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char: add chr_wait_connected callback 

A function to wait on the backend to be connected, to be used in the
following patches.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-07-27 01:15:17 +04:00 committed by Michael S. Tsirkin
parent 8695de0fcf
commit 6b6723c3b5
2 changed files with 17 additions and 0 deletions
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8
include/sysemu/char.h
View File

@ -70,6 +70,7 @@ struct CharDriverState {
int (*get_msgfds)(struct CharDriverState *s, int* fds, int num); int (*get_msgfds)(struct CharDriverState *s, int* fds, int num);
int (*set_msgfds)(struct CharDriverState *s, int *fds, int num); int (*set_msgfds)(struct CharDriverState *s, int *fds, int num);
int (*chr_add_client)(struct CharDriverState *chr, int fd); int (*chr_add_client)(struct CharDriverState *chr, int fd);
int (*chr_wait_connected)(struct CharDriverState *chr, Error **errp);
IOEventHandler *chr_event; IOEventHandler *chr_event;
IOCanReadHandler *chr_can_read; IOCanReadHandler *chr_can_read;
IOReadHandler *chr_read; IOReadHandler *chr_read;
@ -158,6 +159,13 @@ void qemu_chr_disconnect(CharDriverState *chr);
*/ */
void qemu_chr_cleanup(void); void qemu_chr_cleanup(void);
/**
* @qemu_chr_wait_connected:
*
* Wait for characted backend to be connected.
*/
int qemu_chr_wait_connected(CharDriverState *chr, Error **errp);
/** /**
* @qemu_chr_new_noreplay: * @qemu_chr_new_noreplay:
* *

9
qemu-char.c
View File

@ -3139,6 +3139,15 @@ static gboolean tcp_chr_accept(QIOChannel *channel,
return TRUE; return TRUE;
} }
int qemu_chr_wait_connected(CharDriverState *chr, Error **errp)
{
if (chr->chr_wait_connected) {
return chr->chr_wait_connected(chr, errp);
}
return 0;
}
static void tcp_chr_close(CharDriverState *chr) static void tcp_chr_close(CharDriverState *chr)
{ {
TCPCharDriver *s = chr->opaque; TCPCharDriver *s = chr->opaque;