src/msw/sockmsw.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:       src/msw/sockmsw.cpp
// Purpose:    MSW-specific socket code
// Authors:    Guilhem Lavaux, Guillermo Rodriguez Garcia
// Created:    April 1997
// Copyright:  (C) 1999-1997, Guilhem Lavaux
//             (C) 1999-2000, Guillermo Rodriguez Garcia
//             (C) 2008 Vadim Zeitlin
// RCS_ID:     $Id$
// License:    wxWindows licence
/////////////////////////////////////////////////////////////////////////////


// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_SOCKETS

/* including rasasync.h (included from windows.h itself included from
 * wx/setup.h and/or winsock.h results in this warning for
 * RPCNOTIFICATION_ROUTINE
 */
#ifdef _MSC_VER
#   pragma warning(disable:4115) /* named type definition in parentheses */
#endif

#include "wx/private/socket.h"
#include "wx/msw/private.h"     // for wxGetInstance()
#include "wx/apptrait.h"
#include "wx/thread.h"
#include "wx/dynlib.h"
#include "wx/link.h"

#ifdef __WXWINCE__
/*
 * As WSAAsyncSelect is not present on WinCE, it now uses WSACreateEvent,
 * WSAEventSelect, WSAWaitForMultipleEvents and WSAEnumNetworkEvents. When
 * enabling eventhandling for a socket a new thread it created that keeps track
 * of the events and posts a messageto the hidden window to use the standard
 * message loop.
 */
#include "wx/msw/wince/net.h"
#include "wx/hashmap.h"
WX_DECLARE_HASH_MAP(int,bool,wxIntegerHash,wxIntegerEqual,SocketHash);

#ifndef isdigit
#define isdigit(x) (x > 47 && x < 58)
#endif
#include "wx/msw/wince/net.h"

#endif // __WXWINCE__

#ifdef _MSC_VER
#  pragma warning(default:4115) /* named type definition in parentheses */
#endif

#define CLASSNAME  TEXT("_wxSocket_Internal_Window_Class")

/* implemented in utils.cpp */
extern "C" WXDLLIMPEXP_BASE HWND
wxCreateHiddenWindow(LPCTSTR *pclassname, LPCTSTR classname, WNDPROC wndproc);

/* Maximum number of different wxSocket objects at a given time.
 * This value can be modified at will, but it CANNOT be greater
 * than (0x7FFF - WM_USER + 1)
 */
#define MAXSOCKETS 1024

#if (MAXSOCKETS > (0x7FFF - WM_USER + 1))
#error "MAXSOCKETS is too big!"
#endif

#ifndef __WXWINCE__
typedef int (PASCAL *WSAAsyncSelect_t)(SOCKET,HWND,u_int,long);
#else
/* Typedef the needed function prototypes and the WSANETWORKEVENTS structure
*/
typedef struct _WSANETWORKEVENTS {
       long lNetworkEvents;
       int iErrorCode[10];
} WSANETWORKEVENTS, FAR * LPWSANETWORKEVENTS;
typedef HANDLE (PASCAL *WSACreateEvent_t)();
typedef int (PASCAL *WSAEventSelect_t)(SOCKET,HANDLE,long);
typedef int (PASCAL *WSAWaitForMultipleEvents_t)(long,HANDLE,BOOL,long,BOOL);
typedef int (PASCAL *WSAEnumNetworkEvents_t)(SOCKET,HANDLE,LPWSANETWORKEVENTS);
#endif //__WXWINCE__

LRESULT CALLBACK wxSocket_Internal_WinProc(HWND, UINT, WPARAM, LPARAM);

/* Global variables */

static HWND hWin;
wxCRIT_SECT_DECLARE_MEMBER(gs_critical);
static wxSocketImplMSW *socketList[MAXSOCKETS];
static int firstAvailable;

#ifndef __WXWINCE__
static WSAAsyncSelect_t gs_WSAAsyncSelect = NULL;
#else
static SocketHash socketHash;
static unsigned int currSocket;
HANDLE hThread[MAXSOCKETS];
static WSACreateEvent_t gs_WSACreateEvent = NULL;
static WSAEventSelect_t gs_WSAEventSelect = NULL;
static WSAWaitForMultipleEvents_t gs_WSAWaitForMultipleEvents = NULL;
static WSAEnumNetworkEvents_t gs_WSAEnumNetworkEvents = NULL;
/* This structure will be used to pass data on to the thread that handles socket events.
*/
typedef struct thread_data{
    HWND hEvtWin;
    unsigned long msgnumber;
    unsigned long fd;
    unsigned long lEvent;
}thread_data;
#endif

