Changeset e1b6742 in mainline for kernel/generic/src/proc/thread.c

Timestamp:

2010-04-18T12:17:11Z (14 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

e535eeb

Parents:

bbda5ab

Message:

export threads to user space
the "tasks" command can now print all threads or threads belonging to a task

File:

• kernel/generic/src/proc/thread.c (modified) (2 diffs)

kernel/generic/src/proc/thread.c

@@ -84 +84 @@
         "Exiting",
         "Lingering"
-}; 
+};
+
+typedef struct {
+        thread_id_t thread_id;
+        thread_t *thread;
+} thread_iterator_t;
 
 /** Lock protecting the threads_tree AVL tree.
@@ -726 +731 @@
         THREAD->last_cycle = time;
 }
+
+static bool thread_search_walker(avltree_node_t *node, void *arg)
+{
+        thread_t *thread =
+            (thread_t *) avltree_get_instance(node, thread_t, threads_tree_node);
+        thread_iterator_t *iterator = (thread_iterator_t *) arg;
+        
+        if (thread->tid == iterator->thread_id) {
+                iterator->thread = thread;
+                return false;
+        }
+        
+        return true;
+}
+
+/** Find thread structure corresponding to thread ID.
+ *
+ * The threads_lock must be already held by the caller of this function and
+ * interrupts must be disabled.
+ *
+ * @param id Thread ID.
+ *
+ * @return Thread structure address or NULL if there is no such thread ID.
+ *
+ */
+thread_t *thread_find_by_id(thread_id_t thread_id)
+{
+        thread_iterator_t iterator;
+        
+        iterator.thread_id = thread_id;
+        iterator.thread = NULL;
+        
+        avltree_walk(&threads_tree, thread_search_walker, (void *) &iterator);
+        
+        return iterator.thread;
+}
+
 
 /** Process syscall to create new thread.