1
0
Fork 0
mirror of https://github.com/warmcat/libwebsockets.git synced 2025-03-16 00:00:07 +01:00
libwebsockets/lib/libev.c
Andy Green 86ed65ff00 libuv integration
This gets the libuv stuff plumbed in and working.

Currently it's only workable for some service thread, and there
is an isolated valgrind problem left

==28425== 128 bytes in 1 blocks are definitely lost in loss record 3 of 3
==28425==    at 0x4C28C50: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==28425==    by 0x4C2AB1E: realloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==28425==    by 0x58BBB27: maybe_resize (core.c:748)
==28425==    by 0x58BBB27: uv__io_start (core.c:787)
==28425==    by 0x58C1B80: uv__signal_loop_once_init (signal.c:225)
==28425==    by 0x58C1B80: uv_signal_init (signal.c:260)
==28425==    by 0x58BF7A6: uv_loop_init (loop.c:66)
==28425==    by 0x4157F5: lws_uv_initloop (libuv.c:89)
==28425==    by 0x405536: main (test-server-libuv.c:284)

libuv wants to sign off on all libuv 'handles' that will close, and
callback to do the close confirmation asynchronously.  The wsi close function
is adapted when libuv is in use to work with libuv accordingly and exit the uv
loop the number of remaining wsi is zero.

Signed-off-by: Andy Green <andy.green@linaro.org>
2016-02-14 09:31:13 +08:00

214 lines
5.5 KiB
C

/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010-2014 Andy Green <andy@warmcat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include "private-libwebsockets.h"
void lws_feature_status_libev(struct lws_context_creation_info *info)
{
if (info->options & LWS_SERVER_OPTION_LIBEV)
lwsl_notice("libev support compiled in and enabled\n");
else
lwsl_notice("libev support compiled in but disabled\n");
}
static void
lws_accept_cb(struct ev_loop *loop, struct ev_io *watcher, int revents)
{
struct lws_io_watcher *lws_io = container_of(watcher,
struct lws_io_watcher, ev_watcher);
struct lws_context *context = lws_io->context;
struct lws_pollfd eventfd;
if (revents & EV_ERROR)
return;
eventfd.fd = watcher->fd;
eventfd.events = 0;
eventfd.revents = EV_NONE;
if (revents & EV_READ) {
eventfd.events |= LWS_POLLIN;
eventfd.revents |= LWS_POLLIN;
}
if (revents & EV_WRITE) {
eventfd.events |= LWS_POLLOUT;
eventfd.revents |= LWS_POLLOUT;
}
lws_service_fd(context, &eventfd);
}
LWS_VISIBLE void
lws_ev_sigint_cb(struct ev_loop *loop, struct ev_signal *watcher, int revents)
{
ev_break(loop, EVBREAK_ALL);
}
LWS_VISIBLE int
lws_ev_sigint_cfg(struct lws_context *context, int use_ev_sigint,
lws_ev_signal_cb_t *cb)
{
context->use_ev_sigint = use_ev_sigint;
if (cb)
context->lws_ev_sigint_cb = cb;
else
context->lws_ev_sigint_cb = &lws_ev_sigint_cb;
return 0;
}
LWS_VISIBLE int
lws_ev_initloop(struct lws_context *context, struct ev_loop *loop, int tsi)
{
struct ev_signal *w_sigint = &context->pt[tsi].w_sigint.ev_watcher;
struct ev_io *w_accept = &context->pt[tsi].w_accept.ev_watcher;
const char * backend_name;
int status = 0;
int backend;
if (!loop)
loop = ev_loop_new(0);
context->pt[tsi].io_loop_ev = loop;
/*
* Initialize the accept w_accept with the listening socket
* and register a callback for read operations
*/
ev_io_init(w_accept, lws_accept_cb, context->pt[tsi].lserv_fd, EV_READ);
ev_io_start(context->pt[tsi].io_loop_ev, w_accept);
/* Register the signal watcher unless the user says not to */
if (context->use_ev_sigint) {
ev_signal_init(w_sigint, context->lws_ev_sigint_cb, SIGINT);
ev_signal_start(context->pt[tsi].io_loop_ev, w_sigint);
}
backend = ev_backend(loop);
switch (backend) {
case EVBACKEND_SELECT:
backend_name = "select";
break;
case EVBACKEND_POLL:
backend_name = "poll";
break;
case EVBACKEND_EPOLL:
backend_name = "epoll";
break;
case EVBACKEND_KQUEUE:
backend_name = "kqueue";
break;
case EVBACKEND_DEVPOLL:
backend_name = "/dev/poll";
break;
case EVBACKEND_PORT:
backend_name = "Solaris 10 \"port\"";
break;
default:
backend_name = "Unknown libev backend";
break;
}
lwsl_notice(" libev backend: %s\n", backend_name);
return status;
}
void
lws_libev_destroyloop(struct lws_context *context, int tsi)
{
struct lws_context_per_thread *pt = &context->pt[tsi];
if (!(context->options & LWS_SERVER_OPTION_LIBEV))
return;
ev_io_stop(pt->io_loop_ev, &pt->w_accept.ev_watcher);
if (context->use_ev_sigint)
ev_signal_stop(pt->io_loop_ev,
&pt->w_sigint.ev_watcher);
if (!pt->ev_loop_foreign)
ev_loop_destroy(pt->io_loop_ev);
}
LWS_VISIBLE void
lws_libev_accept(struct lws *new_wsi, int accept_fd)
{
struct lws_context *context = lws_get_context(new_wsi);
struct ev_io *r = &new_wsi->w_read.ev_watcher;
struct ev_io *w = &new_wsi->w_write.ev_watcher;
if (!LWS_LIBEV_ENABLED(context))
return;
new_wsi->w_read.context = context;
new_wsi->w_write.context = context;
ev_io_init(r, lws_accept_cb, accept_fd, EV_READ);
ev_io_init(w, lws_accept_cb, accept_fd, EV_WRITE);
}
LWS_VISIBLE void
lws_libev_io(struct lws *wsi, int flags)
{
struct lws_context *context = lws_get_context(wsi);
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
if (!LWS_LIBEV_ENABLED(context))
return;
if (!pt->io_loop_ev || context->being_destroyed)
return;
assert((flags & (LWS_EV_START | LWS_EV_STOP)) &&
(flags & (LWS_EV_READ | LWS_EV_WRITE)));
if (flags & LWS_EV_START) {
if (flags & LWS_EV_WRITE)
ev_io_start(pt->io_loop_ev, &wsi->w_write.ev_watcher);
if (flags & LWS_EV_READ)
ev_io_start(pt->io_loop_ev, &wsi->w_read.ev_watcher);
} else {
if (flags & LWS_EV_WRITE)
ev_io_stop(pt->io_loop_ev, &wsi->w_write.ev_watcher);
if (flags & LWS_EV_READ)
ev_io_stop(pt->io_loop_ev, &wsi->w_read.ev_watcher);
}
}
LWS_VISIBLE int
lws_libev_init_fd_table(struct lws_context *context)
{
int n;
if (!LWS_LIBEV_ENABLED(context))
return 0;
for (n = 0; n < context->count_threads; n++) {
context->pt[n].w_accept.context = context;
context->pt[n].w_sigint.context = context;
}
return 1;
}
LWS_VISIBLE void
lws_libev_run(const struct lws_context *context, int tsi)
{
if (context->pt[tsi].io_loop_ev && LWS_LIBEV_ENABLED(context))
ev_run(context->pt[tsi].io_loop_ev, 0);
}