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Use query interface for void returning X requests

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This commit is contained in:
Murat
2020-08-04 18:17:15 +02:00
parent 13205a9d11
commit 54ee71a46a
3 changed files with 122 additions and 23 deletions
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41
libsrc/grabber/xcb/XcbCommandExecutor.h
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@@ -4,27 +4,46 @@
#include <xcb/xcb.h>
template<class Request, class ...Args>
std::unique_ptr<typename Request::ResponseType, decltype(&free)>
query(xcb_connection_t * connection, Args&& ...args)
void check_error(xcb_generic_error_t * error)
{
auto cookie = Request::RequestFunction(connection,args...);
xcb_generic_error_t * error = nullptr;
std::unique_ptr<typename Request::ResponseType, decltype(&free)> xcbResponse(
Request::ReplyFunction(connection, cookie, &error), free);
if (error) {
Logger * LOGGER = Logger::getInstance("XCB");
Error(LOGGER,
"Cannot get the image data event_error: response_type:%u error_code:%u "
"XCB request failed, event_error: response_type:%u error_code:%u "
"sequence:%u resource_id:%u minor_code:%u major_code:%u.\n",
error->response_type, error->error_code, error->sequence,
error->resource_id, error->minor_code, error->major_code);
free(error);
return {nullptr, nullptr};
}
}
// Requests with void response type
template<class Request, class ...Args>
typename std::enable_if<std::is_same<typename Request::ResponseType, xcb_void_cookie_t>::value, void>::type
query(xcb_connection_t * connection, Args&& ...args)
{
auto cookie = Request::RequestFunction(connection, std::forward<Args>(args)...);
xcb_generic_error_t * error = Request::ReplyFunction(connection, cookie);
check_error(error);
}
// Requests with non-void response type
template<class Request, class ...Args>
typename std::enable_if<!std::is_same<typename Request::ResponseType, xcb_void_cookie_t>::value,
std::unique_ptr<typename Request::ResponseType, decltype(&free)>>::type
query(xcb_connection_t * connection, Args&& ...args)
{
auto cookie = Request::RequestFunction(connection, std::forward<Args>(args)...);
xcb_generic_error_t * error = nullptr;
std::unique_ptr<typename Request::ResponseType, decltype(&free)> xcbResponse(
Request::ReplyFunction(connection, cookie, &error), free);
check_error(error);
return xcbResponse;
}