XML import corrections

[wxWidgets.git] / src / common / socket.cpp

diff --git a/src/common/socket.cpp b/src/common/socket.cpp
index 88937119b1e04d4caa719a3785cc13f7f1e9b999..64803df7a4f527d76a9bfc4c280c64ed774b1dbd 100644 (file)
--- a/src/common/socket.cpp
+++ b/src/common/socket.cpp
@@ -7,7 +7,7 @@
 //             (C) 1999-2000, Guillermo Rodriguez Garcia
 //             (C) 2008 Vadim Zeitlin
 // RCS_ID:     $Id$
 //             (C) 1999-2000, Guillermo Rodriguez Garcia
 //             (C) 2008 Vadim Zeitlin
 // RCS_ID:     $Id$

-// License:    wxWindows licence
+// Licence:    wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 // ==========================================================================
 /////////////////////////////////////////////////////////////////////////////
 
 // ==========================================================================


@@ -42,6 +42,7 @@
 #include "wx/stopwatch.h"
 #include "wx/thread.h"
 #include "wx/evtloop.h"
 #include "wx/stopwatch.h"
 #include "wx/thread.h"
 #include "wx/evtloop.h"

+#include "wx/link.h"

 
 #include "wx/private/fd.h"
 #include "wx/private/socket.h"
 
 #include "wx/private/fd.h"
 #include "wx/private/socket.h"


@@ -57,13 +58,45 @@
 // this should cover all the current Unix systems (Windows never sends any
 // signals anyhow) but if we find one that has neither we should explicitly
 // ignore SIGPIPE for it
 // this should cover all the current Unix systems (Windows never sends any
 // signals anyhow) but if we find one that has neither we should explicitly
 // ignore SIGPIPE for it

+// OpenVMS has neither MSG_NOSIGNAL nor SO_NOSIGPIPE. However the socket sample
+// seems to work. Not sure if problems will show up on OpenVMS using sockets.

 #ifdef MSG_NOSIGNAL
     #define wxSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL
 #else // MSG_NOSIGNAL not available (BSD including OS X)
 #ifdef MSG_NOSIGNAL
     #define wxSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL
 #else // MSG_NOSIGNAL not available (BSD including OS X)

+    // next best possibility is to use SO_NOSIGPIPE socket option, this covers
+    // BSD systems (including OS X) -- but if we don't have it neither (AIX and
+    // old HP-UX do not), we have to fall back to the old way of simply
+    // disabling SIGPIPE temporarily, so define a class to do it in a safe way

     #if defined(__UNIX__) && !defined(SO_NOSIGPIPE)
     #if defined(__UNIX__) && !defined(SO_NOSIGPIPE)

-        #error "Writing to socket could generate unhandled SIGPIPE."
-        #error "Please post information about your system to wx-dev."
-    #endif
+    extern "C" { typedef void (*wxSigHandler_t)(int); }
+    namespace
+    {
+        class IgnoreSignal
+        {
+        public:
+            // ctor disables the given signal
+            IgnoreSignal(int sig)
+                : m_handler(signal(sig, SIG_IGN)),
+                  m_sig(sig)
+            {
+            }
+
+            // dtor restores the old handler
+            ~IgnoreSignal()
+            {
+                signal(m_sig, m_handler);
+            }
+
+        private:
+            const wxSigHandler_t m_handler;
+            const int m_sig;
+
+            wxDECLARE_NO_COPY_CLASS(IgnoreSignal);
+        };
+    } // anonymous namespace
+
+    #define wxNEEDS_IGNORE_SIGPIPE
+    #endif // Unix without SO_NOSIGPIPE

 
     #define wxSOCKET_MSG_NOSIGNAL 0
 #endif
 
     #define wxSOCKET_MSG_NOSIGNAL 0
 #endif


@@ -76,10 +109,13 @@ WX_CHECK_BUILD_OPTIONS("wxNet")
 // macros and constants
 // --------------------------------------------------------------------------
 
 // macros and constants
 // --------------------------------------------------------------------------
 

+// event
+wxDEFINE_EVENT(wxEVT_SOCKET, wxSocketEvent);
+

 // discard buffer
 #define MAX_DISCARD_SIZE (10 * 1024)
 
