Changes between Version 25 and Version 26 of Developer/SMP

Timestamp:

01/13/14 16:02:05 (10 years ago)

Author:

Sh

Comment:

/* Non-Preempt Mode for Mutual Exclusion */

Developer/SMP

@@ -405 +405 @@
 = = Task Variables  ==
 
-=  === Status ====
+==  Status  ==
 
 
@@ -412 +412 @@
 of the executing thread.  For Newlib the access to the re-entrancy structure is
 now performed via ''__getreent()'',  see also ''__DYNAMIC_REENT__'' in Newlib.
-
-==== Future Directions ====
+=  === Future Directions ====
 
 
@@ -423 +422 @@
 
 
+==== Status ====
+
+
+Disabling of thread preemption cannot be used to ensure mutual exclusion on SMP.
+The non-preempt mode is disabled on SMP and a run-time error will occur if such
+a mode change request is issued.  The alternatives are mutexes and condition
+variables.
+
+==== Future Directions ====
+
+
+ *  Add condition variables to the Classic API.
+ *  Fix pthread_once().
+ *  Fix the block device cache ''bdbuf''.
+ *  Fix C++ support.
+
 === Thread Restart ===