68a8d6a11c
This is unnecessary at least since removal of Windows CE support back in
8282c1be0f (Remove Windows CE support, 2015-08-27) and probably for much
longer.
307 lines
8.7 KiB
C++
307 lines
8.7 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/msw/sockmsw.cpp
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// Purpose: MSW-specific socket code
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// Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia
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// Created: April 1997
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// Copyright: (C) 1999-1997, Guilhem Lavaux
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// (C) 1999-2000, Guillermo Rodriguez Garcia
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// (C) 2008 Vadim Zeitlin
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#if wxUSE_SOCKETS
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/* including rasasync.h (included from windows.h itself included from
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* wx/setup.h and/or winsock.h results in this warning for
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* RPCNOTIFICATION_ROUTINE
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*/
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#ifdef _MSC_VER
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# pragma warning(disable:4115) /* named type definition in parentheses */
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#endif
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#include "wx/private/socket.h"
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#include "wx/msw/private.h" // for wxGetInstance()
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#include "wx/private/fd.h"
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#include "wx/apptrait.h"
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#include "wx/thread.h"
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#include "wx/link.h"
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#ifdef _MSC_VER
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# pragma warning(default:4115) /* named type definition in parentheses */
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#endif
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#include "wx/msw/private/hiddenwin.h"
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#define CLASSNAME TEXT("_wxSocket_Internal_Window_Class")
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/* Maximum number of different wxSocket objects at a given time.
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* This value can be modified at will, but it CANNOT be greater
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* than (0x7FFF - WM_USER + 1)
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*/
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#define MAXSOCKETS 1024
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#if (MAXSOCKETS > (0x7FFF - WM_USER + 1))
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#error "MAXSOCKETS is too big!"
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#endif
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LRESULT CALLBACK wxSocket_Internal_WinProc(HWND, UINT, WPARAM, LPARAM);
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/* Global variables */
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static HWND hWin;
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wxCRIT_SECT_DECLARE_MEMBER(gs_critical);
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static wxSocketImplMSW *socketList[MAXSOCKETS];
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static int firstAvailable;
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// ----------------------------------------------------------------------------
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// MSW implementation of wxSocketManager
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// ----------------------------------------------------------------------------
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class wxSocketMSWManager : public wxSocketManager
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{
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public:
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virtual bool OnInit() wxOVERRIDE;
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virtual void OnExit() wxOVERRIDE;
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virtual wxSocketImpl *CreateSocket(wxSocketBase& wxsocket) wxOVERRIDE
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{
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return new wxSocketImplMSW(wxsocket);
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}
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virtual void Install_Callback(wxSocketImpl *socket,
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wxSocketNotify event = wxSOCKET_LOST) wxOVERRIDE;
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virtual void Uninstall_Callback(wxSocketImpl *socket,
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wxSocketNotify event = wxSOCKET_LOST) wxOVERRIDE;
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};
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bool wxSocketMSWManager::OnInit()
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{
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LPCTSTR pclassname = NULL;
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int i;
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/* Create internal window for event notifications */
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hWin = wxCreateHiddenWindow(&pclassname, CLASSNAME, wxSocket_Internal_WinProc);
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if (!hWin)
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return false;
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/* Initialize socket list */
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for (i = 0; i < MAXSOCKETS; i++)
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{
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socketList[i] = NULL;
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}
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firstAvailable = 0;
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// finally initialize WinSock
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WSADATA wsaData;
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return WSAStartup((1 << 8) | 1, &wsaData) == 0;
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}
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void wxSocketMSWManager::OnExit()
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{
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/* Destroy internal window */
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DestroyWindow(hWin);
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UnregisterClass(CLASSNAME, wxGetInstance());
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WSACleanup();
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}
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/* Per-socket GUI initialization / cleanup */
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wxSocketImplMSW::wxSocketImplMSW(wxSocketBase& wxsocket)
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: wxSocketImpl(wxsocket)
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{
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/* Allocate a new message number for this socket */
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wxCRIT_SECT_LOCKER(lock, gs_critical);
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int i = firstAvailable;
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while (socketList[i] != NULL)
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{
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i = (i + 1) % MAXSOCKETS;
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if (i == firstAvailable) /* abort! */
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{
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m_msgnumber = 0; // invalid
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return;
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}
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}
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socketList[i] = this;
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firstAvailable = (i + 1) % MAXSOCKETS;
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m_msgnumber = (i + WM_USER);
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}
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wxSocketImplMSW::~wxSocketImplMSW()
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{
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/* Remove the socket from the list */
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wxCRIT_SECT_LOCKER(lock, gs_critical);
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if ( m_msgnumber )
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{
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// we need to remove any pending messages for this socket to avoid having
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// them sent to a new socket which could reuse the same message number as
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// soon as we destroy this one
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MSG msg;
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while ( ::PeekMessage(&msg, hWin, m_msgnumber, m_msgnumber, PM_REMOVE) )
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;
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socketList[m_msgnumber - WM_USER] = NULL;
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}
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//else: the socket has never been created successfully
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}
