* MT safe
*/
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
+#include "config.h"
+#include "glibconfig.h"
+
+#include <stdlib.h>
-#include "glib.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
+
#ifndef G_OS_WIN32
#include <sys/time.h>
#include <time.h>
#include <windows.h>
#endif /* G_OS_WIN32 */
+#include "glib.h"
+#include "gthread.h"
+
+/**
+ * SECTION: timers
+ * @title: Timers
+ * @short_description: keep track of elapsed time
+ *
+ * #GTimer records a start time, and counts microseconds elapsed since
+ * that time. This is done somewhat differently on different platforms,
+ * and can be tricky to get exactly right, so #GTimer provides a
+ * portable/convenient interface.
+ *
+ * <note><para>
+ * #GTimer uses a higher-quality clock when thread support is available.
+ * Therefore, calling g_thread_init() while timers are running may lead to
+ * unreliable results. It is best to call g_thread_init() before starting any
+ * timers, if you are using threads at all.
+ * </para></note>
+ **/
+
+#define G_NSEC_PER_SEC 1000000000
+
+#define GETTIME(v) (v = g_thread_gettime ())
+
+/**
+ * GTimer:
+ *
+ * Opaque datatype that records a start time.
+ **/
struct _GTimer
{
-#ifdef G_OS_WIN32
- DWORD start;
- DWORD end;
-#else /* !G_OS_WIN32 */
- struct timeval start;
- struct timeval end;
-#endif /* !G_OS_WIN32 */
+ guint64 start;
+ guint64 end;
guint active : 1;
};
-#ifdef G_OS_WIN32
-# define GETTIME(v) \
- v = GetTickCount ()
-#else /* !G_OS_WIN32 */
-# define GETTIME(v) \
- gettimeofday (&v, NULL)
-#endif /* !G_OS_WIN32 */
-
+/**
+ * g_timer_new:
+ * @Returns: a new #GTimer.
+ *
+ * Creates a new timer, and starts timing (i.e. g_timer_start() is
+ * implicitly called for you).
+ **/
GTimer*
g_timer_new (void)
{
return timer;
}
+/**
+ * g_timer_destroy:
+ * @timer: a #GTimer to destroy.
+ *
+ * Destroys a timer, freeing associated resources.
+ **/
void
g_timer_destroy (GTimer *timer)
{
g_free (timer);
}
+/**
+ * g_timer_start:
+ * @timer: a #GTimer.
+ *
+ * Marks a start time, so that future calls to g_timer_elapsed() will
+ * report the time since g_timer_start() was called. g_timer_new()
+ * automatically marks the start time, so no need to call
+ * g_timer_start() immediately after creating the timer.
+ **/
void
g_timer_start (GTimer *timer)
{
GETTIME (timer->start);
}
+/**
+ * g_timer_stop:
+ * @timer: a #GTimer.
+ *
+ * Marks an end time, so calls to g_timer_elapsed() will return the
+ * difference between this end time and the start time.
+ **/
void
g_timer_stop (GTimer *timer)
{
timer->active = FALSE;
- GETTIME(timer->end);
+ GETTIME (timer->end);
}
+/**
+ * g_timer_reset:
+ * @timer: a #GTimer.
+ *
+ * This function is useless; it's fine to call g_timer_start() on an
+ * already-started timer to reset the start time, so g_timer_reset()
+ * serves no purpose.
+ **/
void
g_timer_reset (GTimer *timer)
{
GETTIME (timer->start);
}
+/**
+ * g_timer_continue:
+ * @timer: a #GTimer.
+ *
+ * Resumes a timer that has previously been stopped with
+ * g_timer_stop(). g_timer_stop() must be called before using this
+ * function.
+ *
+ * Since: 2.4
+ **/
+void
+g_timer_continue (GTimer *timer)
+{
+ guint64 elapsed;
+
+ g_return_if_fail (timer != NULL);
+ g_return_if_fail (timer->active == FALSE);
+
+ /* Get elapsed time and reset timer start time
+ * to the current time minus the previously
+ * elapsed interval.
