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-rw-r--r--src/vlib/counter.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/src/vlib/counter.h b/src/vlib/counter.h
index 8a5aed4c194..04ab83769cc 100644
--- a/src/vlib/counter.h
+++ b/src/vlib/counter.h
@@ -84,6 +84,25 @@ vlib_increment_simple_counter (vlib_simple_counter_main_t * cm,
my_counters[index] += increment;
}
+/** Decrement a simple counter
+ @param cm - (vlib_simple_counter_main_t *) simple counter main pointer
+ @param thread_index - (u32) the current cpu index
+ @param index - (u32) index of the counter to increment
+ @param increment - (u64) quantitiy remove from the counter value
+*/
+always_inline void
+vlib_decrement_simple_counter (vlib_simple_counter_main_t * cm,
+ u32 thread_index, u32 index, u64 decrement)
+{
+ counter_t *my_counters;
+
+ my_counters = cm->counters[thread_index];
+
+ ASSERT (my_counters[index] >= decrement);
+
+ my_counters[index] -= decrement;
+}
+
/** Set a simple counter
@param cm - (vlib_simple_counter_main_t *) simple counter main pointer
@param thread_index - (u32) the current cpu index