Changeset 252dea2f in rtems

Timestamp:

Sep 5, 2008, 9:33:41 PM (11 years ago)

Author:

Joel Sherrill <joel.sherrill@…>

Branches:

4.10, 4.11, 4.9, master

Children:

f2b169a

Parents:

538583f

Message:

2008-09-05 Joel Sherrill <joel.sherrill@…>

• shmsupp/lock.c: Disable CPU interrupts when we have the shared memory locked. This is necessary to prevent deadlock.

Location:

c/src/lib/libbsp/powerpc/psim

Files:

• ChangeLog (modified) (1 diff)
• shmsupp/lock.c (modified) (2 diffs)

c/src/lib/libbsp/powerpc/psim/ChangeLog

@@ +1 @@
+2008-09-05      Joel Sherrill <joel.sherrill@oarcorp.com>
+
+        * shmsupp/lock.c: Disable CPU interrupts when we have the shared memory
+        locked. This is necessary to prevent deadlock.
+
 2008-09-05      Joel Sherrill <joel.sherrill@oarcorp.com>
 

c/src/lib/libbsp/powerpc/psim/shmsupp/lock.c

@@ -42 +42 @@
  */
 
+static rtems_interrupt_level level;
+
 void Shm_Lock(
   Shm_Locked_queue_Control *lq_cb
 )
 {
-  (void) PSIM.Semaphore.lock;
+  rtems_interrupt_disable( level );
+    (void) PSIM.Semaphore.lock;
 }
 
@@ -59 +62 @@
 )
 {
-  (void) PSIM.Semaphore.unlock;
+    (void) PSIM.Semaphore.unlock;
+  rtems_interrupt_enable( level );
 }