#ifdef __WXWINCE__
/* This thread handles socket events on WinCE using WSAEventSelect() as
 * WSAAsyncSelect is not supported. When an event occurs for the socket, it is
 * checked what kind of event happend and the correct message gets posted so
 * that the hidden window can handle it as it would in other MSW builds.
*/
DWORD WINAPI SocketThread(LPVOID data)
{
    WSANETWORKEVENTS NetworkEvents;
    thread_data* d = (thread_data *)data;

    HANDLE NetworkEvent = gs_WSACreateEvent();
    gs_WSAEventSelect(d->fd, NetworkEvent, d->lEvent);

    while(socketHash[d->fd] == true)
    {
        if ((gs_WSAWaitForMultipleEvents(1, &NetworkEvent, FALSE,INFINITE, FALSE)) == WAIT_FAILED)
        {
            printf("WSAWaitForMultipleEvents failed with error %d\n", WSAGetLastError());
            return 0;
        }
        if (gs_WSAEnumNetworkEvents(d->fd ,NetworkEvent, &NetworkEvents) == SOCKET_ERROR)
        {
            printf("WSAEnumNetworkEvents failed with error %d\n", WSAGetLastError());
            return 0;
        }

        long flags = NetworkEvents.lNetworkEvents;
        if (flags & FD_READ)
            ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_READ);
        if (flags & FD_WRITE)
            ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_WRITE);
        if (flags & FD_OOB)
            ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_OOB);
        if (flags & FD_ACCEPT)
            ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_ACCEPT);
        if (flags & FD_CONNECT)
            ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_CONNECT);
        if (flags & FD_CLOSE)
            ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_CLOSE);

    }
    gs_WSAEventSelect(d->fd, NetworkEvent, 0);
    ExitThread(0);
    return 0;
}
#endif

// ----------------------------------------------------------------------------
// MSW implementation of wxSocketManager
// ----------------------------------------------------------------------------

class wxSocketMSWManager : public wxSocketManager
{
public:
    virtual bool OnInit();
    virtual void OnExit();

    virtual wxSocketImpl *CreateSocket(wxSocketBase& wxsocket)
    {
        return new wxSocketImplMSW(wxsocket);
    }
    virtual void Install_Callback(wxSocketImpl *socket,
                                  wxSocketNotify event = wxSOCKET_LOST);
    virtual void Uninstall_Callback(wxSocketImpl *socket,
                                    wxSocketNotify event = wxSOCKET_LOST);

private:
    static wxDynamicLibrary gs_wsock32dll;
};

wxDynamicLibrary wxSocketMSWManager::gs_wsock32dll;

bool wxSocketMSWManager::OnInit()
{
  static LPCTSTR pclassname = NULL;
  int i;

  /* Create internal window for event notifications */
  hWin = wxCreateHiddenWindow(&pclassname, CLASSNAME, wxSocket_Internal_WinProc);
  if (!hWin)
      return false;

  /* Initialize socket list */
  for (i = 0; i < MAXSOCKETS; i++)
  {
    socketList[i] = NULL;
  }
  firstAvailable = 0;

  // we don't link with wsock32.dll (or ws2 in CE case) statically to avoid
  // dependencies on it for all the application using wx even if they don't use
  // sockets
#ifdef __WXWINCE__
    #define WINSOCK_DLL_NAME wxT("ws2.dll")
#else
    #define WINSOCK_DLL_NAME wxT("wsock32.dll")
#endif

    gs_wsock32dll.Load(WINSOCK_DLL_NAME, wxDL_VERBATIM | wxDL_QUIET);
    if ( !gs_wsock32dll.IsLoaded() )
        return false;

