Files
scylladb/service/query_state.hh
Nadav Har'El 548386a0bb treewide: reduce include of cql_statement.hh
ClangBuildAnalyzer reports cql3/cql_statement.hh as being one of the
most expensive header files in the project - being included (mostly
indirectly) in 129 source files, and costing a total of 844 CPU seconds
of compilation.

This patch is an attempt, only *partially* successful, to reduce the
number of times that cql_statement.hh is included. It succeeds in
lowering the number 129 to 99, but not less :-( One of the biggest
difficulties in reducing it further is that query_processor.hh includes
a lot of templated code, which needs stuff from cql_statement.hh.
The solution should be to un-template the functions in
query_processor.hh and move them from the header to a source file, but
this is beyond the scope of this patch and query_processor.hh appears
problematic in other respects as well.

Unfortunately the compilation speedup by this patch is negligible
(the `du -bc build/dev/**/*.o` metric shows less than 0.01% reduction).
Beyond the fact that this patch only removes 30% of the inclusions of
this header, it appears that most of the source files that no longer
include cql_statement.hh after this patch, included anyway many of the
other headers that cql_statement.hh included, so the saving is minimal.

Signed-off-by: Nadav Har'El <nyh@scylladb.com>

Closes #15212
2023-09-08 13:23:50 +03:00

77 lines
1.7 KiB
C++

/*
* Copyright (C) 2015-present ScyllaDB
*/
/*
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#ifndef SERVICE_QUERY_STATE_HH
#define SERVICE_QUERY_STATE_HH
#include "service/client_state.hh"
#include "tracing/tracing.hh"
#include "service_permit.hh"
namespace qos {
class service_level_controller;
}
namespace service {
class query_state final {
private:
client_state& _client_state;
tracing::trace_state_ptr _trace_state_ptr;
service_permit _permit;
public:
query_state(client_state& client_state, service_permit permit)
: _client_state(client_state)
, _trace_state_ptr(tracing::trace_state_ptr())
, _permit(std::move(permit))
{}
query_state(client_state& client_state, tracing::trace_state_ptr trace_state_ptr, service_permit permit)
: _client_state(client_state)
, _trace_state_ptr(std::move(trace_state_ptr))
, _permit(std::move(permit))
{ }
const tracing::trace_state_ptr& get_trace_state() const {
return _trace_state_ptr;
}
tracing::trace_state_ptr& get_trace_state() {
return _trace_state_ptr;
}
client_state& get_client_state() {
return _client_state;
}
const client_state& get_client_state() const {
return _client_state;
}
api::timestamp_type get_timestamp() {
return _client_state.get_timestamp();
}
service_permit get_permit() const& {
return _permit;
}
service_permit&& get_permit() && {
return std::move(_permit);
}
qos::service_level_controller& get_service_level_controller() const {
return _client_state.get_service_level_controller();
}
};
}
#endif