Changeset 45c8eea in mainline for uspace/lib/c/generic/thread/futex.c

Timestamp:

2018-11-11T15:47:39Z (7 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

f4cb6c5f

Parents:

269bc459

git-author:

Jakub Jermar <jakub@…> (2018-11-10 17:49:44)

git-committer:

Jakub Jermar <jakub@…> (2018-11-11 15:47:39)

Message:

Preallocate waitq handle during initialization

Do not clutter futex_down_composable() with the preallocation of the
wait queue handle and do it single-threadedly in futex_initialize().

File:

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

uspace/lib/c/generic/thread/futex.c

@@ -49 +49 @@
  * @param val   Initialization value.
  *
+ * @return      Error code.
  */
-void futex_initialize(futex_t *futex, int val)
+errno_t futex_initialize(futex_t *futex, int val)
 {
         atomic_store_explicit(&futex->val, val, memory_order_relaxed);
-        atomic_store_explicit(&futex->lock, 0, memory_order_relaxed);
         futex->whandle = CAP_NIL;
+        return futex_allocate_waitq(futex);
 }