#ifndef __WXWINCE__
    wxDL_INIT_FUNC(gs_, WSAAsyncSelect, gs_wsock32dll);
    if ( !gs_WSAAsyncSelect )
        return false;
#else
    wxDL_INIT_FUNC(gs_, WSAEventSelect, gs_wsock32dll);
    if ( !gs_WSAEventSelect )
        return false;

    wxDL_INIT_FUNC(gs_, WSACreateEvent, gs_wsock32dll);
    if ( !gs_WSACreateEvent )
        return false;

    wxDL_INIT_FUNC(gs_, WSAWaitForMultipleEvents, gs_wsock32dll);
    if ( !gs_WSAWaitForMultipleEvents )
        return false;

    wxDL_INIT_FUNC(gs_, WSAEnumNetworkEvents, gs_wsock32dll);
    if ( !gs_WSAEnumNetworkEvents )
        return false;

    currSocket = 0;
#endif // !__WXWINCE__/__WXWINCE__

  // finally initialize WinSock
  WSADATA wsaData;
  return WSAStartup((1 << 8) | 1, &wsaData) == 0;
}

void wxSocketMSWManager::OnExit()
{
#ifdef __WXWINCE__
/* Delete the threads here */
    for(unsigned int i=0; i < currSocket; i++)
        CloseHandle(hThread[i]);
#endif
  /* Destroy internal window */
  DestroyWindow(hWin);
  UnregisterClass(CLASSNAME, wxGetInstance());

  WSACleanup();

  gs_wsock32dll.Unload();
}

/* Per-socket GUI initialization / cleanup */

wxSocketImplMSW::wxSocketImplMSW(wxSocketBase& wxsocket)
    : wxSocketImpl(wxsocket)
{
  /* Allocate a new message number for this socket */
  wxCRIT_SECT_LOCKER(lock, gs_critical);

  int i = firstAvailable;
  while (socketList[i] != NULL)
  {
    i = (i + 1) % MAXSOCKETS;

    if (i == firstAvailable)    /* abort! */
    {
      m_msgnumber = 0; // invalid
      return;
    }
  }
  socketList[i] = this;
  firstAvailable = (i + 1) % MAXSOCKETS;
  m_msgnumber = (i + WM_USER);
}

wxSocketImplMSW::~wxSocketImplMSW()
{
  /* Remove the socket from the list */
  wxCRIT_SECT_LOCKER(lock, gs_critical);

  if ( m_msgnumber )
  {
      // we need to remove any pending messages for this socket to avoid having
      // them sent to a new socket which could reuse the same message number as
      // soon as we destroy this one
      MSG msg;
      while ( ::PeekMessage(&msg, hWin, m_msgnumber, m_msgnumber, PM_REMOVE) )
          ;

      socketList[m_msgnumber - WM_USER] = NULL;
  }
  //else: the socket has never been created successfully
}

/* Windows proc for asynchronous event handling */

LRESULT CALLBACK wxSocket_Internal_WinProc(HWND hWnd,
                                           UINT uMsg,
                                           WPARAM wParam,
                                           LPARAM lParam)
{
    if ( uMsg < WM_USER || uMsg > (WM_USER + MAXSOCKETS - 1))
        return DefWindowProc(hWnd, uMsg, wParam, lParam);

    wxSocketImplMSW *socket;
    wxSocketNotify event = (wxSocketNotify)-1;
    {
        wxCRIT_SECT_LOCKER(lock, gs_critical);

        socket = socketList[(uMsg - WM_USER)];
        if ( !socket )
            return 0;

        // the socket may be already closed but we could still receive
        // notifications for it sent (asynchronously) before it got closed
        if ( socket->m_fd == INVALID_SOCKET )
            return 0;

        wxASSERT_MSG( socket->m_fd == (SOCKET)wParam,
                      "mismatch between message and socket?" );

        switch WSAGETSELECTEVENT(lParam)
        {
            case FD_READ:
                event = wxSOCKET_INPUT;
                break;

            case FD_WRITE:
                event = wxSOCKET_OUTPUT;
                break;

            case FD_ACCEPT:
                event = wxSOCKET_CONNECTION;
                break;

            case FD_CONNECT:
                event = WSAGETSELECTERROR(lParam) ? wxSOCKET_LOST
                                                  : wxSOCKET_CONNECTION;
                break;

            case FD_CLOSE:
                event = wxSOCKET_LOST;
                break;

            default:
                wxFAIL_MSG( "unexpected socket notification" );
                return 0;
        }
    } // unlock gs_critical

    socket->NotifyOnStateChange(event);

