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 1.1 1999-01-28 09:41:07 adam
12 #ifndef YAZ_SOCKET_OBSERVER_H
13 #define YAZ_SOCKET_OBSERVER_H
15 #define YAZ_SOCKET_OBSERVE_READ 1
16 #define YAZ_SOCKET_OBSERVE_WRITE 2
17 #define YAZ_SOCKET_OBSERVE_EXCEPT 4
18 #define YAZ_SOCKET_OBSERVE_TIME 8
23 class IYazSocketObserver;
25 /** Socket Observable.
26 This interface implements notification of socket events.
27 The module interested in (observing) the sockets
28 must implement the IYazSocketObserver interface. The
29 IYazSocketObserver only have to implement one function, so it's
30 quite simple to observe sockets change state.
31 The socket events below specifies read, write, exception,
32 and timeout respectively:
34 YAZ_SOCKET_OBSERVE_READ
35 YAZ_SOCKET_OBSERVE_WRITE
36 YAZ_SOCKET_OBSERVE_EXCEPT
37 YAZ_SOCKET_OBSERVE_TIMEOUT
39 The maskObserver method specifies which of these events the
40 observer is intertested in.
42 class IYazSocketObservable {
44 /// Add an observer interested in socket fd
45 virtual void addObserver(int fd, IYazSocketObserver *observer) = 0;
46 /// Delete an observer
47 virtual void deleteObserver(IYazSocketObserver *observer) = 0;
48 /// Delete all observers
49 virtual void deleteObservers() = 0;
50 /// Specify the events that the observer is intersted in.
51 virtual void maskObserver(IYazSocketObserver *observer, int mask) = 0;
53 virtual void timeoutObserver(IYazSocketObserver *observer,
58 The IYazSocketObserver interface implements a module interested
59 socket events. Look for objects that implements the
60 IYazSocketObservable interface!
62 class IYazSocketObserver {
64 /// Notify the observer that something happened to socket
65 virtual void socketNotify(int event) = 0;