Update README.md

Removed the event-loop for a better system (for now) whereby we just dispatch signal handlers on the call to `push(Event)`.

In a future release I hope to bring the event loop back but in a signal-based manner, such that we can support deferred events and priorities and such

.github/workflows/d.yml

@@ -0,0 +1,32 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+name: D
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - uses: dlang-community/setup-dlang@4c99aa991ce7d19dd3064de0a4f2f6b2f152e2d7
+
+    - name: 'Build & Test'
+      run: |
+        # Build the project, with its main file included, without unittests
+        dub build --compiler=$DC
+        # Build and run tests, as defined by `unittest` configuration
+        # In this mode, `mainSourceFile` is excluded and `version (unittest)` are included
+        # See https://dub.pm/package-format-json.html#configurations
+        dub test --compiler=$DC

.gitignore

@@ -14,3 +14,5 @@ eventdisp-test-*
 *.obj
 *.lst
 libeventdisp.a
+eventy-test-library
+libeventy.a

README.md

@@ -1,15 +1,156 @@
-<center>
-<img src="logos/logo.png" width=250>
-
-<br>
+![](logos/logo.png)
 
 Eventy
 ======
 
 ### _Easy-to-use_ event-loop dispatcher framework for D-based applications
 
-TODO: Add stuff here
+---
 
+[![D](https://github.com/deavmi/eventy/actions/workflows/d.yml/badge.svg)](https://github.com/deavmi/eventy/actions/workflows/d.yml)
 
+## Getting started
 
-</center>
+### The _engine_
+
+The first thing every Eventy-based application will need is an instance of the `Engine`.
+This provides the user with a single object instance of the [`Engine` class](https://eventy.dpldocs.info/v0.4.3/eventy.engine.Engine.html) by which
+the user can register _event types_, _signal handlers_ for said events and the ability
+to trigger or _push_ events into the engine.
+
+The simplest way to get a new _engine_ up and running is as follow:
+
+```d
+Engine engine = new Engine();
+```
+
+This will create a new engine initializing all of its internals such that it is ready for
+use.
+
+### Event types
+
+_Event types_ are effectively just numbers. The use of these is to be able to connect events
+pushed into the engine with their respective signal handlers (which are registered to handle
+one or more event types).
+
+Let's create two event types, with IDs `1` and `2`:
+
+```d
+engine.addEventType(new EventType(1));
+engine.addEventType(new EventType(2));
+```
+
+This will tell the engine to create two new event types with tags `1` and `2` respectively.
+
+### Signal handlers
+
+We're almost done. So far we have created a new _engine_ for handling our event tyoes and
+the triggering of events. What is missing is something to _handle those event types_ when
+an event of one of those types is pushed into the engine. Such handlers are referred to as
+_signal handlers_ and in Eventy these are instances of the [`Signal` class](https://eventy.dpldocs.info/v0.4.3/eventy.signal.Signal.html).
+
+We're going to create a signal that can handle both of the event types `1` and `2` that we
+registered earlier on. We can do this by creating a class that inherits from the `Signal`
+base class:
+
+```d
+class SignalHandler1 : Signal
+{
+   	this()
+   	{
+   		super([1,2]);
+   	}
+    
+    public override void handler(Event e)
+   	{
+   		import std.stdio;
+   		writeln("Running event", e.getID());
+   	}
+}
+```
+
+We need to tell the `Signal` class two things:
+
+1. What _event typess_ it will handle
+2. What to _run_ for said event types
+
+---
+
+The first of these two is very easy, this is what you see in the constructor `this()`:
+
+```d
+this()
+{
+    super([1,2]);
+}
+```
+
+The `super([1,2])` call tells the Signal class that this signal handler handles those
+two IDs, namely `1` and `2`.
+
+---
+
+As for _what to run_, that is specified by overriding the `void handler(Event)` method
+in the `Signal` class. In our case we make it write to the console the ID of the event
+(which would end up either being `1` or `2` seeing as this handler is only registered
+for those event types).
+
+```d
+import std.stdio;
+writeln("Running event", e.id);
+```
+
+---
+
+We're almost there, trust me. The last thing to do is to register this signal handler
+with the engine, we do so as follows:
+
+```d
+Signal j = new SignalHandler1();
+engine.addSignalHandler(j);
+```
+
+### Triggering events
+
+Now comes the fun part, you can add events into the system by _pushing them to the core_
+as follows:
+
+```d
+Event eTest = new Event(1);
+engine.push(eTest);
+
+eTest = new Event(2);
+engine.push(eTest);
+```
+
+You will then see something like this:
+
+```
+Running event1
+Running event2
+```
+
+or:
+
+```
+Running event1
+Running event2
+```
+
+Despite us pushing the events into the engine in the order of `1` and _then_ `2`, the
+scheduling of such threads is up to the Linux kernel and hence one could be run before
+the other.
+
+---
+
+## Release notes
+
+### `v0.4.3`
+
+```
+Completely overhauled Eventy system for the v0.4.3 release
+
+Removed the event-loop for a better system (for now) whereby we just dispatch signal handlers on the call to `push(Event)`.
+
+In a future release I hope to bring the event loop back but in a signal-based manner, such that we can support deferred events and priorities and such
+```