 // discard buffer
 #define MAX_DISCARD_SIZE (10 * 1024)
 

-#define wxTRACE_Socket _T("wxSocket")
+#define wxTRACE_Socket wxT("wxSocket")

 
 // --------------------------------------------------------------------------
 // wxWin macros
 
 // --------------------------------------------------------------------------
 // wxWin macros


@@ -121,7 +157,7 @@ public:
 public:
     wxSocketState() : wxObject() {}
 
 public:
     wxSocketState() : wxObject() {}
 

-    DECLARE_NO_COPY_CLASS(wxSocketState)
+    wxDECLARE_NO_COPY_CLASS(wxSocketState);

 };
 
 // wxSocketWaitModeChanger: temporarily change the socket flags affecting its
 };
 
 // wxSocketWaitModeChanger: temporarily change the socket flags affecting its


@@ -157,7 +193,7 @@ private:
     wxSocketBase * const m_socket;
     const int m_oldflags;
 
     wxSocketBase * const m_socket;
     const int m_oldflags;
 

-    DECLARE_NO_COPY_CLASS(wxSocketWaitModeChanger)
+    wxDECLARE_NO_COPY_CLASS(wxSocketWaitModeChanger);

 };
 
 // wxSocketRead/WriteGuard are instantiated before starting reading
 };
 
 // wxSocketRead/WriteGuard are instantiated before starting reading


@@ -177,13 +213,17 @@ public:
     {
         m_socket->m_reading = false;
 
     {
         m_socket->m_reading = false;
 

-        m_socket->m_impl->ReenableEvents(wxSOCKET_INPUT_FLAG);
+        // connection could have been lost while reading, in this case calling
+        // ReenableEvents() would assert and is not necessary anyhow
+        wxSocketImpl * const impl = m_socket->m_impl;
+        if ( impl && impl->m_fd != INVALID_SOCKET )
+            impl->ReenableEvents(wxSOCKET_INPUT_FLAG);

     }
 
 private:
     wxSocketBase * const m_socket;
 
     }
 
 private:
     wxSocketBase * const m_socket;
 

-    DECLARE_NO_COPY_CLASS(wxSocketReadGuard)
+    wxDECLARE_NO_COPY_CLASS(wxSocketReadGuard);

 };
 
 class wxSocketWriteGuard
 };
 
 class wxSocketWriteGuard


@@ -195,19 +235,21 @@ public:
         wxASSERT_MSG( !m_socket->m_writing, "write reentrancy?" );
 
         m_socket->m_writing = true;
         wxASSERT_MSG( !m_socket->m_writing, "write reentrancy?" );
 
         m_socket->m_writing = true;

-
-        m_socket->m_impl->ReenableEvents(wxSOCKET_OUTPUT_FLAG);

     }
 
     ~wxSocketWriteGuard()
     {
         m_socket->m_writing = false;
     }
 
     ~wxSocketWriteGuard()
     {
         m_socket->m_writing = false;

+
+        wxSocketImpl * const impl = m_socket->m_impl;
+        if ( impl && impl->m_fd != INVALID_SOCKET )
+            impl->ReenableEvents(wxSOCKET_OUTPUT_FLAG);

     }
 
 private:
     wxSocketBase * const m_socket;
 
     }
 
 private:
     wxSocketBase * const m_socket;
 

-    DECLARE_NO_COPY_CLASS(wxSocketWriteGuard)
+    wxDECLARE_NO_COPY_CLASS(wxSocketWriteGuard);

 };
 
 // ============================================================================
 };
 
 // ============================================================================


@@ -328,6 +370,14 @@ void wxSocketImpl::PostCreation()
 
 wxSocketError wxSocketImpl::UpdateLocalAddress()
 {
 
 wxSocketError wxSocketImpl::UpdateLocalAddress()
 {

+    if ( !m_local.IsOk() )
+    {
+        // ensure that we have a valid object using the correct family: correct
+        // being the same one as our peer uses as we have no other way to
+        // determine it
+        m_local.Create(m_peer.GetFamily());
+    }
+

