c3d3f1dedb
Apparently, only a single WRITABLE/READABLE callback is called at each servicing. For this reason, we want to keep servicing until we end up not receiving any callback. When that happens, we can assume that we can't (or don't want to) write more, and that there is nothing left to read in the socket buffer.
110 lines
4.6 KiB
C++
110 lines
4.6 KiB
C++
/*************************************************************************/
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/* lws_helper.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in 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, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef LWS_HELPER_H
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#define LWS_HELPER_H
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#define LWS_BUF_SIZE 65536
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#define LWS_PACKET_SIZE LWS_BUF_SIZE
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#include "core/io/stream_peer.h"
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#include "core/os/os.h"
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#include "core/reference.h"
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#include "core/ring_buffer.h"
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#include "lws_peer.h"
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struct _LWSRef {
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bool free_context;
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bool is_polling;
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bool is_valid;
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bool is_destroying;
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void *obj;
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struct lws_protocols *lws_structs;
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char *lws_names;
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};
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_LWSRef *_lws_create_ref(void *obj);
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void _lws_free_ref(_LWSRef *ref);
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bool _lws_destroy(struct lws_context *context, _LWSRef *ref);
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bool _lws_poll(struct lws_context *context, _LWSRef *ref);
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void _lws_make_protocols(void *p_obj, lws_callback_function *p_callback, PoolVector<String> p_names, _LWSRef **r_lws_ref);
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/* clang-format off */
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#define LWS_HELPER(CNAME) \
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protected: \
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struct _LWSRef *_lws_ref; \
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struct lws_context *context; \
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bool _keep_servicing; \
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\
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static int _lws_gd_callback(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len) { \
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\
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if (wsi == NULL) { \
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return 0; \
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} \
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\
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struct _LWSRef *ref = (struct _LWSRef *)lws_context_user(lws_get_context(wsi)); \
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if (!ref->is_valid) \
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return 0; \
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CNAME *helper = (CNAME *)ref->obj; \
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helper->_keep_servicing = true; \
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return helper->_handle_cb(wsi, reason, user, in, len); \
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} \
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\
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void invalidate_lws_ref() { \
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if (_lws_ref != NULL) \
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_lws_ref->is_valid = false; \
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} \
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\
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void destroy_context() { \
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if (_lws_destroy(context, _lws_ref)) { \
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context = NULL; \
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_lws_ref = NULL; \
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} \
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} \
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\
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public: \
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virtual int _handle_cb(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len); \
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\
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void _lws_poll() { \
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ERR_FAIL_COND(context == NULL); \
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do { \
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_keep_servicing = false; \
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if (::_lws_poll(context, _lws_ref)) { \
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context = NULL; \
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_lws_ref = NULL; \
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break; \
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} \
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} while (_keep_servicing); \
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} \
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\
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protected:
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/* clang-format on */
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#endif // LWS_HELPER_H
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