source/eventy/config.d

@@ -0,0 +1,35 @@
+module eventy.config;
+
+import core.thread : Duration, dur;
+
+/**
+ * Configuration system for eventy
+ *
+ * Allows the user to specify certain
+ * tweaks to the engine
+ */
+public struct EngineSettings
+{
+    /* Agressive lock trying (can starve the loop-check) */
+    bool agressiveTryLock;
+
+    /* Hold-off mode */
+    HoldOffMode holdOffMode;
+
+    /* If `holdOffMode` is `SLEEP` then set the duration for the sleep */
+    Duration sleepTime;
+
+    /* Calling `shutdown()` will wait for any pending events to be dispatched before shutting down */
+    bool gracefulShutdown;
+}
+
+/**
+ * Hold off mode
+ *
+ * Method to use for "sleeping" the event loop
+ */
+public enum HoldOffMode
+{
+    YIELD,
+    SLEEP
+}

source/eventy/engine.d

@@ -1,35 +1,52 @@
 module eventy.engine;
 
-import eventy.queues : Queue;
-import eventy.signal : Signal, EventHandler;
+import eventy.types : EventType;
+import eventy.signal : Signal;
 import eventy.event : Event;
+import eventy.config;
+import eventy.exceptions;
 
 import std.container.dlist;
 import core.sync.mutex : Mutex;
 import core.thread : Thread, dur, Duration;
-
-import eventy.exceptions;
-
-
-import std.stdio;
-
-/* TODO: Move elsewhere, this thing thinks it's a delegate in the unit test, idk why */
-void runner(Event e)
-{
-    import std.stdio;
-    writeln("Running event", e.id);
-}
+import std.conv : to;
 
 unittest
 {
+    import std.stdio;
+
     Engine engine = new Engine();
-    engine.start();
 
- 
-    engine.addQueue(1);
-    engine.addQueue(2);
+    /**
+    * Let the event engine know what typeIDs are
+    * allowed to be queued
+    */
+    engine.addEventType(new EventType(1));
+    engine.addEventType(new EventType(2));
 
-    Signal j = new Signal([1,2], &runner);
+    /**
+    * Create a new Signal Handler that will handles
+    * event types `1` and `2` with the given `handler()`
+    * function
+    */
+    class SignalHandler1 : Signal
+    {
+        this()
+        {
+            super([1, 2]);
+        }
+
+        public override void handler(Event e)
+        {
+            writeln("Running event", e.getID());
+        }
+    }
+
+    /**
+    * Tell the event engine that I want to register
+    * the following handler for its queues `1` and `2`
+    */
+    Signal j = new SignalHandler1();
     engine.addSignalHandler(j);
 
     Event eTest = new Event(1);
@@ -37,12 +54,72 @@ unittest
 
     eTest = new Event(2);
     engine.push(eTest);
-    
 
     Thread.sleep(dur!("seconds")(2));
     engine.push(eTest);
 
