Update TODO again

2016-12-08 13:34:18 -06:00 · 2016-12-08 13:34:18 -06:00 · a692a4cc46
commit a692a4cc46
parent 7d750e4187
1 changed files with 12 additions and 3 deletions
--- a/15
+++ b/15
@ -536,9 +536,18 @@ o pthreads (sched/pthreads)
               functions that are cancellation points on OpenGroup.org.  In
               general:

-               - Remove asynchronous cancellation.  All cancellations must
-                 pend.
-               - Check if the thread is within cancellation region, then
+               - Two types of cancellation.  DEFFERRED and ASYCNCHOOUS:
+                 PTHREAD_CANCEL_DEFERRED: A cancellation request is deferred
+                   until the thread next calls a function that is a cancellation
+                   point.  This is the default cancelability type for all
+                   threads.
+                 PTHREAD_CANCEL_ASYNCHRONOUS: The thread can be canceled at
+                   any time
+                 DEFERRED should be the default but currently only
+                 asyncrhononous is supported by NuttX
+               - To implement DEFERRED mode:
+                 All cancellations must pend.
+                 Check if the thread is within cancellation region, then
                 treat like a signal to wake up with -ECANCELED vs -EINTER

               For each function/cancellation point