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DictSlotsRef.h
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DictSlotsRef.h
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//+------------------------------------------------------------------+
//| EA31337 framework |
//| Copyright 2016-2023, EA31337 Ltd |
//| https://github.com/EA31337 |
//+------------------------------------------------------------------+
/*
* This file is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/**
* @file
* DictSlotsRef struct.
*/
#ifndef __MQL__
// Allows the preprocessor to include a header file when it is needed.
#pragma once
#endif
// Includes.
#include "Array.mqh"
#include "Dict.enum.h"
#include "DictSlot.mqh"
#include "Std.h"
#include "Util.h"
template <typename K, typename V>
class DictSlot;
template <typename K, typename V>
struct DictSlotsRef {
ARRAY(DictSlot<K _COMMA V>, DictSlots);
// Incremental index for dict operating in list mode.
int _list_index;
int _num_used;
int _num_conflicts;
float _avg_conflicts;
DictSlotsRef() {
_list_index = 0;
_num_used = 0;
_num_conflicts = 0;
_avg_conflicts = 0;
}
void operator=(DictSlotsRef& r) {
Util::ArrayCopy(DictSlots, r.DictSlots);
_list_index = r._list_index;
_num_used = r._num_used;
_num_conflicts = r._num_conflicts;
_avg_conflicts = r._avg_conflicts;
}
/**
* Adds given number of conflicts for an insert action, so we can store average number of conflicts.
*/
void AddConflicts(int num) {
if (num != 0) {
_avg_conflicts += (float)num / (float)++_num_conflicts;
}
}
/**
* Checks whethere there is no performance problems with slots.
*/
bool IsPerformant() { return _avg_conflicts < DICT_PERFORMANCE_PROBLEM_AVG_CONFLICTS; }
};