-    writeln("naai");
+    writeln("done with main thread code");
+
+    while(engine.hasEventsRunning()) {}
+
+    /* TODO: Before shutting down, actually test it out (i.e. all events ran) */
+    engine.shutdown();
+}
+
+unittest
+{
+    import std.stdio;
+
+    EngineSettings customSettings = {holdOffMode: HoldOffMode.YIELD};
+    Engine engine = new Engine(customSettings);
+
+    /**
+    * Let the event engine know what typeIDs are
+    * allowed to be queued
+    */
+    engine.addEventType(new EventType(1));
+    engine.addEventType(new EventType(2));
+
+    /**
+    * Create a new Signal Handler that will handles
+    * event types `1` and `2` with the given `handler()`
+    * function
+    */
+    class SignalHandler1 : Signal
+    {
+        this()
+        {
+            super([1, 2]);
+        }
+
+        public override void handler(Event e)
+        {
+            writeln("Running event", e.getID());
+        }
+    }
+
+    /**
+    * Tell the event engine that I want to register
+    * the following handler for its queues `1` and `2`
+    */
+    Signal j = new SignalHandler1();
+    engine.addSignalHandler(j);
+
+    Event eTest = new Event(1);
+    engine.push(eTest);
+
+    eTest = new Event(2);
+    engine.push(eTest);
+
+    Thread.sleep(dur!("seconds")(2));
+    engine.push(eTest);
+
+    writeln("done with main thread code");
+
+    while(engine.hasEventsRunning()) {}
+
+    /* TODO: Before shutting down, actually test it out (i.e. all events ran) */
+    engine.shutdown();
 }
 
 /**
@@ -55,48 +132,98 @@ unittest
 * handlers, add signal handlers, among many
 * other things
 */
-public final class Engine : Thread
+public final class Engine
 {
-    /* TODO: Or use a queue data structure */
-    private DList!(Queue) queues;
-    private Mutex queueLock;
+    /* Registered queues */
+    private DList!(EventType) eventTypes;
+    private Mutex eventTypesLock;
 
-    /* TODO: Or use a queue data structure */
+    /* Registered signal handlers */
     private DList!(Signal) handlers;
     private Mutex handlerLock;
 
-    private Duration sleepTime;
+    /* Engine configuration */
+    private EngineSettings settings;
 
+    /* Whether engine is running or not */
+    private bool running;
+
+    /* Dispatched threads */
+    private DList!(DispatchWrapper) threadStore;
+    private Mutex threadStoreLock;
+
+    /** 
+     * Instantiates a new Eventy engine with the provided
+     * configuration
+     *
+     * Params:
+     *   settings = The EngineSettings to use
+     */
+    this(EngineSettings settings)
+    {
+        eventTypesLock = new Mutex();
+        handlerLock = new Mutex();
+        threadStoreLock = new Mutex();
+
+        this.settings = settings;
+    }
+
+    /** 
+     * Instantiates a new Eventy engine with the default
+     * settings
+     */
     this()
     {
-        super(&run);
-        queueLock = new Mutex();
-        handlerLock = new Mutex();
+        EngineSettings defaultSettings;
+
+        /* Yield if a lock fails (prevent potential thread starvation) */
+        defaultSettings.agressiveTryLock = false;
+
+        // FIXME: Investigate ways to lower load average
+        // /* Make the event engine loop sleep (1) and for 50ms (2) (TODO: Adjust this) */
+        // defaultSettings.holdOffMode = HoldOffMode.SLEEP;
+        // defaultSettings.sleepTime = dur!("msecs")(50);
+
+        /* Use yeilding for most responsiveness */
+        defaultSettings.holdOffMode = HoldOffMode.YIELD;
+
+        /* Do not gracefully shutdown */
+        defaultSettings.gracefulShutdown = false;
+
+        this(defaultSettings);
     }
 
-    /**
-    * Set the event loop sleep time
-    *
-    * The load average will sky rocket if it is 0,
-    * which is just because it is calculated on how
-    * full the run queue is, length but also over time
-    * and even just one task continousy in it will
-    * make the average high
-    *
-    * Reason why it's always runnable is the process
-    * (the "thread") is a tight loop with no sleeps
-    * that would dequeue it from the run queue and/or
-    * no I/O system calls that would put it into the
-    * waiting queue
-    */
-    public void setSleep(Duration time)
+    /** 
+     * Returns the current configuration paremeters being
+     * used by the engine
+     *
+     * Returns: The EngineSettings struct
+     */
+    public EngineSettings getConfig()
     {
-        sleepTime = time;
+        return settings;
     }
 
