353 lines
8.7 KiB
C
353 lines
8.7 KiB
C
/*
|
|
* QEMU I/O channels watch helper APIs
|
|
*
|
|
* Copyright (c) 2015 Red Hat, Inc.
|
|
*
|
|
* 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 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "io/channel-watch.h"
|
|
|
|
typedef struct QIOChannelFDSource QIOChannelFDSource;
|
|
struct QIOChannelFDSource {
|
|
GSource parent;
|
|
GPollFD fd;
|
|
QIOChannel *ioc;
|
|
GIOCondition condition;
|
|
};
|
|
|
|
|
|
#ifdef CONFIG_WIN32
|
|
typedef struct QIOChannelSocketSource QIOChannelSocketSource;
|
|
struct QIOChannelSocketSource {
|
|
GSource parent;
|
|
GPollFD fd;
|
|
QIOChannel *ioc;
|
|
SOCKET socket;
|
|
int revents;
|
|
GIOCondition condition;
|
|
};
|
|
|
|
#endif
|
|
|
|
|
|
typedef struct QIOChannelFDPairSource QIOChannelFDPairSource;
|
|
struct QIOChannelFDPairSource {
|
|
GSource parent;
|
|
GPollFD fdread;
|
|
GPollFD fdwrite;
|
|
QIOChannel *ioc;
|
|
GIOCondition condition;
|
|
};
|
|
|
|
|
|
static gboolean
|
|
qio_channel_fd_source_prepare(GSource *source G_GNUC_UNUSED,
|
|
gint *timeout)
|
|
{
|
|
*timeout = -1;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
qio_channel_fd_source_check(GSource *source)
|
|
{
|
|
QIOChannelFDSource *ssource = (QIOChannelFDSource *)source;
|
|
|
|
return ssource->fd.revents & ssource->condition;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
qio_channel_fd_source_dispatch(GSource *source,
|
|
GSourceFunc callback,
|
|
gpointer user_data)
|
|
{
|
|
QIOChannelFunc func = (QIOChannelFunc)callback;
|
|
QIOChannelFDSource *ssource = (QIOChannelFDSource *)source;
|
|
|
|
return (*func)(ssource->ioc,
|
|
ssource->fd.revents & ssource->condition,
|
|
user_data);
|
|
}
|
|
|
|
|
|
static void
|
|
qio_channel_fd_source_finalize(GSource *source)
|
|
{
|
|
QIOChannelFDSource *ssource = (QIOChannelFDSource *)source;
|
|
|
|
object_unref(OBJECT(ssource->ioc));
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_WIN32
|
|
static gboolean
|
|
qio_channel_socket_source_prepare(GSource *source G_GNUC_UNUSED,
|
|
gint *timeout)
|
|
{
|
|
*timeout = -1;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/*
|
|
* NB, this impl only works when the socket is in non-blocking
|
|
* mode on Win32
|
|
*/
|
|
static gboolean
|
|
qio_channel_socket_source_check(GSource *source)
|
|
{
|
|
static struct timeval tv0;
|
|
|
|
QIOChannelSocketSource *ssource = (QIOChannelSocketSource *)source;
|
|
WSANETWORKEVENTS ev;
|
|
fd_set rfds, wfds, xfds;
|
|
|
|
if (!ssource->condition) {
|
|
return 0;
|
|
}
|
|
|
|
WSAEnumNetworkEvents(ssource->socket, ssource->ioc->event, &ev);
|
|
|
|
FD_ZERO(&rfds);
|
|
FD_ZERO(&wfds);
|
|
FD_ZERO(&xfds);
|
|
if (ssource->condition & G_IO_IN) {
|
|
FD_SET((SOCKET)ssource->socket, &rfds);
|
|
}
