From 1d033484ee1a2ec26d3eead073e7bc0f889ffdf4 Mon Sep 17 00:00:00 2001 From: Garrett D'Amore Date: Tue, 15 May 2018 01:47:12 -0700 Subject: fixes #419 want to nni_aio_stop without blocking (#428) * fixes #419 want to nni_aio_stop without blocking This actually introduces an nni_aio_close() API that causes nni_aio_begin to return NNG_ECLOSED, while scheduling a callback on the AIO to do an NNG_ECLOSED as well. This should be called in non-blocking close() contexts instead of nni_aio_stop(), and the cases where we call nni_aio_fini() multiple times are updated updated to add nni_aio_stop() calls on all "interlinked" aios before finalizing them. Furthermore, we call nni_aio_close() as soon as practical in the close path. This closes an annoying race condition where the callback from a lower subsystem could wind up rescheduling an operation that we wanted to abort. --- src/protocol/survey0/xrespond.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) (limited to 'src/protocol/survey0/xrespond.c') diff --git a/src/protocol/survey0/xrespond.c b/src/protocol/survey0/xrespond.c index 7aaed6da..bcbbcbc7 100644 --- a/src/protocol/survey0/xrespond.c +++ b/src/protocol/survey0/xrespond.c @@ -63,7 +63,6 @@ xresp0_sock_fini(void *arg) { xresp0_sock *s = arg; - nni_aio_stop(s->aio_getq); nni_aio_fini(s->aio_getq); nni_idhash_fini(s->pipes); nni_mtx_fini(&s->mtx); @@ -107,7 +106,18 @@ xresp0_sock_close(void *arg) { xresp0_sock *s = arg; - nni_aio_abort(s->aio_getq, NNG_ECLOSED); + nni_aio_close(s->aio_getq); +} + +static void +xresp0_pipe_stop(void *arg) +{ + xresp0_pipe *p = arg; + + nni_aio_stop(p->aio_putq); + nni_aio_stop(p->aio_getq); + nni_aio_stop(p->aio_send); + nni_aio_stop(p->aio_recv); } static void @@ -170,16 +180,17 @@ xresp0_pipe_start(void *arg) } static void -xresp0_pipe_stop(void *arg) +xresp0_pipe_close(void *arg) { xresp0_pipe *p = arg; xresp0_sock *s = p->psock; + nni_aio_close(p->aio_putq); + nni_aio_close(p->aio_getq); + nni_aio_close(p->aio_send); + nni_aio_close(p->aio_recv); + nni_msgq_close(p->sendq); - nni_aio_stop(p->aio_putq); - nni_aio_stop(p->aio_getq); - nni_aio_stop(p->aio_send); - nni_aio_stop(p->aio_recv); nni_mtx_lock(&s->mtx); nni_idhash_remove(s->pipes, p->id); @@ -366,6 +377,7 @@ static nni_proto_pipe_ops xresp0_pipe_ops = { .pipe_init = xresp0_pipe_init, .pipe_fini = xresp0_pipe_fini, .pipe_start = xresp0_pipe_start, + .pipe_close = xresp0_pipe_close, .pipe_stop = xresp0_pipe_stop, }; -- cgit v1.2.3-70-g09d2