Changeset 95ad426 in mainline

Timestamp:

2009-06-02T17:28:10Z (15 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

1ed901d

Parents:

34356b2

Message:

add very simple implementation of task destruction notification
(which will be later used for waiting on a task)

Location:

kernel/generic

Files:

• include/ipc/event_types.h (modified) (1 diff)
• include/macros.h (modified) (1 diff)
• src/proc/task.c (modified) (2 diffs)

kernel/generic/include/ipc/event_types.h

@@ -39 +39 @@
         EVENT_KLOG = 0,
         EVENT_KCONSOLE,
+        EVENT_WAIT,
         EVENT_END
 } event_type_t;

kernel/generic/include/macros.h

@@ -84 +84 @@
 #define STRING_ARG(arg)  #arg
 
+#define LOWER32(arg)  ((arg) & 0xffffffff)
+#define UPPER32(arg)  (((arg) >> 32) & 0xffffffff)
+
+#define MERGE_LOHI32(lo, hi)  ((lo & 0xffffffff) | ((hi & 0xffffffff) < 32))
+
 /** Pseudorandom generator
  *

kernel/generic/src/proc/task.c

@@ -55 +55 @@
 #include <string.h>
 #include <syscall/copy.h>
+#include <macros.h>
+#include <ipc/event.h>
 
 /** Spinlock protecting the tasks_tree AVL tree. */
@@ -230 +232 @@
                 as_destroy(t->as);
         
+        /*
+         * Notify about task destruction.
+         */
+        if (event_is_subscribed(EVENT_WAIT))
+                event_notify_2(EVENT_WAIT, LOWER32(t->taskid), UPPER32(t->taskid));
+        
         free(t);
         TASK = NULL;