Changeset 1971 for features/performance/src/common/timer.h

Timestamp:

04/09/08 15:37:35 (9 months ago)

Author:

aturner

Message:

switch to timespec (nanosecond precision) for sleeping. OS X's AbsoluteTime?
methods are really damn accurate! refs #41

Files:

• features/performance/src/common/timer.h (modified) (5 diffs)

features/performance/src/common/timer.h

@@ -52 +52 @@
 
 void timerdiv(struct timeval *tvp, float div);
+void timesdiv(struct timespec *tvs, float div);
 
 /* convert float time to struct timeval *tvp */
@@ -69 +70 @@
 #endif
 
+#ifndef TIMESPEC_TO_TIMEVAL
+#define TIMESPEC_TO_TIMEVAL(tv, ts) {           \
+    (tv)->tv_sec = (ts)->tv_sec;                \
+    (tv)->tv_usec = (ts)->tv_nsec / 1000; }
+#endif
+
 /* zero out a timer */
 #ifndef timerclear
 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
+#endif
+
+/* zero out a timespec */
+#ifndef timesclear
+#define timesclear(tvs)     (tvs)->tv_sec = (tvs)->tv_nsec = 0
 #endif
 
@@ -78 +90 @@
 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 #endif
+
+/* is timespec non-zero? */
+#ifndef timesisset
+#define timesisset(tvs)         ((tvs)->tv_sec || (tvs)->tv_nsec)
+#endif
+
 
 /* add tvp and uvp and store in vvp */
@@ -105 +123 @@
 #endif
 
+#ifndef timessub
+#define timessub(tsp, usp, vsp)                                 \
+        do {                                                                    \
+                (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;          \
+                (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;       \
+                if ((vsp)->tv_nsec < 0) {                               \
+                        (vsp)->tv_sec--;                                    \
+                        (vsp)->tv_nsec += 1000000000;           \
+                }                                                                   \
+        } while (0)
+#endif
+
 /* compare tvp and uvp using cmp */
 #ifndef timercmp
@@ -111 +141 @@
         ((tvp)->tv_usec cmp (uvp)->tv_usec) :           \
         ((tvp)->tv_sec cmp (uvp)->tv_sec))
+#endif
+
+#ifndef timescmp
+#define timescmp(tsp, usp, cmp)                             \
+        (((tsp)->tv_sec == (usp)->tv_sec) ?                 \
+        ((tsp)->tv_nsec cmp (usp)->tv_nsec) :           \
+        ((tsp)->tv_sec cmp (usp)->tv_sec))
 #endif