void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len)
{
CharBackend *be = s->be;
if (be && be->chr_read) {
be->chr_read(be->opaque, buf, len);
}
}
static void mux_chr_send_event(MuxChardev *d, int mux_nr, int event)
{
CharBackend *be = d->backends[mux_nr];
if (be && be->chr_event) {
be->chr_event(be->opaque, event);
}
}
int qemu_chr_be_can_write(Chardev *s)
{
CharBackend *be = s->be;
if (!be || !be->chr_can_read) {
return 0;
}
return be->chr_can_read(be->opaque);
}
static void mux_chr_accept_input(Chardev *chr)
{
MuxChardev *d = MUX_CHARDEV(chr);
int m = d->focus;
CharBackend *be = d->backends[m];
while (be && d->prod[m] != d->cons[m] &&
be->chr_can_read && be->chr_can_read(be->opaque)) {
be->chr_read(be->opaque,
&d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
}
}
static int mux_chr_can_read(void *opaque)
{
MuxChardev *d = MUX_CHARDEV(opaque);
int m = d->focus;
CharBackend *be = d->backends[m];
if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE) {
return 1;
}
if (be && be->chr_can_read) {
return be->chr_can_read(be->opaque);
}
return 0;
}
void qemu_chr_be_event(Chardev *s, int event)
{
CharBackend *be = s->be;
/* Keep track if the char device is open */
switch (event) {
case CHR_EVENT_OPENED:
s->be_open = 1;
break;
case CHR_EVENT_CLOSED:
s->be_open = 0;
break;
}
if (!be || !be->chr_event) {
return;
}
be->chr_event(be->opaque, event);
}
static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
{
Chardev *chr = CHARDEV(opaque);
MuxChardev *d = MUX_CHARDEV(opaque);
int m = d->focus;
CharBackend *be = d->backends[m];
int i;
mux_chr_accept_input(opaque);
for (i = 0; i < size; i++)
if (mux_proc_byte(chr, d, buf[i])) {
if (d->prod[m] == d->cons[m] &&
be && be->chr_can_read &&
be->chr_can_read(be->opaque)) {
be->chr_read(be->opaque, &buf[i], 1);
} else {
d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
}
}
}