+ */
+
+ elapsed = timer->end - timer->start;
+
+ GETTIME (timer->start);
+
+ timer->start -= elapsed;
+
+ timer->active = TRUE;
+}
+
+/**
+ * g_timer_elapsed:
+ * @timer: a #GTimer.
+ * @microseconds: return location for the fractional part of seconds
+ * elapsed, in microseconds (that is, the total number
+ * of microseconds elapsed, modulo 1000000), or %NULL
+ * @Returns: seconds elapsed as a floating point value, including any
+ * fractional part.
+ *
+ * If @timer has been started but not stopped, obtains the time since
+ * the timer was started. If @timer has been stopped, obtains the
+ * elapsed time between the time it was started and the time it was
+ * stopped. The return value is the number of seconds elapsed,
+ * including any fractional part. The @microseconds out parameter is
+ * essentially useless.
+ *
+ * <warning><para>
+ * Calling initialization functions, in particular g_thread_init(), while a
+ * timer is running will cause invalid return values from this function.
+ * </para></warning>
+ **/
gdouble
g_timer_elapsed (GTimer *timer,
gulong *microseconds)
{
gdouble total;
-#ifndef G_OS_WIN32
- struct timeval elapsed;
-#endif /* G_OS_WIN32 */
+ gint64 elapsed;
g_return_val_if_fail (timer != NULL, 0);
-#ifdef G_OS_WIN32
if (timer->active)
- timer->end = GetTickCount ();
+ GETTIME (timer->end);
- /* Check for wraparound, which happens every 49.7 days. */
- if (timer->end < timer->start)
- total = (UINT_MAX - (timer->start - timer->end)) / 1000.0;
- else
- total = (timer->end - timer->start) / 1000.0;
+ elapsed = timer->end - timer->start;
- if (microseconds)
- {
- if (timer->end < timer->start)
- *microseconds =
- ((UINT_MAX - (timer->start - timer->end)) % 1000) * 1000;
- else
- *microseconds =
- ((timer->end - timer->start) % 1000) * 1000;
- }
-#else /* !G_OS_WIN32 */
- if (timer->active)
- gettimeofday (&timer->end, NULL);
+ total = elapsed / 1e9;
- if (timer->start.tv_usec > timer->end.tv_usec)
- {
- timer->end.tv_usec += G_USEC_PER_SEC;
- timer->end.tv_sec--;
- }
-
- elapsed.tv_usec = timer->end.tv_usec - timer->start.tv_usec;
- elapsed.tv_sec = timer->end.tv_sec - timer->start.tv_sec;
-
- total = elapsed.tv_sec + ((gdouble) elapsed.tv_usec / 1e6);
- if (total < 0)
- {
- total = 0;
-
- if (microseconds)
- *microseconds = 0;
- }
- else if (microseconds)
- *microseconds = elapsed.tv_usec;
-
-#endif /* !G_OS_WIN32 */
+ if (microseconds)
+ *microseconds = (elapsed / 1000) % 1000000;
return total;
}
struct timespec request, remaining;
request.tv_sec = microseconds / G_USEC_PER_SEC;
request.tv_nsec = 1000 * (microseconds % G_USEC_PER_SEC);
- while (nanosleep (&request, &remaining) == EINTR)
+ while (nanosleep (&request, &remaining) == -1 && errno == EINTR)
request = remaining;
# else /* !HAVE_NANOSLEEP */
+# ifdef HAVE_NSLEEP
+ /* on AIX, nsleep is analogous to nanosleep */
+ struct timespec request, remaining;
+ request.tv_sec = microseconds / G_USEC_PER_SEC;
+ request.tv_nsec = 1000 * (microseconds % G_USEC_PER_SEC);
+ while (nsleep (&request, &remaining) == -1 && errno == EINTR)
+ request = remaining;
+# else /* !HAVE_NSLEEP */
if (g_thread_supported ())
{
static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
tv.tv_usec = microseconds % G_USEC_PER_SEC;
select(0, NULL, NULL, NULL, &tv);
}
+# endif /* !HAVE_NSLEEP */
# endif /* !HAVE_NANOSLEEP */
#endif /* !G_OS_WIN32 */
}
}
}
}
+
+/* converts a broken down date representation, relative to UTC, to
+ * a timestamp; it uses timegm() if it's available.
