X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=glib%2Fgtimer.c;h=a45c3cff07bb597635d1eb15a2ecce7aacac2288;hb=dbf447292d83b54be321c33025aea2e4d448d4f5;hp=6e58fa0bdb0122cccfe7605db7c54756ad3b95fe;hpb=7e046917266805e0ddeb60f07b98ea82d9e8c1ac;p=platform%2Fupstream%2Fglib.git diff --git a/glib/gtimer.c b/glib/gtimer.c index 6e58fa0..a45c3cf 100644 --- a/glib/gtimer.c +++ b/glib/gtimer.c @@ -2,181 +2,556 @@ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public + * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. + * Lesser General Public License for more details. * - * You should have received a copy of the GNU Library General Public + * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ -#ifdef HAVE_CONFIG_H -#include -#endif +/* + * Modified by the GLib Team and others 1997-2000. See the AUTHORS + * file for a list of people on the GLib Team. See the ChangeLog + * files for a list of changes. These files are distributed with + * GLib at ftp://ftp.gtk.org/pub/gtk/. + */ + +/* + * MT safe + */ + +#include "config.h" +#include "glibconfig.h" + +#include -#include "glib.h" #ifdef HAVE_UNISTD_H #include #endif /* HAVE_UNISTD_H */ -#ifndef NATIVE_WIN32 + +#ifdef HAVE_SYS_TIME_H #include -#endif /* NATIVE_WIN32 */ +#endif +#include +#ifndef G_OS_WIN32 +#include +#endif /* G_OS_WIN32 */ -#ifdef NATIVE_WIN32 +#ifdef G_OS_WIN32 #include -#endif /* NATIVE_WIN32 */ +#endif /* G_OS_WIN32 */ -typedef struct _GRealTimer GRealTimer; +#include "gtimer.h" -struct _GRealTimer +#include "gmem.h" +#include "gstrfuncs.h" +#include "gtestutils.h" +#include "gmain.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. + **/ + +/** + * GTimer: + * + * Opaque datatype that records a start time. + **/ +struct _GTimer { -#ifdef NATIVE_WIN32 - DWORD start; - DWORD end; -#else /* !NATIVE_WIN32 */ - struct timeval start; - struct timeval end; -#endif /* !NATIVE_WIN32 */ + guint64 start; + guint64 end; guint active : 1; }; +/** + * g_timer_new: + * + * Creates a new timer, and starts timing (i.e. g_timer_start() is + * implicitly called for you). + * + * Returns: a new #GTimer. + **/ GTimer* g_timer_new (void) { - GRealTimer *timer; + GTimer *timer; - timer = g_new (GRealTimer, 1); + timer = g_new (GTimer, 1); timer->active = TRUE; -#ifdef NATIVE_WIN32 - timer->start = GetTickCount (); -#else /* !NATIVE_WIN32 */ - gettimeofday (&timer->start, NULL); -#endif /* !NATIVE_WIN32 */ + timer->start = g_get_monotonic_time (); - return ((GTimer*) timer); + return timer; } +/** + * g_timer_destroy: + * @timer: a #GTimer to destroy. + * + * Destroys a timer, freeing associated resources. + **/ void g_timer_destroy (GTimer *timer) { - g_assert (timer != NULL); + g_return_if_fail (timer != NULL); 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) { - GRealTimer *rtimer; + g_return_if_fail (timer != NULL); - g_assert (timer != NULL); - - rtimer = (GRealTimer*) timer; - rtimer->active = TRUE; + timer->active = TRUE; -#ifdef NATIVE_WIN32 - rtimer->start = GetTickCount (); -#else /* !NATIVE_WIN32 */ - gettimeofday (&rtimer->start, NULL); -#endif /* !NATIVE_WIN32 */ + timer->start = g_get_monotonic_time (); } +/** + * 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) { - GRealTimer *rtimer; - - g_assert (timer != NULL); + g_return_if_fail (timer != NULL); - rtimer = (GRealTimer*) timer; - rtimer->active = FALSE; + timer->active = FALSE; -#ifdef NATIVE_WIN32 - rtimer->end = GetTickCount (); -#else /* !NATIVE_WIN32 */ - gettimeofday (&rtimer->end, NULL); -#endif /* !NATIVE_WIN32 */ + timer->end = g_get_monotonic_time (); } +/** + * 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) { - GRealTimer *rtimer; + g_return_if_fail (timer != NULL); + + timer->start = g_get_monotonic_time (); +} + +/** + * 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. + */ - g_assert (timer != NULL); + elapsed = timer->end - timer->start; - rtimer = (GRealTimer*) timer; + timer->start = g_get_monotonic_time (); -#ifdef NATIVE_WIN32 - rtimer->start = GetTickCount (); -#else /* !NATIVE_WIN32 */ - gettimeofday (&rtimer->start, NULL); -#endif /* !NATIVE_WIN32 */ + 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 + * + * 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. + * + * Returns: seconds elapsed as a floating point value, including any + * fractional part. + **/ gdouble g_timer_elapsed (GTimer *timer, gulong *microseconds) { - GRealTimer *rtimer; gdouble total; -#ifndef NATIVE_WIN32 - struct timeval elapsed; -#endif /* NATIVE_WIN32 */ + gint64 elapsed; g_return_val_if_fail (timer != NULL, 