deal with Cocoa as we do with Carbon, see #15008

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

diff --git a/src/common/socket.cpp b/src/common/socket.cpp
index f03558c0b76bebe87371b32cdd22d5ce97420533..545a68d54f77377ed08b141f2acd2e2c5638d091 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 +157,101 @@ 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
+// wait mode
+class wxSocketWaitModeChanger
+{
+public:
+    // temporarily set the flags to include the flag value which may be either
+    // wxSOCKET_NOWAIT or wxSOCKET_WAITALL
+    wxSocketWaitModeChanger(wxSocketBase *socket, int flag)
+        : m_socket(socket),
+          m_oldflags(socket->GetFlags())
+
+    {
+        // We can be passed only wxSOCKET_WAITALL{_READ,_WRITE} or
+        // wxSOCKET_NOWAIT{_READ,_WRITE} normally.
+        wxASSERT_MSG( !(flag & wxSOCKET_WAITALL) || !(flag & wxSOCKET_NOWAIT),
+                      "not a wait flag" );
+
+        // preserve wxSOCKET_BLOCK value when switching to wxSOCKET_WAITALL
+        // mode but not when switching to wxSOCKET_NOWAIT as the latter is
+        // incompatible with wxSOCKET_BLOCK
+        if ( flag != wxSOCKET_NOWAIT )
+            flag |= m_oldflags & wxSOCKET_BLOCK;
+
+        socket->SetFlags(flag);
+    }
+
+    ~wxSocketWaitModeChanger()
+    {
+        m_socket->SetFlags(m_oldflags);
+    }
+
+private:
+    wxSocketBase * const m_socket;
+    const int m_oldflags;
+
+    wxDECLARE_NO_COPY_CLASS(wxSocketWaitModeChanger);
+};
+
+// wxSocketRead/WriteGuard are instantiated before starting reading
+// from/writing to the socket
+class wxSocketReadGuard
+{
+public:
+    wxSocketReadGuard(wxSocketBase *socket)
+        : m_socket(socket)
+    {
+        wxASSERT_MSG( !m_socket->m_reading, "read reentrancy?" );
+
+        m_socket->m_reading = true;
+    }
+
+    ~wxSocketReadGuard()
+    {
+        m_socket->m_reading = false;
+
+        // 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;
+
+    wxDECLARE_NO_COPY_CLASS(wxSocketReadGuard);
+};
+
+class wxSocketWriteGuard
+{
+public:
+    wxSocketWriteGuard(wxSocketBase *socket)
+        : m_socket(socket)
+    {
+        wxASSERT_MSG( !m_socket->m_writing, "write reentrancy?" );
+
+        m_socket->m_writing = true;
+    }
+
+    ~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;
+
+    wxDECLARE_NO_COPY_CLASS(wxSocketWriteGuard);

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


@@ -242,6 +372,14 @@ 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 )
     {


@@ -388,12 +526,23 @@ wxSocketImpl *wxSocketImpl::Accept(wxSocketBase& wxsocket)
 {
     wxSockAddressStorage from;
     WX_SOCKLEN_T fromlen = sizeof(from);
 {
     wxSockAddressStorage from;
     WX_SOCKLEN_T fromlen = sizeof(from);

-    const SOCKET fd = accept(m_fd, &from.addr, &fromlen);
+    const wxSOCKET_T fd = accept(m_fd, &from.addr, &fromlen);
+
+    // accepting is similar to reading in the sense that it resets "ready for
+    // read" flag on the socket
+    ReenableEvents(wxSOCKET_INPUT_FLAG);

 
     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);
 


@@ -412,10 +561,6 @@ void wxSocketImpl::Close()
     }
 }
 
     }
 }
 

-/*
- *  Disallow further read/write operations on this socket, close
- *  the fd and disable all callbacks.
- */

 void wxSocketImpl::Shutdown()
 {
     if ( m_fd != INVALID_SOCKET )
 void wxSocketImpl::Shutdown()
 {
     if ( m_fd != INVALID_SOCKET )


