mirror of
https://github.com/warmcat/libwebsockets.git
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135 lines
4.1 KiB
C
135 lines
4.1 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <private-lib-core.h>
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static int
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rops_handle_POLLIN_pipe(struct lws_context_per_thread *pt, struct lws *wsi,
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struct lws_pollfd *pollfd)
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{
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#if defined(LWS_HAVE_EVENTFD)
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eventfd_t value;
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int n;
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n = eventfd_read(wsi->desc.sockfd, &value);
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if (n < 0) {
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lwsl_notice("%s: eventfd read %d bailed errno %d\n", __func__,
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wsi->desc.sockfd, LWS_ERRNO);
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return LWS_HPI_RET_PLEASE_CLOSE_ME;
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}
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#elif !defined(WIN32) && !defined(_WIN32)
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char s[100];
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int n;
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/*
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* discard the byte(s) that signaled us
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* We really don't care about the number of bytes, but coverity
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* thinks we should.
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*/
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n = read(wsi->desc.sockfd, s, sizeof(s));
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(void)n;
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if (n < 0)
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return LWS_HPI_RET_PLEASE_CLOSE_ME;
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#endif
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#if defined(LWS_WITH_THREADPOOL)
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/*
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* threadpools that need to call for on_writable callbacks do it by
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* marking the task as needing one for its wsi, then cancelling service.
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*
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* Each tsi will call this to perform the actual callback_on_writable
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* from the correct service thread context
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*/
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lws_threadpool_tsi_context(pt->context, pt->tid);
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#endif
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#if LWS_MAX_SMP > 1
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/*
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* Other pts need to take care of their own wsi bound to a vhost that
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* is going down
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*/
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if (pt->context->owner_vh_being_destroyed.head) {
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lws_start_foreach_dll_safe(struct lws_dll2 *, d, d1,
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pt->context->owner_vh_being_destroyed.head) {
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struct lws_vhost *v =
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lws_container_of(d, struct lws_vhost,
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vh_being_destroyed_list);
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lws_vhost_lock(v); /* -------------- vh { */
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__lws_vhost_destroy_pt_wsi_dieback_start(v);
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lws_vhost_unlock(v); /* } vh -------------- */
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} lws_end_foreach_dll_safe(d, d1);
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}
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#endif
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/*
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* the poll() wait, or the event loop for libuv etc is a
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* process-wide resource that we interrupted. So let every
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* protocol that may be interested in the pipe event know that
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* it happened.
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*/
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if (lws_broadcast(pt, LWS_CALLBACK_EVENT_WAIT_CANCELLED, NULL, 0)) {
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lwsl_info("closed in event cancel\n");
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return LWS_HPI_RET_PLEASE_CLOSE_ME;
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}
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return LWS_HPI_RET_HANDLED;
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}
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const struct lws_role_ops role_ops_pipe = {
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/* role name */ "pipe",
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/* alpn id */ NULL,
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/* check_upgrades */ NULL,
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/* pt_init_destroy */ NULL,
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/* init_vhost */ NULL,
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/* destroy_vhost */ NULL,
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/* service_flag_pending */ NULL,
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/* handle_POLLIN */ rops_handle_POLLIN_pipe,
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/* handle_POLLOUT */ NULL,
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/* perform_user_POLLOUT */ NULL,
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/* callback_on_writable */ NULL,
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/* tx_credit */ NULL,
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/* write_role_protocol */ NULL,
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/* encapsulation_parent */ NULL,
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/* alpn_negotiated */ NULL,
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/* close_via_role_protocol */ NULL,
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/* close_role */ NULL,
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/* close_kill_connection */ NULL,
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/* destroy_role */ NULL,
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/* adoption_bind */ NULL,
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/* client_bind */ NULL,
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/* issue_keepalive */ NULL,
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/* adoption_cb clnt, srv */ { 0, 0 },
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/* rx_cb clnt, srv */ { 0, 0 },
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/* writeable cb clnt, srv */ { 0, 0 },
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/* close cb clnt, srv */ { 0, 0 },
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/* protocol_bind_cb c,s */ { 0, 0 },
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/* protocol_unbind_cb c,s */ { 0, 0 },
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/* file_handle */ 1,
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};
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