Changeset a3eeceb6 in mainline for generic/src/proc/scheduler.c

Timestamp:

2006-02-09T23:29:57Z (19 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

d0a0f12

Parents:

8f00329

Message:

Unimportant changes regarding FPU context.

File:

• generic/src/proc/scheduler.c (modified) (3 diffs)

generic/src/proc/scheduler.c

@@ -56 +56 @@
  * tread is passed control.
  *
+ * THREAD->lock is locked on entry
+ *
  */
 void before_thread_runs(void)
@@ -70 +72 @@
                 fpu_context_restore(&(THREAD->saved_fpu_context));
         else {
-                fpu_init();
+                fpu_init(&(THREAD->saved_fpu_context));
                 THREAD->fpu_context_exists=1;
         }
@@ -80 +82 @@
 {
         fpu_enable();
+        spinlock_lock(&CPU->lock);
+
+        /* Save old context */
         if (CPU->fpu_owner != NULL) {  
+                spinlock_lock(&CPU->fpu_owner->lock);
                 fpu_context_save(&CPU->fpu_owner->saved_fpu_context);
                 /* don't prevent migration */
                 CPU->fpu_owner->fpu_context_engaged=0; 
-        }
+                spinlock_unlock(&CPU->fpu_owner->lock);
+        }
+
+        spinlock_lock(&THREAD->lock);
         if (THREAD->fpu_context_exists)
                 fpu_context_restore(&THREAD->saved_fpu_context);
         else {
-                fpu_init();
+                fpu_init(&(THREAD->saved_fpu_context));
                 THREAD->fpu_context_exists=1;
         }
         CPU->fpu_owner=THREAD;
         THREAD->fpu_context_engaged = 1;
+
+        spinlock_unlock(&THREAD->lock);
+        spinlock_unlock(&CPU->lock);
 }
 #endif