@@ -521,6 +666,10 @@ 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) );


@@ -603,36 +752,48 @@ 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" );


@@ -647,7 +808,7 @@ void wxSocketBase::Shutdown()
 
 void wxSocketBase::Init()
 {
 
 void wxSocketBase::Init()
 {

-    m_impl       = NULL;
+    m_impl         = NULL;

     m_type         = wxSOCKET_UNINIT;
 
     // state
     m_type         = wxSOCKET_UNINIT;
 
     // state


@@ -658,6 +819,8 @@ void wxSocketBase::Init()
     m_writing      =
     m_closed       = false;
     m_lcount       = 0;
     m_writing      =
     m_closed       = false;
     m_lcount       = 0;

+    m_lcount_read  = 0;
+    m_lcount_write = 0;

     m_timeout      = 600;
     m_beingDeleted = false;
 
     m_timeout      = 600;
     m_beingDeleted = false;
 


@@ -674,11 +837,16 @@ 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"));
+        }

     }
 }
 
     }
 }
 


@@ -698,12 +866,6 @@ 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();


@@ -712,8 +874,7 @@ 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()


@@ -729,14 +890,17 @@ 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
+    // it can have other events pending for it and we have a way to do it.
+    //
+    // Notice that sockets used in other threads won't have any events for them
+    // and we shouldn't use delayed destruction mechanism for them as it's not
+    // MT-safe.
+    if ( wxIsMainThread() && 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;


@@ -785,21 +949,21 @@ void wxSocketBase::ShutdownOutput()
 
 wxSocketBase& wxSocketBase::Read(void* buffer, wxUint32 nbytes)
 {
 
 wxSocketBase& wxSocketBase::Read(void* buffer, wxUint32 nbytes)
 {

-    // Mask read events
-    m_reading = true;
-
-    m_lcount = DoRead(buffer, nbytes);
+    wxSocketReadGuard read(this);

 
 

-    // Allow read events from now on
-    m_reading = false;
+    m_lcount_read = DoRead(buffer, nbytes);
+    m_lcount = m_lcount_read;

 
     return *this;
 }
 
 wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes)
 {
 
     return *this;
 }
 
 wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes)
 {

+    wxCHECK_MSG( m_impl, 0, "socket must be valid" );
+

     // We use pointer arithmetic here which doesn't work with void pointers.
     char *buffer = static_cast<char *>(buffer_);
     // We use pointer arithmetic here which doesn't work with void pointers.
     char *buffer = static_cast<char *>(buffer_);

+    wxCHECK_MSG( buffer, 0, "NULL buffer" );

 
     // Try the push back buffer first, even before checking whether the socket
     // is valid to allow reading previously pushed back data from an already
 
     // Try the push back buffer first, even before checking whether the socket
     // is valid to allow reading previously pushed back data from an already


@@ -808,73 +972,72 @@ wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes)
     nbytes -= total;
     buffer += total;
 
     nbytes -= total;
     buffer += total;
 

-    // If it's indeed closed or if read everything, there is nothing more to do.
-    if ( !m_impl || !nbytes )
-        return total;
-
-    wxCHECK_MSG( buffer, 0, "NULL buffer" );
-
-
-    // wxSOCKET_NOWAIT overrides all the other flags and means that we are
-    // polling the socket and don't block at all.
-    if ( m_flags & wxSOCKET_NOWAIT )
+    while ( nbytes )

     {
     {

-        int ret = m_impl->Read(buffer, nbytes);
+        // our socket is non-blocking so Read() will return immediately if
+        // there is nothing to read yet and it's more efficient to try it first
+        // before entering DoWait() which is going to start dispatching GUI
+        // 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_impl->m_stream || m_connected
+                            ? m_impl->Read(buffer, nbytes)
+                            : 0;

         if ( ret == -1 )
         {
         if ( ret == -1 )
         {

-            if ( m_impl->GetLastError() != wxSOCKET_WOULDBLOCK )
-                SetError(wxSOCKET_IOERR);
-        }
-        else // not an error, even if we didn't read anything
-        {
-            total += ret;
-        }
-    }
-    else // blocking socket
-    {
-        for ( ;; )
-        {
-            // Wait until socket becomes ready for reading
-            if ( !WaitForRead() )
-                break;
-
-            const int ret = m_impl->Read(buffer, nbytes);
-            if ( ret == 0 )
+            if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK )

