ams: support building unit test programs on windows/linux/macos

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

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 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>
+#include <mmsystem.h>
+
+namespace ams::os::impl {
+
+    class TickManagerImpl {
+        private:
+            s64 m_tick_frequency;
+            TimeSpan m_max_time;
+            s64 m_max_tick;
+        public:
+            TickManagerImpl() {
+                /* Get the tick frequency. */
+                ::timeBeginPeriod(1);
+
+                LARGE_INTEGER freq;
+                ::QueryPerformanceFrequency(std::addressof(freq));
+                m_tick_frequency = static_cast<s64>(freq.QuadPart);
+
+                /* Set maximums. */
+                constexpr s64 TickFrequencyForNanoSecondResolution = TimeSpan::FromSeconds(1).GetNanoSeconds();
+                if (m_tick_frequency <= TickFrequencyForNanoSecondResolution) {
+                    m_max_tick = m_tick_frequency * (std::numeric_limits<s64>::max() / TickFrequencyForNanoSecondResolution);
+                    m_max_time = TimeSpan::FromNanoSeconds(std::numeric_limits<s64>::max());
+                } else {
+                    m_max_tick = std::numeric_limits<s64>::max();
+                    m_max_time = TimeSpan::FromSeconds(std::numeric_limits<s64>::max() / m_tick_frequency);
+                }
+            }
+
+            ~TickManagerImpl() {
+                ::timeEndPeriod(1);
+            }
+
+            ALWAYS_INLINE Tick GetTick() const {
+                LARGE_INTEGER freq;
+                ::QueryPerformanceFrequency(std::addressof(freq));
+                return Tick(static_cast<s64>(freq.QuadPart));
+            }
+
+            ALWAYS_INLINE Tick GetSystemTickOrdered() const {
+                LARGE_INTEGER freq;
+
+                PerformOrderingForGetSystemTickOrdered();
+                ::QueryPerformanceFrequency(std::addressof(freq));
+                PerformOrderingForGetSystemTickOrdered();
+
+                return Tick(static_cast<s64>(freq.QuadPart));
+            }
+
+            ALWAYS_INLINE s64 GetTickFrequency() const {
+                return m_tick_frequency;
+            }
+
+            ALWAYS_INLINE s64 GetMaxTick() const {
+                return m_max_tick;
+            }
+
+            ALWAYS_INLINE s64 GetMaxTimeSpanNs() const {
+                return m_max_time.GetNanoSeconds();
+            }
+        private:
+            static ALWAYS_INLINE void PerformOrderingForGetSystemTickOrdered() {
+                int a = 0, b, c = 0, d;
+                __asm__ __volatile__("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(a), "2"(c) : "memory");
+            }
+    };
+
+}