2008-01-22 Joel Sherrill <joel.sherrill@oarcorp.com>

	* rtems/include/rtems/rtems/event.h,
	rtems/inline/rtems/rtems/eventset.inl, rtems/src/event.c,
	rtems/src/eventseize.c, rtems/src/eventsurrender.c,
	rtems/src/eventtimeout.c, score/Makefile.am, score/preinstall.am,
	score/include/rtems/score/interr.h,
	score/include/rtems/score/thread.h,
	score/include/rtems/score/threadq.h,
	score/include/rtems/score/tqdata.h,
	score/inline/rtems/score/threadq.inl,
	score/inline/rtems/score/tqdata.inl, score/src/threadq.c,
	score/src/threadqdequeue.c, score/src/threadqdequeuefifo.c,
	score/src/threadqdequeuepriority.c, score/src/threadqenqueue.c,
	score/src/threadqenqueuefifo.c, score/src/threadqenqueuepriority.c,
	score/src/threadqextract.c, score/src/threadqextractfifo.c,
	score/src/threadqextractpriority.c,
	score/src/threadqextractwithproxy.c, score/src/threadqfirst.c,
	score/src/threadqfirstfifo.c, score/src/threadqfirstpriority.c,
	score/src/threadqflush.c, score/src/threadqrequeue.c,
	score/src/threadqtimeout.c: Refactor thread queue enqueue and event
	blocking synchronization critical sections. This resulted in three
	copies of essentially the same hard to test critical section code
	becoming the one shared routine _Thread_blocking_operation_Cancel. In
	addition, the thread queue and event code now share a common
	synchronization enumerated type. Along the way, switches were
	reworked to eliminate dead code generated by gcc and comments and
	copyrights were updated.
	* score/include/rtems/score/threadsync.h,
	score/src/threadblockingoperationcancel.c: New files.

1 files changed, 22 insertions, 1 deletions

diff --git a/cpukit/score/include/rtems/score/thread.h b/cpukit/score/include/rtems/score/thread.h
index 9b9f324b9e..fcf26c9507 100644
--- a/cpukit/score/include/rtems/score/thread.h
+++ b/cpukit/score/include/rtems/score/thread.h
@@ -6,7 +6,7 @@
  */
 
 /*
- *  COPYRIGHT (c) 1989-2007.
+ *  COPYRIGHT (c) 1989-2008.
  *  On-Line Applications Research Corporation (OAR).
  *
  *  The license and distribution terms for this file may be
@@ -785,6 +785,27 @@ Thread_Control *_Thread_Get (
   Objects_Locations *location
 );
 
+/**
+ *  @brief Cancel a blocking operation due to ISR
+ *
+ *  This method is used to cancel a blocking operation that was
+ *  satisfied from an ISR while the thread executing was in the
+ *  process of blocking.
+ *
+ *  @param[in] sync_state is the synchronization state
+ *  @param[in] the_thread is the thread whose blocking is canceled
+ *  @param[in] level is the previous ISR disable level
+ *
+ *  @note This is a rare routine in RTEMS.  It is called with
+ *        interrupts disabled and only when an ISR completed
+ *        a blocking condition in process.
+ */
+void _Thread_blocking_operation_Cancel(
+  Thread_blocking_operation_States  sync_state,
+  Thread_Control                   *the_thread,
+  ISR_Level                         level
+);
+
 #ifndef __RTEMS_APPLICATION__
 #include <rtems/score/thread.inl>
 #endif