             {
             {

-                // for connection-oriented (e.g. TCP) sockets we can only read
-                // 0 bytes if the other end has been closed, and for
-                // connectionless ones (UDP) this flag doesn't make sense
-                // anyhow so we can set it to true too without doing any harm
-                m_closed = true;
-                break;
-            }
+                // if we don't want to wait, just return immediately
+                if ( m_flags & wxSOCKET_NOWAIT_READ )
+                {
+                    // this shouldn't be counted as an error in this case
+                    SetError(wxSOCKET_NOERROR);
+                    break;
+                }
+
+                // otherwise wait until the socket becomes ready for reading or
+                // an error occurs on it
+                if ( !DoWaitWithTimeout(wxSOCKET_INPUT_FLAG) )
+                {
+                    // and exit if the timeout elapsed before it did
+                    SetError(wxSOCKET_TIMEDOUT);
+                    break;
+                }

 
 

-            if ( ret == -1 )
+                // retry reading
+                continue;
+            }
+            else // "real" error

             {
                 SetError(wxSOCKET_IOERR);
                 break;
             }
             {
                 SetError(wxSOCKET_IOERR);
                 break;
             }

+        }
+        else if ( ret == 0 )
+        {
+            // for connection-oriented (e.g. TCP) sockets we can only read
+            // 0 bytes if the other end has been closed, and for connectionless
+            // ones (UDP) this flag doesn't make sense anyhow so we can set it
+            // to true too without doing any harm
+            m_closed = true;
+
+            // we're not going to read anything else and so if we haven't read
+            // anything (or not everything in wxSOCKET_WAITALL case) already,
+            // signal an error
+            if ( (m_flags & wxSOCKET_WAITALL_READ) || !total )
+                SetError(wxSOCKET_IOERR);
+            break;
+        }

 
 

-            total += ret;
-
-            // If wxSOCKET_WAITALL is not set, we can leave now as we did read
-            // something and we don't need to wait for all nbytes bytes to be
-            // read.
-            if ( !(m_flags & wxSOCKET_WAITALL) )
-                break;
-
-            // Otherwise continue reading until we do read everything.
-            nbytes -= ret;
-            if ( !nbytes )
-                break;
+        total += ret;

 
 

-            buffer += ret;
-        }
+        // if we are happy to read something and not the entire nbytes bytes,
+        // then we're done
+        if ( !(m_flags & wxSOCKET_WAITALL_READ) )
+            break;

 
 

-        // it's an error to not read everything in wxSOCKET_WAITALL mode or to
-        // not read anything otherwise
-        if ( ((m_flags & wxSOCKET_WAITALL) && nbytes) || !total )
-            SetError(wxSOCKET_IOERR);
+        nbytes -= ret;
+        buffer += ret;

     }
 
     return total;
     }
 
     return total;


@@ -888,11 +1051,9 @@ wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes)
         unsigned char len[4];
     } msg;
 
         unsigned char len[4];
     } msg;
 

-    // Mask read events
-    m_reading = true;
+    wxSocketReadGuard read(this);

 
 

-    int old_flags = m_flags;
-    SetFlags((m_flags & wxSOCKET_BLOCK) | wxSOCKET_WAITALL);
+    wxSocketWaitModeChanger changeFlags(this, wxSOCKET_WAITALL_READ);

 
     bool ok = false;
     if ( DoRead(&msg, sizeof(msg)) == sizeof(msg) )
 
     bool ok = false;
     if ( DoRead(&msg, sizeof(msg)) == sizeof(msg) )


@@ -919,7 +1080,8 @@ wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes)
                 len2 = 0;
 
             // Don't attempt to read if the msg was zero bytes long.
                 len2 = 0;
 
             // Don't attempt to read if the msg was zero bytes long.

