diff options
Diffstat (limited to 'ev_kqueue.c')
-rw-r--r-- | ev_kqueue.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/ev_kqueue.c b/ev_kqueue.c index bc4ac48..9faf65a 100644 --- a/ev_kqueue.c +++ b/ev_kqueue.c @@ -155,7 +155,8 @@ kqueue_poll (EV_P_ ev_tstamp timeout) int inline_size kqueue_init (EV_P_ int flags) { - /* Initialize the kernel queue */ + /* initialize the kernel queue */ + kqueue_fd_pid = getpid (); if ((backend_fd = kqueue ()) < 0) return 0; @@ -185,8 +186,20 @@ kqueue_destroy (EV_P) void inline_size kqueue_fork (EV_P) { - close (backend_fd); - + /* some BSD kernels don't just destroy the kqueue itself, + * but also close the fd, which isn't documented, and + * impossible to support properly. + * we remember the pid of the kqueue call and only close + * the fd if the pid is still the same. + * this leaks fds on sane kernels, but BSD interfaces are + * notoriously buggy and rarely get fixed. + */ + pid_t newpid = getpid (); + + if (newpid == kqueue_fd_pid) + close (backend_fd); + + kqueue_fd_pid = newpid; while ((backend_fd = kqueue ()) < 0) ev_syserr ("(libev) kqueue"); |