inserting generic mdi for OpenVMS Motif support

[wxWidgets.git] / src / unix / epolldispatcher.cpp

diff --git a/src/unix/epolldispatcher.cpp b/src/unix/epolldispatcher.cpp
index 294f89f1cbc428552a4c1d192008f3656f1aa15b..f509c7be2556af9f903fd0c6449720d7977f85db 100644 (file)
--- a/src/unix/epolldispatcher.cpp
+++ b/src/unix/epolldispatcher.cpp
@@ -19,11 +19,10 @@
 // for compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // for compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 

-#ifdef HAVE_SYS_EPOLL_H
+#if wxUSE_EPOLL_DISPATCHER

 
 #include "wx/unix/private/epolldispatcher.h"
 #include "wx/unix/private.h"
 
 #include "wx/unix/private/epolldispatcher.h"
 #include "wx/unix/private.h"

-#include "wx/module.h"

 
 #ifndef WX_PRECOMP
     #include "wx/log.h"
 
 #ifndef WX_PRECOMP
     #include "wx/log.h"


@@ -32,18 +31,17 @@
 
 #include <sys/epoll.h>
 #include <errno.h>
 
 #include <sys/epoll.h>
 #include <errno.h>

+#include <unistd.h>

 
 #define wxEpollDispatcher_Trace wxT("epolldispatcher")
 
 
 #define wxEpollDispatcher_Trace wxT("epolldispatcher")
 

-static wxEpollDispatcher *gs_epollDispatcher = NULL;
-

 // ============================================================================
 // implementation
 // ============================================================================
 
 // helper: return EPOLLxxx mask corresponding to the given flags (and also log
 // debugging messages about it)
 // ============================================================================
 // implementation
 // ============================================================================
 
 // helper: return EPOLLxxx mask corresponding to the given flags (and also log
 // debugging messages about it)

-static uint32_t GetEpollMask(int flags, int fd)
+static uint32_t GetEpollMask(int flags, int WXUNUSED_UNLESS_DEBUG(fd))

 {
     uint32_t ep = 0;
 
 {
     uint32_t ep = 0;
 


@@ -75,20 +73,37 @@ static uint32_t GetEpollMask(int flags, int fd)
 // wxEpollDispatcher
 // ----------------------------------------------------------------------------
 
 // wxEpollDispatcher
 // ----------------------------------------------------------------------------
 

-wxEpollDispatcher::wxEpollDispatcher()
+/* static */
+wxEpollDispatcher *wxEpollDispatcher::Create()

 {
 {

-    m_epollDescriptor = epoll_create(1024);
-    if ( m_epollDescriptor == -1 )
+    int epollDescriptor = epoll_create(1024);
+    if ( epollDescriptor == -1 )

     {
         wxLogSysError(_("Failed to create epoll descriptor"));
     {
         wxLogSysError(_("Failed to create epoll descriptor"));

+        return NULL;

     }
     }

+    wxLogTrace(wxEpollDispatcher_Trace,
+                   _T("Epoll fd %d created"), epollDescriptor);
+    return new wxEpollDispatcher(epollDescriptor);

 }
 
 }
 

-bool wxEpollDispatcher::RegisterFD(int fd, wxFDIOHandler* handler, int flags)
+wxEpollDispatcher::wxEpollDispatcher(int epollDescriptor)

 {
 {

-    if ( !wxFDIODispatcher::RegisterFD(fd, handler, flags) )
-        return false;
+    wxASSERT_MSG( epollDescriptor != -1, _T("invalid descriptor") );

 
 

+    m_epollDescriptor = epollDescriptor;
+}
+
+wxEpollDispatcher::~wxEpollDispatcher()
+{
+    if ( close(m_epollDescriptor) != 0 )
+    {
+        wxLogSysError(_("Error closing epoll descriptor"));
+    }
+}
+
+bool wxEpollDispatcher::RegisterFD(int fd, wxFDIOHandler* handler, int flags)
+{

     epoll_event ev;
     ev.events = GetEpollMask(flags, fd);
     ev.data.ptr = handler;
     epoll_event ev;
     ev.events = GetEpollMask(flags, fd);
     ev.data.ptr = handler;


