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109 lines
2.5 KiB
C++
109 lines
2.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/********************************************
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DISCLAIMER:
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This is a wrapper code to mimic the relevant std:: class
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Please use it ONLY when porting an existing code e.g. from the original sources
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For all new development please use classes from Common::
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*********************************************/
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#ifndef COMMON_STD_CHRONO_H
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#define COMMON_STD_CHRONO_H
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#include "common/system.h"
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namespace Std {
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namespace chrono {
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class duration {
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private:
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uint32 _value;
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public:
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duration() : _value(0) {
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}
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duration(uint32 value) : _value(value) {
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}
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size_t count() const {
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// durations for ScummVM are hardcoded to be in milliseconds
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return 1000;
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}
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operator uint32() const {
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return _value;
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}
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inline bool operator>=(const duration &rhs) const {
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return _value >= rhs._value;
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}
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};
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class milliseconds : public duration {
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public:
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milliseconds() : duration(0) {}
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milliseconds(uint32 val) : duration(val) {}
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static milliseconds zero() {
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return milliseconds();
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}
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};
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class microseconds : public duration {
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public:
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microseconds() : duration(0) {}
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microseconds(long val) : duration(val / 1000) {}
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};
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struct system_clock {
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};
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struct steady_clock { // wraps QueryPerformanceCounter
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using rep = uint32;
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using period = milliseconds;
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using duration = milliseconds;
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using time_point = uint32;
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static constexpr bool is_steady = true;
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static time_point now() { // get current time
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return g_system->getMillis();
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}
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};
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using high_resolution_clock = steady_clock;
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template<class T>
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duration duration_cast(T param);
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template<class T>
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duration duration_cast(T param) {
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return duration(param);
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}
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} // namespace chrono
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} // namespace Std
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#endif
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