-            m_lcount = len ? DoRead(buffer, len) : 0;
+            m_lcount_read = len ? DoRead(buffer, len) : 0;
+            m_lcount = m_lcount_read;

 
             if ( len2 )
             {
 
             if ( len2 )
             {


@@ -954,98 +1116,83 @@ wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes)
     if ( !ok )
         SetError(wxSOCKET_IOERR);
 
     if ( !ok )
         SetError(wxSOCKET_IOERR);
 

-    m_reading = false;
-    SetFlags(old_flags);
-

     return *this;
 }
 
 wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes)
 {
     return *this;
 }
 
 wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes)
 {

-    // Mask read events
-    m_reading = true;
+    wxSocketReadGuard read(this);
+
+    // Peek() should never block
+    wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT);

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

-    Pushback(buffer, m_lcount);

 
 

-    // Allow read events again
-    m_reading = false;
+    Pushback(buffer, m_lcount);

 
     return *this;
 }
 
 wxSocketBase& wxSocketBase::Write(const void *buffer, wxUint32 nbytes)
 {
 
     return *this;
 }
 
 wxSocketBase& wxSocketBase::Write(const void *buffer, wxUint32 nbytes)
 {

-    // Mask write events
-    m_writing = true;
-
-    m_lcount = DoWrite(buffer, nbytes);
+    wxSocketWriteGuard write(this);

 
 

-    // Allow write events again
-    m_writing = false;
+    m_lcount_write = DoWrite(buffer, nbytes);
+    m_lcount = m_lcount_write;

 
     return *this;
 }
 
 // This function is a mirror image of DoRead() except that it doesn't use the
 
     return *this;
 }
 
 // This function is a mirror image of DoRead() except that it doesn't use the

-// push back buffer, please see comments there
+// push back buffer and doesn't treat 0 return value specially (normally this
+// shouldn't happen at all here), so please see comments there for explanations

 wxUint32 wxSocketBase::DoWrite(const void *buffer_, wxUint32 nbytes)
 {
 wxUint32 wxSocketBase::DoWrite(const void *buffer_, wxUint32 nbytes)
 {

-    const char *buffer = static_cast<const char *>(buffer_);
-
-    // Return if there is nothing to read or the socket is (already?) closed.
-    if ( !m_impl || !nbytes )
-        return 0;
+    wxCHECK_MSG( m_impl, 0, "socket must be valid" );

 
 

+    const char *buffer = static_cast<const char *>(buffer_);

     wxCHECK_MSG( buffer, 0, "NULL buffer" );
 
     wxUint32 total = 0;
     wxCHECK_MSG( buffer, 0, "NULL buffer" );
 
     wxUint32 total = 0;

-    if ( m_flags & wxSOCKET_NOWAIT )
+    while ( nbytes )

     {
     {

-        const int ret = m_impl->Write(buffer, nbytes);
-        if ( ret == -1 )
+        if ( m_impl->m_stream && !m_connected )

         {
         {

-            if ( m_impl->GetLastError() != wxSOCKET_WOULDBLOCK )
+            if ( (m_flags & wxSOCKET_WAITALL_WRITE) || !total )

                 SetError(wxSOCKET_IOERR);
                 SetError(wxSOCKET_IOERR);

+            break;

         }
         }

-        else
-        {
-            total += ret;
-        }
-    }
-    else // blocking socket
-    {
-        for ( ;; )
-        {
-            if ( !WaitForWrite() )
-                break;

 
 

-            const int ret = m_impl->Write(buffer, nbytes);
-            if ( ret == 0 )
+        const int ret = m_impl->Write(buffer, nbytes);
+        if ( ret == -1 )
+        {
+            if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK )

             {
             {

-                m_closed = true;
-                break;
-            }
+                if ( m_flags & wxSOCKET_NOWAIT_WRITE )
+                    break;

 
 

