From 34262d4d56295b0872ad4e9a4a4791953f3fa444 Mon Sep 17 00:00:00 2001 From: Sergey Matov Date: Tue, 15 Sep 2020 13:40:55 +0400 Subject: vlib: add decrement counter method Currently there is no way to decrease simple counter. To extend counters API new method allows to decrement counter by given value. This might be useful in implementation of statistics stored in stats segment. Type: improvement Change-Id: I7c08c62bffa6a2d50e9e2cf884f7b2d48538f34b Signed-off-by: Sergey Matov Signed-off-by: Dave Barach --- src/vlib/counter.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) 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 -- cgit 1.2.3-korg