lib9: make formatting lock-free again

First use of <stdatomic.h>.
We will see if any supported systems don't have it yet.
(C11 was so last decade.)

Fixes #338.

1 files changed, 2 insertions, 12 deletions

diff --git a/src/lib9/fmt/fmtlock.c b/src/lib9/fmt/fmtlock.c
index eb9cd845..cabe05f4 100644
--- a/src/lib9/fmt/fmtlock.c
+++ b/src/lib9/fmt/fmtlock.c
@@ -5,21 +5,11 @@
 #include "fmtdef.h"
 
 void
-__fmtrlock(void)
+__fmtlock(void)
 {
 }
 
 void
-__fmtrunlock(void)
-{
-}
-
-void
-__fmtwlock(void)
-{
-}
-
-void
-__fmtwunlock(void)
+__fmtunlock(void)
 {
 }