127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/private/selectdispatcher.h
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// Purpose: wxSelectDispatcher class
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// Authors: Lukasz Michalski and Vadim Zeitlin
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// Created: December 2006
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// Copyright: (c) Lukasz Michalski
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_PRIVATE_SELECTDISPATCHER_H_
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#define _WX_PRIVATE_SELECTDISPATCHER_H_
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#include "wx/defs.h"
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#if wxUSE_SELECT_DISPATCHER
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#if defined(HAVE_SYS_SELECT_H) || defined(__WATCOMC__)
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#include <sys/time.h>
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#include <sys/select.h>
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#endif
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#ifdef __WATCOMC__
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#include <types.h>
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#include <sys/ioctl.h>
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#include <tcpustd.h>
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#else
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#include <sys/types.h>
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#endif
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#include "wx/private/fdiodispatcher.h"
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// helper class storing all the select() fd sets
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class WXDLLIMPEXP_BASE wxSelectSets
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{
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public:
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// ctor zeroes out all fd_sets
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wxSelectSets();
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// default copy ctor, assignment operator and dtor are ok
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// return true if fd appears in any of the sets
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bool HasFD(int fd) const;
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// add or remove FD to our sets depending on whether flags contains
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// wxFDIO_INPUT/OUTPUT/EXCEPTION bits
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bool SetFD(int fd, int flags);
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// same as SetFD() except it unsets the bits set in the flags for the given
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// fd
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bool ClearFD(int fd)
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{
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return SetFD(fd, 0);
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}
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// call select() with our sets: the other parameters are the same as for
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// select() itself
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int Select(int nfds, struct timeval *tv);
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// call the handler methods corresponding to the sets having this fd if it
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// is present in any set and return true if it is
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bool Handle(int fd, wxFDIOHandler& handler) const;
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private:
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typedef void (wxFDIOHandler::*Callback)();
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// the FD sets indices
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enum
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{
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Read,
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Write,
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Except,
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Max
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};
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// the sets used with select()
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fd_set m_fds[Max];
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// the wxFDIO_XXX flags, functions and names (used for debug messages only)
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// corresponding to the FD sets above
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static int ms_flags[Max];
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static const char *ms_names[Max];
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static Callback ms_handlers[Max];
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};
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class WXDLLIMPEXP_BASE wxSelectDispatcher : public wxMappedFDIODispatcher
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{
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public:
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// default ctor
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wxSelectDispatcher() { m_maxFD = -1; }
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// implement pure virtual methods of the base class
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virtual bool RegisterFD(int fd, wxFDIOHandler *handler, int flags = wxFDIO_ALL);
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virtual bool ModifyFD(int fd, wxFDIOHandler *handler, int flags = wxFDIO_ALL);
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virtual bool UnregisterFD(int fd);
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virtual bool HasPending() const;
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virtual int Dispatch(int timeout = TIMEOUT_INFINITE);
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private:
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// common part of RegisterFD() and ModifyFD()
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bool DoUpdateFDAndHandler(int fd, wxFDIOHandler *handler, int flags);
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// call the handlers for the fds present in the given sets, return the
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// number of handlers we called
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int ProcessSets(const wxSelectSets& sets);
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// helper of ProcessSets(): call the handler if its fd is in the set
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void DoProcessFD(int fd, const fd_set& fds, wxFDIOHandler *handler,
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const char *name);
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// common part of HasPending() and Dispatch(): calls select() with the
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// specified timeout
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int DoSelect(wxSelectSets& sets, int timeout) const;
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// the select sets containing all the registered fds
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wxSelectSets m_sets;
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// the highest registered fd value or -1 if none
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int m_maxFD;
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};
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#endif // wxUSE_SELECT_DISPATCHER
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#endif // _WX_PRIVATE_SOCKETEVTDISPATCH_H_
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