summaryrefslogtreecommitdiffstats
path: root/mono/Service.cs
blob: 5f6ff4c44e6f1bf55774be780f39e651f6bf0961 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
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);

  }
}