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/* M-runtime for c++
* Copyright (C) 2005-2008 Vladimir Menshakov
*
* 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; either
* version 2.1 of the License, or (at your option) any later version.
* 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 "socket_set.h"
#include "tcp_socket.h"
#include "net_exception.h"
#include <assert.h>
#ifdef _WINDOWS
# include <Winsock2.h>
#else
# include <sys/select.h>
/* According to earlier standards */
# include <sys/time.h>
# include <sys/types.h>
# include <unistd.h>
# include <errno.h>
#endif
using namespace mrt;
const int SocketSet::Read = 1;
const int SocketSet::Write = 2;
const int SocketSet::Exception = 4;
SocketSet::SocketSet() : _r_set(new fd_set), _w_set(new fd_set), _e_set(new fd_set), _n(0) {
reset();
}
void SocketSet::reset() {
FD_ZERO((fd_set*)_r_set);
FD_ZERO((fd_set*)_w_set);
FD_ZERO((fd_set*)_e_set);
}
void SocketSet::add(const Socket &sock, const int how) {
int fd = sock._sock;
if (fd == -1)
throw_ex(("attempt to add uninitialized socket to set"));
if (!(how & (Read | Write | Exception))) {
LOG_WARN(("skip add in set %d", how));
return;
}
if (how & Read) {
FD_SET(fd, (fd_set*)_r_set);
}
if (how & Write) {
FD_SET(fd, (fd_set*)_w_set);
}
if (how & Exception) {
FD_SET(fd, (fd_set*)_e_set);
}
if (fd >= _n)
_n = fd + 1;
}
void SocketSet::add(const Socket *sock, const int how) {
if (sock == NULL)
throw_ex(("attempt to add NULL socket to set"));
add(*sock, how);
}
void SocketSet::remove(const Socket &sock) {
if (sock._sock == -1)
throw_ex(("attempt to remove uninitialized socket from set"));
FD_CLR(sock._sock, (fd_set*)_r_set);
FD_CLR(sock._sock, (fd_set*)_w_set);
FD_CLR(sock._sock, (fd_set*)_e_set);
}
const int SocketSet::check(const unsigned int timeout) {
struct timeval tv;
tv.tv_sec = timeout / 1000;
tv.tv_usec = ( timeout % 1000 ) * 1000;
int r = select(_n, (fd_set*)_r_set, (fd_set*)_w_set, (fd_set*)_e_set, &tv);
if (r == -1) {
#ifndef _WINDOWS
if (errno == EINTR)
return 0;
#endif
throw_net(("select"));
}
return r;
}
bool SocketSet::check(const Socket &sock, const int how) {
int fd = sock._sock;
if (fd == -1)
throw_ex(("check on uninitialized socket"));
if ((how & Read) != 0 && FD_ISSET(fd, ((fd_set*)_r_set)))
return true;
if ((how & Write) != 0 && FD_ISSET(fd, ((fd_set*)_w_set)))
return true;
if ((how & Exception) != 0 && FD_ISSET(fd, ((fd_set*)_e_set)))
return true;
return false;
}
bool SocketSet::check(const Socket *sock, const int how) {
return check(*sock, how);
}
SocketSet::~SocketSet() {
delete ((fd_set *)_r_set);
delete ((fd_set *)_w_set);
delete ((fd_set *)_e_set);
}
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