score: Delete _Assert_Owner_of_giant()

Add _Debug_Is_owner_of_giant().  This makes it possible to assert the
opposite.

cpukit/score/include/rtems/score/assert.h

@@ -49,12 +49,14 @@ extern "C" {
 #endif
 
 /**
- * @brief Asserts that current thread of execution owns the giant lock.
+ * @brief Returns true if the current thread of execution owns the giant lock.
  */
-#if defined( RTEMS_DEBUG ) && defined( RTEMS_SMP )
-  void _Assert_Owner_of_giant( void );
-#else
-  #define _Assert_Owner_of_giant() ( ( void ) 0 )
+#if defined( RTEMS_DEBUG )
+  #if defined( RTEMS_SMP )
+    bool _Debug_Is_owner_of_giant( void );
+  #else
+    #define _Debug_Is_owner_of_giant() (true)
+  #endif
 #endif
 
 #ifdef __cplusplus

cpukit/score/include/rtems/score/isrlevel.h

@@ -58,7 +58,7 @@ typedef uint32_t   ISR_Level;
 #define _ISR_Disable( _level ) \
   do { \
     _CPU_ISR_Disable( _level ); \
-    _Assert_Owner_of_giant(); \
+    _Assert( _Debug_Is_owner_of_giant() ); \
     RTEMS_COMPILER_MEMORY_BARRIER(); \
   } while (0)
 
@@ -76,7 +76,7 @@ typedef uint32_t   ISR_Level;
 #define _ISR_Enable( _level ) \
   do { \
     RTEMS_COMPILER_MEMORY_BARRIER(); \
-    _Assert_Owner_of_giant(); \
+    _Assert( _Debug_Is_owner_of_giant() ); \
     _CPU_ISR_Enable( _level ); \
   } while (0)
 
@@ -102,7 +102,7 @@ typedef uint32_t   ISR_Level;
 #define _ISR_Flash( _level ) \
   do { \
     RTEMS_COMPILER_MEMORY_BARRIER(); \
-    _Assert_Owner_of_giant(); \
+    _Assert( _Debug_Is_owner_of_giant() ); \
     _CPU_ISR_Flash( _level ); \
     RTEMS_COMPILER_MEMORY_BARRIER(); \
   } while (0)

cpukit/score/src/threaddispatchdisablelevel.c

@@ -142,13 +142,11 @@ void _Giant_Release( void )
 }
 
 #if defined( RTEMS_DEBUG )
-void _Assert_Owner_of_giant( void )
+bool _Debug_Is_owner_of_giant( void )
 {
   Giant_Control *giant = &_Giant;
 
-  _Assert(
-    giant->owner_cpu == _SMP_Get_current_processor()
-      || !_System_state_Is_up( _System_state_Get() )
-  );
+  return giant->owner_cpu == _SMP_Get_current_processor()
+    || !_System_state_Is_up( _System_state_Get() );
 }
 #endif