-            if ( ret == -1 )
+                if ( !DoWaitWithTimeout(wxSOCKET_OUTPUT_FLAG) )
+                {
+                    SetError(wxSOCKET_TIMEDOUT);
+                    break;
+                }
+
+                continue;
+            }
+            else // "real" error

             {
                 SetError(wxSOCKET_IOERR);
                 break;
             }
             {
                 SetError(wxSOCKET_IOERR);
                 break;
             }

+        }

 
 

-            total += ret;
-            if ( !(m_flags & wxSOCKET_WAITALL) )
-                break;
-
-            nbytes -= ret;
-            if ( !nbytes )
-                break;
+        total += ret;

 
 

-            buffer += ret;
-        }
+        if ( !(m_flags & wxSOCKET_WAITALL_WRITE) )
+            break;

 
 

-        if ( ((m_flags & wxSOCKET_WAITALL) && nbytes) || !total )
-            SetError(wxSOCKET_IOERR);
+        nbytes -= ret;
+        buffer += ret;

     }
 
     return total;
     }
 
     return total;


@@ -1059,11 +1206,9 @@ wxSocketBase& wxSocketBase::WriteMsg(const void *buffer, wxUint32 nbytes)
         unsigned char len[4];
     } msg;
 
         unsigned char len[4];
     } msg;
 

-    // Mask write events
-    m_writing = true;
+    wxSocketWriteGuard write(this);

 
 

-    const int old_flags = m_flags;
-    SetFlags((m_flags & wxSOCKET_BLOCK) | wxSOCKET_WAITALL);
+    wxSocketWaitModeChanger changeFlags(this, wxSOCKET_WAITALL_WRITE);

 
     msg.sig[0] = (unsigned char) 0xad;
     msg.sig[1] = (unsigned char) 0xde;
 
     msg.sig[0] = (unsigned char) 0xad;
     msg.sig[1] = (unsigned char) 0xde;


@@ -1078,8 +1223,9 @@ wxSocketBase& wxSocketBase::WriteMsg(const void *buffer, wxUint32 nbytes)
     bool ok = false;
     if ( DoWrite(&msg, sizeof(msg)) == sizeof(msg) )
     {
     bool ok = false;
     if ( DoWrite(&msg, sizeof(msg)) == sizeof(msg) )
     {

-        m_lcount = DoWrite(buffer, nbytes);
-        if ( m_lcount == nbytes )
+        m_lcount_write = DoWrite(buffer, nbytes);
+        m_lcount = m_lcount_write;
+        if ( m_lcount_write == nbytes )

         {
             msg.sig[0] = (unsigned char) 0xed;
             msg.sig[1] = (unsigned char) 0xfe;
         {
             msg.sig[0] = (unsigned char) 0xed;
             msg.sig[1] = (unsigned char) 0xfe;


@@ -1098,9 +1244,6 @@ wxSocketBase& wxSocketBase::WriteMsg(const void *buffer, wxUint32 nbytes)
     if ( !ok )
         SetError(wxSOCKET_IOERR);
 
     if ( !ok )
         SetError(wxSOCKET_IOERR);
 

-    m_writing = false;
-    SetFlags(old_flags);
-

     return *this;
 }
 
     return *this;
 }
 


@@ -1121,11 +1264,9 @@ wxSocketBase& wxSocketBase::Discard()
     wxUint32 ret;
     wxUint32 total = 0;
 
     wxUint32 ret;
     wxUint32 total = 0;
 

-    // Mask read events
-    m_reading = true;
+    wxSocketReadGuard read(this);

 
 

-    const int old_flags = m_flags;
-    SetFlags(wxSOCKET_NOWAIT);
+    wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT);

 
     do
     {
 
     do
     {


@@ -1138,11 +1279,6 @@ wxSocketBase& wxSocketBase::Discard()
     m_lcount = total;
     SetError(wxSOCKET_NOERROR);
 
     m_lcount = total;
     SetError(wxSOCKET_NOERROR);
 

