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