+    /** 
+     * Updates the current configuration of the engine
+     *
+     * Params:
+     *   newSettings = The new EngineSettings struct to use
+     */
+    public void setConfig(EngineSettings newSettings)
+    {
+        this.settings = newSettings;
+    }
+
+    /** 
+     * Attaches a new signal handler to the engine
+     *
+     * Params:
+     *   e = the signal handler to add
+     */
     public void addSignalHandler(Signal e)
     {
-         /* Lock the signal-set */
+        /* Lock the signal-set */
         handlerLock.lock();
 
         /* Add the new handler */
@@ -106,103 +233,161 @@ public final class Engine : Thread
         handlerLock.unlock();
     }
 
-    /**
-    * Event loop
-    */
-    public void run()
+    /** 
+     * Shuts down the event engine
+     */
+    public void shutdown()
     {
-        while(true)
+        /* TODO: Insert a lock here, that dispatch should adhere too as well */
+
+        /* FIXME: We should prevent adding of queues during shutdown */
+        /* FIXME: We should prevent pushing of events during shutdown */
+
+        /* Wait for any pendings events (if configured) */
+        if(settings.gracefulShutdown)
         {
-            /* TODO: Implement me */
-
-            /**
-            * TODO: If lock fails, then yield
-            */
-
-            /**
-            * Lock the queue-set
-            *
-            * Additionally:
-            * Don't waste time spinning on mutex,
-            * if it is not lockable then yield
-            */
-            while(!queueLock.tryLock_nothrow())
-            {
-                yield();
-            }
-
-
-            foreach(Queue queue; queues)
-            {  
-                /* If the queue has evenets queued */
-                if(queue.hasEvents())
-                {
-                    /* TODO: Add different dequeuing techniques */
-
-                    /* Pop the first Event */
-                    Event headEvent = queue.popEvent();
-                   
-                    /* Get all signal-handlers for this event type */
-                    Signal[] handlersMatched = getSignalsForEvent(headEvent);
-
-                    /* Dispatch the signal handlers */
-                    dispatch(handlersMatched, headEvent);
-                    
-                }
-            }
-
-            /* Unlock the queue set */
-            queueLock.unlock();
-
-            /* Yield to stop mutex starvation */
-            yield();
-
-            /* TODO: Add yield to stop mutex starvation on a single thread */
-
-            /* Sleep the thread */
-            // sleepTime = dur!("seconds")(0);
-            // sleep(sleepTime);
+            while(hasEventsRunning()) {}
         }
     }
 
-    /**
-    * Dispatch(Signal[] set, Event e)
-    *
-    * Creates a new thread per signal and dispatches the event to them
-    *
-    * TODO: Add ability to dispatch on this thread
-    */
+    /** 
+     * Creates a new thread per signal and dispatches the event to them
+     *
+     * Params:
+     *   signalSet = The signal handlers to use for dispatching
+     *   e = the Event to be dispatched to each handler
+     */
     private void dispatch(Signal[] signalSet, Event e)
     {
-        foreach(Signal signal; signalSet)
+        foreach (Signal signal; signalSet)
         {
             /* Create a new Thread */
-            Thread handlerThread = getThread(signal, e);
+            DispatchWrapper handlerThread = new DispatchWrapper(signal, e);
+
+            /**
+            * TODO
+            *
+            * When we call `shutdown()` there may very well be a case of
+            * where the threadStoreLock unlocks after the clean up
+            * loop, but storeThread hangs here during that time,
+            * then proceeds to start the thread, we should therefore,
+            * either block on running changed (solution 1, not as granular)
+            *
+            * Solution 2: Block on dispatch being called <- use this method rather
+            * But still needs a running check, it must not go ahead if running is now
+            * false
+            */
+
+            /* Store the thread */
+            storeThread(handlerThread);
 
