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-rw-r--r--src/core/hle/shared_page.cpp57
1 files changed, 57 insertions, 0 deletions
diff --git a/src/core/hle/shared_page.cpp b/src/core/hle/shared_page.cpp
index 2a1caeaac..4d9272923 100644
--- a/src/core/hle/shared_page.cpp
+++ b/src/core/hle/shared_page.cpp
@@ -2,8 +2,11 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
+#include <chrono>
#include <cstring>
+#include <ctime>
+#include "core/core_timing.h"
#include "core/hle/shared_page.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -12,6 +15,57 @@ namespace SharedPage {
SharedPageDef shared_page;
+static int update_time_event;
+
+/// Gets system time in 3DS format. The epoch is Jan 1900, and the unit is millisecond.
+static u64 GetSystemTime() {
+ auto now = std::chrono::system_clock::now();
+
+ // 3DS system does't allow user to set a time before Jan 1 2000,
+ // so we use it as an auxiliary epoch to calculate the console time.
+ std::tm epoch_tm;
+ epoch_tm.tm_sec = 0;
+ epoch_tm.tm_min = 0;
+ epoch_tm.tm_hour = 0;
+ epoch_tm.tm_mday = 1;
+ epoch_tm.tm_mon = 0;
+ epoch_tm.tm_year = 100;
+ epoch_tm.tm_isdst = 0;
+ auto epoch = std::chrono::system_clock::from_time_t(std::mktime(&epoch_tm));
+
+ // 3DS console time uses Jan 1 1900 as internal epoch,
+ // so we use the milliseconds between 1900 and 2000 as base console time
+ u64 console_time = 3155673600000ULL;
+
+ // Only when system time is after 2000, we set it as 3DS system time
+ if (now > epoch) {
+ console_time += std::chrono::duration_cast<std::chrono::milliseconds>(now - epoch).count();
+ }
+
+ // If the system time is in daylight saving, we give an additional hour to console time
+ std::time_t now_time_t = std::chrono::system_clock::to_time_t(now);
+ std::tm* now_tm = std::localtime(&now_time_t);
+ if (now_tm && now_tm->tm_isdst > 0)
+ console_time += 60 * 60 * 1000;
+
+ return console_time;
+}
+
+static void UpdateTimeCallback(u64 userdata, int cycles_late) {
+ DateTime& date_time = shared_page.date_time_counter % 2 ?
+ shared_page.date_time_0 : shared_page.date_time_1;
+
+ date_time.date_time = GetSystemTime();
+ date_time.update_tick = CoreTiming::GetTicks();
+ date_time.tick_to_second_coefficient = g_clock_rate_arm11;
+ date_time.tick_offset = 0;
+
+ ++shared_page.date_time_counter;
+
+ // system time is updated hourly
+ CoreTiming::ScheduleEvent(msToCycles(60 * 60 * 1000) - cycles_late, update_time_event);
+}
+
void Init() {
std::memset(&shared_page, 0, sizeof(shared_page));
@@ -19,6 +73,9 @@ void Init() {
// Some games wait until this value becomes 0x1, before asking running_hw
shared_page.unknown_value = 0x1;
+
+ update_time_event = CoreTiming::RegisterEvent("SharedPage::UpdateTimeCallback", UpdateTimeCallback);
+ CoreTiming::ScheduleEvent(0, update_time_event);
}
} // namespace