Add state saving functions and update processTrace accordingly.

[lttv.git] / ltt / branches / poly / include / ltt / time.h

diff --git a/ltt/branches/poly/include/ltt/time.h b/ltt/branches/poly/include/ltt/time.h
new file mode 100644 (file)
index 0000000..4f80943
--- /dev/null
+++ b/ltt/branches/poly/include/ltt/time.h
@@ -0,0 +1,94 @@
+#ifndef LTT_TIME_H
+#define LTT_TIME_H
+
+
+typedef struct _LttTime {
+  unsigned long tv_sec;
+  unsigned long tv_nsec;
+} LttTime;
+
+
+static const unsigned long NANOSECONDS_PER_SECOND = 1000000000;
+
+static const LttTime ltt_time_zero = { 0, 0};
+
+
+static inline LttTime ltt_time_sub(LttTime t1, LttTime t2) 
+{
+  LttTime res;
+  res.tv_sec  = t1.tv_sec  - t2.tv_sec;
+  if(t1.tv_nsec < t2.tv_nsec) {
+    res.tv_sec--;
+    res.tv_nsec = NANOSECONDS_PER_SECOND + t1.tv_nsec - t2.tv_nsec;
+  }
+  else {
+    res.tv_nsec = t1.tv_nsec - t2.tv_nsec;
+  }
+  return res;
+}
+
+
+static inline LttTime ltt_time_add(LttTime t1, LttTime t2) 
+{
+  LttTime res;
+  res.tv_sec  = t1.tv_sec  + t2.tv_sec;
+  res.tv_nsec = t1.tv_nsec + t2.tv_nsec;
+  if(res.tv_nsec >= NANOSECONDS_PER_SECOND) {
+    res.tv_sec++;
+    res.tv_nsec -= NANOSECONDS_PER_SECOND;
+  }
+  return res;
+}
+
+
+static inline LttTime ltt_time_mul(LttTime t1, float f)
+{
+  double nsec;
+  LttTime res;
+
+  nsec = (double)t1.tv_nsec * f;
+  res.tv_sec = nsec / NANOSECONDS_PER_SECOND;
+  res.tv_nsec = nsec - res.tv_sec * NANOSECONDS_PER_SECOND;
+  res.tv_sec += t1.tv_sec * f;
+  return res;
+}
+
+
+static inline LttTime ltt_time_div(LttTime t1, float f)
+{
+  double sec;
+  LttTime res;
+
+  sec = t1.tv_sec / (double)f;
+  res.tv_sec = sec;
+  res.tv_nsec = t1.tv_nsec / (double)f + (sec - res.tv_sec) *
+      NANOSECONDS_PER_SECOND;
+  return res;
+}
+
+
+static inline int ltt_time_compare(LttTime t1, LttTime t2)
+{
+  if(t1.tv_sec > t2.tv_sec) return 1;
+  if(t1.tv_sec < t2.tv_sec) return -1;
+  if(t1.tv_nsec > t2.tv_nsec) return 1;
+  if(t1.tv_nsec < t2.tv_nsec) return -1;
+  return 0;
+}
+
+
+static inline double ltt_time_to_double(LttTime t1)
+{
+  return (double)t1.tv_sec + (double)t1.tv_nsec / NANOSECONDS_PER_SECOND;
+}
+
+
+static inline LttTime ltt_time_from_double(double t1)
+{
+  LttTime res;
+  res.tv_sec = t1;
+  res.tv_nsec = (t1 - res.tv_sec) * NANOSECONDS_PER_SECOND;
+  return res;
+}
+
+#endif // LTT_TIME_H