     WX_SOCKLEN_T lenAddr = m_local.GetLen();
     if ( getsockname(m_fd, m_local.GetWritableAddr(), &lenAddr) != 0 )
     {
     WX_SOCKLEN_T lenAddr = m_local.GetLen();
     if ( getsockname(m_fd, m_local.GetWritableAddr(), &lenAddr) != 0 )
     {


@@ -483,7 +533,14 @@ wxSocketImpl *wxSocketImpl::Accept(wxSocketBase& wxsocket)
     if ( fd == INVALID_SOCKET )
         return NULL;
 
     if ( fd == INVALID_SOCKET )
         return NULL;
 

-    wxSocketImpl * const sock = Create(wxsocket);
+    wxSocketManager * const manager = wxSocketManager::Get();
+    if ( !manager )
+        return NULL;
+
+    wxSocketImpl * const sock = manager->CreateSocket(wxsocket);
+    if ( !sock )
+        return NULL;
+

     sock->m_fd = fd;
     sock->m_peer = wxSockAddressImpl(from.addr, fromlen);
 
     sock->m_fd = fd;
     sock->m_peer = wxSockAddressImpl(from.addr, fromlen);
 


@@ -607,6 +664,10 @@ int wxSocketImpl::RecvStream(void *buffer, int size)
 
 int wxSocketImpl::SendStream(const void *buffer, int size)
 {
 
 int wxSocketImpl::SendStream(const void *buffer, int size)
 {

+#ifdef wxNEEDS_IGNORE_SIGPIPE
+    IgnoreSignal ignore(SIGPIPE);
+#endif
+

     int ret;
     DO_WHILE_EINTR( ret, send(m_fd, static_cast<const char *>(buffer), size,
                               wxSOCKET_MSG_NOSIGNAL) );
     int ret;
     DO_WHILE_EINTR( ret, send(m_fd, static_cast<const char *>(buffer), size,
                               wxSOCKET_MSG_NOSIGNAL) );


@@ -689,36 +750,48 @@ int wxSocketImpl::Write(const void *buffer, int size)
 // Initialization and shutdown
 // --------------------------------------------------------------------------
 
 // Initialization and shutdown
 // --------------------------------------------------------------------------
 

-// FIXME-MT: all this is MT-unsafe, of course, we should protect all accesses
-//           to m_countInit with a crit section
-size_t wxSocketBase::m_countInit = 0;
+namespace
+{
+
+// counts the number of calls to Initialize() minus the number of calls to
+// Shutdown(): we don't really need it any more but it was documented that
+// Shutdown() must be called the same number of times as Initialize() and using
+// a counter helps us to check it
+int gs_socketInitCount = 0;
+
+} // anonymous namespace

 
 bool wxSocketBase::IsInitialized()
 {
 
 bool wxSocketBase::IsInitialized()
 {

-    return m_countInit > 0;
+    wxASSERT_MSG( wxIsMainThread(), "unsafe to call from other threads" );
+
+    return gs_socketInitCount != 0;

 }
 
 bool wxSocketBase::Initialize()
 {
 }
 
 bool wxSocketBase::Initialize()
 {

-    if ( !m_countInit++ )
+    wxCHECK_MSG( wxIsMainThread(), false,
+                 "must be called from the main thread" );
+
+    if ( !gs_socketInitCount )

     {
         wxSocketManager * const manager = wxSocketManager::Get();
         if ( !manager || !manager->OnInit() )
     {
         wxSocketManager * const manager = wxSocketManager::Get();
         if ( !manager || !manager->OnInit() )

-        {
-            m_countInit--;
-

             return false;
             return false;

-        }

     }
 
     }
 

+    gs_socketInitCount++;
+

     return true;
 }
 
 void wxSocketBase::Shutdown()
 {
     return true;
 }
 
 void wxSocketBase::Shutdown()
 {

-    // we should be initialized
-    wxASSERT_MSG( m_countInit > 0, _T("extra call to Shutdown()") );
-    if ( --m_countInit == 0 )
+    wxCHECK_RET( wxIsMainThread(), "must be called from the main thread" );
+
+    wxCHECK_RET( gs_socketInitCount > 0, "too many calls to Shutdown()" );
+
+    if ( !--gs_socketInitCount )

