static void
_defer(struct gridd_client_pool_s *pool, struct event_client_s *ev)
{
EXTRA_ASSERT(pool != NULL);
EXTRA_ASSERT(pool->vtable == &VTABLE);
EXTRA_ASSERT(ev != NULL);
EXTRA_ASSERT(pool->pending_clients != NULL);
EXTRA_ASSERT(pool->fd_out >= 0);
if (pool->closed) {
GRID_INFO("Request dropped");
event_client_free(ev);
}
else {
guint8 c = 0;
g_async_queue_push(pool->pending_clients, ev);
(void) metautils_syscall_write(pool->fd_out, &c, 1);
}
}
static GError *
_client_manage_event_in_buffer(struct gridd_client_s *client, guint8 *d, gsize ds)
{
ssize_t rc;
switch (client->step) {
case CONNECTING:
g_assert(client->fd >= 0);
client->step = client->request ? REQ_SENDING : CONNECTED;
return NULL;
case REQ_SENDING:
client->step = REQ_SENDING;
g_get_current_time(&(client->tv_step));
if (!client->request)
return NULL;
_client_reset_reply(client);
/* Continue to send the request */
rc = metautils_syscall_write(client->fd,
client->request->data + client->sent_bytes,
client->request->len - client->sent_bytes);
if (rc < 0)
return (errno == EINTR || errno == EAGAIN) ? NULL :
NEWERROR(errno, "write error (%s)", strerror(errno));
if (rc > 0)
client->sent_bytes += rc;
if (client->sent_bytes < client->request->len)
return NULL;
client->step = REP_READING_SIZE;
case REP_READING_SIZE:
client->step = REP_READING_SIZE;
g_get_current_time(&(client->tv_step));
if (!client->reply)
client->reply = g_byte_array_new();
if (client->reply->len < 4) {
/* Continue reading the size */
rc = metautils_syscall_read(client->fd, d, ds);
if (rc < 0)
return (errno == EINTR || errno == EAGAIN) ? NULL :
NEWERROR(errno, "read error (%s)", strerror(errno));
if (rc > 0)
g_byte_array_append(client->reply, d, rc);
if (client->reply->len < 4) {
if (!rc)
return NEWERROR(errno, "EOF!");
return NULL;
}
}
client->size = l4v_get_size(client->reply->data);
case REP_READING_DATA:
client->step = REP_READING_DATA;
g_get_current_time(&(client->tv_step));
rc = 0;
if (client->reply->len < client->size+4) {
rc = metautils_syscall_read(client->fd, d, ds);
if (rc < 0)
return (errno == EINTR || errno == EAGAIN) ? NULL :
NEWERROR(errno, "read error (%s)", strerror(errno));
if (rc > 0)
g_byte_array_append(client->reply, d, rc);
}
if (client->reply->len >= client->size+4) {
GError *err = _client_manage_reply_data(client);
if (err) {
client->step = STATUS_FAILED;
return err;
}
else {
if (client->step != CONNECTING && client->step != STATUS_FAILED
&& client->step != STATUS_OK) {
client->reply = g_byte_array_remove_range(client->reply, 0,
client->size+4);
client->step = REP_READING_SIZE;
client->size = 0;
}
}
}
else if (!rc)
return NEWERROR(errno, "EOF!");
return NULL;
default:
g_assert_not_reached();
return NEWERROR(0, "Invalid state");
}
g_assert_not_reached();
return NEWERROR(0, "BUG unreachable code");
}
static GError *
_client_manage_event_in_buffer(struct gridd_client_s *client, guint8 *d, gsize ds)
{
guint32 s32;
ssize_t rc;
switch (client->step) {
case CONNECTING:
EXTRA_ASSERT(client->fd >= 0);
EXTRA_ASSERT(client->request != NULL);
client->step = REQ_SENDING;
return NULL;
case REQ_SENDING:
client->step = REQ_SENDING;
if (!client->request)
return NULL;
_client_reset_reply(client);
/* Continue to send the request */
rc = metautils_syscall_write(client->fd,
client->request->data + client->sent_bytes,
client->request->len - client->sent_bytes);
if (rc < 0)
return (errno == EINTR || errno == EAGAIN) ? NULL :
NEWERROR(errno, "write error (%s)", strerror(errno));
if (rc > 0)
client->sent_bytes += rc;
if (client->sent_bytes < client->request->len)
return NULL;
client->step = REP_READING_SIZE;
case REP_READING_SIZE:
client->step = REP_READING_SIZE;
if (!client->reply)
client->reply = g_byte_array_new();
if (client->reply->len < 4) {
/* Continue reading the size */
rc = metautils_syscall_read(client->fd, d, (4 - client->reply->len));
if (rc < 0)
return (errno == EINTR || errno == EAGAIN) ? NULL :
NEWERROR(errno, "read error (%s)", strerror(errno));
if (rc > 0)
g_byte_array_append(client->reply, d, rc);
if (client->reply->len < 4) {
if (!rc)
return NEWERROR(errno, "EOF!");
return NULL;
}
}
EXTRA_ASSERT (client->reply->len == 4);
s32 = *((guint32*)(client->reply->data));
client->size = g_ntohl(s32);
case REP_READING_DATA:
client->step = REP_READING_DATA;
rc = 0;
EXTRA_ASSERT (client->reply->len <= client->size + 4);
if (client->reply->len < client->size + 4) {
gsize remaiming = client->size + 4 - client->reply->len;
gsize dmax = ds;
if (dmax > remaiming)
dmax = remaiming;
rc = metautils_syscall_read(client->fd, d, dmax);
if (rc < 0)
return (errno == EINTR || errno == EAGAIN) ? NULL :
NEWERROR(errno, "read error (%s)", strerror(errno));
if (rc > 0)
g_byte_array_append(client->reply, d, rc);
}
EXTRA_ASSERT (client->reply->len <= client->size + 4);
if (client->reply->len == client->size + 4) {
GError *err = _client_manage_reply_data(client);
if (err) {
client->step = STATUS_FAILED;
return err;
}
else {
if (client->step != CONNECTING && client->step != STATUS_FAILED
&& client->step != STATUS_OK) {
client->reply = g_byte_array_set_size(client->reply, 0);
client->step = REP_READING_SIZE;
client->size = 0;
}
}
}
else if (!rc)
return NEWERROR(errno, "EOF!");
return NULL;
default:
g_assert_not_reached();
return NEWERROR(0, "Invalid state");
}
g_assert_not_reached();
return NEWERROR(0, "BUG unreachable code");
}
