score: Use self-contained API mutex

Use a self-contained recursive mutex for API_Mutex_Control.  The API
mutexes are protected against asynchronous thread cancellation.

Add dedicated mutexes for libatomic and TOD.

Close #2629.
Close #2630.

1 files changed, 5 insertions, 13 deletions

diff --git a/cpukit/score/src/apimutexunlock.c b/cpukit/score/src/apimutexunlock.c
index e1fe6459d3..b4a5592059 100644
--- a/cpukit/score/src/apimutexunlock.c
+++ b/cpukit/score/src/apimutexunlock.c
@@ -20,25 +20,17 @@
 #endif
 
 #include <rtems/score/apimutex.h>
-#include <rtems/score/coremuteximpl.h>
+#include <rtems/score/threadimpl.h>
 
 void _API_Mutex_Unlock( API_Mutex_Control *the_mutex )
 {
-  Thread_queue_Context queue_context;
-  Thread_Life_state    previous_thread_life_state;
-  bool                 restore_thread_life_protection;
+  Thread_Life_state previous_thread_life_state;
+  bool              restore_thread_life_protection;
 
   previous_thread_life_state = the_mutex->previous_thread_life_state;
-  restore_thread_life_protection = the_mutex->Mutex.nest_level == 0;
+  restore_thread_life_protection = the_mutex->Mutex._nest_level == 0;
 
-  _Thread_queue_Context_initialize( &queue_context );
-  _ISR_lock_ISR_disable( &queue_context.Lock_context.Lock_context );
-  _CORE_recursive_mutex_Surrender(
-    &the_mutex->Mutex,
-    CORE_MUTEX_TQ_PRIORITY_INHERIT_OPERATIONS,
-    _Thread_Executing,
-    &queue_context
-  );
+  _Mutex_recursive_Release( &the_mutex->Mutex );
 
   if ( restore_thread_life_protection ) {
     _Thread_Set_life_protection( previous_thread_life_state );