kopia lustrzana https://github.com/f4exb/sdrangel
85 wiersze
2.7 KiB
C++
85 wiersze
2.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2018 Edouard Griffiths, F4EXB. //
|
|
// //
|
|
// This program 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 as version 3 of the License, or //
|
|
// //
|
|
// 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 V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef SDRBASE_UTIL_LIMITEDCOUNTER_H_
|
|
#define SDRBASE_UTIL_LIMITEDCOUNTER_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
template<typename StoreType, uint32_t Limit>
|
|
class LimitedCounter
|
|
{
|
|
public:
|
|
LimitedCounter() :
|
|
m_counter(0)
|
|
{}
|
|
|
|
LimitedCounter(StoreType value) :
|
|
m_counter(value < Limit ? value : Limit - 1)
|
|
{}
|
|
|
|
void operator=(const LimitedCounter& rhs) {
|
|
m_counter = rhs.m_counter;
|
|
}
|
|
|
|
LimitedCounter& operator++() {
|
|
m_counter++;
|
|
if (m_counter >= Limit) {
|
|
m_counter = 0;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
LimitedCounter operator++(int) {
|
|
LimitedCounter temp = *this ;
|
|
m_counter++;
|
|
if (m_counter >= Limit) {
|
|
m_counter = 0;
|
|
}
|
|
return temp;
|
|
}
|
|
|
|
LimitedCounter& operator+=(const uint32_t rhs) {
|
|
m_counter += rhs;
|
|
if (m_counter >= Limit) {
|
|
m_counter -= Limit;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
StoreType value() const { return m_counter; }
|
|
|
|
friend LimitedCounter operator-(const LimitedCounter lhs, const LimitedCounter& rhs)
|
|
{
|
|
LimitedCounter result;
|
|
|
|
if (lhs.m_counter < rhs.m_counter) {
|
|
result.m_counter = Limit - lhs.m_counter + rhs.m_counter + 1;
|
|
} else {
|
|
result.m_counter = lhs.m_counter - rhs.m_counter;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
private:
|
|
StoreType m_counter;
|
|
};
|
|
|
|
|
|
|
|
#endif /* SDRBASE_UTIL_LIMITEDCOUNTER_H_ */
|