-    // Allow read events again
-    m_reading = false;
-
-    SetFlags(old_flags);
-

     return *this;
 }
 
     return *this;
 }
 


@@ -1173,17 +1309,31 @@ wxSocketEventFlags wxSocketImpl::Select(wxSocketEventFlags flags,
         exceptfds;                      // always want to know about errors
 
     if ( flags & wxSOCKET_INPUT_FLAG )
         exceptfds;                      // always want to know about errors
 
     if ( flags & wxSOCKET_INPUT_FLAG )

-    {

         preadfds = &readfds;
         preadfds = &readfds;

+
+    if ( flags & wxSOCKET_OUTPUT_FLAG )
+        pwritefds = &writefds;
+
+    // When using non-blocking connect() the client socket becomes connected
+    // (successfully or not) when it becomes writable but when using
+    // non-blocking accept() the server socket becomes connected when it
+    // becomes readable.
+    if ( flags & wxSOCKET_CONNECTION_FLAG )
+    {
+        if ( m_server )
+            preadfds = &readfds;
+        else
+            pwritefds = &writefds;
+    }
+
+    if ( preadfds )
+    {

         wxFD_ZERO(preadfds);
         wxFD_SET(m_fd, preadfds);
     }
 
         wxFD_ZERO(preadfds);
         wxFD_SET(m_fd, preadfds);
     }
 

-    // when using non-blocking connect() the socket becomes connected
-    // (successfully or not) when it becomes writable
-    if ( flags & (wxSOCKET_OUTPUT_FLAG | wxSOCKET_CONNECTION_FLAG) )
+    if ( pwritefds )

     {
     {

-        pwritefds = &writefds;

         wxFD_ZERO(pwritefds);
         wxFD_SET(m_fd, pwritefds);
     }
         wxFD_ZERO(pwritefds);
         wxFD_SET(m_fd, pwritefds);
     }


@@ -1234,21 +1384,35 @@ wxSocketEventFlags wxSocketImpl::Select(wxSocketEventFlags flags,
     return detected & flags;
 }
 
     return detected & flags;
 }
 

-bool
+int

 wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags)
 {
 wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags)
 {

-    wxCHECK_MSG( m_impl, false, "can't wait on invalid socket" );
-
-    // This can be set to true from Interrupt() to exit this function a.s.a.p.
-    m_interrupt = false;
-
-

     // Use either the provided timeout or the default timeout value associated
     // with this socket.
     //
     // TODO: allow waiting forever, see #9443
     const long timeout = seconds == -1 ? m_timeout * 1000
                                        : seconds * 1000 + milliseconds;
     // Use either the provided timeout or the default timeout value associated
     // with this socket.
     //
     // TODO: allow waiting forever, see #9443
     const long timeout = seconds == -1 ? m_timeout * 1000
                                        : seconds * 1000 + milliseconds;

+
+    return DoWait(timeout, flags);
+}
+
+int
+wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags)
+{
+    wxCHECK_MSG( m_impl, -1, "can't wait on invalid socket" );
+
+    // 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.
+    m_interrupt = false;
+
+

     const wxMilliClock_t timeEnd = wxGetLocalTimeMillis() + timeout;
 
     // Get the active event loop which we'll use for the message dispatching
     const wxMilliClock_t timeEnd = wxGetLocalTimeMillis() + timeout;
 
     // Get the active event loop which we'll use for the message dispatching


@@ -1265,11 +1429,25 @@ wxSocketBase::DoWait(long seconds, long milliseconds, 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)

-    bool gotEvent = false;
-    for ( bool firstTime = true; !m_interrupt ; firstTime = false )
+    int rc = 0;
+    for ( bool firstTime = true; !m_interrupt; firstTime = false )

     {
         long timeLeft = wxMilliClockToLong(timeEnd - wxGetLocalTimeMillis());
         if ( timeLeft < 0 )
     {
         long timeLeft = wxMilliClockToLong(timeEnd - wxGetLocalTimeMillis());
         if ( timeLeft < 0 )


@@ -1280,9 +1458,6 @@ wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags)
             timeLeft = 0;
         }
 
             timeLeft = 0;
         }
 

-        // This function is only called if wxSOCKET_BLOCK flag was not used and
-        // so we should dispatch the events if there is an event loop capable
-        // of doing it.