    return 0;
}

/*
 *  Enable all event notifications; we need to be notified of all
 *  events for internal processing, but we will only notify users
 *  when an appropriate callback function has been installed.
 */
void wxSocketMSWManager::Install_Callback(wxSocketImpl *socket_,
                                         wxSocketNotify WXUNUSED(event))
{
    wxSocketImplMSW * const socket = static_cast<wxSocketImplMSW *>(socket_);

  if (socket->m_fd != INVALID_SOCKET)
  {
    /* We could probably just subscribe to all events regardless
     * of the socket type, but MS recommends to do it this way.
     */
    long lEvent = socket->m_server?
                  FD_ACCEPT : (FD_READ | FD_WRITE | FD_CONNECT | FD_CLOSE);
#ifndef __WXWINCE__
    gs_WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, lEvent);
#else
/*
*  WinCE creates a thread for socket event handling.
*  All needed parameters get passed through the thread_data structure.
*/

    thread_data* d = new thread_data;
    d->lEvent = lEvent;
    d->hEvtWin = hWin;
    d->msgnumber = socket->m_msgnumber;
    d->fd = socket->m_fd;
    socketHash[socket->m_fd] = true;
    hThread[currSocket++] = CreateThread(NULL, 0, &SocketThread,(LPVOID)d, 0, NULL);
#endif
  }
}

/*
 *  Disable event notifications (used when shutting down the socket)
 */
void wxSocketMSWManager::Uninstall_Callback(wxSocketImpl *socket_,
                                            wxSocketNotify WXUNUSED(event))
{
    wxSocketImplMSW * const socket = static_cast<wxSocketImplMSW *>(socket_);

  if (socket->m_fd != INVALID_SOCKET)
  {
#ifndef __WXWINCE__
    gs_WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, 0);
#else
    //Destroy the thread
    socketHash[socket->m_fd] = false;
#endif
  }
}

// set the wxBase variable to point to our wxSocketManager implementation
//
// see comments in wx/apptrait.h for the explanation of why do we do it
// like this
static struct ManagerSetter
{
    ManagerSetter()
    {
        static wxSocketMSWManager s_manager;
        wxAppTraits::SetDefaultSocketManager(&s_manager);
    }
} gs_managerSetter;

// see the relative linker macro in socket.cpp
wxFORCE_LINK_THIS_MODULE( mswsocket );

// ============================================================================
// wxSocketImpl implementation
// ============================================================================

void wxSocketImplMSW::DoClose()
{
    wxSocketManager::Get()->Uninstall_Callback(this);

    closesocket(m_fd);
}

wxSocketError wxSocketImplMSW::GetLastError() const
{
    switch ( WSAGetLastError() )
    {
        case 0:
            return wxSOCKET_NOERROR;

        case WSAENOTSOCK:
            return wxSOCKET_INVSOCK;

        case WSAEWOULDBLOCK:
            return wxSOCKET_WOULDBLOCK;

