1 /* GLIB - Library of useful routines for C programming

     2  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald

     3  * Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

     4  *

     5  * This library is free software; you can redistribute it and/or

     6  * modify it under the terms of the GNU Lesser General Public

     7  * License as published by the Free Software Foundation; either

     8  * version 2 of the License, or (at your option) any later version.

     9  *

    10  * This library is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13  * Lesser General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU Lesser General Public

    16  * License along with this library; if not, write to the

    17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    18  * Boston, MA 02111-1307, USA.

    19  */

    20 

    21 /*

    22  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS

    23  * file for a list of people on the GLib Team.  See the ChangeLog

    24  * files for a list of changes.  These files are distributed with

    25  * GLib at ftp://ftp.gtk.org/pub/gtk/. 

    26  */

    27 

    28 /* 

    29  * MT safe

    30  */

    31 

    32 #include "config.h"

    33 #include "glibconfig.h"

    34 

    35 #ifdef HAVE_UNISTD_H

    36 #include <unistd.h>

    37 #endif /* HAVE_UNISTD_H */

    38 

    39 #ifndef G_OS_WIN32

    40 #include <sys/time.h>

    41 #include <time.h>

    42 #include <errno.h>

    43 #endif /* G_OS_WIN32 */

    44 

    45 #ifdef G_OS_WIN32

    46 #include <windows.h>

    47 #endif /* G_OS_WIN32 */

    48 

    49 #include "glib.h"

    50 #include "galias.h"

    51 

    52 #ifdef __SYMBIAN32__

    53 #include <glib_wsd.h>

    54 #endif /* __SYMBIAN32__ */

    55 

    56 #if EMULATOR

    57 #define g_thread_functions_for_glib_use (*_g_thread_functions_for_glib_use())

    58 #define g_thread_use_default_impl (*_g_thread_use_default_impl())

    59 #endif /* EMULATOR */

    60 

    61 

    62 struct _GTimer

    63 {

    64 #ifdef G_OS_WIN32

    65   guint64 start;

    66   guint64 end;

    67 #else /* !G_OS_WIN32 */

    68   struct timeval start;

    69   struct timeval end;

    70 #endif /* !G_OS_WIN32 */

    71 

    72   guint active : 1;

    73 };

    74 

    75 #ifdef G_OS_WIN32

    76 #  define GETTIME(v) \

    77      GetSystemTimeAsFileTime ((FILETIME *)&v)

    78 #else /* !G_OS_WIN32 */

    79 #  define GETTIME(v) \

    80      gettimeofday (&v, NULL)

    81 #endif /* !G_OS_WIN32 */

    82 

    83 EXPORT_C GTimer*

    84 g_timer_new (void)

    85 {

    86   GTimer *timer;

    87   timer = g_new (GTimer, 1);

    88   timer->active = TRUE;

    89 

    90   GETTIME (timer->start);

    91 

    92   return timer;

    93 }

    94 

    95 EXPORT_C void

    96 g_timer_destroy (GTimer *timer)

    97 {

    98   g_return_if_fail (timer != NULL);

    99 

   100   g_free (timer);

   101 }

   102 

   103 EXPORT_C void

   104 g_timer_start (GTimer *timer)

   105 {

   106   g_return_if_fail (timer != NULL);

   107 

   108   timer->active = TRUE;

   109 

   110   GETTIME (timer->start);

   111 }

   112 

   113 EXPORT_C void

   114 g_timer_stop (GTimer *timer)

   115 {

   116   g_return_if_fail (timer != NULL);

   117 

   118   timer->active = FALSE;

   119 

   120   GETTIME(timer->end);

   121 }

   122 

   123 EXPORT_C void

   124 g_timer_reset (GTimer *timer)

   125 {

   126   g_return_if_fail (timer != NULL);

   127 

   128   GETTIME (timer->start);

   129 }

   130 

   131 EXPORT_C void

   132 g_timer_continue (GTimer *timer)

   133 {

   134 #ifdef G_OS_WIN32

   135   guint64 elapsed;

   136 #else

   137   struct timeval elapsed;

   138 #endif /* G_OS_WIN32 */

   139 

   140   g_return_if_fail (timer != NULL);

   141   g_return_if_fail (timer->active == FALSE);

   142 

   143   /* Get elapsed time and reset timer start time

   144    *  to the current time minus the previously

   145    *  elapsed interval.

   146    */

   147 

   148 #ifdef G_OS_WIN32

   149 

   150   elapsed = timer->end - timer->start;

   151 

   152   GETTIME (timer->start);

   153 

   154   timer->start -= elapsed;

   155 

   156 #else /* !G_OS_WIN32 */

   157 

   158   if (timer->start.tv_usec > timer->end.tv_usec)

   159     {

   160       timer->end.tv_usec += G_USEC_PER_SEC;

   161       timer->end.tv_sec--;

   162     }

   163 

   164   elapsed.tv_usec = timer->end.tv_usec - timer->start.tv_usec;

   165   elapsed.tv_sec = timer->end.tv_sec - timer->start.tv_sec;

   166 

   167   GETTIME (timer->start);

   168 

   169   if (timer->start.tv_usec < elapsed.tv_usec)

   170     {

   171       timer->start.tv_usec += G_USEC_PER_SEC;

   172       timer->start.tv_sec--;

   173     }

   174 

   175   timer->start.tv_usec -= elapsed.tv_usec;

