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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010 - 2021 Andy Green <andy@warmcat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef _WINSOCK_DEPRECATED_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#endif
#include "private-lib-core.h"
int
_lws_plat_service_forced_tsi(struct lws_context *context, int tsi)
{
struct lws_context_per_thread *pt = &context->pt[tsi];
int m, n, r;
r = lws_service_flag_pending(context, tsi);
/* any socket with events to service? */
for (n = 0; n < (int)pt->fds_count; n++) {
if (!pt->fds[n].revents)
continue;
m = lws_service_fd_tsi(context, &pt->fds[n], tsi);
if (m < 0)
return -1;
/* if something closed, retry this slot */
if (m)
n--;
}
lws_service_do_ripe_rxflow(pt);
return r;
}
extern void lws_client_conn_wait_timeout(lws_sorted_usec_list_t *sul);
int
_lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
{
struct lws_context_per_thread *pt;
struct lws_pollfd *pfd;
lws_usec_t timeout_us;
struct lws *wsi;
unsigned int i;
int n;
/* stay dead once we are dead */
if (context == NULL)
return 1;
pt = &context->pt[tsi];
if (!pt->service_tid_detected && context->vhost_list) {
lws_fakewsi_def_plwsa(pt);
lws_fakewsi_prep_plwsa_ctx(context);
pt->service_tid = context->vhost_list->
protocols[0].callback((struct lws *)plwsa,
LWS_CALLBACK_GET_THREAD_ID,
NULL, NULL, 0);
pt->service_tid_detected = 1;
}
if (timeout_ms < 0)
timeout_ms = 0;
else
/* force a default timeout of 23 days */
timeout_ms = 2000000000;
timeout_us = ((lws_usec_t)timeout_ms) * LWS_US_PER_MS;
if (context->event_loop_ops->run_pt)
context->event_loop_ops->run_pt(context, tsi);
for (i = 0; i < pt->fds_count; ++i) {
pfd = &pt->fds[i];
if (!(pfd->events & LWS_POLLOUT))
continue;
wsi = wsi_from_fd(context, pfd->fd);
if (!wsi || wsi->listener)
continue;
if (wsi->sock_send_blocking)
continue;
pfd->revents = LWS_POLLOUT;
n = lws_service_fd(context, pfd);
if (n < 0)
return -1;
/*
* Force WSAWaitForMultipleEvents() to check events
* and then return immediately.
*/
timeout_us = 0;
/* if something closed, retry this slot */
if (n)
i--;
}
/*
* service pending callbacks and get maximum wait time
*/
{
lws_usec_t us;
lws_pt_lock(pt, __func__);
/* don't stay in poll wait longer than next hr timeout */
us = __lws_sul_service_ripe(pt->pt_sul_owner,
LWS_COUNT_PT_SUL_OWNERS,
lws_now_usecs());
if (us && us < timeout_us)
/*
* If something wants zero wait, that's OK, but if the next sul
* coming ripe is an interval less than our wait resolution,
* bump it to be the wait resolution.
*/
timeout_us = us < context->us_wait_resolution ?
context->us_wait_resolution : us;
lws_pt_unlock(pt);
}
if (_lws_plat_service_forced_tsi(context, tsi))
timeout_us = 0;
/*
* is there anybody with pending stuff that needs service forcing?
*/
if (!lws_service_adjust_timeout(context, 1, tsi))
timeout_us = 0;
// lwsl_notice("%s: in %dms, count %d\n", __func__, (int)(timeout_us / 1000), pt->fds_count);
// for (n = 0; n < (int)pt->fds_count; n++)
// lwsl_notice("%s: fd %d ev 0x%x POLLIN %d, POLLOUT %d\n", __func__, (int)pt->fds[n].fd, (int)pt->fds[n].events, POLLIN, POLLOUT);
int d = WSAPoll((WSAPOLLFD *)&pt->fds[0], pt->fds_count, (int)(timeout_us / LWS_US_PER_MS));
if (d < 0) {
lwsl_err("%s: WSAPoll failed: count %d, err %d: %d\n", __func__, pt->fds_count, d, WSAGetLastError());
return 0;
}
// lwsl_notice("%s: out\n", __func__);
#if defined(LWS_WITH_TLS)
if (pt->context->tls_ops &&
pt->context->tls_ops->fake_POLLIN_for_buffered)
pt->context->tls_ops->fake_POLLIN_for_buffered(pt);
#endif
for (n = 0; n < (int)pt->fds_count; n++)
if (pt->fds[n].fd != LWS_SOCK_INVALID && pt->fds[n].revents) {
// lwsl_notice("%s: idx %d, revents 0x%x\n", __func__, n, pt->fds[n].revents);
lws_service_fd_tsi(context, &pt->fds[n], tsi);
}
return 0;
}
int
lws_plat_service(struct lws_context *context, int timeout_ms)
{
return _lws_plat_service_tsi(context, timeout_ms, 0);
}
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