        default:
            return wxSOCKET_IOERR;
    }
}

#endif  // wxUSE_SOCKETS
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/msw/sockmsw.cpp
	3	// Purpose: MSW-specific socket code
	4	// Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia
	5	// Created: April 1997
	6	// Copyright: (C) 1999-1997, Guilhem Lavaux
	7	// (C) 1999-2000, Guillermo Rodriguez Garcia
	8	// (C) 2008 Vadim Zeitlin
	9	// RCS_ID: $Id$
	10	// License: wxWindows licence
	11	/////////////////////////////////////////////////////////////////////////////
	12
	13
	14	// For compilers that support precompilation, includes "wx.h".
	15	#include "wx/wxprec.h"
	16
	17	#ifdef __BORLANDC__
	18	#pragma hdrstop
	19	#endif
	20
	21	#if wxUSE_SOCKETS
	22
	23	/* including rasasync.h (included from windows.h itself included from
	24	* wx/setup.h and/or winsock.h results in this warning for
	25	* RPCNOTIFICATION_ROUTINE
	26	*/
	27	#ifdef _MSC_VER
	28	# pragma warning(disable:4115) /* named type definition in parentheses */
	29	#endif
	30
	31	#include "wx/private/socket.h"
	32	#include "wx/msw/private.h" // for wxGetInstance()
	33	#include "wx/apptrait.h"
	34	#include "wx/thread.h"
	35	#include "wx/dynlib.h"
	36	#include "wx/link.h"
	37
	38	#ifdef __WXWINCE__
	39	/*
	40	* As WSAAsyncSelect is not present on WinCE, it now uses WSACreateEvent,
	41	* WSAEventSelect, WSAWaitForMultipleEvents and WSAEnumNetworkEvents. When
	42	* enabling eventhandling for a socket a new thread it created that keeps track
	43	* of the events and posts a messageto the hidden window to use the standard
	44	* message loop.
	45	*/
	46	#include "wx/msw/wince/net.h"
	47	#include "wx/hashmap.h"
	48	WX_DECLARE_HASH_MAP(int,bool,wxIntegerHash,wxIntegerEqual,SocketHash);
	49
	50	#ifndef isdigit
	51	#define isdigit(x) (x > 47 && x < 58)
	52	#endif
	53	#include "wx/msw/wince/net.h"
	54
	55	#endif // __WXWINCE__
	56
	57	#ifdef _MSC_VER
	58	# pragma warning(default:4115) /* named type definition in parentheses */
	59	#endif
	60
	61	#define CLASSNAME TEXT("_wxSocket_Internal_Window_Class")
	62
	63	/* implemented in utils.cpp */
	64	extern "C" WXDLLIMPEXP_BASE HWND
	65	wxCreateHiddenWindow(LPCTSTR *pclassname, LPCTSTR classname, WNDPROC wndproc);
	66
	67	/* Maximum number of different wxSocket objects at a given time.
	68	* This value can be modified at will, but it CANNOT be greater
	69	* than (0x7FFF - WM_USER + 1)
	70	*/
	71	#define MAXSOCKETS 1024
	72
	73	#if (MAXSOCKETS > (0x7FFF - WM_USER + 1))
	74	#error "MAXSOCKETS is too big!"
	75	#endif
	76
	77	#ifndef __WXWINCE__
	78	typedef int (PASCAL *WSAAsyncSelect_t)(SOCKET,HWND,u_int,long);
	79	#else
	80	/* Typedef the needed function prototypes and the WSANETWORKEVENTS structure
	81	*/
	82	typedef struct _WSANETWORKEVENTS {
	83	long lNetworkEvents;
	84	int iErrorCode[10];
	85	} WSANETWORKEVENTS, FAR * LPWSANETWORKEVENTS;
	86	typedef HANDLE (PASCAL *WSACreateEvent_t)();
	87	typedef int (PASCAL *WSAEventSelect_t)(SOCKET,HANDLE,long);
	88	typedef int (PASCAL *WSAWaitForMultipleEvents_t)(long,HANDLE,BOOL,long,BOOL);
	89	typedef int (PASCAL *WSAEnumNetworkEvents_t)(SOCKET,HANDLE,LPWSANETWORKEVENTS);
	90	#endif //__WXWINCE__
	91
	92	LRESULT CALLBACK wxSocket_Internal_WinProc(HWND, UINT, WPARAM, LPARAM);
	93
	94	/* Global variables */
	95
	96	static HWND hWin;
	97	wxCRIT_SECT_DECLARE_MEMBER(gs_critical);
	98	static wxSocketImplMSW *socketList[MAXSOCKETS];
	99	static int firstAvailable;
	100
	101	#ifndef __WXWINCE__
	102	static WSAAsyncSelect_t gs_WSAAsyncSelect = NULL;
	103	#else
	104	static SocketHash socketHash;
	105	static unsigned int currSocket;
	106	HANDLE hThread[MAXSOCKETS];