0); - rtimer = (GRealTimer*) timer; + if (timer->active) + timer->end = g_get_monotonic_time (); -#ifdef NATIVE_WIN32 - if (rtimer->active) - rtimer->end = GetTickCount (); + elapsed = timer->end - timer->start; - /* Check for wraparound, which happens every 49.7 days. - * No, Win95 machines probably are never running for that long, - * but NT machines are. - */ - if (rtimer->end < rtimer->start) - total = (UINT_MAX - (rtimer->start - rtimer->end)) / 1000.0; - else - total = (rtimer->end - rtimer->start) / 1000.0; + total = elapsed / 1e6; if (microseconds) + *microseconds = elapsed % 1000000; + + return total; +} + +/** + * g_usleep: + * @microseconds: number of microseconds to pause + * + * Pauses the current thread for the given number of microseconds. + * + * There are 1 million microseconds per second (represented by the + * #G_USEC_PER_SEC macro). g_usleep() may have limited precision, + * depending on hardware and operating system; don't rely on the exact + * length of the sleep. + */ +void +g_usleep (gulong microseconds) +{ +#ifdef G_OS_WIN32 + Sleep (microseconds / 1000); +#else + 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) == -1 && errno == EINTR) + request = remaining; +#endif +} + +/** + * g_time_val_add: + * @time_: a #GTimeVal + * @microseconds: number of microseconds to add to @time + * + * Adds the given number of microseconds to @time_. @microseconds can + * also be negative to decrease the value of @time_. + **/ +void +g_time_val_add (GTimeVal *time_, glong microseconds) +{ + g_return_if_fail (time_->tv_usec >= 0 && time_->tv_usec < G_USEC_PER_SEC); + + if (microseconds >= 0) { - if (rtimer->end < rtimer->start) - *microseconds = - ((UINT_MAX - (rtimer->start - rtimer->end)) % 1000) * 1000; - else - *microseconds = - ((rtimer->end - rtimer->start) % 1000) * 1000; + time_->tv_usec += microseconds % G_USEC_PER_SEC; + time_->tv_sec += microseconds / G_USEC_PER_SEC; + if (time_->tv_usec >= G_USEC_PER_SEC) + { + time_->tv_usec -= G_USEC_PER_SEC; + time_->tv_sec++; + } + } + else + { + microseconds *= -1; + time_->tv_usec -= microseconds % G_USEC_PER_SEC; + time_->tv_sec -= microseconds / G_USEC_PER_SEC; + if (time_->tv_usec < 0) + { + time_->tv_usec += G_USEC_PER_SEC; + time_->tv_sec--; + } + } +} + +/* 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_: (out): a #GTimeVal + * + * Converts a string containing an ISO 8601 encoded date and time + * to a #GTimeVal and puts it into @time_. + * + * @iso_date must include year, month, day, hours, minutes, and + * seconds. It can optionally include fractions of a second and a time + * zone indicator. (In the absence of any time zone indication, the + * timestamp is assumed to be in local 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; } -#else /* !NATIVE_WIN32 */ - if (rtimer->active) - gettimeofday (&rtimer->end, NULL); - if (rtimer->start.tv_usec > rtimer->end.tv_usec) + if (*iso_date != 'T') { - rtimer->end.tv_usec += 1000000; - rtimer->end.tv_sec--; + /* Date only */ + if (*iso_date == '\0') + return TRUE; + return FALSE; } - elapsed.tv_usec = rtimer->end.tv_usec - rtimer->start.tv_usec; - elapsed.tv_sec = rtimer->end.tv_sec - rtimer->start.tv_sec; + iso_date++; - total = elapsed.tv_sec + ((gdouble) elapsed.tv_usec / 1e6); + /* If there is a 'T' then there has to be a time */ + if (!g_ascii_isdigit (*iso_date)) + return FALSE; - if (microseconds) - *microseconds = elapsed.tv_usec; -#endif /* !NATIVE_WIN32 */ + 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; + } - return total; + 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 RFC 3339 encoded string, relative to the + * Coordinated Universal Time (UTC). This is one of the many formats + * allowed by ISO 8601. + * + * ISO 8601 allows a large number of date/time formats, with or without + * punctuation and optional elements. The format returned by this function + * is a complete date and time, with optional punctuation included, the + * UTC time zone represented as "Z", and the @tv_usec part included if + * and only if it is nonzero, i.e. either + * "YYYY-MM-DDTHH:MM:SSZ" or "YYYY-MM-DDTHH:MM:SS.fffffZ". + * + * This corresponds to the Internet date/time format defined by + * RFC 3339, and + * to either of the two most-precise formats defined by + * the W3C Note + * "Date and Time Formats". Both of these documents are profiles of + * ISO 8601. + * + * Use g_date_time_format() or g_strdup_printf() if a different + * variation of ISO 8601 format is required. + * + * 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; }