WebSVN – HelenOS – Diff – /branches/sparc/kernel/generic/src/ipc/kbox.c

 void ipc_kbox_cleanup(void)
+{
     ipl_t ipl;
     bool have_kb_thread;
+    /*
-    /* Only hold kb_cleanup_lock while setting kb_finished - this is enough */
+     * Only hold kb.cleanup_lock while setting kb.finished -
+     * this is enough.
+     */
-    mutex_lock(&TASK->kb_cleanup_lock);
+    mutex_lock(&TASK->kb.cleanup_lock);
-    TASK->kb_finished = true;
+    TASK->kb.finished = true;
-    mutex_unlock(&TASK->kb_cleanup_lock);
+    mutex_unlock(&TASK->kb.cleanup_lock);
-    have_kb_thread = (TASK->kb_thread != NULL);
+    have_kb_thread = (TASK->kb.thread != NULL);
+    /*
-    /* From now on nobody will try to connect phones or attach kbox threads */
+     * From now on nobody will try to connect phones or attach
+     * kbox threads
+     */
     /*
      * Disconnect all phones connected to our kbox. Passing true for
      * notify_box causes a HANGUP message to be inserted for each
      * disconnected phone. This ensures the kbox thread is going to
      * wake up and terminate.
      */
-    ipc_answerbox_slam_phones(&TASK->kernel_box, have_kb_thread);
+    ipc_answerbox_slam_phones(&TASK->kb.box, have_kb_thread);
     /*
      * If the task was being debugged, clean up debugging session.
      * This is necessarry as slamming the phones won't force
      * kbox thread to clean it up since sender != debugger.
     udebug_task_cleanup(TASK);
     spinlock_unlock(&TASK->lock);
     interrupts_restore(ipl);
     if (have_kb_thread) {
-        LOG("join kb_thread..\n");
+        LOG("join kb.thread..\n");
-        thread_join(TASK->kb_thread);
+        thread_join(TASK->kb.thread);
-        thread_detach(TASK->kb_thread);
+        thread_detach(TASK->kb.thread);
         LOG("join done\n");
-        TASK->kb_thread = NULL;
+        TASK->kb.thread = NULL;
+    }
-    /* Answer all messages in 'calls' and 'dispatched_calls' queues */
+    /* Answer all messages in 'calls' and 'dispatched_calls' queues. */
-    spinlock_lock(&TASK->kernel_box.lock);
+    spinlock_lock(&TASK->kb.box.lock);
-    ipc_cleanup_call_list(&TASK->kernel_box.dispatched_calls);
+    ipc_cleanup_call_list(&TASK->kb.box.dispatched_calls);
-    ipc_cleanup_call_list(&TASK->kernel_box.calls);
+    ipc_cleanup_call_list(&TASK->kb.box.calls);
-    spinlock_unlock(&TASK->kernel_box.lock);
+    spinlock_unlock(&TASK->kb.box.lock);
+}
 /** Handle hangup message in kbox.
+ *
  * @param call  The IPC_M_PHONE_HUNGUP call structure.
     LOG("kbox_proc_phone_hungup()\n");
     /* Was it our debugger, who hung up? */
     if (call->sender == TASK->udebug.debugger) {
-        /* Terminate debugging session (if any) */
+        /* Terminate debugging session (if any). */
         LOG("kbox: terminate debug session\n");
         ipl = interrupts_disable();
         spinlock_lock(&TASK->lock);
         udebug_task_cleanup(TASK);
         spinlock_unlock(&TASK->lock);
         LOG("kbox: was not debugger\n");
+    }
     LOG("kbox: continue with hangup message\n");
     IPC_SET_RETVAL(call->data, 0);
-    ipc_answer(&TASK->kernel_box, call);
+    ipc_answer(&TASK->kb.box, call);
     ipl = interrupts_disable();
     spinlock_lock(&TASK->lock);
     spinlock_lock(&TASK->answerbox.lock);
     if (list_empty(&TASK->answerbox.connected_phones)) {
          * Last phone has been disconnected. Detach this thread so it
          * gets freed and signal to the caller.
