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[wxWidgets.git] / include / wx / private / selectdispatcher.h
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1/////////////////////////////////////////////////////////////////////////////
2// Name: wx/private/selectdispatcher.h
3// Purpose: wxSelectDispatcher class
b46b1d59 4// Authors: Lukasz Michalski and Vadim Zeitlin
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5// Created: December 2006
6// Copyright: (c) Lukasz Michalski
7// RCS-ID: $Id$
8// Licence: wxWindows licence
9/////////////////////////////////////////////////////////////////////////////
10
11#ifndef _WX_PRIVATE_SELECTDISPATCHER_H_
12#define _WX_PRIVATE_SELECTDISPATCHER_H_
13
14#include "wx/defs.h"
15
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16#if wxUSE_SELECT_DISPATCHER
17
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18#ifdef __WATCOMC__
19 #include <types.h>
20 #include <sys/ioctl.h>
db3df3c4 21 #include <sys/time.h>
ddfed775 22 #include <sys/select.h>
db3df3c4 23 #include <tcpustd.h>
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24#else
25 #include <sys/types.h>
26#endif
c3938816 27
b46b1d59 28#include "wx/private/fdiodispatcher.h"
30c45bdd 29
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30// helper class storing all the select() fd sets
31class WXDLLIMPEXP_BASE wxSelectSets
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32{
33public:
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34 // ctor zeroes out all fd_sets
35 wxSelectSets();
30c45bdd 36
b46b1d59 37 // default copy ctor, assignment operator and dtor are ok
72fa3e8a 38
30c45bdd 39
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40 // return true if fd appears in any of the sets
41 bool HasFD(int fd) const;
30c45bdd 42
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43 // add or remove FD to our sets depending on whether flags contains
44 // wxFDIO_INPUT/OUTPUT/EXCEPTION bits
45 bool SetFD(int fd, int flags);
30c45bdd 46
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47 // same as SetFD() except it unsets the bits set in the flags for the given
48 // fd
af57c51a 49 bool ClearFD(int fd)
30c45bdd 50 {
af57c51a 51 return SetFD(fd, 0);
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52 }
53
30c45bdd 54
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55 // call select() with our sets: the other parameters are the same as for
56 // select() itself
57 int Select(int nfds, struct timeval *tv);
58
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59 // call the handler methods corresponding to the sets having this fd if it
60 // is present in any set and return true if it is
61 bool Handle(int fd, wxFDIOHandler& handler) const;
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62
63private:
64 typedef void (wxFDIOHandler::*Callback)();
65
66 // the FD sets indices
67 enum
68 {
69 Read,
70 Write,
71 Except,
72 Max
73 };
74
75 // the sets used with select()
76 fd_set m_fds[Max];
77
78 // the wxFDIO_XXX flags, functions and names (used for debug messages only)
79 // corresponding to the FD sets above
80 static int ms_flags[Max];
81 static const char *ms_names[Max];
82 static Callback ms_handlers[Max];
83};
84
ad8d42f8 85class WXDLLIMPEXP_BASE wxSelectDispatcher : public wxMappedFDIODispatcher
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86{
87public:
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88 // default ctor
89 wxSelectDispatcher() { m_maxFD = -1; }
30c45bdd 90
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91 // implement pure virtual methods of the base class
92 virtual bool RegisterFD(int fd, wxFDIOHandler *handler, int flags = wxFDIO_ALL);
93 virtual bool ModifyFD(int fd, wxFDIOHandler *handler, int flags = wxFDIO_ALL);
af57c51a 94 virtual bool UnregisterFD(int fd);
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95 virtual bool HasPending() const;
96 virtual int Dispatch(int timeout = TIMEOUT_INFINITE);
30c45bdd 97
30c45bdd 98private:
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99 // common part of RegisterFD() and ModifyFD()
100 bool DoUpdateFDAndHandler(int fd, wxFDIOHandler *handler, int flags);
30c45bdd 101
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102 // call the handlers for the fds present in the given sets, return the
103 // number of handlers we called
104 int ProcessSets(const wxSelectSets& sets);
30c45bdd 105
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106 // helper of ProcessSets(): call the handler if its fd is in the set
107 void DoProcessFD(int fd, const fd_set& fds, wxFDIOHandler *handler,
108 const char *name);
30c45bdd 109
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110 // common part of HasPending() and Dispatch(): calls select() with the
111 // specified timeout
112 int DoSelect(wxSelectSets& sets, int timeout) const;
113
30c45bdd 114
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115 // the select sets containing all the registered fds
116 wxSelectSets m_sets;
117
118 // the highest registered fd value or -1 if none
119 int m_maxFD;
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120};
121
a1873279 122#endif // wxUSE_SELECT_DISPATCHER
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123
124#endif // _WX_PRIVATE_SOCKETEVTDISPATCH_H_