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qemu-char: use consistent idiom for removing sources 

Always check that the source is active, and zero the tag afterwards.

The occurrence in pty_chr_state will trigger with the next patch, the
others are just theoretical.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1366385529-10329-2-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Paolo Bonzini 2013-04-19 17:32:06 +02:00 committed by Anthony Liguori
parent 0aa0989757
commit 910b63682e
1 changed files with 23 additions and 9 deletions
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32
qemu-char.c
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@ -644,9 +644,11 @@ static gboolean io_watch_poll_dispatch(GSource *source, GSourceFunc callback,
static void io_watch_poll_finalize(GSource *source)
{
IOWatchPoll *iwp = io_watch_poll_from_source(source);
g_source_destroy(iwp->src);
g_source_unref(iwp->src);
iwp->src = NULL;
if (iwp->src) {
g_source_destroy(iwp->src);
g_source_unref(iwp->src);
iwp->src = NULL;
}
}
static GSourceFuncs io_watch_poll_funcs = {
@ -816,6 +818,7 @@ static void fd_chr_update_read_handler(CharDriverState *chr)
if (s->fd_in_tag) {
g_source_remove(s->fd_in_tag);
s->fd_in_tag = 0;
}
if (s->fd_in) {
@ -1148,8 +1151,10 @@ static void pty_chr_state(CharDriverState *chr, int connected)
PtyCharDriver *s = chr->opaque;
if (!connected) {
g_source_remove(s->fd_tag);
s->fd_tag = 0;
if (s->fd_tag) {
g_source_remove(s->fd_tag);
s->fd_tag = 0;
}
s->connected = 0;
s->polling = 0;
/* (re-)connect poll interval for idle guests: once per second.
@ -1171,12 +1176,14 @@ static void pty_chr_close(struct CharDriverState *chr)
if (s->fd_tag) {
g_source_remove(s->fd_tag);
s->fd_tag = 0;
}
fd = g_io_channel_unix_get_fd(s->fd);
g_io_channel_unref(s->fd);
close(fd);
if (s->timer_tag) {
g_source_remove(s->timer_tag);
s->timer_tag = 0;
}
g_free(s);
qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
@ -2277,6 +2284,7 @@ static void udp_chr_close(CharDriverState *chr)
NetCharDriver *s = chr->opaque;
if (s->tag) {
g_source_remove(s->tag);
s->tag = 0;
}
if (s->chan) {
g_io_channel_unref(s->chan);
@ -2508,8 +2516,10 @@ static gboolean tcp_chr_read(GIOChannel *chan, GIOCondition cond, void *opaque)
if (s->listen_chan) {
s->listen_tag = g_io_add_watch(s->listen_chan, G_IO_IN, tcp_chr_accept, chr);
}
g_source_remove(s->tag);
s->tag = 0;
if (s->tag) {
g_source_remove(s->tag);
s->tag = 0;
}
g_io_channel_unref(s->chan);
s->chan = NULL;
closesocket(s->fd);
@ -2570,8 +2580,10 @@ static int tcp_chr_add_client(CharDriverState *chr, int fd)
socket_set_nodelay(fd);
s->fd = fd;
s->chan = io_channel_from_socket(fd);
g_source_remove(s->listen_tag);
s->listen_tag = 0;
if (s->listen_tag) {
g_source_remove(s->listen_tag);
s->listen_tag = 0;
}
tcp_chr_connect(chr);
return 0;
@ -2621,6 +2633,7 @@ static void tcp_chr_close(CharDriverState *chr)
if (s->fd >= 0) {
if (s->tag) {
g_source_remove(s->tag);
s->tag = 0;
}
if (s->chan) {
g_io_channel_unref(s->chan);
@ -2630,6 +2643,7 @@ static void tcp_chr_close(CharDriverState *chr)
if (s->listen_fd >= 0) {
if (s->listen_tag) {
g_source_remove(s->listen_tag);
s->listen_tag = 0;
}
if (s->listen_chan) {
g_io_channel_unref(s->listen_chan);