| /* GLIB - Library of useful routines for C programming |
| * 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 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 |
| * Lesser General Public License for more details. |
| * |
| * 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. |
| */ |
| |
| /* |
| * 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 |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include "glib.h" |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif /* HAVE_UNISTD_H */ |
| #ifndef G_OS_WIN32 |
| #include <sys/time.h> |
| #endif /* G_OS_WIN32 */ |
| |
| #ifdef G_OS_WIN32 |
| #include <windows.h> |
| #endif /* G_OS_WIN32 */ |
| |
| typedef struct _GRealTimer GRealTimer; |
| |
| struct _GRealTimer |
| { |
| #ifdef G_OS_WIN32 |
| DWORD start; |
| DWORD end; |
| #else /* !G_OS_WIN32 */ |
| struct timeval start; |
| struct timeval end; |
| #endif /* !G_OS_WIN32 */ |
| |
| 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 */ |
| |
| GTimer* |
| g_timer_new (void) |
| { |
| GRealTimer *timer; |
| |
| timer = g_new (GRealTimer, 1); |
| timer->active = TRUE; |
| |
| GETTIME (timer->start); |
| |
| return ((GTimer*) timer); |
| } |
| |
| void |
| g_timer_destroy (GTimer *timer) |
| { |
| g_return_if_fail (timer != NULL); |
| |
| g_free (timer); |
| } |
| |
| void |
| g_timer_start (GTimer *timer) |
| { |
| GRealTimer *rtimer; |
| |
| g_return_if_fail (timer != NULL); |
| |
| rtimer = (GRealTimer*) timer; |
| rtimer->active = TRUE; |
| |
| GETTIME (rtimer->start); |
| } |
| |
| void |
| g_timer_stop (GTimer *timer) |
| { |
| GRealTimer *rtimer; |
| |
| g_return_if_fail (timer != NULL); |
| |
| rtimer = (GRealTimer*) timer; |
| rtimer->active = FALSE; |
| |
| GETTIME(rtimer->end); |
| } |
| |
| void |
| g_timer_reset (GTimer *timer) |
| { |
| GRealTimer *rtimer; |
| |
| g_return_if_fail (timer != NULL); |
| |
| rtimer = (GRealTimer*) timer; |
| |
| GETTIME (rtimer->start); |
| } |
| |
| gdouble |
| g_timer_elapsed (GTimer *timer, |
| gulong *microseconds) |
| { |
| GRealTimer *rtimer; |
| gdouble total; |
| #ifndef G_OS_WIN32 |
| struct timeval elapsed; |
| #endif /* G_OS_WIN32 */ |
| |
| g_return_val_if_fail (timer != NULL, 0); |
| |
| rtimer = (GRealTimer*) timer; |
| |
| #ifdef G_OS_WIN32 |
| if (rtimer->active) |
| rtimer->end = GetTickCount (); |
| |
| /* Check for wraparound, which happens every 49.7 days. */ |
| if (rtimer->end < rtimer->start) |
| total = (UINT_MAX - (rtimer->start - rtimer->end)) / 1000.0; |
| else |
| total = (rtimer->end - rtimer->start) / 1000.0; |
| |
| if (microseconds) |
| { |
| if (rtimer->end < rtimer->start) |
| *microseconds = |
| ((UINT_MAX - (rtimer->start - rtimer->end)) % 1000) * 1000; |
| else |
| *microseconds = |
| ((rtimer->end - rtimer->start) % 1000) * 1000; |
| } |
| #else /* !G_OS_WIN32 */ |
| if (rtimer->active) |
| gettimeofday (&rtimer->end, NULL); |
| |
| if (rtimer->start.tv_usec > rtimer->end.tv_usec) |
| { |
| rtimer->end.tv_usec += G_USEC_PER_SEC; |
| rtimer->end.tv_sec--; |
| } |
| |
| elapsed.tv_usec = rtimer->end.tv_usec - rtimer->start.tv_usec; |
| elapsed.tv_sec = rtimer->end.tv_sec - rtimer->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 */ |
| |
| return total; |
| } |
| |
| void |
| g_usleep (gulong microseconds) |
| { |
| #ifdef G_OS_WIN32 |
| Sleep (microseconds / 1000); |
| #else |
| if (g_thread_supported ()) |
| { |
| static GStaticMutex mutex = G_STATIC_MUTEX_INIT; |
| static GCond* cond = NULL; |
| GTimeVal end_time; |
| |
| g_get_current_time (&end_time); |
| |
| end_time.tv_sec += microseconds / G_USEC_PER_SEC; |
| end_time.tv_usec += microseconds % G_USEC_PER_SEC; |
| |
| if (end_time.tv_usec >= G_USEC_PER_SEC) |
| { |
| end_time.tv_usec -= G_USEC_PER_SEC; |
| end_time.tv_sec += 1; |
| } |
| |
| g_static_mutex_lock (&mutex); |
| |
| if (!cond) |
| cond = g_cond_new (); |
| |
| while (g_cond_timed_wait (cond, g_static_mutex_get_mutex (&mutex), |
| &end_time)) |
| /* do nothing */; |
| |
| g_static_mutex_unlock (&mutex); |
| } |
| else |
| { |
| struct timeval tv; |
| tv.tv_sec = microseconds / G_USEC_PER_SEC; |
| tv.tv_usec = microseconds % G_USEC_PER_SEC; |
| select(0, NULL, NULL, NULL, &tv); |
| } |
| #endif |
| } |
| |