     {
         wxSocketManager * const manager = wxSocketManager::Get();
         wxCHECK_RET( manager, "should have a socket manager" );
     {
         wxSocketManager * const manager = wxSocketManager::Get();
         wxCHECK_RET( manager, "should have a socket manager" );


@@ -760,11 +833,16 @@ void wxSocketBase::Init()
     m_eventmask    =
     m_eventsgot    = 0;
 
     m_eventmask    =
     m_eventsgot    = 0;
 

-    if ( !IsInitialized() )
+    // when we create the first socket in the main thread we initialize the
+    // OS-dependent socket stuff: notice that this means that the user code
+    // needs to call wxSocket::Initialize() itself if the first socket it
+    // creates is not created in the main thread
+    if ( wxIsMainThread() )

     {
     {

-        // this Initialize() will be undone by wxSocketModule::OnExit(), all
-        // the other calls to it should be matched by a call to Shutdown()
-        Initialize();
+        if ( !Initialize() )
+        {
+            wxLogError(_("Cannot initialize sockets"));
+        }

     }
 }
 
     }
 }
 


@@ -784,12 +862,6 @@ wxSocketBase::wxSocketBase(wxSocketFlags flags, wxSocketType type)
 
 wxSocketBase::~wxSocketBase()
 {
 
 wxSocketBase::~wxSocketBase()
 {

-    // Just in case the app called Destroy() *and* then deleted the socket
-    // immediately: don't leave dangling pointers.
-    wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
-    if ( traits )
-        traits->RemoveFromPendingDelete(this);
-

     // Shutdown and close the socket
     if (!m_beingDeleted)
         Close();
     // Shutdown and close the socket
     if (!m_beingDeleted)
         Close();


@@ -798,8 +870,7 @@ wxSocketBase::~wxSocketBase()
     delete m_impl;
 
     // Free the pushback buffer
     delete m_impl;
 
     // Free the pushback buffer

-    if (m_unread)
-        free(m_unread);
+    free(m_unread);

 }
 
 bool wxSocketBase::Destroy()
 }
 
 bool wxSocketBase::Destroy()


@@ -815,14 +886,13 @@ bool wxSocketBase::Destroy()
     // Suppress events from now on
     Notify(false);
 
     // Suppress events from now on
     Notify(false);
 

-    // schedule this object for deletion
-    wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
-    if ( traits )
+    // Schedule this object for deletion instead of destroying it right now if
+    // possible as we may have other events pending for it
+    if ( wxTheApp )

     {
     {

-        // let the traits object decide what to do with us
-        traits->ScheduleForDestroy(this);
+        wxTheApp->ScheduleForDestruction(this);

     }
     }

-    else // no app or no traits
+    else // no app

     {
         // in wxBase we might have no app object at all, don't leak memory
         delete this;
     {
         // in wxBase we might have no app object at all, don't leak memory
         delete this;


@@ -901,14 +971,20 @@ wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes)
         // events and, even more importantly, we must do this under Windows
         // where we're not going to get notifications about socket being ready
         // for reading before we read all the existing data from it
         // events and, even more importantly, we must do this under Windows
         // where we're not going to get notifications about socket being ready
         // for reading before we read all the existing data from it

-        const int ret = m_connected ? m_impl->Read(buffer, nbytes) : 0;
+        const int ret = !m_impl->m_stream || m_connected
+                            ? m_impl->Read(buffer, nbytes)
+                            : 0;

         if ( ret == -1 )
         {
             if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK )
             {
                 // if we don't want to wait, just return immediately
                 if ( m_flags & wxSOCKET_NOWAIT )
         if ( ret == -1 )
         {
             if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK )
             {
                 // if we don't want to wait, just return immediately
                 if ( m_flags & wxSOCKET_NOWAIT )

+                {
+                    // this shouldn't be counted as an error in this case
+                    SetError(wxSOCKET_NOERROR);

                     break;
                     break;

+                }

 
                 // otherwise wait until the socket becomes ready for reading or
                 // an error occurs on it
 
