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1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: src/common/fdiodispatcher.cpp
3 // Purpose: Implementation of common wxFDIODispatcher methods
4 // Author: Vadim Zeitlin
5 // Created: 2007-05-13
6 // Copyright: (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
7 // Licence: wxWindows licence
8 ///////////////////////////////////////////////////////////////////////////////
9
10 // ============================================================================
11 // declarations
12 // ============================================================================
13
14 // ----------------------------------------------------------------------------
15 // headers
16 // ----------------------------------------------------------------------------
17
18 // for compilers that support precompilation, includes "wx.h".
19 #include "wx/wxprec.h"
20
21 #ifdef __BORLANDC__
22 #pragma hdrstop
23 #endif
24
25 #ifndef WX_PRECOMP
26 #include "wx/module.h"
27 #endif //WX_PRECOMP
28
29 #include "wx/private/fdiodispatcher.h"
30
31 #include "wx/private/selectdispatcher.h"
32 #ifdef __UNIX__
33 #include "wx/unix/private/epolldispatcher.h"
34 #endif
35
36 wxFDIODispatcher *gs_dispatcher = NULL;
37
38 // ============================================================================
39 // implementation
40 // ============================================================================
41
42 // ----------------------------------------------------------------------------
43 // wxFDIODispatcher
44 // ----------------------------------------------------------------------------
45
46 /* static */
47 wxFDIODispatcher *wxFDIODispatcher::Get()
48 {
49 if ( !gs_dispatcher )
50 {
51 #if wxUSE_EPOLL_DISPATCHER
52 gs_dispatcher = wxEpollDispatcher::Create();
53 if ( !gs_dispatcher )
54 #endif // wxUSE_EPOLL_DISPATCHER
55 #if wxUSE_SELECT_DISPATCHER
56 gs_dispatcher = new wxSelectDispatcher();
57 #endif // wxUSE_SELECT_DISPATCHER
58 }
59
60 wxASSERT_MSG( gs_dispatcher, "failed to create any IO dispatchers" );
61
62 return gs_dispatcher;
63 }
64
65 /* static */
66 void wxFDIODispatcher::DispatchPending()
67 {
68 if ( gs_dispatcher )
69 gs_dispatcher->Dispatch(0);
70 }
71
72 // ----------------------------------------------------------------------------
73 // wxMappedFDIODispatcher
74 // ----------------------------------------------------------------------------
75
76 wxFDIOHandler *wxMappedFDIODispatcher::FindHandler(int fd) const
77 {
78 const wxFDIOHandlerMap::const_iterator it = m_handlers.find(fd);
79
80 return it == m_handlers.end() ? NULL : it->second.handler;
81 }
82
83
84 bool
85 wxMappedFDIODispatcher::RegisterFD(int fd, wxFDIOHandler *handler, int flags)
86 {
87 wxCHECK_MSG( handler, false, "handler can't be NULL" );
88
89 // notice that it's not an error to register a handler for the same fd
90 // twice as it can be done with different flags -- but it is an error to
91 // register different handlers
92 wxFDIOHandlerMap::iterator i = m_handlers.find(fd);
93 if ( i != m_handlers.end() )
94 {
95 wxASSERT_MSG( i->second.handler == handler,
96 "registering different handler for the same fd?" );
97 wxASSERT_MSG( i->second.flags != flags,
98 "reregistering with the same flags?" );
99 }
100
101 m_handlers[fd] = wxFDIOHandlerEntry(handler, flags);
102
103 return true;
104 }
105
106 bool
107 wxMappedFDIODispatcher::ModifyFD(int fd, wxFDIOHandler *handler, int flags)
108 {
109 wxCHECK_MSG( handler, false, "handler can't be NULL" );
110
111 wxFDIOHandlerMap::iterator i = m_handlers.find(fd);
112 wxCHECK_MSG( i != m_handlers.end(), false,
113 "modifying unregistered handler?" );
114
115 i->second = wxFDIOHandlerEntry(handler, flags);
116
117 return true;
118 }
119
120 bool wxMappedFDIODispatcher::UnregisterFD(int fd)
121 {
122 wxFDIOHandlerMap::iterator i = m_handlers.find(fd);
123 if ( i == m_handlers.end() )
124 return false;
125
126 m_handlers.erase(i);
127
128 return true;
129 }
130
131 // ----------------------------------------------------------------------------
132 // wxSelectDispatcherModule
133 // ----------------------------------------------------------------------------
134
135 class wxFDIODispatcherModule : public wxModule
136 {
137 public:
138 virtual bool OnInit() { return true; }
139 virtual void OnExit() { wxDELETE(gs_dispatcher); }
140
141 private:
142 DECLARE_DYNAMIC_CLASS(wxFDIODispatcherModule)
143 };
144
145 IMPLEMENT_DYNAMIC_CLASS(wxFDIODispatcherModule, wxModule)