Changeset f57f8ea in mainline for uspace/srv/vfs/vfs.h

Timestamp:

2008-01-02T20:25:24Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

9413c0d

Parents:

215e375

Message:

Rename unlink_futex to namespace_futex and introduce a new futex for serializing
concurrent access to a VFS node's contents by multiple clients.

File:

• uspace/srv/vfs/vfs.h (modified) (2 diffs)

uspace/srv/vfs/vfs.h

@@ -135 +135 @@
         unsigned refcnt;        /**< Usage counter. */
         link_t nh_link;         /**< Node hash-table link. */
+
+        /** Holding this futex prevents modifications of the node's contents. */
+        atomic_t contents_futex;
 } vfs_node_t;
 
@@ -170 +173 @@
 extern link_t plb_head;         /**< List of active PLB entries. */
 
-extern atomic_t unlink_futex;   /**< VFS_{CREATE|OPEN|UNLINK} serialization. */
+/** Holding this futex prevents extern changes in file system namespace. */ 
+atomic_t namespace_futex;
 
 extern int vfs_grab_phone(int);