feat: set RT_USING_STDC_ATOMIC to first priority

RT_USING_STDC_ATOMIC is a user selected option on current config system.
While the RT_USING_HW_ATOMIC is a forced option selected by Kconfig
under libcpu. And the RT_USING_STDC_ATOMIC will be meaningless if we set
RT_USING_HW_ATOMIC to first priority if the arch has hw-atomic.

Changes:
- set RT_USING_STDC_ATOMIC to first priority on rttypes.h

Signed-off-by: Shell <smokewood@qq.com>

include/rtatomic.h

@@ -27,20 +27,7 @@ void rt_hw_atomic_flag_clear(volatile rt_atomic_t *ptr);
 rt_atomic_t rt_hw_atomic_flag_test_and_set(volatile rt_atomic_t *ptr);
 rt_atomic_t rt_hw_atomic_compare_exchange_strong(volatile rt_atomic_t *ptr, rt_atomic_t *expected, rt_atomic_t desired);
 
-#if defined(RT_USING_HW_ATOMIC)
-#define rt_atomic_load(ptr) rt_hw_atomic_load(ptr)
-#define rt_atomic_store(ptr, v) rt_hw_atomic_store(ptr, v)
-#define rt_atomic_add(ptr, v) rt_hw_atomic_add(ptr, v)
-#define rt_atomic_sub(ptr, v) rt_hw_atomic_sub(ptr, v)
-#define rt_atomic_and(ptr, v) rt_hw_atomic_and(ptr, v)
-#define rt_atomic_or(ptr, v)  rt_hw_atomic_or(ptr, v)
-#define rt_atomic_xor(ptr, v) rt_hw_atomic_xor(ptr, v)
-#define rt_atomic_exchange(ptr, v) rt_hw_atomic_exchange(ptr, v)
-#define rt_atomic_flag_clear(ptr) rt_hw_atomic_flag_clear(ptr)
-#define rt_atomic_flag_test_and_set(ptr) rt_hw_atomic_flag_test_and_set(ptr)
-#define rt_atomic_compare_exchange_strong(ptr, v,des) rt_hw_atomic_compare_exchange_strong(ptr, v ,des)
-
-#elif defined(RT_USING_STDC_ATOMIC)
+#if defined(RT_USING_STDC_ATOMIC)
 
 #ifndef __STDC_NO_ATOMICS__
 #define rt_atomic_load(ptr) atomic_load(ptr)
@@ -58,6 +45,19 @@ rt_atomic_t rt_hw_atomic_compare_exchange_strong(volatile rt_atomic_t *ptr, rt_a
 #error "The standard library C doesn't support the atomic operation"
 #endif /* __STDC_NO_ATOMICS__ */
 
+#elif defined(RT_USING_HW_ATOMIC)
+#define rt_atomic_load(ptr) rt_hw_atomic_load(ptr)
+#define rt_atomic_store(ptr, v) rt_hw_atomic_store(ptr, v)
+#define rt_atomic_add(ptr, v) rt_hw_atomic_add(ptr, v)
+#define rt_atomic_sub(ptr, v) rt_hw_atomic_sub(ptr, v)
+#define rt_atomic_and(ptr, v) rt_hw_atomic_and(ptr, v)
+#define rt_atomic_or(ptr, v)  rt_hw_atomic_or(ptr, v)
+#define rt_atomic_xor(ptr, v) rt_hw_atomic_xor(ptr, v)
+#define rt_atomic_exchange(ptr, v) rt_hw_atomic_exchange(ptr, v)
+#define rt_atomic_flag_clear(ptr) rt_hw_atomic_flag_clear(ptr)
+#define rt_atomic_flag_test_and_set(ptr) rt_hw_atomic_flag_test_and_set(ptr)
+#define rt_atomic_compare_exchange_strong(ptr, v,des) rt_hw_atomic_compare_exchange_strong(ptr, v ,des)
+
 #else
 #include <rthw.h>
 #define rt_atomic_load(ptr) rt_soft_atomic_load(ptr)

include/rttypes.h

@@ -78,14 +78,19 @@ typedef rt_base_t                       rt_flag_t;      /**< Type for flags */
 typedef rt_ubase_t                      rt_dev_t;       /**< Type for device */
 typedef rt_base_t                       rt_off_t;       /**< Type for offset */
 
+#if defined(RT_USING_STDC_ATOMIC) && __STDC_VERSION__ < 201112L
+#undef RT_USING_STDC_ATOMIC
+#warning Not using C11 or beyond! Maybe you should change the -std option on your compiler
+#endif
+
 #ifdef __cplusplus
     typedef rt_base_t rt_atomic_t;
 #else
-    #if defined(RT_USING_HW_ATOMIC)
-        typedef rt_base_t rt_atomic_t;
-    #elif defined(RT_USING_STDC_ATOMIC)
+    #if defined(RT_USING_STDC_ATOMIC)
         #include <stdatomic.h>
-        typedef atomic_intptr_t rt_atomic_t;
+        typedef _Atomic(rt_base_t) rt_atomic_t;
+    #elif defined(RT_USING_HW_ATOMIC)
+        typedef rt_base_t rt_atomic_t;
     #else
         typedef rt_base_t rt_atomic_t;
     #endif /* RT_USING_STDC_ATOMIC */