             /* Start the thread */
             handlerThread.start();
         }
     }
 
-    private Thread getThread(Signal signal, Event e)
+    /** 
+     * Adds a thread to the thread store
+     *
+     * Params:
+     *   t = the thread to add
+     */
+    private void storeThread(DispatchWrapper t)
     {
-        Thread signalHandlerThread = new class Thread
-        {
-            this()
-            {
-                super(&worker);
-            }
+        /**
+        * TODO: This can only be implemented if we use
+        * wrapper threads that exit, and we can signal
+        * removal from thread store then
+        */
 
-            public void worker()
-            {
-                EventHandler handler = signal.getHandler();
-                handler(e);
-            }
-        };
+        /* Lock the thread store from editing */
+        threadStoreLock.lock();
 
-        return signalHandlerThread;
+        /* Add the thread */
+        threadStore ~= t;
+
+        /* Unlock the thread store for editing */
+        threadStoreLock.unlock();
     }
 
+    /** 
+     * Removes a thread from the thread store
+     *
+     * Params:
+     *   t = the thread to remove
+     */
+    private void removeThread(DispatchWrapper t)
+    {
+        /* Lock the thread store from editing */
+        threadStoreLock.lock();
+
+        /* Remove the thread */
+        threadStore.linearRemoveElement(t);
+
+        /* Unlock the thread store for editing */
+        threadStoreLock.unlock();
+    }
+
+    /** 
+     * Checks whether or not there are still events
+     * running at the time of calling
+     *
+     * Returns: <code>true</code> if there are events
+     * still running, <code>false</code> otherwise
+     */
+    public bool hasEventsRunning()
+    {
+        /* Whether there are events running or not */
+        bool has = false;
+
+        /* Lock the thread store */
+        threadStoreLock.lock();
+
+        has = !threadStore.empty();
+
+        /* Unlock the thread store */
+        threadStoreLock.unlock();
+
+        return has;
+    }
+
+    /** 
+     * DispatchWrapper
+     *
+     * Effectively a thread but with the Signal,
+     * Event included with clean-up routines
+     */
+    private class DispatchWrapper : Thread
+    {
+        private Signal signal;
+        private Event e;
+
+        this(Signal signal, Event e)
+        {
+            super(&run);
+            this.signal = signal;
+            this.e = e;
+        }
+
+        private void run()
+        {
+            /* Run the signal handler */
+            signal.handler(e);
+
+            /* Remove myself from the thread store */
+            removeThread(this);
+        }
+    }
+
+    /** 
+     * Returns all the signal handlers responsible
+     * for handling the type of Event provided
+     *
+     * Params:
+     *   e = the Event type to match to
+     * Returns: A Signal[] containing each handler
+     *          registered to handle type <code>e</code>
+     */
     public Signal[] getSignalsForEvent(Event e)
     {
         /* Matched handlers */
@@ -212,9 +397,9 @@ public final class Engine : Thread
         handlerLock.lock();
 
         /* Find all handlers matching */
-        foreach(Signal signal; handlers)
+        foreach (Signal signal; handlers)
         {
-            if(signal.handles(e.id))
+            if (signal.handles(e.getID()))
             {
                 matchedHandlers ~= signal;
             }
@@ -226,70 +411,127 @@ public final class Engine : Thread
         return matchedHandlers;
     }
 
-    /**
-    * push(Event e)
-    *
-    * Provided an Event, `e`, this will enqueue the event
-    * to 
-    */
+    /** 
+     * Checks if there is a signal handler that handles
+     * the given event id
+     *
+     * Params:
+     *   id = the event ID to check
+     * Returns: <code>true</code> if a signal handler does
+     *          exist, <code>false</code> otherwise
+     */
+    public bool isSignalExists(ulong id)
+    {
+    	return getSignalsForEvent(new Event(id)).length != 0;
+    }
+
+    /** 
+     * Pushes the given Event into the engine
+     * for eventual dispatch
+     *
+     * Params:
+     *   e = the event to push
+     */
     public void push(Event e)
     {
-        Queue matchedQueue = findQueue(e.id);
+        //TODO: New code goes below here
+        /** 
+         * What we want to do here is to effectively
+         * wake up a checker thread and also (before that)
+         * perhaps we say what queue was modified
+         *
+         * THEN the checker thread goes to said queue and
+         * executes said event (dispatches it) and then sleep
+         * again till it is interrupted. We need Pids and kill etc for this
+         *
+         * Idea (2)
+         *
+         * If we cannot do a checker thread then we can spwan a thread here
+         * but then we get no control for priorities etc, although actually we could
+         * maybe? It depends, we don't want multiple dispathers at same time then
+         * (A checker thread would ensure we don't get this)
+         */
 
