Changeset 9413c0d in mainline for uspace/srv/vfs/vfs.h

Timestamp:

2008-01-06T12:50:51Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

b3c38750

Parents:

f57f8ea

Message:

Add basic rwlock API for uspace so that VFS can be designed/implemented using
this API. So far, the implementation of this API merely wraps futexes into
rwlocks. Real rwlocks are wanted by ticket #54.

Using the new rwlock API, replace the VFS node content futex with an rwlock.
Lock the contents rwlock as reader on reads and as writer on writes.

File:

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

uspace/srv/vfs/vfs.h

@@ -37 +37 @@
 #include <libadt/list.h>
 #include <atomic.h>
+#include <rwlock.h>
 #include <sys/types.h>
 #include <bool.h>
@@ -136 +137 @@
         link_t nh_link;         /**< Node hash-table link. */
 
-        /** Holding this futex prevents modifications of the node's contents. */
-        atomic_t contents_futex;
+        /** Holding this rwlock prevents modifications of the node's contents. */
+        atomic_t contents_rwlock;
 } vfs_node_t;