|
|
if (ssource->condition & G_IO_OUT) {
|
|
FD_SET((SOCKET)ssource->socket, &wfds);
|
|
}
|
|
if (ssource->condition & G_IO_PRI) {
|
|
FD_SET((SOCKET)ssource->socket, &xfds);
|
|
}
|
|
ssource->revents = 0;
|
|
if (select(0, &rfds, &wfds, &xfds, &tv0) == 0) {
|
|
return 0;
|
|
}
|
|
|
|
if (FD_ISSET(ssource->socket, &rfds)) {
|
|
ssource->revents |= G_IO_IN;
|
|
}
|
|
if (FD_ISSET(ssource->socket, &wfds)) {
|
|
ssource->revents |= G_IO_OUT;
|
|
}
|
|
if (FD_ISSET(ssource->socket, &xfds)) {
|
|
ssource->revents |= G_IO_PRI;
|
|
}
|
|
|
|
return ssource->revents;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
qio_channel_socket_source_dispatch(GSource *source,
|
|
GSourceFunc callback,
|
|
gpointer user_data)
|
|
{
|
|
QIOChannelFunc func = (QIOChannelFunc)callback;
|
|
QIOChannelSocketSource *ssource = (QIOChannelSocketSource *)source;
|
|
|
|
return (*func)(ssource->ioc, ssource->revents, user_data);
|
|
}
|
|
|
|
|
|
static void
|
|
qio_channel_socket_source_finalize(GSource *source)
|
|
{
|
|
QIOChannelSocketSource *ssource = (QIOChannelSocketSource *)source;
|
|
|
|
object_unref(OBJECT(ssource->ioc));
|
|
}
|
|
|
|
|
|
GSourceFuncs qio_channel_socket_source_funcs = {
|
|
qio_channel_socket_source_prepare,
|
|
qio_channel_socket_source_check,
|
|
qio_channel_socket_source_dispatch,
|
|
qio_channel_socket_source_finalize
|
|
};
|
|
#endif
|
|
|
|
|
|
static gboolean
|
|
qio_channel_fd_pair_source_prepare(GSource *source G_GNUC_UNUSED,
|
|
gint *timeout)
|
|
{
|
|
*timeout = -1;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
qio_channel_fd_pair_source_check(GSource *source)
|
|
{
|
|
QIOChannelFDPairSource *ssource = (QIOChannelFDPairSource *)source;
|
|
GIOCondition poll_condition = ssource->fdread.revents |
|
|
ssource->fdwrite.revents;
|
|
|
|
return poll_condition & ssource->condition;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
qio_channel_fd_pair_source_dispatch(GSource *source,
|
|
GSourceFunc callback,
|
|
gpointer user_data)
|
|
{
|
|
QIOChannelFunc func = (QIOChannelFunc)callback;
|
|
QIOChannelFDPairSource *ssource = (QIOChannelFDPairSource *)source;
|
|
GIOCondition poll_condition = ssource->fdread.revents |
|
|
ssource->fdwrite.revents;
|
|
|
|
return (*func)(ssource->ioc,
|
|
poll_condition & ssource->condition,
|
|
user_data);
|
|
}
|
|
|
|
|
|
static void
|
|
qio_channel_fd_pair_source_finalize(GSource *source)
|
|
{
|
|
QIOChannelFDPairSource *ssource = (QIOChannelFDPairSource *)source;
|
|
|
|
object_unref(OBJECT(ssource->ioc));
|
|
}
|
|
|
|
|
|
GSourceFuncs qio_channel_fd_source_funcs = {
|
|
qio_channel_fd_source_prepare,
|
|
qio_channel_fd_source_check,
|
|
qio_channel_fd_source_dispatch,
|
|
qio_channel_fd_source_finalize
|
|
};
|
|
|
|
|
|
