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/////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/private/gsockmsw.h
// Purpose: MSW-specific socket implementation
// Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia, Vadim Zeitlin
// Created: April 1997
// Copyright: (C) 1999-1997, Guilhem Lavaux
// (C) 1999-2000, Guillermo Rodriguez Garcia
// (C) 2008 Vadim Zeitlin
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_MSW_GSOCKMSW_H_
#define _WX_MSW_GSOCKMSW_H_
#include "wx/msw/wrapwin.h"
#if defined(__CYGWIN__)
//CYGWIN gives annoying warning about runtime stuff if we don't do this
# define USE_SYS_TYPES_FD_SET
# include <sys/types.h>
#endif
#if defined(__CYGWIN__)
#include <winsock.h>
#ifdef __LP64__
// We can't use long in this case because it is 64 bits with Cygwin, so
// use their special type used for working around this instead.
#define wxIoctlSocketArg_t __ms_u_long
#endif
#endif
#ifndef wxIoctlSocketArg_t
#define wxIoctlSocketArg_t u_long
#endif
#define wxCloseSocket closesocket
// ----------------------------------------------------------------------------
// MSW-specific socket implementation
// ----------------------------------------------------------------------------
class wxSocketImplMSW : public wxSocketImpl
{
public:
wxSocketImplMSW(wxSocketBase& wxsocket);
virtual ~wxSocketImplMSW();
virtual wxSocketError GetLastError() const wxOVERRIDE;
virtual void ReenableEvents(wxSocketEventFlags WXUNUSED(flags)) wxOVERRIDE
{
// notifications are never disabled in this implementation, there is no
// need for this as WSAAsyncSelect() only sends notification once when
// the new data becomes available anyhow, so there is no need to do
// anything here
}
virtual void UpdateBlockingState() wxOVERRIDE
{
if ( GetSocketFlags() & wxSOCKET_BLOCK )
{
// Counter-intuitively, we make the socket non-blocking even in
// this case as it is necessary e.g. for Read() to return
// immediately if there is no data available. However we must not
// install a callback for it as blocking sockets don't use any
// events and generating them would actually be harmful (and not
// just useless) as they would be dispatched by the main thread
// while this blocking socket can be used from a worker one, so it
// would result in data races and other unpleasantness.
wxIoctlSocketArg_t trueArg = 1;
ioctlsocket(m_fd, FIONBIO, &trueArg);
// Uninstall it in case it was installed before.
wxSocketManager::Get()->Uninstall_Callback(this);
}
else
{
// No need to make the socket non-blocking, Install_Callback() will
// do it as a side effect of calling WSAAsyncSelect().
wxSocketManager::Get()->Install_Callback(this);
}
}
private:
virtual void DoClose() wxOVERRIDE;
int m_msgnumber;
friend class wxSocketMSWManager;
wxDECLARE_NO_COPY_CLASS(wxSocketImplMSW);
};
#endif /* _WX_MSW_GSOCKMSW_H_ */
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