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/* Windows proc for asynchronous event handling */
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LRESULT CALLBACK wxSocket_Internal_WinProc(HWND hWnd,
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UINT uMsg,
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WPARAM wParam,
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LPARAM lParam)
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{
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if ( uMsg < WM_USER || uMsg > (WM_USER + MAXSOCKETS - 1))
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return DefWindowProc(hWnd, uMsg, wParam, lParam);
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wxSocketImplMSW *socket;
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wxSocketNotify event = (wxSocketNotify)-1;
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{
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wxCRIT_SECT_LOCKER(lock, gs_critical);
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socket = socketList[(uMsg - WM_USER)];
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if ( !socket )
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return 0;
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// the socket may be already closed but we could still receive
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// notifications for it sent (asynchronously) before it got closed
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if ( socket->m_fd == INVALID_SOCKET )
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return 0;
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wxASSERT_MSG( socket->m_fd == (SOCKET)wParam,
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"mismatch between message and socket?" );
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switch ( WSAGETSELECTEVENT(lParam) )
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{
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case FD_READ:
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// We may get a FD_READ notification even when there is no data
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// to read on the socket, in particular this happens on socket
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// creation when we seem to always get FD_CONNECT, FD_WRITE and
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// FD_READ notifications all at once (but it doesn't happen
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// only then). Ignore such dummy notifications.
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{
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fd_set fds;
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wxTimeVal_t tv = { 0, 0 };
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wxFD_ZERO(&fds);
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wxFD_SET(socket->m_fd, &fds);
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if ( select(socket->m_fd + 1, &fds, NULL, NULL, &tv) != 1 )
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return 0;
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}
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event = wxSOCKET_INPUT;
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break;
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case FD_WRITE:
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event = wxSOCKET_OUTPUT;
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break;
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case FD_ACCEPT:
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event = wxSOCKET_CONNECTION;
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break;
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case FD_CONNECT:
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event = WSAGETSELECTERROR(lParam) ? wxSOCKET_LOST
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: wxSOCKET_CONNECTION;
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break;
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case FD_CLOSE:
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event = wxSOCKET_LOST;
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break;
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default:
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wxFAIL_MSG( "unexpected socket notification" );
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return 0;
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}
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} // unlock gs_critical
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socket->NotifyOnStateChange(event);
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return 0;
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}
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/*
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* Enable all event notifications; we need to be notified of all
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* events for internal processing, but we will only notify users
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* when an appropriate callback function has been installed.
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*/
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void wxSocketMSWManager::Install_Callback(wxSocketImpl *socket_,
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wxSocketNotify WXUNUSED(event))
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{
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wxSocketImplMSW * const socket = static_cast<wxSocketImplMSW *>(socket_);
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/* We could probably just subscribe to all events regardless
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* of the socket type, but MS recommends to do it this way.
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*/
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long lEvent = socket->m_server?
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FD_ACCEPT : (FD_READ | FD_WRITE | FD_CONNECT | FD_CLOSE);
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WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, lEvent);
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}
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/*
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* Disable event notifications (used when shutting down the socket)
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*/
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void wxSocketMSWManager::Uninstall_Callback(wxSocketImpl *socket_,
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wxSocketNotify WXUNUSED(event))
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{
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wxSocketImplMSW * const socket = static_cast<wxSocketImplMSW *>(socket_);
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WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, 0);
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}
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// set the wxBase variable to point to our wxSocketManager implementation
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//
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// see comments in wx/apptrait.h for the explanation of why do we do it
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// like this
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static struct ManagerSetter
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{
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ManagerSetter()
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{
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static wxSocketMSWManager s_manager;
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wxAppTraits::SetDefaultSocketManager(&s_manager);
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}
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} gs_managerSetter;
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// see the relative linker macro in socket.cpp
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wxFORCE_LINK_THIS_MODULE( mswsocket );
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// ============================================================================
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// wxSocketImpl implementation
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// ============================================================================
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void wxSocketImplMSW::DoClose()
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{
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wxSocketManager::Get()->Uninstall_Callback(this);
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wxCloseSocket(m_fd);
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}
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wxSocketError wxSocketImplMSW::GetLastError() const
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{
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switch ( WSAGetLastError() )
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{
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case 0:
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return wxSOCKET_NOERROR;
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case WSAENOTSOCK:
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return wxSOCKET_INVSOCK;
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case WSAEWOULDBLOCK:
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return wxSOCKET_WOULDBLOCK;
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default:
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return wxSOCKET_IOERR;
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}
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}
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#endif // wxUSE_SOCKETS
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