mirror of
https://github.com/isledecomp/isle-portable.git
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74 lines
1.7 KiB
C++
74 lines
1.7 KiB
C++
#pragma once
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#include <SDL2/SDL.h>
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#include <SDL2/SDL_timer.h>
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#include <SDL2/SDL_mutex.h>
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#include <map>
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// https://wiki.libsdl.org/SDL3/README-migration#sdl_timerh
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// https://wiki.libsdl.org/SDL3/README-migration#sdl_timerh | SDL_GetTicksNS()
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#define SDL_GetTicksNS SDL_GetTicks
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// time is in miliseconds not nanoseconds
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#define SDL_NS_TO_MS(MS) (MS)
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typedef Uint32 SDL3_TimerCallback(void* userdata, SDL_TimerID timerID, Uint32 interval);
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struct SDL2TimerShimData {
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SDL3_TimerCallback* callback;
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void* userdata;
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SDL_TimerID id;
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};
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inline std::map<SDL_TimerID, SDL2TimerShimData*> g_timers;
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inline SDL_mutex* g_timerMutex = SDL_CreateMutex();
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inline Uint32 shim_timer_callback(Uint32 interval, void* param)
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{
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auto* shim = static_cast<SDL2TimerShimData*>(param);
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const Uint32 next = shim->callback(shim->userdata, shim->id, interval);
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if (next == 0) {
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SDL_LockMutex(g_timerMutex);
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g_timers.erase(shim->id);
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SDL_free(shim);
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SDL_UnlockMutex(g_timerMutex);
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}
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return next;
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}
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inline SDL_TimerID SDL_AddTimer(Uint32 interval, SDL3_TimerCallback* callback, void* userdata)
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{
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auto* shim = static_cast<SDL2TimerShimData*>(SDL_malloc(sizeof(SDL2TimerShimData)));
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shim->callback = callback;
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shim->userdata = userdata;
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const SDL_TimerID id = ::SDL_AddTimer(interval, shim_timer_callback, shim);
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if (id == 0) {
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SDL_free(shim);
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return 0;
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}
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shim->id = id;
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SDL_LockMutex(g_timerMutex);
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g_timers[id] = shim;
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SDL_UnlockMutex(g_timerMutex);
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return id;
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}
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inline SDL_bool SDL_RemoveTimer2(SDL_TimerID id)
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{
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SDL_LockMutex(g_timerMutex);
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if (const auto it = g_timers.find(id); it != g_timers.end()) {
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SDL_free(it->second);
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g_timers.erase(it);
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}
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SDL_UnlockMutex(g_timerMutex);
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return ::SDL_RemoveTimer(id);
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}
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#define SDL_RemoveTimer SDL_RemoveTimer2
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