static
GCS_BACKEND_CLOSE_FN(dummy_close)
{
long ret = -ENOMEM;
dummy_t* dummy = backend->conn;
gcs_comp_msg_t* comp;
if (!dummy) return -EBADFD;
comp = gcs_comp_msg_leave ();
if (comp) {
ret = gcs_comp_msg_size(comp);
ret = gcs_dummy_inject_msg (backend, comp, ret, GCS_MSG_COMPONENT,
GCS_SENDER_NONE);
// Here's a race condition - some other thread can send something
// after leave message. But caller should guarantee serial access.
gu_fifo_close (dummy->gc_q);
if (ret > 0) ret = 0;
gcs_comp_msg_delete (comp);
}
dummy->state = DUMMY_CLOSED;
return ret;
}
static
GCS_BACKEND_OPEN_FN(dummy_open)
{
long ret = -ENOMEM;
dummy_t* dummy = backend->conn;
gcs_comp_msg_t* comp;
if (!dummy) {
gu_debug ("Backend not initialized");
return -EBADFD;
}
comp = gcs_comp_msg_new (true, false, 0, 1);
if (comp) {
ret = gcs_comp_msg_add (comp, "11111111-2222-3333-4444-555555555555");
assert (0 == ret); // we have only one member, index = 0
dummy->state = DUMMY_TRANS; // required by gcs_dummy_set_component()
ret = gcs_dummy_set_component (backend, comp); // install new component
if (ret >= 0) { // queue the message
ret = gcs_comp_msg_size(comp);
ret = gcs_dummy_inject_msg (backend, comp, ret, GCS_MSG_COMPONENT,
GCS_SENDER_NONE);
if (ret > 0) ret = 0;
}
gcs_comp_msg_delete (comp);
}
gu_debug ("Opened backend connection: %d (%s)", ret, strerror(-ret));
return ret;
}
static bool
DUMMY_INJECT_COMPONENT (gcs_backend_t* backend, const gcs_comp_msg_t* comp)
{
long ret = gcs_dummy_inject_msg (Backend, comp,
gcs_comp_msg_size(comp),
GCS_MSG_COMPONENT, GCS_SENDER_NONE);
FAIL_IF (ret <= 0, "gcs_dummy_inject_msg(): %ld (%s)", ret, strerror(ret));
return false;
}
static
GCS_BACKEND_SEND_FN(dummy_send)
{
int err = 0;
dummy_t* dummy = backend->conn;
if (gu_unlikely(NULL == dummy)) return -EBADFD;
if (gu_likely(DUMMY_PRIM == dummy->state))
{
err = gcs_dummy_inject_msg (backend, buf, len, msg_type,
backend->conn->my_idx);
}
else {
static long send_error[DUMMY_PRIM] =
{ -EBADFD, -EBADFD, -ENOTCONN, -EAGAIN };
err = send_error[dummy->state];
}
return err;
}
