os: refactor/rewrite entire namespace.

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

@@ -0,0 +1,64 @@
+/*
+ * 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>
+#include "os_tick_manager.hpp"
+
+#if defined(ATMOSPHERE_OS_HORIZON)
+    #include "os_timeout_helper_impl.os.horizon.hpp"
+#else
+    #error "Unknown OS for ams::os::TimeoutHelper"
+#endif
+
+namespace ams::os::impl {
+
+    class TimeoutHelper {
+        private:
+            Tick absolute_end_tick;
+        public:
+            explicit TimeoutHelper(TimeSpan timeout) {
+                if (timeout == 0) {
+                    /* If timeout is zero, don't do relative tick calculations. */
+                    this->absolute_end_tick = Tick(0);
+                } else {
+                    const auto &tick_manager = impl::GetTickManager();
+
+                    const u64 cur_tick     = tick_manager.GetTick().GetInt64Value();
+                    const u64 timeout_tick = tick_manager.ConvertToTick(timeout).GetInt64Value();
+                    const u64 end_tick     = cur_tick + timeout_tick + 1;
+
+                    this->absolute_end_tick = Tick(std::min<u64>(std::numeric_limits<s64>::max(), end_tick));
+                }
+            }
+
+            static void Sleep(TimeSpan tm) {
+                TimeoutHelperImpl::Sleep(tm);
+            }
+
+            bool TimedOut() const {
+                if (this->absolute_end_tick.GetInt64Value() == 0) {
+                    return true;
+                }
+
+                const Tick cur_tick = impl::GetTickManager().GetTick();
+
+                return cur_tick >= this->absolute_end_tick;
+            }
+
+            TargetTimeSpan GetTimeLeftOnTarget() const;
+    };
+
+}