+ */
+static time_t
+mktime_utc (struct tm *tm)
+{
+ time_t retval;
+
+#ifndef HAVE_TIMEGM
+ static const gint days_before[] =
+ {
+ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
+ };
+#endif
+
+#ifndef HAVE_TIMEGM
+ if (tm->tm_mon < 0 || tm->tm_mon > 11)
+ return (time_t) -1;
+
+ retval = (tm->tm_year - 70) * 365;
+ retval += (tm->tm_year - 68) / 4;
+ retval += days_before[tm->tm_mon] + tm->tm_mday - 1;
+
+ if (tm->tm_year % 4 == 0 && tm->tm_mon < 2)
+ retval -= 1;
+
+ retval = ((((retval * 24) + tm->tm_hour) * 60) + tm->tm_min) * 60 + tm->tm_sec;
+#else
+ retval = timegm (tm);
+#endif /* !HAVE_TIMEGM */
+
+ return retval;
+}
+
+/**
+ * g_time_val_from_iso8601:
+ * @iso_date: an ISO 8601 encoded date string
+ * @time_: a #GTimeVal
+ *
+ * Converts a string containing an ISO 8601 encoded date and time
+ * to a #GTimeVal and puts it into @time_.
+ *
+ * Return value: %TRUE if the conversion was successful.
+ *
+ * Since: 2.12
+ */
+gboolean
+g_time_val_from_iso8601 (const gchar *iso_date,
+ GTimeVal *time_)
+{
+ struct tm tm = {0};
+ long val;
+
+ g_return_val_if_fail (iso_date != NULL, FALSE);
+ g_return_val_if_fail (time_ != NULL, FALSE);
+
+ /* Ensure that the first character is a digit,
+ * the first digit of the date, otherwise we don't
+ * have an ISO 8601 date */
+ while (g_ascii_isspace (*iso_date))
+ iso_date++;
+
+ if (*iso_date == '\0')
+ return FALSE;
+
+ if (!g_ascii_isdigit (*iso_date) && *iso_date != '-' && *iso_date != '+')
+ return FALSE;
+
+ val = strtoul (iso_date, (char **)&iso_date, 10);
+ if (*iso_date == '-')
+ {
+ /* YYYY-MM-DD */
+ tm.tm_year = val - 1900;
+ iso_date++;
+ tm.tm_mon = strtoul (iso_date, (char **)&iso_date, 10) - 1;
+
+ if (*iso_date++ != '-')
+ return FALSE;
+
+ tm.tm_mday = strtoul (iso_date, (char **)&iso_date, 10);
+ }
+ else
+ {
+ /* YYYYMMDD */
+ tm.tm_mday = val % 100;
+ tm.tm_mon = (val % 10000) / 100 - 1;
+ tm.tm_year = val / 10000 - 1900;
+ }
+
+ if (*iso_date != 'T')
+ {
+ /* Date only */
+ if (*iso_date == '\0')
+ return TRUE;
+ return FALSE;
+ }
+
+ *iso_date++;
+
+ /* If there is a 'T' then there has to be a time */
+ if (!g_ascii_isdigit (*iso_date))
+ return FALSE;
+
+ val = strtoul (iso_date, (char **)&iso_date, 10);
+ if (*iso_date == ':')
+ {
+ /* hh:mm:ss */
+ tm.tm_hour = val;
+ iso_date++;
+ tm.tm_min = strtoul (iso_date, (char **)&iso_date, 10);
+
+ if (*iso_date++ != ':')
+ return FALSE;
+
+ tm.tm_sec = strtoul (iso_date, (char **)&iso_date, 10);
+ }
+ else
+ {
+ /* hhmmss */
+ tm.tm_sec = val % 100;
+ tm.tm_min = (val % 10000) / 100;
+ tm.tm_hour = val / 10000;
+ }
+
+ time_->tv_usec = 0;
+
+ if (*iso_date == ',' || *iso_date == '.')