         wxSocketEventFlags events;
         if ( eventLoop )
         {
         wxSocketEventFlags events;
         if ( eventLoop )
         {


@@ -1308,8 +1483,7 @@ wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags)
         {
             m_connected = false;
             m_establishing = false;
         {
             m_connected = false;
             m_establishing = false;

-            if ( flags & wxSOCKET_LOST_FLAG )
-                gotEvent = true;
+            rc = -1;

             break;
         }
 
             break;
         }
 


@@ -1321,29 +1495,27 @@ wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags)
         {
             m_connected = true;
             m_establishing = false;
         {
             m_connected = true;
             m_establishing = false;

-            gotEvent = true;
+            rc = true;

             break;
         }
 
         // Data available or output buffer ready?
         if ( (events & wxSOCKET_INPUT_FLAG) || (events & wxSOCKET_OUTPUT_FLAG) )
         {
             break;
         }
 
         // Data available or output buffer ready?
         if ( (events & wxSOCKET_INPUT_FLAG) || (events & wxSOCKET_OUTPUT_FLAG) )
         {

-            gotEvent = true;
+            rc = true;

             break;
         }
     }
 
             break;
         }
     }
 

-    return gotEvent;
+    return rc;

 }
 
 bool wxSocketBase::Wait(long seconds, long milliseconds)
 {
     return DoWait(seconds, milliseconds,
 }
 
 bool wxSocketBase::Wait(long seconds, long milliseconds)
 {
     return DoWait(seconds, milliseconds,

-            wxSOCKET_INPUT_FLAG |
-            wxSOCKET_OUTPUT_FLAG |
-            wxSOCKET_CONNECTION_FLAG |
-            wxSOCKET_LOST_FLAG
-        );
+                  wxSOCKET_INPUT_FLAG |
+                  wxSOCKET_OUTPUT_FLAG |
+                  wxSOCKET_CONNECTION_FLAG) != 0;

 }
 
 bool wxSocketBase::WaitForRead(long seconds, long milliseconds)
 }
 
 bool wxSocketBase::WaitForRead(long seconds, long milliseconds)


@@ -1352,22 +1524,28 @@ bool wxSocketBase::WaitForRead(long seconds, long milliseconds)
     if ( m_unread )
         return true;
 
     if ( m_unread )
         return true;
 

-    // Note that wxSOCKET_INPUT_LOST has to be explicitly passed to DoWait
-    // because of the semantics of WaitForRead: a return value of true means
-    // that a Read call will return immediately, not that there is
-    // actually data to read.
-    return DoWait(seconds, milliseconds, wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG);
+    // Check if the socket is not already ready for input, if it is, there is
+    // no need to start waiting for it (worse, we'll actually never get a
+    // notification about the socket becoming ready if it is already under
+    // Windows)
+    if ( m_impl->Select(wxSOCKET_INPUT_FLAG) )
+        return true;
+
+    return DoWait(seconds, milliseconds, wxSOCKET_INPUT_FLAG) != 0;

 }
 
 
 bool wxSocketBase::WaitForWrite(long seconds, long milliseconds)
 {
 }
 
 
 bool wxSocketBase::WaitForWrite(long seconds, long milliseconds)
 {

-    return DoWait(seconds, milliseconds, wxSOCKET_OUTPUT_FLAG | wxSOCKET_LOST_FLAG);
+    if ( m_impl->Select(wxSOCKET_OUTPUT_FLAG) )
+        return true;
+
+    return DoWait(seconds, milliseconds, wxSOCKET_OUTPUT_FLAG) != 0;

 }
 
 bool wxSocketBase::WaitForLost(long seconds, long milliseconds)
 {
 }
 
 bool wxSocketBase::WaitForLost(long seconds, long milliseconds)
 {

-    return DoWait(seconds, milliseconds, wxSOCKET_LOST_FLAG);
+    return DoWait(seconds, milliseconds, wxSOCKET_LOST_FLAG) == -1;

