2 * Copyright (c) 1998-1999, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
6 * $Log: yaz-socket-observer.h,v $
7 * Revision 1.3 1999-03-23 14:17:57 adam
8 * More work on timeout handling. Work on yaz-client.
10 * Revision 1.2 1999/02/02 14:01:17 adam
11 * First WIN32 port of YAZ++.
13 * Revision 1.1.1.1 1999/01/28 09:41:07 adam
14 * First implementation of YAZ++.
18 #ifndef YAZ_SOCKET_OBSERVER_H
19 #define YAZ_SOCKET_OBSERVER_H
21 #define YAZ_SOCKET_OBSERVE_READ 1
22 #define YAZ_SOCKET_OBSERVE_WRITE 2
23 #define YAZ_SOCKET_OBSERVE_EXCEPT 4
24 #define YAZ_SOCKET_OBSERVE_TIMEOUT 8
29 class IYazSocketObserver;
31 /** Socket Observable.
32 This interface implements notification of socket events.
33 The module interested in (observing) the sockets
34 must implement the IYazSocketObserver interface. The
35 IYazSocketObserver only have to implement one function, so it's
36 quite simple to observe sockets change state.
37 The socket events below specifies read, write, exception,
38 and timeout respectively:
40 YAZ_SOCKET_OBSERVE_READ
41 YAZ_SOCKET_OBSERVE_WRITE
42 YAZ_SOCKET_OBSERVE_EXCEPT
43 YAZ_SOCKET_OBSERVE_TIMEOUT
45 The maskObserver method specifies which of these events the
46 observer is intertested in.
48 class YAZ_EXPORT IYazSocketObservable {
50 /// Add an observer interested in socket fd
51 virtual void addObserver(int fd, IYazSocketObserver *observer) = 0;
52 /// Delete an observer
53 virtual void deleteObserver(IYazSocketObserver *observer) = 0;
54 /// Delete all observers
55 virtual void deleteObservers() = 0;
56 /// Specify the events that the observer is intersted in.
57 virtual void maskObserver(IYazSocketObserver *observer, int mask) = 0;
59 virtual void timeoutObserver(IYazSocketObserver *observer,
64 The IYazSocketObserver interface implements a module interested
65 socket events. Look for objects that implements the
66 IYazSocketObservable interface!
68 class YAZ_EXPORT IYazSocketObserver {
70 /// Notify the observer that something happened to socket
71 virtual void socketNotify(int event) = 0;