Add qemu_chr_add_handlers_full() API, we can use
this API pass in a GMainContext,make handler run
in the context rather than main_loop.
This comments from Daniel P . Berrange.
Signed-off-by: Zhang Chen <zhangchen.f...@cn.fujitsu.com>
Signed-off-by: Li Zhijian <lizhij...@cn.fujitsu.com>
Signed-off-by: Wen Congyang <we...@cn.fujitsu.com>
Reviewed-by: Daniel P. Berrange <berra...@redhat.com>
---
include/sysemu/char.h | 11 +++++++-
qemu-char.c | 77
+++++++++++++++++++++++++++++++++++----------------
2 files changed, 63 insertions(+), 25 deletions(-)
diff --git a/include/sysemu/char.h b/include/sysemu/char.h
index 307fd8f..f997849 100644
--- a/include/sysemu/char.h
+++ b/include/sysemu/char.h
@@ -65,7 +65,8 @@ struct CharDriverState {
int (*chr_sync_read)(struct CharDriverState *s,
const uint8_t *buf, int len);
GSource *(*chr_add_watch)(struct CharDriverState *s,
GIOCondition cond);
- void (*chr_update_read_handler)(struct CharDriverState *s);
+ void (*chr_update_read_handler)(struct CharDriverState *s,
+ GMainContext *context);
int (*chr_ioctl)(struct CharDriverState *s, int cmd, void *arg);
int (*get_msgfds)(struct CharDriverState *s, int* fds, int num);
int (*set_msgfds)(struct CharDriverState *s, int *fds, int num);
@@ -388,6 +389,14 @@ void qemu_chr_add_handlers(CharDriverState *s,
IOEventHandler *fd_event,
void *opaque);
+/* This API can make handler run in the context what you pass to. */
+void qemu_chr_add_handlers_full(CharDriverState *s,
+ IOCanReadHandler *fd_can_read,
+ IOReadHandler *fd_read,
+ IOEventHandler *fd_event,
+ void *opaque,
+ GMainContext *context);
+
void qemu_chr_be_generic_open(CharDriverState *s);
void qemu_chr_accept_input(CharDriverState *s);
int qemu_chr_add_client(CharDriverState *s, int fd);
diff --git a/qemu-char.c b/qemu-char.c
index b597ee1..a926175 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -448,11 +448,12 @@ void qemu_chr_fe_printf(CharDriverState *s,
const char *fmt, ...)
static void remove_fd_in_watch(CharDriverState *chr);
-void qemu_chr_add_handlers(CharDriverState *s,
- IOCanReadHandler *fd_can_read,
- IOReadHandler *fd_read,
- IOEventHandler *fd_event,
- void *opaque)
+void qemu_chr_add_handlers_full(CharDriverState *s,
+ IOCanReadHandler *fd_can_read,
+ IOReadHandler *fd_read,
+ IOEventHandler *fd_event,
+ void *opaque,
+ GMainContext *context)
{
int fe_open;
@@ -466,8 +467,9 @@ void qemu_chr_add_handlers(CharDriverState *s,
s->chr_read = fd_read;
s->chr_event = fd_event;
s->handler_opaque = opaque;
- if (fe_open && s->chr_update_read_handler)
- s->chr_update_read_handler(s);
+ if (fe_open && s->chr_update_read_handler) {
+ s->chr_update_read_handler(s, context);
+ }
if (!s->explicit_fe_open) {
qemu_chr_fe_set_open(s, fe_open);
@@ -480,6 +482,16 @@ void qemu_chr_add_handlers(CharDriverState *s,
}
}
+void qemu_chr_add_handlers(CharDriverState *s,
+ IOCanReadHandler *fd_can_read,
+ IOReadHandler *fd_read,
+ IOEventHandler *fd_event,
+ void *opaque)
+{
+ qemu_chr_add_handlers_full(s, fd_can_read, fd_read,
+ fd_event, opaque, NULL);
+}
+
static int null_chr_write(CharDriverState *chr, const uint8_t *buf,
int len)
{
return len;
@@ -717,7 +729,8 @@ static void mux_chr_event(void *opaque, int event)
mux_chr_send_event(d, i, event);
}
-static void mux_chr_update_read_handler(CharDriverState *chr)
+static void mux_chr_update_read_handler(CharDriverState *chr,
+ GMainContext *context)
{
MuxDriver *d = chr->opaque;
@@ -731,8 +744,10 @@ static void
mux_chr_update_read_handler(CharDriverState *chr)
d->chr_event[d->mux_cnt] = chr->chr_event;
/* Fix up the real driver with mux routines */
if (d->mux_cnt == 0) {
- qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
- mux_chr_event, chr);
+ qemu_chr_add_handlers_full(d->drv, mux_chr_can_read,
+ mux_chr_read,
+ mux_chr_event,
+ chr, context);
}
if (d->focus != -1) {
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
@@ -840,6 +855,7 @@ typedef struct IOWatchPoll