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


@@ -1486,20 +1664,29 @@ 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;


@@ -1507,17 +1694,13 @@ 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 )
     {

-        // If we are in the middle of a R/W operation, do not propagate events
-        // to users. Also, filter 'late' events which are no longer valid.
-        if ( notification == wxSOCKET_INPUT )
-        {
-            if ( m_reading || !m_impl->Select(wxSOCKET_INPUT_FLAG) )
-                return;
-        }
-        else if ( notification == wxSOCKET_OUTPUT )
+        // 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) )

         {
         {

-            if ( m_writing || !m_impl->Select(wxSOCKET_OUTPUT_FLAG) )
-                return;
+            return;

         }
 
         wxSocketEvent event(m_id);
         }
 
         wxSocketEvent event(m_id);


@@ -1611,13 +1794,14 @@ 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;
     }
 


@@ -1636,14 +1820,17 @@ 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 );
+    // Notice that we need a cast as wxSOCKET_T is 64 bit under Win64 and that
+    // the cast is safe because a wxSOCKET_T is a handle and so limited to 32
+    // (or, actually, even 24) bit values anyhow.
+    wxLogTrace( wxTRACE_Socket, wxT("wxSocketServer on fd %u"),
+                static_cast<unsigned>(m_impl->m_fd) );

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


@@ -1704,12 +1891,20 @@ wxSocketBase *wxSocketServer::Accept(bool wait)
 
 bool wxSocketServer::WaitForAccept(long seconds, long milliseconds)
 {
 
 bool wxSocketServer::WaitForAccept(long seconds, long milliseconds)
 {

-    return DoWait(seconds, milliseconds, wxSOCKET_CONNECTION_FLAG);
+    return DoWait(seconds, milliseconds, wxSOCKET_CONNECTION_FLAG) == 1;

 }
 
 }
 

+wxSOCKET_T wxSocketBase::GetSocket() const
+{
+    wxASSERT_MSG( m_impl, wxS("Socket not initialised") );
+
+    return m_impl->m_fd;
+}
+
+

 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,


@@ -1724,7 +1919,7 @@ 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;


@@ -1752,10 +1947,6 @@ wxSocketClient::wxSocketClient(wxSocketFlags flags)
     m_initialSendBufferSize = -1;
 }
 
     m_initialSendBufferSize = -1;
 }
 

-wxSocketClient::~wxSocketClient()
-{
-}
-

 // --------------------------------------------------------------------------
 // Connect
 // --------------------------------------------------------------------------
 // --------------------------------------------------------------------------
 // Connect
 // --------------------------------------------------------------------------


@@ -1775,7 +1966,8 @@ 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;
 


@@ -1842,12 +2034,10 @@ bool wxSocketClient::WaitOnConnect(long seconds, long milliseconds)
     wxCHECK_MSG( m_establishing && m_impl, false,
                  "No connection establishment attempt in progress" );
 
     wxCHECK_MSG( m_establishing && m_impl, false,
                  "No connection establishment attempt in progress" );
 

-    // we must specify wxSOCKET_LOST_FLAG here explicitly because we must return
-    // true if the connection establishment process is finished, whether it is
-    // over because we successfully connected or because we were not able to
-    // connect
-    return DoWait(seconds, milliseconds,
-        wxSOCKET_CONNECTION_FLAG | wxSOCKET_LOST_FLAG);
+    // notice that we return true even if DoWait() returned -1, i.e. if an
+    // error occurred and connection was lost: this is intentional as we should
+    // return false only if timeout expired without anything happening
+    return DoWait(seconds, milliseconds, wxSOCKET_CONNECTION_FLAG) != 0;

 }
 
 // ==========================================================================
 }
 
 // ==========================================================================


@@ -1859,7 +2049,8 @@ 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;


@@ -1881,8 +2072,7 @@ 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;
     }
 


@@ -1904,7 +2094,7 @@ 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);


@@ -1937,4 +2127,21 @@ 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 __WINDOWS__
+    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