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/* |
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* The ManaPlus Client |
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* Copyright (C) 2011-2019 The ManaPlus Developers |
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* Copyright (C) 2019-2021 Andrei Karas |
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* |
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* This file is part of The ManaPlus Client. |
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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 2 of the License, or |
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* 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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#include "utils/timer.h" |
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#include "const/utils/timer.h" |
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PRAGMA48(GCC diagnostic push) |
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PRAGMA48(GCC diagnostic ignored "-Wshadow") |
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#include <SDL_timer.h> |
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PRAGMA48(GCC diagnostic pop) |
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#include <climits> |
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#include "debug.h" |
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namespace |
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{ |
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#ifdef USE_SDL2 |
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SDL_TimerID mLogicCounterId(0); |
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SDL_TimerID mSecondsCounterId(0); |
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#else // USE_SDL2 |
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SDL_TimerID mLogicCounterId(nullptr); |
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SDL_TimerID mSecondsCounterId(nullptr); |
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#endif // USE_SDL2 |
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} // namespace |
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/** |
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* Tells the max tick value, |
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* setting it back to zero (and start again). |
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*/ |
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static const int MAX_TICK_VALUE = INT_MAX / 2; |
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volatile int tick_time; /**< Tick counter */ |
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volatile int fps = 0; /**< Frames counted in the last second */ |
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volatile int lps = 0; /**< Logic processed per second */ |
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volatile int frame_count = 0; /**< Counts the frames during one second */ |
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volatile int logic_count = 0; /**< Counts the logic during one second */ |
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volatile time_t cur_time = 0; |
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static uint32_t nextTick(uint32_t interval, void *param A_UNUSED); |
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static uint32_t nextSecond(uint32_t interval, void *param A_UNUSED); |
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/** |
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* Advances game logic counter. |
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* Called every 10 milliseconds by SDL_AddTimer() |
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* @see MILLISECONDS_IN_A_TICK value |
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*/ |
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static uint32_t nextTick(uint32_t interval, void *param A_UNUSED) |
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{ |
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tick_time = tick_time + 1; |
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if (tick_time == MAX_TICK_VALUE) |
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tick_time = 0; |
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return interval; |
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} |
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/** |
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* Updates fps. |
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* Called every seconds by SDL_AddTimer() |
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*/ |
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static uint32_t nextSecond(uint32_t interval, void *param A_UNUSED) |
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{ |
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fps = frame_count; |
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lps = logic_count; |
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frame_count = 0; |
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logic_count = 0; |
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return interval; |
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} |
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/** |
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* @return the elapsed time in milliseconds |
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* between two tick values. |
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*/ |
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int get_elapsed_time(const int startTime) |
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{ |
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const int time = tick_time; |
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✓✓ |
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if (startTime <= time) |
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{ |
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return (time - startTime) * MILLISECONDS_IN_A_TICK; |
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} |
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return (time + (MAX_TICK_VALUE - startTime)) |
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* MILLISECONDS_IN_A_TICK; |
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} |
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int get_elapsed_time1(const int startTime) |
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{ |
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const int time = tick_time; |
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✓✓ |
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if (startTime <= time) |
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return time - startTime; |
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return time + (MAX_TICK_VALUE - startTime); |
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} |
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void startTimers() |
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{ |
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// Initialize logic and seconds counters |
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tick_time = 0; |
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mLogicCounterId = SDL_AddTimer(MILLISECONDS_IN_A_TICK, nextTick, nullptr); |
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mSecondsCounterId = SDL_AddTimer(1000, nextSecond, nullptr); |
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} |
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void stopTimers() |
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{ |
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SDL_RemoveTimer(mLogicCounterId); |
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SDL_RemoveTimer(mSecondsCounterId); |
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} |