Name
eventfd_ctx_remove_wait_queue —
Read the current counter and removes wait queue.
Synopsis
int eventfd_ctx_remove_wait_queue ( | struct eventfd_ctx * ctx, |
| | wait_queue_t * wait, |
| | __u64 * cnt); |
Arguments
struct eventfd_ctx * ctx
[in] Pointer to eventfd context.
wait_queue_t * wait
[in] Wait queue to be removed.
__u64 * cnt
[out] Pointer to the 64-bit counter value.
Description
Returns 0 if successful, or the following error codes:
-EAGAIN : The operation would have blocked.
This is used to atomically remove a wait queue entry from the eventfd wait
queue head, and read/reset the counter value.