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-rw-r--r--sim/common/sim-utils.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/sim/common/sim-utils.h b/sim/common/sim-utils.h
index dfb991c..cd7cc59c 100644
--- a/sim/common/sim-utils.h
+++ b/sim/common/sim-utils.h
@@ -34,9 +34,11 @@ char *sim_add_commas (char *, int, unsigned long);
/* Utilities for elapsed time reporting. */
-/* Opaque type, known only inside sim_elapsed_time_foo fns. */
+/* Opaque type, known only inside sim_elapsed_time_foo fns. Externally
+ it is known to never have the value zero. */
typedef unsigned long SIM_ELAPSED_TIME;
+
/* Get reference point for future call to sim_time_elapsed. */
SIM_ELAPSED_TIME sim_elapsed_time_get (void);