libbb: shrink monotonic_XXX functions, introduce monotonic_ns
(unused for now)
function old new delta
get_mono - 31 +31
sv_main 1228 1234 +6
expand 1693 1697 +4
get_address 178 181 +3
utoa_to_buf 108 110 +2
builtin_exit 46 48 +2
qrealloc 36 33 -3
qgravechar 109 106 -3
ash_main 1383 1380 -3
grep_file 850 846 -4
popstring 140 134 -6
monotonic_us 85 60 -25
monotonic_sec 41 16 -25
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 5/7 up/down: 48/-69) Total: -21 bytes
diff --git a/include/libbb.h b/include/libbb.h
index d74f802..7bc0dca 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -237,6 +237,7 @@
#define errno (*bb_errno)
#endif
+unsigned long long monotonic_ns(void) FAST_FUNC;
unsigned long long monotonic_us(void) FAST_FUNC;
unsigned monotonic_sec(void) FAST_FUNC;