gallium: OS independent time-manipulation functions.

1 files changed, 152 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_time.c b/src/gallium/auxiliary/util/u_time.c
new file mode 100644
index 0000000000..e6c0b19ff6
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_time.c
@@ -0,0 +1,152 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * OS independent time-manipulation functions.
+ * 
+ * @author Jose Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+
+#ifndef WIN32
+#include <sys/time.h>
+#else
+#include <windows.h>
+#include <winddi.h>
+#endif
+
+#include "util/u_time.h"
+
+
+#ifdef WIN32
+static LONGLONG frequency = 0;
+#endif
+
+
+void 
+util_time_get(struct util_time *t)
+{
+#ifndef WIN32
+   gettimeofday(&t->tv, NULL);
+#else
+   EngQueryPerformanceCounter(&t->counter);
+#endif
+}
+
+
+void 
+util_time_add(const struct util_time *t1,
+              int64_t usecs,
+              struct util_time *t2)
+{
+#ifndef WIN32
+   t2->tv.tv_sec = t1->tv.tv_sec + usecs / 1000000;
+   t2->tv.tv_usec = t1->tv.tv_usec + usecs % 1000000;
+#else
+   if(!frequency)
+      EngQueryPerformanceFrequency(&frequency);
+   t2->counter = t1->counter + (usecs * frequency + 999999LL)/1000000LL;
+#endif
+}
+
+
+int64_t
+util_time_diff(const struct util_time *t1, 
+               const struct util_time *t2)
+{
+#ifndef WIN32
+   return (t2->tv.tv_usec - t1->tv.tv_usec) + 
+          (t2->tv.tv_sec - t1->tv.tv_sec)*1000000;
+#else
+   return (t2->counter - t1->counter)*1000000LL/frequency;
+#endif
+}
+
+
+/**
+ * Compare two time values.
+ * 
+ * Not publicly available because it does not take in account wrap-arounds. 
+ * Use util_time_timeout instead.
+ */
+static INLINE int
+util_time_compare(const struct util_time *t1, 
+                  const struct util_time *t2)
+{
+#ifndef WIN32
+   if (t1->tv.tv_sec < t2->tv.tv_sec)
+      return -1;
+   else if(t1->tv.tv_sec > t2->tv.tv_sec)
+      return 1;
+   else if (t1->tv.tv_usec < t2->tv.tv_usec)
+      return -1;
+   else if(t1->tv.tv_usec > t2->tv.tv_usec)
+      return 1;
+   else 
+      return 0;
+#else
+   if (t1->counter < t2->counter)
+      return -1;
+   else if(t1->counter > t2->counter)
+      return 1;
+   else 
+      return 0;
+#endif
+}
+
+
+int 
+util_time_timeout(const struct util_time *start, 
+                  const struct util_time *end,
+                  const struct util_time *curr) 
+{
+   if(util_time_compare(start, end) <= 0)
+      return util_time_compare(start, curr) <= 0 && util_time_compare(curr, end) < 0;
+   else
+      return util_time_compare(start, curr) <= 0 || util_time_compare(curr, end) < 0;
+}
+
+
+#ifdef WIN32
+void util_time_usleep(unsigned usecs)
+{
+   LONGLONG start, curr, end;
+   
+   EngQueryPerformanceCounter(&start);
+   
+   if(!frequency)
+      EngQueryPerformanceFrequency(&frequency);
+   
+   end = start + (usecs * frequency + 999999LL)/1000000LL;
+   
+   do {
+      EngQueryPerformanceCounter(&curr);
+   } while(start <= curr && curr < end || 
+	   end < start && (curr < end || start <= curr));
+}
+#endif