void RequestHandler::handling_thread(g_message* _request) {
// wrap in local for auto-delete
g_local < g_message > request(_request);
// read parameters
g_pid requester_pid = g_get_pid_for_tid(request()->sender);
g_fd requesters_output = request()->parameterA;
g_fd requesters_input = request()->parameterB;
g_pid my_pid = g_get_pid();
// register a name
std::stringstream namestr;
namestr << "windowserver:handler@";
namestr << requester_pid;
g_task_register_id(namestr.str().c_str());
// clone pipe ends
g_fs_clonefd_status clone_input_status;
g_fd requester_out = g_clone_fd_s(requesters_input, requester_pid, my_pid, &clone_input_status);
if (clone_input_status != G_FS_CLONEFD_SUCCESSFUL) {
g_logger::log("unable to clone input file descriptor (%i in process %i) on open request (status: %i)", requesters_input, requester_pid,
clone_input_status);
return;
}
g_fs_clonefd_status clone_output_status;
g_fd requester_in = g_clone_fd_s(requesters_output, requester_pid, my_pid, &clone_output_status);
if (clone_output_status != G_FS_CLONEFD_SUCCESSFUL) {
g_logger::log("unable to clone output file descriptor (%i in process %i) on open request (status: %i)", requesters_input, requester_pid,
clone_output_status);
return;
}
// send response
g_message_empty (response);
response.type = G_UI_COMMAND_OPEN_RESPONSE;
response.topic = request()->topic;
g_send_msg(request()->sender, &response);
// add process
add_process(requester_pid, requester_out, requester_in);
// start event dispatch thread
g_create_thread((void*) &event_dispatch_thread);
while (true) {
// read transaction id
uint32_t idlen = sizeof(g_ui_transaction_id);
uint8_t id[idlen];
g_read(requester_in, id, idlen);
g_ui_transaction_id transaction = *((g_ui_transaction_id*) id);
// read length
uint32_t lenlen = sizeof(uint32_t);
uint8_t len[lenlen];
g_read(requester_in, len, lenlen);
uint32_t length = *((uint32_t*) len);
// read data
// TODO limit data
uint8_t* data = new uint8_t[length];
int32_t rd = 0;
while (rd < length) {
rd += g_read(requester_in, &data[rd], length - rd);
}
g_value_placer data_reader(data);
// handle command
g_ui_protocol_command_id command = data_reader.get<g_ui_protocol_command_id>();
if (command == G_UI_PROTOCOL_CREATE_WINDOW) {
uint32_t window_id;
g_ui_protocol_status status = createWindow(&window_id);
// write response
uint32_t response_len = G_UI_PROTOCOL_HEADER_LENGTH + G_UI_PROTOCOL_CREATE_WINDOW_RESPONSE_LENGTH;
g_local < uint8_t > response(new uint8_t[response_len]);
g_value_placer response_writer(response());
response_writer.put(G_UI_PROTOCOL_CREATE_WINDOW);
response_writer.put(status);
response_writer.put(window_id);
send(requester_out, transaction, response(), response_len);
} else if (command == G_UI_PROTOCOL_SET_VISIBLE) {
uint32_t component_id = data_reader.get<uint32_t>();
bool visible = data_reader.get<uint8_t>();
// handle command
g_ui_protocol_status status = setVisible(component_id, visible);
// write response
uint32_t response_len = G_UI_PROTOCOL_HEADER_LENGTH + G_UI_PROTOCOL_SET_VISIBLE_RESPONSE_LENGTH;
g_local < uint8_t > response(new uint8_t[response_len]);
g_value_placer response_writer(response());
response_writer.put(G_UI_PROTOCOL_SET_VISIBLE);
response_writer.put(status);
send(requester_out, transaction, response(), response_len);
} else if (command == G_UI_PROTOCOL_CREATE_COMPONENT) {
uint32_t component_type = data_reader.get<uint32_t>();
// handle command
uint32_t component_id;
g_ui_protocol_status status = createComponent(component_type, &component_id);
// write response
uint32_t response_length = G_UI_PROTOCOL_HEADER_LENGTH + G_UI_PROTOCOL_CREATE_COMPONENT_RESPONSE_LENGTH;
g_local < uint8_t > response(new uint8_t[response_length]);
g_value_placer response_writer(response());
response_writer.put(G_UI_PROTOCOL_CREATE_COMPONENT);
response_writer.put(status);
response_writer.put(component_id);
send(requester_out, transaction, response(), response_length);
} else if (command == G_UI_PROTOCOL_ADD_COMPONENT) {
uint32_t parent_id = data_reader.get<uint32_t>();
uint32_t child_id = data_reader.get<uint32_t>();
// handle command
g_ui_protocol_status status = addComponent(parent_id, child_id);
// write response
uint32_t response_length = G_UI_PROTOCOL_HEADER_LENGTH + G_UI_PROTOCOL_ADD_COMPONENT_RESPONSE_LENGTH;
g_local < uint8_t > response(new uint8_t[response_length]);
g_value_placer response_writer(response());
response_writer.put(G_UI_PROTOCOL_ADD_COMPONENT);
response_writer.put(status);
send(requester_out, transaction, response(), response_length);
} else if (command == G_UI_PROTOCOL_SET_TITLE) {
uint32_t component_id = data_reader.get<uint32_t>();
uint32_t title_length = data_reader.get<uint32_t>();
g_local<char> title(new char[title_length]);