-        if(matchedQueue)
+        /* Obtain all signal handlers for the given event */
+        Signal[] handlersMatched = getSignalsForEvent(e);
+
+        /* If we get signal handlers then dispatch them */
+        if(handlersMatched.length)
         {
-            /* Append to the queue */
-            matchedQueue.add(e);
+            dispatch(handlersMatched, e);
+        }
+        /* If there are no matching events */
+        else
+        {
+            //TODO: Add default handler support
+            //TODO: Add error throwing in case where not true
         }
     }
 
-    public void addQueue(ulong id)
+    /** 
+     * Registers a new EventType with the engine
+     * and then adds it.
+     * 
+     * Throws EventyException if the id of the given
+     * EventType is is already in use by another
+     *
+     * Params:
+     *   id = the id of the new event type to add
+     * Throws: EventyException
+     */
+    public void addEventType(EventType evType)
     {
-        /* Create a new queue with the given id */
-        Queue newQueue = new Queue(id);
-
-        /* Lock the queue collection */
-        queueLock.lock();
+        /* Lock the event types list */
+        eventTypesLock.lock();
 
         /* If no such queue exists then add it (recursive mutex used) */
-        if(!findQueue(id))
+        if (!findEventType(evType.getID()))
         {
-            /* Add the queue */
-            queues ~= newQueue;
+            /* Add the event types list */
+            eventTypes ~= evType;
         }
         else
         {
-            throw new EventyException("Failure to add queue with ID already in use");
+            throw new EventyException("Failure to add EventType with id '"~to!(string)(evType.getID())~"\' as it is already in use");
         }
-        
 
-        /* Unlock the queue collection */
-        queueLock.unlock();
+        /* Unlock the event types list */
+        eventTypesLock.unlock();
     }
 
-    public Queue findQueue(ulong id)
+    /** 
+     * Given an if, this will return the EventType
+     * associated with said id
+     *
+     * Params:
+     *   id = the id of the EventType
+     * Returns: The EventType if found, otherwise
+     *          <code>null</code>
+     */
+    public EventType findEventType(ulong id)
     {
-        /* Lock the queue collection */
-        queueLock.lock();
+        /* Lock the EventType list */
+        eventTypesLock.lock();
 
-        /* Find the matching queue */
-        Queue matchedQueue;
-        foreach(Queue queue; queues)
+        /* Find the matching EventType */
+        EventType matchedEventType;
+        foreach (EventType eventType; eventTypes)
         {
-            if(queue.id == id)
+            if (eventType.getID() == id)
             {
-                matchedQueue = queue;
+                matchedEventType = eventType;
                 break;
             }
         }
 
-        /* Unlock the queue collection */
-        queueLock.unlock();
+        /* Unlock the EventType list */
+        eventTypesLock.unlock();
 
-        return matchedQueue;
+        return matchedEventType;
     }
 
-    public ulong[] getTypes()
+    /* TODO: Add coumentation */
+    private ulong[] getTypes()
     {
         /* TODO: Implement me */
         return null;

source/eventy/event.d

@@ -1,20 +1,34 @@
 module eventy.event;
 
-/**
-* Event
-*
-* An Event represents a trigger for a given signal(s)
-* handlers which associate with the given typeID
-*/
+/** 
+ * Event
+ *
+ * An Event represents a trigger for a given signal(s)
+ * handlers which associate with the given typeID
+ */
 public class Event
 {
-    /**
-    *
-    */
+    /* The event's type id */
+    private ulong id;
+
+    /** 
+     * Creates a new Event with the given typeID
+     *
+     * Params:
+     *   typeID = the new Event's type ID
+     */
     this(ulong typeID)
     {
         this.id = typeID;
     }
 