   176   timer->start.tv_sec -= elapsed.tv_sec;

   177 

   178 #endif /* !G_OS_WIN32 */

   179 

   180   timer->active = TRUE;

   181 }

   182 

   183 EXPORT_C gdouble

   184 g_timer_elapsed (GTimer *timer,

   185 		 gulong *microseconds)

   186 {

   187   gdouble total;

   188 #ifdef G_OS_WIN32

   189   gint64 elapsed;

   190 #else

   191   struct timeval elapsed;

   192 #endif /* G_OS_WIN32 */

   193 

   194   g_return_val_if_fail (timer != NULL, 0);

   195 

   196 #ifdef G_OS_WIN32

   197   if (timer->active)

   198     GETTIME (timer->end);

   199 

   200   elapsed = timer->end - timer->start;

   201 

   202   total = elapsed / 1e7;

   203 

   204   if (microseconds)

   205     *microseconds = (elapsed / 10) % 1000000;

   206 #else /* !G_OS_WIN32 */

   207   if (timer->active)

   208     gettimeofday (&timer->end, NULL);

   209 

   210   if (timer->start.tv_usec > timer->end.tv_usec)

   211     {

   212       timer->end.tv_usec += G_USEC_PER_SEC;

   213       timer->end.tv_sec--;

   214     }

   215 

   216   elapsed.tv_usec = timer->end.tv_usec - timer->start.tv_usec;

   217   elapsed.tv_sec = timer->end.tv_sec - timer->start.tv_sec;

   218 

   219   total = elapsed.tv_sec + ((gdouble) elapsed.tv_usec / 1e6);

   220   if (total < 0)

   221     {

   222       total = 0;

   223 

   224       if (microseconds)

   225 	*microseconds = 0;

   226     }

   227   else if (microseconds)

   228     *microseconds = elapsed.tv_usec;

   229 

   230 #endif /* !G_OS_WIN32 */

   231 

   232   return total;

   233 }

   234 

   235 EXPORT_C void

   236 g_usleep (gulong microseconds)

   237 {

   238 #ifdef G_OS_WIN32

   239   Sleep (microseconds / 1000);

   240 #else /* !G_OS_WIN32 */

   241 # ifdef HAVE_NANOSLEEP

   242   struct timespec request, remaining;

   243   request.tv_sec = microseconds / G_USEC_PER_SEC;

   244   request.tv_nsec = 1000 * (microseconds % G_USEC_PER_SEC);

   245   while (nanosleep (&request, &remaining) == -1 && errno == EINTR)

   246     request = remaining;

   247 # else /* !HAVE_NANOSLEEP */

   248   if (g_thread_supported ())

   249     {

   250       static GStaticMutex mutex = G_STATIC_MUTEX_INIT;

   251       static GCond* cond = NULL;

   252       GTimeVal end_time;

   253       

   254       g_get_current_time (&end_time);

   255       if (microseconds > G_MAXLONG)

   256 	{

   257 	  microseconds -= G_MAXLONG;

   258 	  g_time_val_add (&end_time, G_MAXLONG);

   259 	}

   260       g_time_val_add (&end_time, microseconds);

   261 

   262       g_static_mutex_lock (&mutex);

   263       

   264       if (!cond)

   265 	cond = g_cond_new ();

   266       

   267       while (g_cond_timed_wait (cond, g_static_mutex_get_mutex (&mutex), 

   268 				&end_time))

   269 	/* do nothing */;

   270       

   271       g_static_mutex_unlock (&mutex);

   272     }

   273   else

   274     {

   275       struct timeval tv;

   276       tv.tv_sec = microseconds / G_USEC_PER_SEC;

   277       tv.tv_usec = microseconds % G_USEC_PER_SEC;

   278       select(0, NULL, NULL, NULL, &tv);

   279     }

   280 # endif /* !HAVE_NANOSLEEP */

   281 #endif /* !G_OS_WIN32 */

   282 }

   283 

   284 /**

   285  * g_time_val_add:

   286  * @time_: a #GTimeVal

   287  * @microseconds: number of microseconds to add to @time

   288  *

   289  * Adds the given number of microseconds to @time_. @microseconds can

   290  * also be negative to decrease the value of @time_.

   291  **/

   292 EXPORT_C void 

   293 g_time_val_add (GTimeVal *time_, glong microseconds)

   294 {

   295   g_return_if_fail (time_->tv_usec >= 0 && time_->tv_usec < G_USEC_PER_SEC);

   296 

   297   if (microseconds >= 0)

   298     {

   299       time_->tv_usec += microseconds % G_USEC_PER_SEC;

   300       time_->tv_sec += microseconds / G_USEC_PER_SEC;

   301       if (time_->tv_usec >= G_USEC_PER_SEC)

   302        {

   303          time_->tv_usec -= G_USEC_PER_SEC;

   304          time_->tv_sec++;

   305        }

   306     }

   307   else

   308     {

   309       microseconds *= -1;

   310       time_->tv_usec -= microseconds % G_USEC_PER_SEC;

   311       time_->tv_sec -= microseconds / G_USEC_PER_SEC;

   312       if (time_->tv_usec < 0)

   313        {

   314          time_->tv_usec += G_USEC_PER_SEC;

   315          time_->tv_sec--;

   316        }      

   317     }

   318 }

   319 

   320 #define __G_TIMER_C__

   321 #include "galiasdef.c"