                 // otherwise wait until the socket becomes ready for reading or
                 // an error occurs on it


@@ -1037,6 +1113,9 @@ wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes)
 {
     wxSocketReadGuard read(this);
 
 {
     wxSocketReadGuard read(this);
 

+    // Peek() should never block
+    wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT);
+

     m_lcount = DoRead(buffer, nbytes);
 
     Pushback(buffer, m_lcount);
     m_lcount = DoRead(buffer, nbytes);
 
     Pushback(buffer, m_lcount);


@@ -1066,7 +1145,7 @@ wxUint32 wxSocketBase::DoWrite(const void *buffer_, wxUint32 nbytes)
     wxUint32 total = 0;
     while ( nbytes )
     {
     wxUint32 total = 0;
     while ( nbytes )
     {

-        if ( !m_connected )
+        if ( m_impl->m_stream && !m_connected )

         {
             if ( (m_flags & wxSOCKET_WAITALL) || !total )
                 SetError(wxSOCKET_IOERR);
         {
             if ( (m_flags & wxSOCKET_WAITALL) || !total )
                 SetError(wxSOCKET_IOERR);


@@ -1297,8 +1376,11 @@ wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags)
 {
     wxCHECK_MSG( m_impl, -1, "can't wait on invalid socket" );
 
 {
     wxCHECK_MSG( m_impl, -1, "can't wait on invalid socket" );
 

-    // we're never going to become ready if we're not connected (any more)
-    if ( !m_connected && !m_establishing )
+    // we're never going to become ready in a TCP client if we're not connected
+    // any more (OTOH a server can call this to precisely wait for a connection
+    // so do wait for it in this case and UDP client is never "connected")
+    if ( !m_impl->IsServer() &&
+            m_impl->m_stream && !m_connected && !m_establishing )

         return -1;
 
     // This can be set to true from Interrupt() to exit this function a.s.a.p.
         return -1;
 
     // This can be set to true from Interrupt() to exit this function a.s.a.p.


@@ -1321,6 +1403,20 @@ wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags)
         eventLoop = NULL;
     }
 
         eventLoop = NULL;
     }
 

+    // Make sure the events we're interested in are enabled before waiting for
+    // them: this is really necessary here as otherwise this could happen:
+    //  1. DoRead(wxSOCKET_WAITALL) is called
+    //  2. There is nothing to read so DoWait(wxSOCKET_INPUT_FLAG) is called
+    //  3. Some, but not all data appears, wxSocketImplUnix::OnReadWaiting()
+    //     is called and wxSOCKET_INPUT_FLAG events are disabled in it
+    //  4. Because of wxSOCKET_WAITALL we call DoWait() again but the events
+    //     are still disabled and we block forever
+    //
+    // More elegant solution would be nice but for now simply re-enabling the
+    // events here will do
+    m_impl->ReenableEvents(flags & (wxSOCKET_INPUT_FLAG | wxSOCKET_OUTPUT_FLAG));
+
+

     // Wait until we receive the event we're waiting for or the timeout expires
     // (but note that we always execute the loop at least once, even if timeout
     // is 0 as this is used for polling)
     // Wait until we receive the event we're waiting for or the timeout expires
     // (but note that we always execute the loop at least once, even if timeout
     // is 0 as this is used for polling)


@@ -1542,20 +1638,29 @@ void wxSocketBase::OnRequest(wxSocketNotify notification)
 
         case wxSOCKET_CONNECTION:
             flag = wxSOCKET_CONNECTION_FLAG;
 
         case wxSOCKET_CONNECTION:
             flag = wxSOCKET_CONNECTION_FLAG;

+
+            // we're now successfully connected
+            m_connected = true;
+            m_establishing = false;
+
+            // error was previously set to wxSOCKET_WOULDBLOCK, but this is not
+            // the case any longer
+            SetError(wxSOCKET_NOERROR);

             break;
 
         case wxSOCKET_LOST:
             flag = wxSOCKET_LOST_FLAG;
             break;
 
         case wxSOCKET_LOST:
             flag = wxSOCKET_LOST_FLAG;

