Changeset 4fded58 in mainline for generic/include

Timestamp:

2006-05-31T12:33:30Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

76d7305

Parents:

3de6dd7a

Message:

Reference counting for futexes.

Location:

generic/include

Files:

• proc/task.h (modified) (2 diffs)
• synch/futex.h (modified) (1 diff)

generic/include/proc/task.h

@@ -32 +32 @@
 #include <typedefs.h>
 #include <synch/spinlock.h>
+#include <synch/mutex.h>
 #include <adt/btree.h>
 #include <adt/list.h>
@@ -54 +55 @@
         
         task_arch_t arch;       /**< Architecture specific task data. */
+        
+        /**
+          * Serializes access to the B+tree of task's futexes. This mutex is
+          * independent on the task spinlock.
+          */
+        mutex_t futexes_lock;
+        btree_t futexes;        /**< B+tree of futexes referenced by this task. */
 };
 

generic/include/synch/futex.h

@@ -41 +41 @@
         waitq_t wq;             /**< Wait queue for threads waiting for futex availability. */
         link_t ht_link;         /**< Futex hash table link. */
+        count_t refcount;       /**< Number of tasks that reference this futex. */
 };