Changeset 3679f51a in mainline for uspace/lib/c/generic/futex.c

Timestamp:

2018-06-25T20:41:09Z (7 years ago)

Author:

Jiří Zárevúcky <jiri.zarevucky@…>

Branches:

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

Children:

95838f1

Parents:

d73d992

git-author:

Jiří Zárevúcky <jiri.zarevucky@…> (2018-06-25 20:30:35)

git-committer:

Jiří Zárevúcky <jiri.zarevucky@…> (2018-06-25 20:41:09)

Message:

Remove the option of RCU-upgradable futexes for now.
They complicate threading design too much.

File:

• uspace/lib/c/generic/futex.c (modified) (1 diff)

uspace/lib/c/generic/futex.c

@@ -47 +47 @@
 }
 
-
-#ifdef FUTEX_UPGRADABLE
-
-int _upgrade_futexes = 0;
-static futex_t upg_and_wait_futex = FUTEX_INITIALIZER;
-
-void futex_upgrade_all_and_wait(void)
-{
-        futex_down(&upg_and_wait_futex);
-
-        if (!_upgrade_futexes) {
-                rcu_assign(_upgrade_futexes, 1);
-                _rcu_synchronize(BM_BLOCK_THREAD);
-        }
-
-        futex_up(&upg_and_wait_futex);
-}
-
-#endif
-
 /** @}
  */