Kernel: Implement Time Manager.

src/core/hle/kernel/time_manager.cpp

@@ -0,0 +1,42 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/core.h"
+#include "core/core_timing.h"
+#include "core/core_timing_util.h"
+#include "core/hle/kernel/handle_table.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/thread.h"
+#include "core/hle/kernel/time_manager.h"
+
+namespace Kernel {
+
+TimeManager::TimeManager(Core::System& system) : system{system} {
+    time_manager_event_type = Core::Timing::CreateEvent(
+        "Kernel::TimeManagerCallback", [this](u64 thread_handle, [[maybe_unused]] s64 cycles_late) {
+            Handle proper_handle = static_cast<Handle>(thread_handle);
+            std::shared_ptr<Thread> thread =
+                this->system.Kernel().RetrieveThreadFromGlobalHandleTable(proper_handle);
+            thread->ResumeFromWait();
+        });
+}
+
+void TimeManager::ScheduleTimeEvent(Handle& event_handle, Thread* timetask, s64 nanoseconds) {
+    if (nanoseconds > 0) {
+        ASSERT(timetask);
+        event_handle = timetask->GetGlobalHandle();
+        const s64 cycles = Core::Timing::nsToCycles(std::chrono::nanoseconds{nanoseconds});
+        system.CoreTiming().ScheduleEvent(cycles, time_manager_event_type, event_handle);
+    } else {
+        event_handle = InvalidHandle;
+    }
+}
+
+void TimeManager::UnscheduleTimeEvent(Handle event_handle) {
+    if (event_handle != InvalidHandle) {
+        system.CoreTiming().UnscheduleEvent(time_manager_event_type, event_handle);
+    }
+}
+
+} // namespace Kernel