os: implement Tick api, make build with -Werror

libraries/libstratosphere/source/os/impl/os_tick_manager_impl.hpp

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+#ifdef ATMOSPHERE_OS_HORIZON
+    #include "os_tick_manager_impl.os.horizon.hpp"
+#else
+    #error "Unknown OS for TickManagerImpl"
+#endif
+
+namespace ams::os::impl {
+
+    /* Tick frequency must be less than INT64_MAX / 1 second. */
+    static constexpr s64 MaxTickFrequency = (std::numeric_limits<s64>::max() / TimeSpan::FromSeconds(1).GetNanoSeconds()) - 1;
+
+    class TickManager {
+        private:
+            TickManagerImpl impl;
+        public:
+            constexpr TickManager() : impl() { /* ... */ }
+
+            ALWAYS_INLINE Tick GetTick() const {
+                return this->impl.GetTick();
+            }
+
+            ALWAYS_INLINE s64 GetTickFrequency() const {
+                return this->impl.GetTickFrequency();
+            }
+
+            ALWAYS_INLINE s64 GetMaxTick() const {
+                return this->impl.GetMaxTick();
+            }
+
+            ALWAYS_INLINE s64 GetMaxTimeSpanNs() const {
+                return this->impl.GetMaxTimeSpanNs();
+            }
+
+            TimeSpan ConvertToTimeSpan(Tick tick) const;
+            Tick     ConvertToTick(TimeSpan ts) const;
+    };
+
+}