From 90931ae6fc58ad23af4bcc4fe58acabe155a2846 Mon Sep 17 00:00:00 2001
From: Dmitri Vorobyov <41331069+vdaxtr@users.noreply.github.com>
Date: Fri, 20 Aug 2021 12:28:11 +0300
Subject: [PATCH] fix try_lock in gcc mutex (#415)

---
 include/etl/mutex/mutex_gcc_sync.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/etl/mutex/mutex_gcc_sync.h b/include/etl/mutex/mutex_gcc_sync.h
index 7e909ab1..298497c0 100644
--- a/include/etl/mutex/mutex_gcc_sync.h
+++ b/include/etl/mutex/mutex_gcc_sync.h
@@ -61,7 +61,7 @@ namespace etl
 
     bool try_lock()
     {
-      return (__sync_lock_test_and_set(&flag, 1U) == 1U);
+      return (__sync_lock_test_and_set(&flag, 1U) == 0U);
     }
 
     void unlock()