4 * Copyright (c) 2017 Samsung Electronics Co., Ltd.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
27 #include "sensor_log.h"
28 #include "channel_event_handler.h"
30 #define SYSTEMD_SOCK_BUF_SIZE (128*1024)
34 class send_event_handler : public event_handler
37 send_event_handler(channel *ch, std::shared_ptr<message> msg)
42 bool handle(int fd, event_condition condition)
48 m_ch->remove_pending_event_id(m_event_id);
50 if (!m_ch->is_connected()) {
54 if (condition & (EVENT_IN | EVENT_HUP)) {
58 if (!m_ch->send_sync(*m_msg)) {
67 std::shared_ptr<message> m_msg;
70 class read_event_handler : public event_handler
73 read_event_handler(channel *ch)
77 bool handle(int fd, event_condition condition)
83 m_ch->remove_pending_event_id(m_event_id);
85 if (!m_ch->is_connected()) {
89 if (condition & (EVENT_OUT | EVENT_HUP)) {
94 if (!m_ch->read_sync(msg, false)) {
105 channel::channel(socket *sock)
106 : m_fd(sock->get_fd())
118 _D("Destroyed[%llu]", m_event_id);
119 if (is_connected()) {
124 uint64_t channel::bind(void)
127 m_event_id = m_loop->add_event(m_socket->get_fd(),
128 (EVENT_IN | EVENT_HUP | EVENT_NVAL),
129 dynamic_cast<channel_event_handler *>(m_handler));
131 _D("Bound[%llu]", m_event_id);
135 uint64_t channel::bind(channel_handler *handler, event_loop *loop, bool loop_bind)
139 m_connected.store(true);
142 m_handler->connected(this);
150 uint64_t channel::connect(channel_handler *handler, event_loop *loop, bool loop_bind)
152 if (!m_socket->connect())
155 bind(handler, loop, loop_bind);
157 _D("Connected[%llu]", m_event_id);
161 void channel::disconnect(void)
164 if (!is_connected()) {
165 _D("Channel is not connected");
169 m_connected.store(false);
171 _D("Disconnecting..[%llu]", m_event_id);
174 m_handler->disconnected(this);
179 for(auto id : m_pending_event_id) {
180 _D("Remove pending event id[%llu]", id);
181 m_loop->remove_event(id, true);
183 _D("Remove event[%llu]", m_event_id);
184 m_loop->remove_event(m_event_id, true);
190 _D("Release socket[%d]", m_socket->get_fd());
198 bool channel::send(std::shared_ptr<message> msg)
201 int cur_buffer_size = 0;
203 retv_if(!m_loop, false);
205 while (retry_cnt < 3) {
206 cur_buffer_size = m_socket->get_current_buffer_size();
207 if (cur_buffer_size <= SYSTEMD_SOCK_BUF_SIZE)
212 retvm_if(retry_cnt >= 3, false, "Socket buffer[%d] is exceeded", cur_buffer_size);
214 send_event_handler *handler = new(std::nothrow) send_event_handler(this, msg);
215 retvm_if(!handler, false, "Failed to allocate memory");
217 uint64_t event_id = m_loop->add_event(m_socket->get_fd(), (EVENT_OUT | EVENT_HUP | EVENT_NVAL), handler);
219 _D("Failed to add send event handler");
224 m_pending_event_id.push_back(event_id);
228 bool channel::send_sync(message &msg)
231 if (!is_connected()) {
232 _D("Channel is not connected");
236 retvm_if(msg.size() >= MAX_MSG_CAPACITY, true, "Invaild message size[%u]", msg.size());
239 char *buf = msg.body();
242 size = m_socket->send(reinterpret_cast<void *>(msg.header()),
243 sizeof(message_header), true);
244 retvm_if(size <= 0, false, "Failed to send header");
246 /* if body size is zero, skip to send body message */
247 retv_if(msg.size() == 0, true);
250 size = m_socket->send(buf, msg.size(), true);
251 retvm_if(size <= 0, false, "Failed to send body");
256 bool channel::read(void)
258 retv_if(!m_loop, false);
260 read_event_handler *handler = new(std::nothrow) read_event_handler(this);
261 retvm_if(!handler, false, "Failed to allocate memory");
263 uint64_t event_id = m_loop->add_event(m_socket->get_fd(), (EVENT_IN | EVENT_HUP | EVENT_NVAL), handler);
265 _D("Failed to add read event handler");
270 m_pending_event_id.push_back(event_id);
274 bool channel::read_sync(message &msg, bool select)
277 if (!is_connected()) {
278 _D("Channel is not connected");
282 message_header header;
284 char buf[MAX_MSG_CAPACITY];
287 size = m_socket->recv(&header, sizeof(message_header), select);
288 retv_if(size <= 0, false);
290 /* check error from header */
291 if (m_handler && header.err != 0) {
292 m_handler->error_caught(this, header.err);
293 msg.header()->err = header.err;
298 if (header.length >= MAX_MSG_CAPACITY) {
299 _E("header.length error %u", header.length);
303 if (header.length > 0) {
304 size = m_socket->recv(&buf, header.length, select);
305 retv_if(size <= 0, false);
308 buf[header.length] = '\0';
309 msg.enclose(reinterpret_cast<const void *>(buf), header.length);
310 msg.set_type(header.type);
311 msg.header()->err = header.err;
314 m_handler->read(this, msg);
319 bool channel::is_connected(void)
321 return m_connected.load();
324 bool channel::set_option(int type, int value)
328 m_socket->set_buffer_size(type, value);
331 m_socket->set_buffer_size(type, value);
340 bool channel::get_option(int type, int &value) const
344 value = m_socket->get_current_buffer_size();
347 value = m_socket->get_buffer_size(type);
350 value = m_socket->get_buffer_size(type);
359 int channel::get_fd(void) const
364 void channel::remove_pending_event_id(uint64_t id)
366 auto it = std::find(m_pending_event_id.begin(), m_pending_event_id.end(), id);
367 if (it != m_pending_event_id.end()) {
368 m_pending_event_id.erase(it);