X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/609aa390f4b788ba94622e78464837a1838c5463..ab7049776d45e622f621dd06216a4c1a1ad34b15:/src/common/socket.cpp diff --git a/src/common/socket.cpp b/src/common/socket.cpp index 71cfcc6cce..36a9dc1090 100644 --- 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: $Id$ -// License: wxWindows licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ========================================================================== @@ -115,7 +115,7 @@ wxDEFINE_EVENT(wxEVT_SOCKET, wxSocketEvent); // discard buffer #define MAX_DISCARD_SIZE (10 * 1024) -#define wxTRACE_Socket _T("wxSocket") +#define wxTRACE_Socket wxT("wxSocket") // -------------------------------------------------------------------------- // wxWin macros @@ -213,7 +213,11 @@ public: { 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: @@ -231,13 +235,15 @@ public: 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; + + wxSocketImpl * const impl = m_socket->m_impl; + if ( impl && impl->m_fd != INVALID_SOCKET ) + impl->ReenableEvents(wxSOCKET_OUTPUT_FLAG); } private: @@ -527,7 +533,14 @@ wxSocketImpl *wxSocketImpl::Accept(wxSocketBase& wxsocket) 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); @@ -737,36 +750,48 @@ int wxSocketImpl::Write(const void *buffer, int size) // 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() { - return m_countInit > 0; + wxASSERT_MSG( wxIsMainThread(), "unsafe to call from other threads" ); + + return gs_socketInitCount != 0; } 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() ) - { - m_countInit--; - return false; - } } + gs_socketInitCount++; + 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" ); @@ -808,12 +833,16 @@ void wxSocketBase::Init() 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() - if (!Initialize()) - wxLogError("Cannot initialize wxSocketBase"); + if ( !Initialize() ) + { + wxLogError(_("Cannot initialize sockets")); + } } } @@ -833,12 +862,6 @@ wxSocketBase::wxSocketBase(wxSocketFlags flags, wxSocketType type) 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(); @@ -847,8 +870,7 @@ wxSocketBase::~wxSocketBase() delete m_impl; // Free the pushback buffer - if (m_unread) - free(m_unread); + free(m_unread); } bool wxSocketBase::Destroy() @@ -864,14 +886,13 @@ bool wxSocketBase::Destroy() // 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; @@ -959,7 +980,11 @@ wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes) { // 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; + } // otherwise wait until the socket becomes ready for reading or // an error occurs on it @@ -1088,6 +1113,9 @@ wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes) { wxSocketReadGuard read(this); + // Peek() should never block + wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT); + m_lcount = DoRead(buffer, nbytes); Pushback(buffer, m_lcount); @@ -1269,17 +1297,31 @@ wxSocketEventFlags wxSocketImpl::Select(wxSocketEventFlags flags, exceptfds; // always want to know about errors if ( flags & wxSOCKET_INPUT_FLAG ) - { 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); } - // 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); } @@ -1348,8 +1390,11 @@ wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags) { 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. @@ -1620,7 +1665,9 @@ void wxSocketBase::OnRequest(wxSocketNotify notification) case wxSOCKET_LOST: flag = wxSOCKET_LOST_FLAG; - // if we lost the connection the socket is now closed + // if we lost the connection the socket is now closed and not + // connected any more + m_connected = false; m_closed = true; break; @@ -1735,13 +1782,14 @@ wxSocketServer::wxSocketServer(const wxSockAddress& addr, 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) { - wxLogTrace( wxTRACE_Socket, _T("*** Failed to create m_impl") ); + wxLogTrace( wxTRACE_Socket, wxT("*** Failed to create m_impl") ); return; } @@ -1760,14 +1808,13 @@ wxSocketServer::wxSocketServer(const wxSockAddress& addr, 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; } - wxLogTrace( wxTRACE_Socket, _T("wxSocketServer on fd %d"), m_impl->m_fd ); + wxLogTrace( wxTRACE_Socket, wxT("wxSocketServer on fd %d"), m_impl->m_fd ); } // -------------------------------------------------------------------------- @@ -1833,7 +1880,7 @@ bool wxSocketServer::WaitForAccept(long seconds, long milliseconds) 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, @@ -1848,7 +1895,7 @@ bool wxSocketBase::GetOption(int level, int optname, 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(optval), optlen) == 0; @@ -1895,7 +1942,8 @@ bool wxSocketClient::DoConnect(const wxSockAddress& remote, 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; @@ -1977,7 +2025,8 @@ wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr, : 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; @@ -1999,8 +2048,7 @@ wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr, if ( m_impl->CreateUDP() != wxSOCKET_NOERROR ) { - delete m_impl; - m_impl = NULL; + wxDELETE(m_impl); return; } @@ -2022,7 +2070,7 @@ wxDatagramSocket& wxDatagramSocket::SendTo( const wxSockAddress& addr, 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); @@ -2062,4 +2110,14 @@ IMPLEMENT_DYNAMIC_CLASS(wxSocketModule, wxModule) 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