	107	static WSACreateEvent_t gs_WSACreateEvent = NULL;
	108	static WSAEventSelect_t gs_WSAEventSelect = NULL;
	109	static WSAWaitForMultipleEvents_t gs_WSAWaitForMultipleEvents = NULL;
	110	static WSAEnumNetworkEvents_t gs_WSAEnumNetworkEvents = NULL;
	111	/* This structure will be used to pass data on to the thread that handles socket events.
	112	*/
	113	typedef struct thread_data{
	114	HWND hEvtWin;
	115	unsigned long msgnumber;
	116	unsigned long fd;
	117	unsigned long lEvent;
	118	}thread_data;
	119	#endif
	120
	121	#ifdef __WXWINCE__
	122	/* This thread handles socket events on WinCE using WSAEventSelect() as
	123	* WSAAsyncSelect is not supported. When an event occurs for the socket, it is
	124	* checked what kind of event happend and the correct message gets posted so
	125	* that the hidden window can handle it as it would in other MSW builds.
	126	*/
	127	DWORD WINAPI SocketThread(LPVOID data)
	128	{
	129	WSANETWORKEVENTS NetworkEvents;
	130	thread_data* d = (thread_data *)data;
	131
	132	HANDLE NetworkEvent = gs_WSACreateEvent();
	133	gs_WSAEventSelect(d->fd, NetworkEvent, d->lEvent);
	134
	135	while(socketHash[d->fd] == true)
	136	{
	137	if ((gs_WSAWaitForMultipleEvents(1, &NetworkEvent, FALSE,INFINITE, FALSE)) == WAIT_FAILED)
	138	{
	139	printf("WSAWaitForMultipleEvents failed with error %d\n", WSAGetLastError());
	140	return 0;
	141	}
	142	if (gs_WSAEnumNetworkEvents(d->fd ,NetworkEvent, &NetworkEvents) == SOCKET_ERROR)
	143	{
	144	printf("WSAEnumNetworkEvents failed with error %d\n", WSAGetLastError());
	145	return 0;
	146	}
	147
	148	long flags = NetworkEvents.lNetworkEvents;
	149	if (flags & FD_READ)
	150	::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_READ);
	151	if (flags & FD_WRITE)
	152	::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_WRITE);
	153	if (flags & FD_OOB)
	154	::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_OOB);
	155	if (flags & FD_ACCEPT)
	156	::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_ACCEPT);
	157	if (flags & FD_CONNECT)
	158	::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_CONNECT);
	159	if (flags & FD_CLOSE)
	160	::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_CLOSE);
	161
	162	}
	163	gs_WSAEventSelect(d->fd, NetworkEvent, 0);
	164	ExitThread(0);
	165	return 0;
	166	}
	167	#endif
	168
	169	// ----------------------------------------------------------------------------
	170	// MSW implementation of wxSocketManager
	171	// ----------------------------------------------------------------------------
	172
	173	class wxSocketMSWManager : public wxSocketManager
	174	{
	175	public:
	176	virtual bool OnInit();
	177	virtual void OnExit();
	178
	179	virtual wxSocketImpl *CreateSocket(wxSocketBase& wxsocket)
	180	{
	181	return new wxSocketImplMSW(wxsocket);
	182	}
	183	virtual void Install_Callback(wxSocketImpl *socket,
	184	wxSocketNotify event = wxSOCKET_LOST);
	185	virtual void Uninstall_Callback(wxSocketImpl *socket,
	186	wxSocketNotify event = wxSOCKET_LOST);
	187
	188	private:
	189	static wxDynamicLibrary gs_wsock32dll;
	190	};
	191
	192	wxDynamicLibrary wxSocketMSWManager::gs_wsock32dll;
	193
	194	bool wxSocketMSWManager::OnInit()
	195	{
	196	static LPCTSTR pclassname = NULL;
	197	int i;
	198
	199	/* Create internal window for event notifications */
	200	hWin = wxCreateHiddenWindow(&pclassname, CLASSNAME, wxSocket_Internal_WinProc);
	201	if (!hWin)
	202	return false;
	203
	204	/* Initialize socket list */
	205	for (i = 0; i < MAXSOCKETS; i++)
	206	{
	207	socketList[i] = NULL;
	208	}
	209	firstAvailable = 0;
	210
	211	// we don't link with wsock32.dll (or ws2 in CE case) statically to avoid
