total) / ((double) finished);
+ ret.rel_value_us = ((uint64_t) exp) - dur.rel_value_us;
return ret;
}
{
struct GNUNET_TIME_Relative ret;
- if ((a1.rel_value == UINT64_MAX) || (a2.rel_value == UINT64_MAX))
- return GNUNET_TIME_relative_get_forever ();
- if (a1.rel_value + a2.rel_value < a1.rel_value)
+ if ((a1.rel_value_us == UINT64_MAX) || (a2.rel_value_us == UINT64_MAX))
+ return GNUNET_TIME_UNIT_FOREVER_REL;
+ if (a1.rel_value_us + a2.rel_value_us < a1.rel_value_us)
{
GNUNET_break (0);
- return GNUNET_TIME_relative_get_forever ();
+ return GNUNET_TIME_UNIT_FOREVER_REL;
}
- ret.rel_value = a1.rel_value + a2.rel_value;
+ ret.rel_value_us = a1.rel_value_us + a2.rel_value_us;
return ret;
}
{
struct GNUNET_TIME_Relative ret;
- if (a2.rel_value >= a1.rel_value)
- return GNUNET_TIME_relative_get_zero ();
- if (a1.rel_value == UINT64_MAX)
- return GNUNET_TIME_relative_get_forever ();
- ret.rel_value = a1.rel_value - a2.rel_value;
+ if (a2.rel_value_us >= a1.rel_value_us)
+ return GNUNET_TIME_UNIT_ZERO;
+ if (a1.rel_value_us == UINT64_MAX)
+ return GNUNET_TIME_UNIT_FOREVER_REL;
+ ret.rel_value_us = a1.rel_value_us - a2.rel_value_us;
return ret;
}
{
struct GNUNET_TIME_RelativeNBO ret;
- ret.rel_value__ = GNUNET_htonll (a.rel_value);
+ ret.rel_value_us__ = GNUNET_htonll (a.rel_value_us);
return ret;
}
+
/**
* Convert relative time from network byte order.
*
{
struct GNUNET_TIME_Relative ret;
- ret.rel_value = GNUNET_ntohll (a.rel_value__);
+ ret.rel_value_us = GNUNET_ntohll (a.rel_value_us__);
return ret;
}
+
/**
* Convert absolute time to network byte order.
*
{
struct GNUNET_TIME_AbsoluteNBO ret;
- ret.abs_value__ = GNUNET_htonll (a.abs_value);
+ ret.abs_value_us__ = GNUNET_htonll (a.abs_value_us);
return ret;
}
+
/**
* Convert absolute time from network byte order.
*
{
struct GNUNET_TIME_Absolute ret;
- ret.abs_value = GNUNET_ntohll (a.abs_value__);
+ ret.abs_value_us = GNUNET_ntohll (a.abs_value_us__);
return ret;
}
+
/**
- * Convert a relative time to a string.
- * This is one of the very few calls in the entire API that is
- * NOT reentrant!
- *
- * @param time the time to print
+ * Return the current year (i.e. '2011').
+ */
+unsigned int
+GNUNET_TIME_get_current_year ()
+{
+ time_t tp;
+ struct tm *t;
+
+ tp = time (NULL);
+ t = gmtime (&tp);
+ if (t == NULL)
+ return 0;
+ return t->tm_year + 1900;
+}
+
+
+/**
+ * Convert an expiration time to the respective year (rounds)
*
- * @return string form of the time (as milliseconds)
+ * @param at absolute time
+ * @return year a year (after 1970), 0 on error
*/
-const char *
-GNUNET_TIME_relative_to_string (struct GNUNET_TIME_Relative time)
+unsigned int
+GNUNET_TIME_time_to_year (struct GNUNET_TIME_Absolute at)
{
- static char time_string[21];
+ struct tm *t;
+ time_t tp;
+
+ tp = at.abs_value_us / 1000LL / 1000LL; /* microseconds to seconds */
+ t = gmtime (&tp);
+ if (t == NULL)
+ return 0;
+ return t->tm_year + 1900;
+
+}
- memset (time_string, 0, sizeof (time_string));
- sprintf (time_string, "%llu", (unsigned long long) time.rel_value);
- return (const char *) time_string;
+/**
+ * Convert a year to an expiration time of January 1st of that year.
+ *
+ * @param year a year (after 1970, please ;-)).
+ * @return absolute time for January 1st of that year.
+ */
+struct GNUNET_TIME_Absolute
+GNUNET_TIME_year_to_time (unsigned int year)
+{
+ struct GNUNET_TIME_Absolute ret;
+ time_t tp;
+ struct tm t;
+
+ memset (&t, 0, sizeof (t));
+ if (year < 1900)
+ {
+ GNUNET_break (0);
+ return GNUNET_TIME_absolute_get (); /* now */
+ }
+ t.tm_year = year - 1900;
+ t.tm_mday = 1;
+ t.tm_mon = 1;
+ t.tm_wday = 1;
+ t.tm_yday = 1;
+ tp = mktime (&t);
+ GNUNET_break (tp != (time_t) - 1);
+ ret.abs_value_us = tp * 1000LL * 1000LL; /* seconds to microseconds */
+ return ret;
}
projects / oweals / gnunet.git / blobdiff