GSourceFuncs qio_channel_fd_pair_source_funcs = {
|
|
qio_channel_fd_pair_source_prepare,
|
|
qio_channel_fd_pair_source_check,
|
|
qio_channel_fd_pair_source_dispatch,
|
|
qio_channel_fd_pair_source_finalize
|
|
};
|
|
|
|
|
|
GSource *qio_channel_create_fd_watch(QIOChannel *ioc,
|
|
int fd,
|
|
GIOCondition condition)
|
|
{
|
|
GSource *source;
|
|
QIOChannelFDSource *ssource;
|
|
|
|
source = g_source_new(&qio_channel_fd_source_funcs,
|
|
sizeof(QIOChannelFDSource));
|
|
ssource = (QIOChannelFDSource *)source;
|
|
|
|
ssource->ioc = ioc;
|
|
object_ref(OBJECT(ioc));
|
|
|
|
ssource->condition = condition;
|
|
|
|
#ifdef CONFIG_WIN32
|
|
ssource->fd.fd = (gint64)_get_osfhandle(fd);
|
|
#else
|
|
ssource->fd.fd = fd;
|
|
#endif
|
|
ssource->fd.events = condition;
|
|
|
|
g_source_add_poll(source, &ssource->fd);
|
|
|
|
return source;
|
|
}
|
|
|
|
#ifdef CONFIG_WIN32
|
|
GSource *qio_channel_create_socket_watch(QIOChannel *ioc,
|
|
int socket,
|
|
GIOCondition condition)
|
|
{
|
|
GSource *source;
|
|
QIOChannelSocketSource *ssource;
|
|
|
|
#ifdef WIN32
|
|
WSAEventSelect(socket, ioc->event,
|
|
FD_READ | FD_ACCEPT | FD_CLOSE |
|
|
FD_CONNECT | FD_WRITE | FD_OOB);
|
|
#endif
|
|
|
|
source = g_source_new(&qio_channel_socket_source_funcs,
|
|
sizeof(QIOChannelSocketSource));
|
|
ssource = (QIOChannelSocketSource *)source;
|
|
|
|
ssource->ioc = ioc;
|
|
object_ref(OBJECT(ioc));
|
|
|
|
ssource->condition = condition;
|
|
ssource->socket = socket;
|
|
ssource->revents = 0;
|
|
|
|
ssource->fd.fd = (gintptr)ioc->event;
|
|
ssource->fd.events = G_IO_IN;
|
|
|
|
g_source_add_poll(source, &ssource->fd);
|
|
|
|
return source;
|
|
}
|
|
#else
|
|
GSource *qio_channel_create_socket_watch(QIOChannel *ioc,
|
|
int socket,
|
|
GIOCondition condition)
|
|
{
|
|
return qio_channel_create_fd_watch(ioc, socket, condition);
|
|
}
|
|
#endif
|
|
|
|
GSource *qio_channel_create_fd_pair_watch(QIOChannel *ioc,
|
|
int fdread,
|
|
int fdwrite,
|
|
GIOCondition condition)
|
|
{
|
|
GSource *source;
|
|
QIOChannelFDPairSource *ssource;
|
|
|
|
source = g_source_new(&qio_channel_fd_pair_source_funcs,
|
|
sizeof(QIOChannelFDPairSource));
|
|
ssource = (QIOChannelFDPairSource *)source;
|
|
|
|
ssource->ioc = ioc;
|
|
object_ref(OBJECT(ioc));
|
|
|
|
ssource->condition = condition;
|
|
|
|
#ifdef CONFIG_WIN32
|
|
ssource->fdread.fd = (gint64)_get_osfhandle(fdread);
|
|
ssource->fdwrite.fd = (gint64)_get_osfhandle(fdwrite);
|
|
#else
|
|
ssource->fdread.fd = fdread;
|
|
ssource->fdwrite.fd = fdwrite;
|
|
#endif
|
|
|
|
ssource->fdread.events = condition & G_IO_IN;
|
|
ssource->fdwrite.events = condition & G_IO_OUT;
|
|
|
|
g_source_add_poll(source, &ssource->fdread);
|
|
g_source_add_poll(source, &ssource->fdwrite);
|
|
|
|
return source;
|
|
}
|