	212	// dependencies on it for all the application using wx even if they don't use
	213	// sockets
	214	#ifdef __WXWINCE__
	215	#define WINSOCK_DLL_NAME wxT("ws2.dll")
	216	#else
	217	#define WINSOCK_DLL_NAME wxT("wsock32.dll")
	218	#endif
	219
	220	gs_wsock32dll.Load(WINSOCK_DLL_NAME, wxDL_VERBATIM \| wxDL_QUIET);
	221	if ( !gs_wsock32dll.IsLoaded() )
	222	return false;
	223
	224	#ifndef __WXWINCE__
	225	wxDL_INIT_FUNC(gs_, WSAAsyncSelect, gs_wsock32dll);
	226	if ( !gs_WSAAsyncSelect )
	227	return false;
	228	#else
	229	wxDL_INIT_FUNC(gs_, WSAEventSelect, gs_wsock32dll);
	230	if ( !gs_WSAEventSelect )
	231	return false;
	232
	233	wxDL_INIT_FUNC(gs_, WSACreateEvent, gs_wsock32dll);
	234	if ( !gs_WSACreateEvent )
	235	return false;
	236
	237	wxDL_INIT_FUNC(gs_, WSAWaitForMultipleEvents, gs_wsock32dll);
	238	if ( !gs_WSAWaitForMultipleEvents )
	239	return false;
	240
	241	wxDL_INIT_FUNC(gs_, WSAEnumNetworkEvents, gs_wsock32dll);
	242	if ( !gs_WSAEnumNetworkEvents )
	243	return false;
	244
	245	currSocket = 0;
	246	#endif // !__WXWINCE__/__WXWINCE__
	247
	248	// finally initialize WinSock
	249	WSADATA wsaData;
	250	return WSAStartup((1 << 8) \| 1, &wsaData) == 0;
	251	}
	252
	253	void wxSocketMSWManager::OnExit()
	254	{
	255	#ifdef __WXWINCE__
	256	/* Delete the threads here */
	257	for(unsigned int i=0; i < currSocket; i++)
	258	CloseHandle(hThread[i]);
	259	#endif
	260	/* Destroy internal window */
	261	DestroyWindow(hWin);
	262	UnregisterClass(CLASSNAME, wxGetInstance());
	263
	264	WSACleanup();
	265
	266	gs_wsock32dll.Unload();
	267	}
	268
	269	/* Per-socket GUI initialization / cleanup */
	270
	271	wxSocketImplMSW::wxSocketImplMSW(wxSocketBase& wxsocket)
	272	: wxSocketImpl(wxsocket)
	273	{
	274	/* Allocate a new message number for this socket */
	275	wxCRIT_SECT_LOCKER(lock, gs_critical);
	276
	277	int i = firstAvailable;
	278	while (socketList[i] != NULL)
	279	{
	280	i = (i + 1) % MAXSOCKETS;
	281
	282	if (i == firstAvailable) /* abort! */
	283	{
	284	m_msgnumber = 0; // invalid
	285	return;
	286	}
	287	}
	288	socketList[i] = this;
	289	firstAvailable = (i + 1) % MAXSOCKETS;
	290	m_msgnumber = (i + WM_USER);
	291	}
	292
	293	wxSocketImplMSW::~wxSocketImplMSW()
	294	{
	295	/* Remove the socket from the list */
	296	wxCRIT_SECT_LOCKER(lock, gs_critical);
	297
	298	if ( m_msgnumber )
	299	{
	300	// we need to remove any pending messages for this socket to avoid having
	301	// them sent to a new socket which could reuse the same message number as
	302	// soon as we destroy this one
	303	MSG msg;
	304	while ( ::PeekMessage(&msg, hWin, m_msgnumber, m_msgnumber, PM_REMOVE) )
	305	;
	306
	307	socketList[m_msgnumber - WM_USER] = NULL;
	308	}
	309	//else: the socket has never been created successfully
	310	}
	311
	312	/* Windows proc for asynchronous event handling */
	313
	314	LRESULT CALLBACK wxSocket_Internal_WinProc(HWND hWnd,
	315	UINT uMsg,
	316	WPARAM wParam,
	317	LPARAM lParam)
	318	{
	319	if ( uMsg < WM_USER \|\| uMsg > (WM_USER + MAXSOCKETS - 1))
	320	return DefWindowProc(hWnd, uMsg, wParam, lParam);
	321
	322	wxSocketImplMSW *socket;
	323	wxSocketNotify event = (wxSocketNotify)-1;
	324	{
	325	wxCRIT_SECT_LOCKER(lock, gs_critical);
	326
	327	socket = socketList[(uMsg - WM_USER)];
	328	if ( !socket )
	329	return 0;
	330
	331	// the socket may be already closed but we could still receive
	332	// notifications for it sent (asynchronously) before it got closed
	333	if ( socket->m_fd == INVALID_SOCKET )
	334	return 0;
	335
	336	wxASSERT_MSG( socket->m_fd == (SOCKET)wParam,
	337	"mismatch between message and socket?" );
	338
	339	switch WSAGETSELECTEVENT(lParam)