+
+            // if we lost the connection the socket is now closed and not
+            // connected any more
+            m_connected = false;
+            m_closed = true;

             break;
 
         default:
             wxFAIL_MSG( "unknown wxSocket notification" );
     }
 
             break;
 
         default:
             wxFAIL_MSG( "unknown wxSocket notification" );
     }
 

-    // if we lost the connection the socket is now closed
-    if ( notification == wxSOCKET_LOST )
-        m_closed = true;
-

     // remember the events which were generated for this socket, we're going to
     // use this in DoWait()
     m_eventsgot |= flag;
     // remember the events which were generated for this socket, we're going to
     // use this in DoWait()
     m_eventsgot |= flag;


@@ -1563,6 +1668,15 @@ void wxSocketBase::OnRequest(wxSocketNotify notification)
     // send the wx event if enabled and we're interested in it
     if ( m_notify && (m_eventmask & flag) && m_handler )
     {
     // send the wx event if enabled and we're interested in it
     if ( m_notify && (m_eventmask & flag) && m_handler )
     {

+        // don't generate the events when we're inside DoWait() called from our
+        // own code as we are going to consume the data that has just become
+        // available ourselves and the user code won't see it at all
+        if ( (notification == wxSOCKET_INPUT && m_reading) ||
+                (notification == wxSOCKET_OUTPUT && m_writing) )
+        {
+            return;
+        }
+

         wxSocketEvent event(m_id);
         event.m_event      = notification;
         event.m_clientData = m_clientData;
         wxSocketEvent event(m_id);
         event.m_event      = notification;
         event.m_clientData = m_clientData;


@@ -1654,13 +1768,14 @@ wxSocketServer::wxSocketServer(const wxSockAddress& addr,
                                wxSocketFlags flags)
               : wxSocketBase(flags, wxSOCKET_SERVER)
 {
                                wxSocketFlags flags)
               : wxSocketBase(flags, wxSOCKET_SERVER)
 {

-    wxLogTrace( wxTRACE_Socket, _T("Opening wxSocketServer") );
+    wxLogTrace( wxTRACE_Socket, wxT("Opening wxSocketServer") );

 
 

-    m_impl = wxSocketImpl::Create(*this);
+    wxSocketManager * const manager = wxSocketManager::Get();
+    m_impl = manager ? manager->CreateSocket(*this) : NULL;

 
     if (!m_impl)
     {
 
     if (!m_impl)
     {

-        wxLogTrace( wxTRACE_Socket, _T("*** Failed to create m_impl") );
+        wxLogTrace( wxTRACE_Socket, wxT("*** Failed to create m_impl") );

         return;
     }
 
         return;
     }
 


@@ -1679,14 +1794,13 @@ wxSocketServer::wxSocketServer(const wxSockAddress& addr,
 
     if (m_impl->CreateServer() != wxSOCKET_NOERROR)
     {
 
     if (m_impl->CreateServer() != wxSOCKET_NOERROR)
     {

-        delete m_impl;
-        m_impl = NULL;
+        wxDELETE(m_impl);

 
 

-        wxLogTrace( wxTRACE_Socket, _T("*** CreateServer() failed") );
+        wxLogTrace( wxTRACE_Socket, wxT("*** CreateServer() failed") );

         return;
     }
 
         return;
     }
 

-    wxLogTrace( wxTRACE_Socket, _T("wxSocketServer on fd %d"), m_impl->m_fd );
+    wxLogTrace( wxTRACE_Socket, wxT("wxSocketServer on fd %d"), m_impl->m_fd );

 }
 
 // --------------------------------------------------------------------------
 }
 
 // --------------------------------------------------------------------------


@@ -1752,7 +1866,7 @@ bool wxSocketServer::WaitForAccept(long seconds, long milliseconds)
 
 bool wxSocketBase::GetOption(int level, int optname, void *optval, int *optlen)
 {
 
 bool wxSocketBase::GetOption(int level, int optname, void *optval, int *optlen)
 {

-    wxASSERT_MSG( m_impl, _T("Socket not initialised") );
+    wxASSERT_MSG( m_impl, wxT("Socket not initialised") );