-    ulong id;
-}
+    /** 
+     * Returns the type ID of this Event
+     *
+     * Returns: The Event's type ID
+     */
+    public final ulong getID()
+    {
+        return id;
+    }
+}

source/eventy/exceptions.d

@@ -1,5 +1,10 @@
 module eventy.exceptions;
 
+/** 
+ * EventyException
+ *
+ * An Eventy runtime error
+ */
 public final class EventyException : Exception
 {
     this(string message)

source/eventy/package.d

@@ -3,5 +3,6 @@ module eventy;
 public import eventy.event;
 public import eventy.exceptions;
 public import eventy.engine;
-public import eventy.queues;
-public import eventy.signal;
+public import eventy.types;
+public import eventy.signal;
+public import eventy.config;

source/eventy/queues.d

@@ -1,75 +0,0 @@
-module eventy.queues;
-
-import eventy.event : Event;
-import core.sync.mutex : Mutex;
-import std.container.dlist;
-import std.range;
-
-/**
-* Queue
-*
-* Represents a queue with a given ID that can
-* have Event-s enqueued to it
-*/
-public final class Queue
-{
-    public ulong id;
-    /* TODO: Add queue of Event's here */
-
-    private DList!(Event) queue;
-    private Mutex queueLock;
-
-
-    this(ulong id)
-    {
-        this.id = id;
-        queueLock = new Mutex();
-    }
-
-    public DList!(Event).Range getKak()
-    {
-        return queue[];
-    }
-
-    public void add(Event e)
-    {
-        /* Lock the queue */
-        queueLock.lock();
-
-        queue.insert(e);
-
-        /* Unlock the queue */
-        queueLock.unlock();
-    }
-
-    public bool hasEvents()
-    {
-        bool has;
-
-        /* Lock the queue */
-        queueLock.lock();
-
-        has = !(queue[]).empty();
-
-        /* Unlock the queue */
-        queueLock.unlock();
-
-        return has;
-    }
-
-    public Event popEvent()
-    {
-        Event poppedEvent;
-
-        /* Lock the queue */
-        queueLock.lock();
-        
-        poppedEvent = (queue[]).front();
-        queue.removeFront();
-
-        /* Unlock the queue */
-        queueLock.unlock();
-
-        return poppedEvent;
-    }
-}

source/eventy/signal.d

@@ -9,20 +9,19 @@ import eventy.event : Event;
 * which means that it contains an associated function to be run
 * on handling of a given Event
 */
-alias EventHandler = void function(Event);
+//alias EventHandler = void function(Event);
 
-public class Signal
+public abstract class Signal
 {
     /* TypeIDs this signal handler associates with */
     private ulong[] typeIDs;
 
     /* Signal handler */
-    private EventHandler handler;
+    //private EventHandler handler;
 
-    this(ulong[] typeIDs, EventHandler handler)
+    this(ulong[] typeIDs)
     {
         this.typeIDs = typeIDs;
-        this.handler = handler;
     }
 
     /**
@@ -53,8 +52,5 @@ public class Signal
         
     }
 
-    public EventHandler getHandler()
-    {
-        return handler;
-    }
-}
+    public abstract void handler(Event);
+}

source/eventy/types.d

@@ -0,0 +1,40 @@
+module eventy.types;
+
+import eventy.event : Event;
+import core.sync.mutex : Mutex;
+import std.container.dlist;
+import std.range;
+
+/**
+* EventType
+*
+* Represents a type of event. Every Event has an EventType
+* and Signal(s)-handlers register to one or more of these
+* types to handle
+*/
+public final class EventType
+{
+    /* The EventType's ID */
+    private ulong id;
+
+    /** 
+     * Instantiates a new EventType with the given id
+     *
+     * Params:
+     *   id = The EventType's id
+     */
+    this(ulong id)
+    {
+        this.id = id;
+    }
+
+    /** 
+     * Returns the id of this EventType
+     *
+     * Returns: The id of this EventType
+     */
+    public ulong getID()
+    {
+        return id;
+    }
+}