mirror of
https://github.com/warmcat/libwebsockets.git
synced 2025-03-23 00:00:06 +01:00
c6c7ab2b44
Event lib support as it has been isn't scaling well, at the low level libevent and libev headers have a namespace conflict so they can't both be built into the same image, and at the distro level, binding all the event libs to libwebsockets.so makes a bloaty situation for packaging, lws will drag in all the event libs every time. This patch implements the plan discussed here https://github.com/warmcat/libwebsockets/issues/1980 and refactors the event lib support so they are built into isolated plugins and bound at runtime according to what the application says it wants to use. The event lib plugins can be packaged individually so that only the needed sets of support are installed (perhaps none of them if the user code is OK with the default poll() loop). And dependent user code can mark the specific event loop plugin package as required so pieces are added as needed. The eventlib-foreign example is also refactored to build the selected lib support isolated. A readme is added detailing the changes and how to use them. https://libwebsockets.org/git/libwebsockets/tree/READMEs/README.event-libs.md
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/*
|
|
* libwebsockets - small server side websockets and web server implementation
|
|
*
|
|
* Copyright (C) 2010 - 2019 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_drop_app_privileges(struct lws_context *context, int actually_set)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
lws_plat_context_early_init(void)
|
|
{
|
|
WORD wVersionRequested;
|
|
WSADATA wsaData;
|
|
int err;
|
|
|
|
/* Use the MAKEWORD(lowbyte, highbyte) macro from Windef.h */
|
|
wVersionRequested = MAKEWORD(2, 2);
|
|
|
|
err = WSAStartup(wVersionRequested, &wsaData);
|
|
if (!err)
|
|
return 0;
|
|
/*
|
|
* Tell the user that we could not find a usable
|
|
* Winsock DLL
|
|
*/
|
|
lwsl_err("WSAStartup failed with error: %d\n", err);
|
|
|
|
return 1;
|
|
}
|
|
|
|
#if defined(LWS_WITH_PLUGINS)
|
|
static int
|
|
protocol_plugin_cb(struct lws_plugin *pin, void *each_user)
|
|
{
|
|
struct lws_context *context = (struct lws_context *)each_user;
|
|
const lws_plugin_protocol_t *plpr =
|
|
(const lws_plugin_protocol_t *)pin->hdr;
|
|
|
|
context->plugin_protocol_count += plpr->count_protocols;
|
|
context->plugin_extension_count += plpr->count_extensions;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
int
|
|
lws_plat_init(struct lws_context *context,
|
|
const struct lws_context_creation_info *info)
|
|
{
|
|
struct lws_context_per_thread *pt = &context->pt[0];
|
|
int i, n = context->count_threads;
|
|
|
|
for (i = 0; i < FD_HASHTABLE_MODULUS; i++) {
|
|
context->fd_hashtable[i].wsi =
|
|
lws_zalloc(sizeof(struct lws*) * context->max_fds,
|
|
"win hashtable");
|
|
|
|
if (!context->fd_hashtable[i].wsi)
|
|
return -1;
|
|
}
|
|
|
|
while (n--) {
|
|
pt->fds_count = 0;
|
|
pt->events = WSACreateEvent(); /* the cancel event */
|
|
InitializeCriticalSection(&pt->interrupt_lock);
|
|
|
|
pt++;
|
|
}
|
|
|
|
context->fd_random = 0;
|
|
|
|
#if defined(LWS_WITH_PLUGINS)
|
|
if (info->plugin_dirs)
|
|
lws_plat_plugins_init(&context->plugin_list, info->plugin_dirs,
|
|
"lws_protocol_plugin",
|
|
protocol_plugin_cb, context);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
lws_plat_context_early_destroy(struct lws_context *context)
|
|
{
|
|
struct lws_context_per_thread *pt = &context->pt[0];
|
|
int n = context->count_threads;
|
|
|
|
while (n--) {
|
|
WSACloseEvent(pt->events);
|
|
DeleteCriticalSection(&pt->interrupt_lock);
|
|
pt++;
|
|
}
|
|
}
|
|
|
|
void
|
|
lws_plat_context_late_destroy(struct lws_context *context)
|
|
{
|
|
int n;
|
|
|
|
#ifdef LWS_WITH_PLUGINS
|
|
if (context->plugin_list)
|
|
lws_plugins_destroy(&context->plugin_list);
|
|
#endif
|
|
|
|
for (n = 0; n < FD_HASHTABLE_MODULUS; n++) {
|
|
if (context->fd_hashtable[n].wsi)
|
|
lws_free(context->fd_hashtable[n].wsi);
|
|
}
|
|
|
|
WSACleanup();
|
|
}
|