X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=ltt%2Fbranches%2Fpoly%2Finclude%2Fltt%2Fltt.h;h=17303a08922b1ef52ceabae27854f0a8ac786968;hb=02007847f865c0d2f50979b5ceecbdeec5ef7b97;hp=7c347414926d7804d2119128b646c2a89924124b;hpb=290dfc8c6f0882260a7a1c39b87873016d678d0b;p=lttv.git

diff --git a/ltt/branches/poly/include/ltt/ltt.h b/ltt/branches/poly/include/ltt/ltt.h
index 7c347414..17303a08 100644
--- a/ltt/branches/poly/include/ltt/ltt.h
+++ b/ltt/branches/poly/include/ltt/ltt.h
@@ -61,6 +61,7 @@ typedef struct _LttField LttField;
 
 typedef struct _LttEvent LttEvent;
 
+typedef struct _LttSystemDescription LttSystemDescription;
 
 /* Checksums are used to differentiate facilities which have the same name
    but differ. */
@@ -93,6 +94,33 @@ typedef enum _LttArchEndian
 { LTT_LITTLE_ENDIAN, LTT_BIG_ENDIAN
 } LttArchEndian;
 
+/* Time operation macros for LttTime (struct timespec) */
+/*  (T3 = T2 - T1) */
+#define TimeSub(T3, T2, T1) \
+do \
+{\
+  (T3).tv_sec  = (T2).tv_sec  - (T1).tv_sec;  \
+  (T3).tv_nsec = (T2).tv_nsec - (T1).tv_nsec; \
+  if((T3).tv_nsec < 0)\
+    {\
+    (T3).tv_sec--;\
+    (T3).tv_nsec += 1000000000;\
+    }\
+} while(0)
+
+/*  (T3 = T2 + T1) */
+#define TimeAdd(T3, T2, T1) \
+do \
+{\
+  (T3).tv_sec  = (T2).tv_sec  + (T1).tv_sec;  \
+  (T3).tv_nsec = (T2).tv_nsec + (T1).tv_nsec; \
+  if((T3).tv_nsec >= 1000000000)\
+    {\
+    (T3).tv_sec += (T3).tv_nsec / 1000000000;\
+    (T3).tv_nsec = (T3).tv_nsec % 1000000000;\
+    }\
+} while(0)
+
 
 
 #include <ltt/ltt-private.h>