          */
         /* Only detach kbox thread unless already terminating. */
-        mutex_lock(&TASK->kb_cleanup_lock);
+        mutex_lock(&TASK->kb.cleanup_lock);
-        if (&TASK->kb_finished == false) {
+        if (&TASK->kb.finished == false) {
             /* Detach kbox thread so it gets freed from memory. */
-            thread_detach(TASK->kb_thread);
+            thread_detach(TASK->kb.thread);
-            TASK->kb_thread = NULL;
+            TASK->kb.thread = NULL;
+        }
-        mutex_unlock(&TASK->kb_cleanup_lock);
+        mutex_unlock(&TASK->kb.cleanup_lock);
         LOG("phone list is empty\n");
         *last = true;
     } else {
         *last = false;
     (void)arg;
     LOG("kbox_thread_proc()\n");
     done = false;
     while (!done) {
-        call = ipc_wait_for_call(&TASK->kernel_box, SYNCH_NO_TIMEOUT,
+        call = ipc_wait_for_call(&TASK->kb.box, SYNCH_NO_TIMEOUT,
             SYNCH_FLAGS_NONE);
         if (call == NULL)
             continue;   /* Try again. */
 /**
  * Connect phone to a task kernel-box specified by id.
+ *
- * Note that this is not completely atomic. For optimisation reasons,
+ * Note that this is not completely atomic. For optimisation reasons, the task
- * The task might start cleaning up kbox after the phone has been connected
+ * might start cleaning up kbox after the phone has been connected and before
- * and before a kbox thread has been created. This must be taken into account
+ * a kbox thread has been created. This must be taken into account in the
- * in the cleanup code.
+ * cleanup code.
+ *
  * @return      Phone id on success, or negative error code.
  */
 int ipc_connect_kbox(task_id_t taskid)
+{
     atomic_inc(&ta->refcount);
     spinlock_unlock(&tasks_lock);
     interrupts_restore(ipl);
-    mutex_lock(&ta->kb_cleanup_lock);
+    mutex_lock(&ta->kb.cleanup_lock);
     if (atomic_predec(&ta->refcount) == 0) {
-        mutex_unlock(&ta->kb_cleanup_lock);
+        mutex_unlock(&ta->kb.cleanup_lock);
         task_destroy(ta);
         return ENOENT;
+    }
-    if (ta->kb_finished != false) {
+    if (ta->kb.finished != false) {
-        mutex_unlock(&ta->kb_cleanup_lock);
+        mutex_unlock(&ta->kb.cleanup_lock);
         return EINVAL;
+    }
     newphid = phone_alloc();
     if (newphid < 0) {
-        mutex_unlock(&ta->kb_cleanup_lock);
+        mutex_unlock(&ta->kb.cleanup_lock);
         return ELIMIT;
+    }
     /* Connect the newly allocated phone to the kbox */
-    ipc_phone_connect(&TASK->phones[newphid], &ta->kernel_box);
+    ipc_phone_connect(&TASK->phones[newphid], &ta->kb.box);
-    if (ta->kb_thread != NULL) {
+    if (ta->kb.thread != NULL) {
-        mutex_unlock(&ta->kb_cleanup_lock);
+        mutex_unlock(&ta->kb.cleanup_lock);
         return newphid;
+    }
     /* Create a kbox thread */
-    kb_thread = thread_create(kbox_thread_proc, NULL, ta, 0, "kbox", false);
+    kb_thread = thread_create(kbox_thread_proc, NULL, ta, 0,
+        "kbox", false);
     if (!kb_thread) {
-        mutex_unlock(&ta->kb_cleanup_lock);
+        mutex_unlock(&ta->kb.cleanup_lock);
         return ENOMEM;
+    }
-    ta->kb_thread = kb_thread;
+    ta->kb.thread = kb_thread;
     thread_ready(kb_thread);
-    mutex_unlock(&ta->kb_cleanup_lock);
+    mutex_unlock(&ta->kb.cleanup_lock);
     return newphid;
+}
 /** @}

Subversion Repositories HelenOS

(root)/branches/sparc/kernel/generic/src/ipc/kbox.c – Rev 3593 → 3665