Initial commit

src/Alarm.cpp

@@ -0,0 +1,60 @@
+#include "Alarm.h"
+
+namespace NGame {
+
+void TAlarm::Set(TId id, std::uint32_t millis) {
+    auto& data = Alarms_[id];
+    data.Target = millis;
+    data.Current = 0;
+}
+
+void TAlarm::Unset(TId id) {
+    auto& data = Alarms_[id];
+    data.Target = 0;
+    data.Current = 0;
+}
+
+void TAlarm::Update(std::uint32_t delta) {
+    for (auto it = Alarms_.begin(); it != Alarms_.end(); ++it) {
+        auto& alarm = it->second;
+        if (alarm.Target) {
+            alarm.Current += delta;
+        }
+
+        if (alarm.Current >= alarm.Target) {
+            DueAlarms_.push(it->first);
+        }
+    }
+}
+
+bool TAlarm::Next(TId& id) {
+    bool repeat;
+    
+    do {
+        repeat = false;
+
+        if (DueAlarms_.empty())
+            return false;
+
+        id = DueAlarms_.front();
+        DueAlarms_.pop();
+
+        auto& alarm = Alarms_[id];
+        if (alarm.Target) {
+            if (alarm.Current >= alarm.Target) {
+                alarm.Current -= alarm.Target;
+            }
+            
+            if (alarm.Current >= alarm.Target) {
+                DueAlarms_.push(id);
+            }
+        } else {
+            alarm.Current = 0;
+            repeat = true;
+        }
+    } while (repeat);
+
+    return true;
+}
+
+} // namespace NGame