diff options
Diffstat (limited to 'include/linux/wait.h')
| -rw-r--r-- | include/linux/wait.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/include/linux/wait.h b/include/linux/wait.h index 52edb1786b14a..4a9f996bb6cce 100644 --- a/include/linux/wait.h +++ b/include/linux/wait.h @@ -200,7 +200,36 @@ do { \ __wait_event_interruptible_timeout(wq, condition, __ret); \ __ret; \ }) - + +#define __wait_event_interruptible_exclusive(wq, condition, ret) \ +do { \ + wait_queue_t __wait; \ + init_waitqueue_entry(&__wait, current); \ + \ + add_wait_queue_exclusive(&wq, &__wait); \ + for (;;) { \ + set_current_state(TASK_INTERRUPTIBLE); \ + if (condition) \ + break; \ + if (!signal_pending(current)) { \ + schedule(); \ + continue; \ + } \ + ret = -ERESTARTSYS; \ + break; \ + } \ + current->state = TASK_RUNNING; \ + remove_wait_queue(&wq, &__wait); \ +} while (0) + +#define wait_event_interruptible_exclusive(wq, condition) \ +({ \ + int __ret = 0; \ + if (!(condition)) \ + __wait_event_interruptible_exclusive(wq, condition, __ret);\ + __ret; \ +}) + /* * Must be called with the spinlock in the wait_queue_head_t held. */ |