/*
* If your compiler can inline your callback (i.e. it is visible to it at the place of the set call and
* your compiler is good :), then the method will be fully inlined into the thunking function, making it
* as fast as a direct C callback.
*
* revents was bitset
*
* if (revents & EV_READ ) fd->revents |= fd->events & POLLIN;
* if (revents & EV_WRITE) fd->revents |= fd->events & POLLOUT;
*/
void CNetBackend::accept_cb(ev::io &w, int32 revents)
{
if ( EV_ERROR & revents ) //error
{
GERROR() << "accept_cb error:" << strerror(errno) << "\n";
w.stop();
return;
}
struct sockaddr_in socket_address;
int32 length = sizeof( socket_address );
//w.fd is m_plistenning_socket->get_listen_socket_fd()
int32 fd = accept( w.fd,(sockaddr *)&socket_address,(socklen_t *)&length );
if ( fd < 0 )
{
if ( EWOULDBLOCK == errno || EAGAIN == errno ) //无连接libev怎么会调用accept_cb
{
GERROR() << "accept_cb EWOULDBLOCK or EAGAIN found\n";
return;
}
GERROR() << "accept new connection fail:" << strerror( errno ) << "\n";
return;
}
add_socket( fd,socket_address );
}
void DataSink::_DeleteAndCleanupWatcher(ev::io &watcher)
{
watcher.stop(); // Make watcher inactive
close(watcher.fd); // Close associated socket
int numWatchersRemoved = _watcherMap.erase(&watcher);
CHECK(numWatchersRemoved == 1);
delete &watcher; // Release memory
}
void readCallback(ev::io& w, int)
{
char buf[m_receiveBufferSize];
auto res = m_bfSocket->read(buf, m_receiveBufferSize);
m_receivedBytes += res;
ASSERT_EQ(buf[0], 0x47);
ASSERT_EQ(res, m_messageSize);
if(m_doneSending)
w.stop();
}
void Connection::read(ev::io &w, int revents) {
char buffer[BUFFER_SIZE];
ssize_t r = recv(w.fd, buffer, BUFFER_SIZE, MSG_NOSIGNAL);
if (r < 0) { // error
char err_buf[100];
log_file << "Error reading socket: " << strerror_r(errno, err_buf, 100) << std::endl;
w.stop();
delete this;
return;
} else if (r == 0) { // connection closed
w.stop();
delete this;
return;
} else {
parse(buffer, r, w);
if (closeConnection) {
w.stop();
shutdown(w.fd, SHUT_RDWR);
close(w.fd);
delete this;
}
}
}
void do_read(ev::io& w, int revents) {
/*now attempt the read*/
/*first use a select() to check: the event loop
might falsely trigger
*/
if((revents & ev::READ) && check_select(ev::READ)) {
/*now attempt a read*/
ioa.data.reset(
new std::vector<unsigned char>(READ_SIZE));
ssize_t rv = read(fd, io.data->begin(), READ_SIZE);
if(rv < 0) {
/*potential errors*/
switch(errno) {
/*ignore these*/
case EAGAIN:
case EINTR:
return;
break;
case EBADF:
todo.err(ioa, "not valid, or not "
"open for reading");
break;
case EFAULT:
todo.err(ioa, "internal error, buffer "
"misallocated");
break;
case EINVAL:
todo.err(ioa, "unsuitable for "
"reading");
break;
case EIO:
todo.err(ioa, "low-level i/o error");
break;
default:
todo.err(ioa, "unknown error type");
break;
}
} else if(rv == 0) {
todo.eof(ioa);
} else {
ioa.data->resize(rv);
todo.respond(ioa);
}
w.stop();
}
}
void AppServer::read_cb(ev::io &watcher, int revents)
{
if(EV_ERROR & revents)
{
perror("Error event in accept\n");
return;
}
char buffer[BUFFER_SIZE];
int readlen;
readlen = recv(watcher.fd, buffer, BUFFER_SIZE, 0);
if(readlen < 0)
{
perror("read error!\n");
return;
}
if(readlen == 0)
{
TESTINFO("client disconnected.\n");
XMessage msg;
msg.user_id = watcher.fd;
msg.msg_type = XMSG_DISCONN;
MessageHandler.push(msg);
watcher.stop();
return;
}
else//
{
buffer[readlen] = '\0';
TESTINFO("Received: %s", buffer);
MessageHandler.parse_and_push(buffer, watcher.fd);
}
return;
}
/* Socket dapat ditulis */
void write_cb(ev::io &watcher) {
if (write_queue.empty()) {
io.set(ev::READ);
return;
}
Buffer* buffer = write_queue.front();
ssize_t written = write(watcher.fd, buffer->dpos(), buffer->nbytes());
if (written < 0) {
perror("read error");
return;
}
buffer->pos += written;
if (buffer->nbytes() == 0) {
write_queue.pop_front();
delete buffer;
}
/* Tutup dan bebaskan watcher saat selesai mengirim response (stateless) */
io.stop();
close(sfd);
}
/* Hancurkan dan tutup */
virtual ~EchoInstance() {
/* Tutup dan bebaskan watcher saat socket ditutup */
io.stop();
close(sfd);
}
