Changeset c3d9aaf5 in mainline for uspace/srv/devman/dev.c

Timestamp:

2025-02-03T15:52:08Z (19 hours ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

master

Children:

b1490d2

Parents:

a796812c

Message:

Determine when device (sub)tree is stable.

Devman will only return value when the entire device tree is stable.

File:

• uspace/srv/devman/dev.c (modified) (3 diffs)

uspace/srv/devman/dev.c

@@ -1 +1 @@
 /*
+ * Copyright (c) 2025 Jiri Svoboda
  * Copyright (c) 2010 Lenka Trochtova
  * All rights reserved.
@@ -50 +51 @@
         refcount_init(&dev->refcnt);
         list_initialize(&dev->functions);
+        fibril_mutex_initialize(&dev->state_lock);
+        fibril_condvar_initialize(&dev->state_cv);
         link_initialize(&dev->driver_devices);
 
@@ -87 +90 @@
         if (refcount_down(&dev->refcnt))
                 delete_dev_node(dev);
+}
+
+/** Wait until the device node enters stable state.
+ *
+ * @param dev Device node
+ */
+void dev_wait_stable(dev_node_t *dev)
+{
+        fibril_mutex_lock(&dev->state_lock);
+        while (dev->state == DEVICE_ATTACHING)
+                fibril_condvar_wait(&dev->state_cv, &dev->state_lock);
+        fibril_mutex_unlock(&dev->state_lock);
 }