	340	{
	341	case FD_READ:
	342	event = wxSOCKET_INPUT;
	343	break;
	344
	345	case FD_WRITE:
	346	event = wxSOCKET_OUTPUT;
	347	break;
	348
	349	case FD_ACCEPT:
	350	event = wxSOCKET_CONNECTION;
	351	break;
	352
	353	case FD_CONNECT:
	354	event = WSAGETSELECTERROR(lParam) ? wxSOCKET_LOST
	355	: wxSOCKET_CONNECTION;
	356	break;
	357
	358	case FD_CLOSE:
	359	event = wxSOCKET_LOST;
	360	break;
	361
	362	default:
	363	wxFAIL_MSG( "unexpected socket notification" );
	364	return 0;
	365	}
	366	} // unlock gs_critical
	367
	368	socket->NotifyOnStateChange(event);
	369
	370	return 0;
	371	}
	372
	373	/*
	374	* Enable all event notifications; we need to be notified of all
	375	* events for internal processing, but we will only notify users
	376	* when an appropriate callback function has been installed.
	377	*/
	378	void wxSocketMSWManager::Install_Callback(wxSocketImpl *socket_,
	379	wxSocketNotify WXUNUSED(event))
	380	{
	381	wxSocketImplMSW * const socket = static_cast<wxSocketImplMSW *>(socket_);
	382
	383	if (socket->m_fd != INVALID_SOCKET)
	384	{
	385	/* We could probably just subscribe to all events regardless
	386	* of the socket type, but MS recommends to do it this way.
	387	*/
	388	long lEvent = socket->m_server?
	389	FD_ACCEPT : (FD_READ \| FD_WRITE \| FD_CONNECT \| FD_CLOSE);
	390	#ifndef __WXWINCE__
	391	gs_WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, lEvent);
	392	#else
	393	/*
	394	* WinCE creates a thread for socket event handling.
	395	* All needed parameters get passed through the thread_data structure.
	396	*/
	397
	398	thread_data* d = new thread_data;
	399	d->lEvent = lEvent;
	400	d->hEvtWin = hWin;
	401	d->msgnumber = socket->m_msgnumber;
	402	d->fd = socket->m_fd;
	403	socketHash[socket->m_fd] = true;
	404	hThread[currSocket++] = CreateThread(NULL, 0, &SocketThread,(LPVOID)d, 0, NULL);
	405	#endif
	406	}
	407	}
	408
	409	/*
	410	* Disable event notifications (used when shutting down the socket)
	411	*/
	412	void wxSocketMSWManager::Uninstall_Callback(wxSocketImpl *socket_,
	413	wxSocketNotify WXUNUSED(event))
	414	{
	415	wxSocketImplMSW * const socket = static_cast<wxSocketImplMSW *>(socket_);
	416
	417	if (socket->m_fd != INVALID_SOCKET)
	418	{
	419	#ifndef __WXWINCE__
	420	gs_WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, 0);
	421	#else
	422	//Destroy the thread
	423	socketHash[socket->m_fd] = false;
	424	#endif
	425	}
	426	}
	427
	428	// set the wxBase variable to point to our wxSocketManager implementation
	429	//
	430	// see comments in wx/apptrait.h for the explanation of why do we do it
	431	// like this
	432	static struct ManagerSetter
	433	{
	434	ManagerSetter()
	435	{
	436	static wxSocketMSWManager s_manager;
	437	wxAppTraits::SetDefaultSocketManager(&s_manager);
	438	}
	439	} gs_managerSetter;
	440
	441	// see the relative linker macro in socket.cpp
	442	wxFORCE_LINK_THIS_MODULE( mswsocket );
	443
	444	// ============================================================================
	445	// wxSocketImpl implementation
	446	// ============================================================================
	447
	448	void wxSocketImplMSW::DoClose()
	449	{
	450	wxSocketManager::Get()->Uninstall_Callback(this);
	451
	452	closesocket(m_fd);
	453	}
	454
	455	wxSocketError wxSocketImplMSW::GetLastError() const
	456	{
	457	switch ( WSAGetLastError() )
	458	{
	459	case 0:
	460	return wxSOCKET_NOERROR;
	461
	462	case WSAENOTSOCK:
	463	return wxSOCKET_INVSOCK;
	464
	465	case WSAEWOULDBLOCK:
	466	return wxSOCKET_WOULDBLOCK;
	467
	468	default:
	469	return wxSOCKET_IOERR;
	470	}
	471	}
	472
	473	#endif // wxUSE_SOCKETS