data_reader.get((uint8_t*) title(), title_length);
// handle command
g_ui_protocol_status status = setTitle(component_id, title());
// write response
uint32_t response_length = G_UI_PROTOCOL_HEADER_LENGTH + G_UI_PROTOCOL_SET_TITLE_RESPONSE_LENGTH;
g_local < uint8_t > response(new uint8_t[response_length]);
g_value_placer response_writer(response());
response_writer.put(G_UI_PROTOCOL_SET_TITLE);
response_writer.put(status);
send(requester_out, transaction, response(), response_length);
} else if (command == G_UI_PROTOCOL_GET_TITLE) {
uint32_t component_id = data_reader.get<uint32_t>();
// handle command
std::string title;
g_ui_protocol_status status = getTitle(component_id, title);
int title_length = title.length() + 1;
// write response
uint32_t response_length = G_UI_PROTOCOL_HEADER_LENGTH + G_UI_PROTOCOL_GET_TITLE_RESPONSE_LENGTH + title_length;
g_local < uint8_t > response(new uint8_t[response_length]);
g_value_placer response_writer(response());
response_writer.put(G_UI_PROTOCOL_GET_TITLE);
response_writer.put(status);
response_writer.put(title_length);
response_writer.put((uint8_t*) title.c_str(), title_length);
send(requester_out, transaction, response(), response_length);
} else if (command == G_UI_PROTOCOL_SET_BOUNDS) {
uint32_t component_id = data_reader.get<uint32_t>();
int32_t x = data_reader.get<int32_t>();
int32_t y = data_reader.get<int32_t>();
int32_t width = data_reader.get<int32_t>();
int32_t height = data_reader.get<int32_t>();
// handle command
g_ui_protocol_status status = setBounds(component_id, x, y, width, height);
// write response
uint32_t response_length = G_UI_PROTOCOL_HEADER_LENGTH + G_UI_PROTOCOL_SET_BOUNDS_RESPONSE_LENGTH;
g_local < uint8_t > response(new uint8_t[response_length]);
g_value_placer response_writer(response());
response_writer.put(G_UI_PROTOCOL_SET_BOUNDS);
response_writer.put(status);
send(requester_out, transaction, response(), response_length);
} else if (command == G_UI_PROTOCOL_SET_ACTION_LISTENER) {
uint32_t component_id = data_reader.get<uint32_t>();
// handle command
uint32_t listener_id;
g_ui_protocol_status status = setActionListener(requester_pid, component_id, &listener_id);
// write response
uint32_t response_length = G_UI_PROTOCOL_HEADER_LENGTH + G_UI_PROTOCOL_SET_ACTION_LISTENER;
g_local < uint8_t > response(new uint8_t[response_length]);
g_value_placer response_writer(response());
response_writer.put<g_ui_protocol_command_id>(G_UI_PROTOCOL_SET_ACTION_LISTENER);
response_writer.put<g_ui_protocol_status>(status);
response_writer.put<uint32_t>(listener_id);
send(requester_out, transaction, response(), response_length);
}
}
// TODO close all windows
// TODO remove listeners
remove_process(requester_pid);
}
/**
* Opens a connection to the window server.
*/
g_ui_open_status g_ui::open() {
// check if already open
if (g_ui_ready) {
return G_UI_OPEN_STATUS_EXISTING;
}
// get window managers id
g_tid window_mgr = g_task_get_id(G_WINDOW_MANAGER_IDENTIFIER);
if (window_mgr == -1) {
g_logger::log("failed to retrieve task id of window server");
return G_UI_OPEN_STATUS_COMMUNICATION_FAILED;
}
// open in/out pipes
g_fs_pipe_status status;
g_fd g_ui_channel_out_read;
g_pipe_s(&g_ui_channel_out, &g_ui_channel_out_read, &status);
g_fd g_ui_channel_in_write;
g_pipe_s(&g_ui_channel_in_write, &g_ui_channel_in, &status);
if (status == G_FS_PIPE_ERROR) {
g_logger::log("failed to open UI communication pipe");
return G_UI_OPEN_STATUS_COMMUNICATION_FAILED;
}
// tell window manager to open
uint32_t topic = g_ipc_next_topic();
g_message_empty(open_request);
open_request.type = G_UI_COMMAND_OPEN_REQUEST;
open_request.topic = topic;
open_request.parameterA = g_ui_channel_out_read;
open_request.parameterB = g_ui_channel_in_write;
auto request_status = g_send_msg(window_mgr, &open_request);
if (request_status != G_MESSAGE_SEND_STATUS_SUCCESSFUL) {
g_logger::log("failed to send UI-open request to window server");
return G_UI_OPEN_STATUS_COMMUNICATION_FAILED;
}
// wait for response
g_message_empty(open_response);
auto response_status = g_recv_topic_msg(g_get_tid(), topic, &open_response);
if (response_status != G_MESSAGE_RECEIVE_STATUS_SUCCESSFUL) {
g_logger::log("failed to receive UI-open response from window server");
return G_UI_OPEN_STATUS_COMMUNICATION_FAILED;
}
// check response message
if (open_response.type != G_UI_COMMAND_OPEN_RESPONSE) {
g_logger::log("window servers UI-open response was not a proper 'opened'-response");
return G_UI_OPEN_STATUS_COMMUNICATION_FAILED;
}
// start asynchronous receiver
g_create_thread((void*) &asynchronous_receiver_thread);
g_create_thread((void*) &event_dispatch_thread);
// mark UI as ready
g_logger::log("successfully opened UI in window server");
g_ui_ready = true;
return G_UI_OPEN_STATUS_SUCCESSFUL;
}