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Mimic atomic behavior of update to future-proof

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This commit is contained in:
Ryan Loebs 2016-04-29 04:06:27 -07:00
parent a5c13e07cd
commit 89e65d36ff
1 changed files with 5 additions and 2 deletions
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7
src/core/hle/shared_page.cpp
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@ -33,18 +33,21 @@ void Init() {
} }
static void UpdateTimeCallback(u64 /*userdata*/, int /*cycles_late*/) { static void UpdateTimeCallback(u64 /*userdata*/, int /*cycles_late*/) {
shared_page.date_time_update_counter++; u32_le next_count = shared_page.date_time_update_counter + 1;
// 3DS uses 1/1/1900 for Epoch // 3DS uses 1/1/1900 for Epoch
time_t plat_time = std::time(nullptr); time_t plat_time = std::time(nullptr);
u64_le console_time = (static_cast<u64_le>(plat_time) + _3DS_EPOCH_OFFSET) * 1000L; u64_le console_time = (static_cast<u64_le>(plat_time) + _3DS_EPOCH_OFFSET) * 1000L;
DateTime* current_time = (shared_page.date_time_update_counter & 1) ? &shared_page.date_time_1 : &shared_page.date_time_0; DateTime* current_time = (next_count & 1) ? &shared_page.date_time_1 : &shared_page.date_time_0;
current_time->date_time = console_time; current_time->date_time = console_time;
current_time->tick_rate = (u64_le)CoreTiming::GetClockFrequency(); current_time->tick_rate = (u64_le)CoreTiming::GetClockFrequency();
current_time->update_tick = CoreTiming::GetTicks(); current_time->update_tick = CoreTiming::GetTicks();
// update after changing the opposite time structure to keep updates atomic
shared_page.date_time_update_counter = next_count;
// run again in an hour // run again in an hour
CoreTiming::ScheduleEvent((u64_le)CoreTiming::GetClockFrequency() * 3600ULL, update_time_event); CoreTiming::ScheduleEvent((u64_le)CoreTiming::GetClockFrequency() * 3600ULL, update_time_event);
} }