no real change: put event handlers together at the end of the file

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

diff --git a/src/common/socket.cpp b/src/common/socket.cpp
index 88937119b1e04d4caa719a3785cc13f7f1e9b999..abe4f838102f6a614217316647d15a38845adc3c 100644 (file)
--- a/src/common/socket.cpp
+++ b/src/common/socket.cpp
@@ -42,6 +42,7 @@
 #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"
@@ -57,10 +58,12 @@
 // 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)
-    #if defined(__UNIX__) && !defined(SO_NOSIGPIPE)
+    #if defined(__UNIX__) && !defined(SO_NOSIGPIPE) && !defined( __VMS )
         #error "Writing to socket could generate unhandled SIGPIPE."
         #error "Please post information about your system to wx-dev."
     #endif
@@ -76,6 +79,9 @@ WX_CHECK_BUILD_OPTIONS("wxNet")
 // macros and constants
 // --------------------------------------------------------------------------
 
+// event
+wxDEFINE_EVENT(wxEVT_SOCKET, wxSocketEvent);
+
 // discard buffer
 #define MAX_DISCARD_SIZE (10 * 1024)
 
@@ -764,7 +770,8 @@ void wxSocketBase::Init()
     {
         // 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 wxSocketBase");
     }
 }
 
@@ -1321,6 +1328,20 @@ wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags)
         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)
@@ -1563,6 +1584,15 @@ 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 )
     {
+        // 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;
@@ -1974,4 +2004,11 @@ private:
 
 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
+
 #endif // wxUSE_SOCKETS