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namespace DBus
{
using System;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Collections;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;
public class Service
{
private Connection connection;
private string name;
private bool local = false;
private Hashtable registeredHandlers = new Hashtable();
private delegate int DBusHandleMessageFunction(IntPtr rawConnection,
IntPtr rawMessage,
IntPtr userData);
private DBusHandleMessageFunction filterCalled;
public delegate void SignalCalledHandler(Signal signal);
public event SignalCalledHandler SignalCalled;
private static AssemblyBuilder proxyAssembly;
private ModuleBuilder module = null;
internal Service(string name, Connection connection)
{
this.name = name;
this.connection = connection;
AddFilter();
}
public Service(Connection connection, string name)
{
Error error = new Error();
error.Init();
// This isn't used for now
uint flags = 0;
if (dbus_bus_request_name (connection.RawConnection, name, flags, ref error) == -1) {
throw new DBusException(error);
}
this.connection = connection;
this.name = name;
this.local = true;
}
public static bool HasOwner(Connection connection, string name)
{
Error error = new Error();
error.Init();
if (dbus_bus_name_has_owner(connection.RawConnection,
name,
ref error)) {
return true;
} else {
if (error.IsSet) {
throw new DBusException(error);
}
return false;
}
}
public static Service Get(Connection connection, string name)
{
if (HasOwner(connection, name)) {
return new Service(name, connection);
} else {
throw new ApplicationException("Name '" + name + "' does not exist.");
}
}
public void UnregisterObject(object handledObject)
{
Handler handler = (Handler) registeredHandlers[handledObject];
registeredHandlers.Remove(handledObject);
handler.Dispose();
}
public void RegisterObject(object handledObject,
string pathName)
{
Handler handler = new Handler(handledObject, pathName, this);
registeredHandlers.Add(handledObject, handler);
}
internal Handler GetHandler(object handledObject)
{
if (!registeredHandlers.Contains(handledObject)) {
throw new ArgumentException("No handler registered for object: " + handledObject);
}
return (Handler) registeredHandlers[handledObject];
}
public object GetObject(Type type, string pathName)
{
ProxyBuilder builder = new ProxyBuilder(this, type, pathName);
object proxy = builder.GetProxy();
return proxy;
}
private void AddFilter()
{
// Setup the filter function
this.filterCalled = new DBusHandleMessageFunction(Service_FilterCalled);
if (!dbus_connection_add_filter(Connection.RawConnection,
this.filterCalled,
IntPtr.Zero,
IntPtr.Zero))
throw new OutOfMemoryException();
// Add a match for signals. FIXME: Can we filter the service?
string rule = "type='signal'";
dbus_bus_add_match(connection.RawConnection, rule, IntPtr.Zero);
}
private int Service_FilterCalled(IntPtr rawConnection,
IntPtr rawMessage,
IntPtr userData)
{
Message message = Message.Wrap(rawMessage, this);
if (message.Type == Message.MessageType.Signal) {
// We're only interested in signals
Signal signal = (Signal) message;
if (SignalCalled != null) {
Message.Push (message);
SignalCalled(signal);
Message.Pop ();
}
}
return (int) Result.NotYetHandled;
}
public string Name
{
get
{
return this.name;
}
}
public Connection Connection
{
get
{
return connection;
}
set
{
this.connection = value;
}
}
internal AssemblyBuilder ProxyAssembly
{
get {
if (proxyAssembly == null){
AssemblyName assemblyName = new AssemblyName();
assemblyName.Name = "DBusProxy";
proxyAssembly = Thread.GetDomain().DefineDynamicAssembly(assemblyName,
AssemblyBuilderAccess.RunAndSave);
}
return proxyAssembly;
}
}
internal ModuleBuilder Module
{
get {
if (this.module == null) {
this.module = ProxyAssembly.DefineDynamicModule(Name, Name + ".proxy.dll", true);
}
return this.module;
}
}
[DllImport("dbus-1")]
private extern static int dbus_bus_request_name(IntPtr rawConnection,
string serviceName,
uint flags, ref Error error);
[DllImport("dbus-1")]
private extern static bool dbus_bus_name_has_owner(IntPtr rawConnection,
string serviceName,
ref Error error);
[DllImport("dbus-1")]
private extern static bool dbus_connection_add_filter(IntPtr rawConnection,
DBusHandleMessageFunction filter,
IntPtr userData,
IntPtr freeData);
[DllImport("dbus-1")]
private extern static void dbus_bus_add_match(IntPtr rawConnection,
string rule,
IntPtr erro);
}
}
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