make all library-internal static buffers thread-local

We have a number of library-internal static global buffers which are
mainly used for various stringification functions.  This worked as
all of the related Osmocom programs were strictly single-threaded.

Let's make those buffers at least thread-local.  This way every thread
gets their own set of buffers, and it's safe for multiple threads to
execute the same functions once.  They're of course still not
re-entrant.  If you need re-entrancy, you will need to use the _c()
or _buf() suffix version of those functions and work with your own
(stack or heap) buffers.

Change-Id: I50eb2436a7c1261d79a9d2955584dce92780ca07

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gb/gprs_ns.c b/src/gb/gprs_ns.c
index cee48855..c77ebb37 100644
--- a/src/gb/gprs_ns.c
+++ b/src/gb/gprs_ns.c
@@ -1552,7 +1552,7 @@ char *gprs_ns_ll_str_buf(char *buf, size_t buf_len, const struct gprs_nsvc *nsvc
 
 const char *gprs_ns_ll_str(const struct gprs_nsvc *nsvc)
 {
-	static char buf[80];
+	static __thread char buf[80];
 	return gprs_ns_ll_str_buf(buf, sizeof(buf), nsvc);
 }