+ {
+ glong mul = 100000;
+
+ while (g_ascii_isdigit (*++iso_date))
+ {
+ time_->tv_usec += (*iso_date - '0') * mul;
+ mul /= 10;
+ }
+ }
+
+ /* Now parse the offset and convert tm to a time_t */
+ if (*iso_date == 'Z')
+ {
+ iso_date++;
+ time_->tv_sec = mktime_utc (&tm);
+ }
+ else if (*iso_date == '+' || *iso_date == '-')
+ {
+ gint sign = (*iso_date == '+') ? -1 : 1;
+
+ val = strtoul (iso_date + 1, (char **)&iso_date, 10);
+
+ if (*iso_date == ':')
+ val = 60 * val + strtoul (iso_date + 1, (char **)&iso_date, 10);
+ else
+ val = 60 * (val / 100) + (val % 100);
+
+ time_->tv_sec = mktime_utc (&tm) + (time_t) (60 * val * sign);
+ }
+ else
+ {
+ /* No "Z" or offset, so local time */
+ tm.tm_isdst = -1; /* locale selects DST */
+ time_->tv_sec = mktime (&tm);
+ }
+
+ while (g_ascii_isspace (*iso_date))
+ iso_date++;
+
+ return *iso_date == '\0';
+}
+
+/**
+ * g_time_val_to_iso8601:
+ * @time_: a #GTimeVal
+ *
+ * Converts @time_ into an ISO 8601 encoded string, relative to the
+ * Coordinated Universal Time (UTC).
+ *
+ * Return value: a newly allocated string containing an ISO 8601 date
+ *
+ * Since: 2.12
+ */
+gchar *
+g_time_val_to_iso8601 (GTimeVal *time_)
+{
+ gchar *retval;
+ struct tm *tm;
+#ifdef HAVE_GMTIME_R
+ struct tm tm_;
+#endif
+ time_t secs;
+
+ g_return_val_if_fail (time_->tv_usec >= 0 && time_->tv_usec < G_USEC_PER_SEC, NULL);
+
+ secs = time_->tv_sec;
+#ifdef _WIN32
+ tm = gmtime (&secs);
+#else
+#ifdef HAVE_GMTIME_R
+ tm = gmtime_r (&secs, &tm_);
+#else
+ tm = gmtime (&secs);
+#endif
+#endif
+
+ if (time_->tv_usec != 0)
+ {
+ /* ISO 8601 date and time format, with fractionary seconds:
+ * YYYY-MM-DDTHH:MM:SS.MMMMMMZ
+ */
+ retval = g_strdup_printf ("%4d-%02d-%02dT%02d:%02d:%02d.%06ldZ",
+ tm->tm_year + 1900,
+ tm->tm_mon + 1,
+ tm->tm_mday,
+ tm->tm_hour,
+ tm->tm_min,
+ tm->tm_sec,
+ time_->tv_usec);
+ }
+ else
+ {
+ /* ISO 8601 date and time format:
+ * YYYY-MM-DDTHH:MM:SSZ
+ */
+ retval = g_strdup_printf ("%4d-%02d-%02dT%02d:%02d:%02dZ",
+ tm->tm_year + 1900,
+ tm->tm_mon + 1,
+ tm->tm_mday,
+ tm->tm_hour,
+ tm->tm_min,
+ tm->tm_sec);
+ }
+
+ return retval;
+}
projects / platform / upstream / glib.git / blobdiff