Changeset 2bb8648 in mainline for generic/src/ddi/ddi.c

Timestamp:

2006-05-07T15:21:11Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

31282f9

Parents:

ecf3722

Message:

Add SYS_CAP_GRANT and SYS_CAP_REVOKE syscalls.
Move SYS_PREEMPT_CONTROL to ddi.c.
Add some comments and fix some small issues.

File:

• generic/src/ddi/ddi.c (modified) (1 diff)

generic/src/ddi/ddi.c

@@ -212 +212 @@
         return (__native) ddi_iospace_enable((task_id_t) arg.task_id, (__address) arg.ioaddr, (size_t) arg.size);
 }
+
+/** Disable or enable preemption.
+ *
+ * @param enable If non-zero, the preemption counter will be decremented, leading to potential
+ *               enabling of preemption. Otherwise the preemption counter will be incremented,
+ *               preventing preemption from occurring.
+ *
+ * @return Zero on success or EPERM if callers capabilities are not sufficient.
+ */ 
+__native sys_preempt_control(int enable)
+{
+        if (! cap_get(TASK) & CAP_PREEMPT_CONTROL)
+                return EPERM;
+        if (enable)
+                preemption_enable();
+        else
+                preemption_disable();
+        return 0;
+}