diff options
| -rw-r--r-- | lib/libc/sys/kqueue.2 | 5 | ||||
| -rw-r--r-- | sys/kern/kern_event.c | 6 | ||||
| -rw-r--r-- | sys/sys/event.h | 2 |
3 files changed, 11 insertions, 2 deletions
diff --git a/lib/libc/sys/kqueue.2 b/lib/libc/sys/kqueue.2 index 1e5e2b5..63f5a4d 100644 --- a/lib/libc/sys/kqueue.2 +++ b/lib/libc/sys/kqueue.2 @@ -201,6 +201,11 @@ Disable the event so .Fn kevent will not return it. The filter itself is not disabled. +.It EV_DISPATCH +Disable the event source immediately after delivery of an event. +See +.Dv EV_DISABLE +above. .It EV_DELETE Removes the event from the kqueue. Events which are attached to diff --git a/sys/kern/kern_event.c b/sys/kern/kern_event.c index 92afec2..2630894 100644 --- a/sys/kern/kern_event.c +++ b/sys/kern/kern_event.c @@ -1445,15 +1445,17 @@ start: *kevp = kn->kn_kevent; KQ_LOCK(kq); KQ_GLOBAL_UNLOCK(&kq_global, haskqglobal); - if (kn->kn_flags & EV_CLEAR) { + if (kn->kn_flags & (EV_CLEAR | EV_DISPATCH)) { /* * Manually clear knotes who weren't * 'touch'ed. */ - if (touch == 0) { + if (touch == 0 && kn->kn_flags & EV_CLEAR) { kn->kn_data = 0; kn->kn_fflags = 0; } + if (kn->kn_flags & EV_DISPATCH) + kn->kn_status |= KN_DISABLED; kn->kn_status &= ~(KN_QUEUED | KN_ACTIVE); kq->kq_count--; } else diff --git a/sys/sys/event.h b/sys/sys/event.h index eb0fefd..2934b7b 100644 --- a/sys/sys/event.h +++ b/sys/sys/event.h @@ -72,6 +72,8 @@ struct kevent { /* flags */ #define EV_ONESHOT 0x0010 /* only report one occurrence */ #define EV_CLEAR 0x0020 /* clear event state after reporting */ + /* 0x0040 reserved for EV_RECEIPT */ +#define EV_DISPATCH 0x0080 /* disable event after reporting */ #define EV_SYSFLAGS 0xF000 /* reserved by system */ #define EV_FLAG1 0x2000 /* filter-specific flag */ |