 
     SOCKOPTLEN_T lenreal = *optlen;
     if ( getsockopt(m_impl->m_fd, level, optname,
 
     SOCKOPTLEN_T lenreal = *optlen;
     if ( getsockopt(m_impl->m_fd, level, optname,


@@ -1767,7 +1881,7 @@ bool wxSocketBase::GetOption(int level, int optname, void *optval, int *optlen)
 bool
 wxSocketBase::SetOption(int level, int optname, const void *optval, int optlen)
 {
 bool
 wxSocketBase::SetOption(int level, int optname, const void *optval, int optlen)
 {

-    wxASSERT_MSG( m_impl, _T("Socket not initialised") );
+    wxASSERT_MSG( m_impl, wxT("Socket not initialised") );

 
     return setsockopt(m_impl->m_fd, level, optname,
                       static_cast<const char *>(optval), optlen) == 0;
 
     return setsockopt(m_impl->m_fd, level, optname,
                       static_cast<const char *>(optval), optlen) == 0;


@@ -1814,7 +1928,8 @@ bool wxSocketClient::DoConnect(const wxSockAddress& remote,
     m_establishing = false;
 
     // Create and set up the new one
     m_establishing = false;
 
     // Create and set up the new one

-    m_impl = wxSocketImpl::Create(*this);
+    wxSocketManager * const manager = wxSocketManager::Get();
+    m_impl = manager ? manager->CreateSocket(*this) : NULL;

     if ( !m_impl )
         return false;
 
     if ( !m_impl )
         return false;
 


@@ -1896,7 +2011,8 @@ wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr,
                 : wxSocketBase( flags, wxSOCKET_DATAGRAM )
 {
     // Create the socket
                 : wxSocketBase( flags, wxSOCKET_DATAGRAM )
 {
     // Create the socket

-    m_impl = wxSocketImpl::Create(*this);
+    wxSocketManager * const manager = wxSocketManager::Get();
+    m_impl = manager ? manager->CreateSocket(*this) : NULL;

 
     if (!m_impl)
         return;
 
     if (!m_impl)
         return;


@@ -1918,8 +2034,7 @@ wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr,
 
     if ( m_impl->CreateUDP() != wxSOCKET_NOERROR )
     {
 
     if ( m_impl->CreateUDP() != wxSOCKET_NOERROR )
     {

-        delete m_impl;
-        m_impl = NULL;
+        wxDELETE(m_impl);

         return;
     }
 
         return;
     }
 


@@ -1941,7 +2056,7 @@ wxDatagramSocket& wxDatagramSocket::SendTo( const wxSockAddress& addr,
                                             const void* buf,
                                             wxUint32 nBytes )
 {
                                             const void* buf,
                                             wxUint32 nBytes )
 {

-    wxASSERT_MSG( m_impl, _T("Socket not initialised") );
+    wxASSERT_MSG( m_impl, wxT("Socket not initialised") );

 
     m_impl->SetPeer(addr.GetAddress());
     Write(buf, nBytes);
 
     m_impl->SetPeer(addr.GetAddress());
     Write(buf, nBytes);


@@ -1974,4 +2089,21 @@ private:
 
 IMPLEMENT_DYNAMIC_CLASS(wxSocketModule, wxModule)
 
 
 IMPLEMENT_DYNAMIC_CLASS(wxSocketModule, wxModule)
 

+#if defined(wxUSE_SELECT_DISPATCHER) && wxUSE_SELECT_DISPATCHER
+// NOTE: we need to force linking against socketiohandler.cpp otherwise in
+//       static builds of wxWidgets the ManagerSetter::ManagerSetter ctor
+//       contained there wouldn't be ever called
+wxFORCE_LINK_MODULE( socketiohandler )
+#endif
+
+// same for ManagerSetter in the MSW file
+#ifdef __WXMSW__
+    wxFORCE_LINK_MODULE( mswsocket )
+#endif
+
+// and for OSXManagerSetter in the OS X one
+#ifdef __WXOSX__
+    wxFORCE_LINK_MODULE( osxsocket )
+#endif
+

 #endif // wxUSE_SOCKETS
 #endif // wxUSE_SOCKETS