From da46a8fab285649c0ea21c63c897680da867daef Mon Sep 17 00:00:00 2001
From: Marko Car <Marko Car>
Date: Wed, 24 May 2017 13:36:16 +0200
Subject: [PATCH] fixed usage of atomic operation lib for armcc compiler, added
 conditional compilation

---
 .../driver/include/uavcan_stm32/thread.hpp     | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/libuavcan_drivers/stm32/driver/include/uavcan_stm32/thread.hpp b/libuavcan_drivers/stm32/driver/include/uavcan_stm32/thread.hpp
index fe74e50357..6557cfee13 100644
--- a/libuavcan_drivers/stm32/driver/include/uavcan_stm32/thread.hpp
+++ b/libuavcan_drivers/stm32/driver/include/uavcan_stm32/thread.hpp
@@ -142,17 +142,29 @@ public:
     {
         (void)duration;
         bool lready = ready;
-        return __atomic_exchange_n (&lready, false, __ATOMIC_SEQ_CST);
+				#if defined ( __CC_ARM   )
+						return __sync_lock_test_and_set(&lready, false);
+				#elif defined   (  __GNUC__  )
+						return __atomic_exchange_n (&lready, false, __ATOMIC_SEQ_CST);
+				#endif
     }
 
     void signal()
     {
-        __atomic_store_n (&ready, true, __ATOMIC_SEQ_CST);
+				#if defined ( __CC_ARM   )
+						__sync_lock_release(&ready);
+				#elif defined   (  __GNUC__  )
+						__atomic_store_n (&ready, true, __ATOMIC_SEQ_CST);
+				#endif
     }
 
     void signalFromInterrupt()
     {
-        __atomic_store_n (&ready, true, __ATOMIC_SEQ_CST);
+				#if defined ( __CC_ARM   )
+						__sync_lock_release(&ready);
+				#elif defined   (  __GNUC__  )
+						__atomic_store_n (&ready, true, __ATOMIC_SEQ_CST);
+				#endif
     }
 };