IOCanReadHandler *fd_can_read;
GSourceFunc fd_read;
void *opaque;
+ GMainContext *context;
} IOWatchPoll;
static IOWatchPoll *io_watch_poll_from_source(GSource *source)
@@ -847,7 +863,8 @@ static IOWatchPoll
*io_watch_poll_from_source(GSource *source)
return container_of(source, IOWatchPoll, parent);
}
-static gboolean io_watch_poll_prepare(GSource *source, gint *timeout_)
+static gboolean io_watch_poll_prepare(GSource *source,
+ gint *timeout_)
{
IOWatchPoll *iwp = io_watch_poll_from_source(source);
bool now_active = iwp->fd_can_read(iwp->opaque) > 0;
@@ -860,7 +877,7 @@ static gboolean io_watch_poll_prepare(GSource
*source, gint *timeout_)
iwp->src = qio_channel_create_watch(
iwp->ioc, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL);
g_source_set_callback(iwp->src, iwp->fd_read, iwp->opaque,
NULL);
- g_source_attach(iwp->src, NULL);
+ g_source_attach(iwp->src, iwp->context);
} else {
g_source_destroy(iwp->src);
g_source_unref(iwp->src);
@@ -907,19 +924,22 @@ static GSourceFuncs io_watch_poll_funcs = {
static guint io_add_watch_poll(QIOChannel *ioc,
IOCanReadHandler *fd_can_read,
QIOChannelFunc fd_read,
- gpointer user_data)
+ gpointer user_data,
+ GMainContext *context)
{
IOWatchPoll *iwp;
int tag;
- iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs,
sizeof(IOWatchPoll));
+ iwp = (IOWatchPoll *) g_source_new(&io_watch_poll_funcs,
+ sizeof(IOWatchPoll));
iwp->fd_can_read = fd_can_read;
iwp->opaque = user_data;
iwp->ioc = ioc;
iwp->fd_read = (GSourceFunc) fd_read;
iwp->src = NULL;
+ iwp->context = context;
- tag = g_source_attach(&iwp->parent, NULL);
+ tag = g_source_attach(&iwp->parent, context);
g_source_unref(&iwp->parent);
return tag;
}
@@ -1051,7 +1071,8 @@ static GSource *fd_chr_add_watch(CharDriverState
*chr, GIOCondition cond)
return qio_channel_create_watch(s->ioc_out, cond);
}
-static void fd_chr_update_read_handler(CharDriverState *chr)
+static void fd_chr_update_read_handler(CharDriverState *chr,
+ GMainContext *context)
{
FDCharDriver *s = chr->opaque;
@@ -1059,7 +1080,8 @@ static void
fd_chr_update_read_handler(CharDriverState *chr)
if (s->ioc_in) {
chr->fd_in_tag = io_add_watch_poll(s->ioc_in,
fd_chr_read_poll,
- fd_chr_read, chr);
+ fd_chr_read, chr,
+ context);
}
}
@@ -1303,7 +1325,8 @@ static void
pty_chr_update_read_handler_locked(CharDriverState *chr)
}
}
-static void pty_chr_update_read_handler(CharDriverState *chr)
+static void pty_chr_update_read_handler(CharDriverState *chr,
+ GMainContext *context)
{
qemu_mutex_lock(&chr->chr_write_lock);
pty_chr_update_read_handler_locked(chr);
@@ -1407,7 +1430,8 @@ static void pty_chr_state(CharDriverState *chr,
int connected)
if (!chr->fd_in_tag) {
chr->fd_in_tag = io_add_watch_poll(s->ioc,
pty_chr_read_poll,
- pty_chr_read, chr);
+ pty_chr_read,
+ chr, NULL);
}
}
}
@@ -2546,7 +2570,8 @@ static gboolean udp_chr_read(QIOChannel *chan,
GIOCondition cond, void *opaque)
return TRUE;
}
-static void udp_chr_update_read_handler(CharDriverState *chr)
+static void udp_chr_update_read_handler(CharDriverState *chr,
+ GMainContext *context)
{
NetCharDriver *s = chr->opaque;
@@ -2554,7 +2579,8 @@ static void
udp_chr_update_read_handler(CharDriverState *chr)
if (s->ioc) {
chr->fd_in_tag = io_add_watch_poll(s->ioc,
udp_chr_read_poll,
- udp_chr_read, chr);
+ udp_chr_read, chr,
+ context);
}
}
@@ -2931,12 +2957,14 @@ static void tcp_chr_connect(void *opaque)
if (s->ioc) {
chr->fd_in_tag = io_add_watch_poll(s->ioc,
tcp_chr_read_poll,
- tcp_chr_read, chr);
+ tcp_chr_read,
+ chr, NULL);
}
qemu_chr_be_generic_open(chr);
}
-static void tcp_chr_update_read_handler(CharDriverState *chr)
+static void tcp_chr_update_read_handler(CharDriverState *chr,
+ GMainContext *context)
{
TCPCharDriver *s = chr->opaque;
@@ -2948,7 +2976,8 @@ static void
tcp_chr_update_read_handler(CharDriverState *chr)
if (s->ioc) {
chr->fd_in_tag = io_add_watch_poll(s->ioc,
tcp_chr_read_poll,
- tcp_chr_read, chr);
+ tcp_chr_read, chr,
+ context);
}
}
