void *
rut_memory_stack_alloc (RutMemoryStack *stack, size_t bytes)
{
RutMemorySubStack *sub_stack;
void *ret;
sub_stack = stack->sub_stack;
if (G_LIKELY (sub_stack->bytes - stack->sub_stack_offset >= bytes))
{
ret = sub_stack->data + stack->sub_stack_offset;
stack->sub_stack_offset += bytes;
return ret;
}
/* If the stack has been rewound and then a large initial allocation
* is made then we may need to skip over one or more of the
* sub-stacks that are too small for the requested allocation
* size...
*
* XXX: note we don't use rut_list_for_each here because we need to be
* careful to iterate the list starting from our current position, but
* stopping if we loop back to the first sub_stack. (NB: A RutList
* is a circular list)
*/
for (sub_stack = rut_container_of (stack->sub_stack->list_node.next,
sub_stack, list_node);
&sub_stack->list_node != &stack->sub_stacks;
sub_stack = rut_container_of (sub_stack->list_node.next,
sub_stack, list_node))
{
if (sub_stack->bytes >= bytes)
{
ret = sub_stack->data;
stack->sub_stack = sub_stack;
stack->sub_stack_offset = bytes;
return ret;
}
}
/* Finally if we couldn't find a free sub-stack with enough space
* for the requested allocation we allocate another sub-stack that's
* twice as big as the last sub-stack or twice as big as the
* requested allocation if that's bigger.
*/
sub_stack = rut_container_of (stack->sub_stacks.prev,
sub_stack,
list_node);
rut_memory_stack_add_sub_stack (stack, MAX (sub_stack->bytes, bytes) * 2);
sub_stack = rut_container_of (stack->sub_stacks.prev,
sub_stack,
list_node);
stack->sub_stack_offset += bytes;
return sub_stack->data;
}
void
rut_memory_stack_rewind (RutMemoryStack *stack)
{
stack->sub_stack = rut_container_of (stack->sub_stacks.next,
stack->sub_stack,
list_node);
stack->sub_stack_offset = 0;
}
static void
on_address_resolved(uv_getaddrinfo_t *resolver,
int status,
struct addrinfo *result)
{
rig_pb_stream_t *stream = rut_container_of(resolver, stream, resolver);
uv_loop_t *loop = rut_uv_shell_get_loop(stream->shell);
char ip_address[17] = {'\0'};
c_return_if_fail(stream->resolving);
if (status < 0) {
c_warning("Failed to resolve slave address \"%s\": %s",
stream->hostname, uv_strerror(status));
rut_closure_list_invoke(&stream->on_error_closures,
rig_pb_stream_callback_t,
stream);
/* NB: we were at least keeping the stream alive while
* waiting for the resolve request to finish... */
stream->resolving = false;
rut_object_unref(stream);
return;
}
uv_ip4_name((struct sockaddr_in*)result->ai_addr, ip_address, 16);
c_message("stream: Resolved address of \"%s\" = %s",
stream->hostname, ip_address);
uv_tcp_init(loop, &stream->tcp.socket);
stream->tcp.socket.data = stream;
/* NB: we took a reference to keep the stream alive while
* resolving the address, so conceptually we are now handing
* the reference over to keep the stream alive while waiting
* for it to connect... */
stream->resolving = false;
stream->connecting = true;
stream->connection_request.data = stream;
uv_tcp_connect(&stream->connection_request,
&stream->tcp.socket,
result->ai_addr,
on_connect);
uv_freeaddrinfo(result);
}