@@ -101,15 +116,14 @@ bool wxEpollDispatcher::RegisterFD(int fd, wxFDIOHandler* handler, int flags)
 
         return false;
     }
 
         return false;
     }

+    wxLogTrace(wxEpollDispatcher_Trace,
+               _T("Added fd %d (handler %p) to epoll %d"), fd, handler, m_epollDescriptor);

 
     return true;
 }
 
 bool wxEpollDispatcher::ModifyFD(int fd, wxFDIOHandler* handler, int flags)
 {
 
     return true;
 }
 
 bool wxEpollDispatcher::ModifyFD(int fd, wxFDIOHandler* handler, int flags)
 {

-    if ( !wxFDIODispatcher::ModifyFD(fd, handler, flags) )
-        return false;
-

     epoll_event ev;
     ev.events = GetEpollMask(flags, fd);
     ev.data.ptr = handler;
     epoll_event ev;
     ev.events = GetEpollMask(flags, fd);
     ev.data.ptr = handler;


@@ -123,15 +137,13 @@ bool wxEpollDispatcher::ModifyFD(int fd, wxFDIOHandler* handler, int flags)
         return false;
     }
 
         return false;
     }
 

+    wxLogTrace(wxEpollDispatcher_Trace,
+                _T("Modified fd %d (handler: %p) on epoll %d"), fd, handler, m_epollDescriptor);

     return true;
 }
 
     return true;
 }
 

-wxFDIOHandler *wxEpollDispatcher::UnregisterFD(int fd, int flags)
+bool wxEpollDispatcher::UnregisterFD(int fd)

 {
 {

-    wxFDIOHandler * const handler = wxFDIODispatcher::UnregisterFD(fd, flags);
-    if ( !handler )
-        return NULL;
-

     epoll_event ev;
     ev.events = 0;
     ev.data.ptr = NULL;
     epoll_event ev;
     ev.events = 0;
     ev.data.ptr = NULL;


@@ -141,11 +153,12 @@ wxFDIOHandler *wxEpollDispatcher::UnregisterFD(int fd, int flags)
         wxLogSysError(_("Failed to unregister descriptor %d from epoll descriptor %d"),
                       fd, m_epollDescriptor);
     }
         wxLogSysError(_("Failed to unregister descriptor %d from epoll descriptor %d"),
                       fd, m_epollDescriptor);
     }

-
-    return handler;
+    wxLogTrace(wxEpollDispatcher_Trace,
+                _T("removed fd %d from %d"), fd, m_epollDescriptor);
+    return true;

 }
 
 }
 

-void wxEpollDispatcher::RunLoop(int timeout)
+bool wxEpollDispatcher::Dispatch(int timeout)

 {
     epoll_event events[16];
 
 {
     epoll_event events[16];
 


@@ -163,10 +176,11 @@ void wxEpollDispatcher::RunLoop(int timeout)
         {
             wxLogSysError(_("Waiting for IO on epoll descriptor %d failed"),
                           m_epollDescriptor);
         {
             wxLogSysError(_("Waiting for IO on epoll descriptor %d failed"),
                           m_epollDescriptor);

-            return;
+            return false;

         }
     }
 
         }
     }
 

+    bool gotEvents = false;

     for ( epoll_event *p = events; p < events + e_num; p++ )
     {
         wxFDIOHandler * const handler = (wxFDIOHandler *)(p->data.ptr);
     for ( epoll_event *p = events; p < events + e_num; p++ )
     {
         wxFDIOHandler * const handler = (wxFDIOHandler *)(p->data.ptr);


@@ -176,48 +190,23 @@ void wxEpollDispatcher::RunLoop(int timeout)
             continue;
         }
 
             continue;
         }
 

-        if ( p->events & EPOLLIN )
+        // note that for compatibility with wxSelectDispatcher we call
+        // OnReadWaiting() on EPOLLHUP as this is what epoll_wait() returns
+        // when the write end of a pipe is closed while with select() the
+        // remaining pipe end becomes ready for reading when this happens
+        if ( p->events & (EPOLLIN | EPOLLHUP) )

             handler->OnReadWaiting();
             handler->OnReadWaiting();

-
-        if ( p->events & EPOLLOUT )
+        else if ( p->events & EPOLLOUT )

             handler->OnWriteWaiting();
             handler->OnWriteWaiting();

-
-        if ( p->events & (EPOLLERR | EPOLLHUP) )
+        else if ( p->events & EPOLLERR )

             handler->OnExceptionWaiting();
             handler->OnExceptionWaiting();

-    }
-}
+        else
+            continue;

 
 

-/* static */
-wxEpollDispatcher *wxEpollDispatcher::Get()
-{
-    if ( !gs_epollDispatcher )
-    {
-        gs_epollDispatcher = new wxEpollDispatcher;
-        if ( !gs_epollDispatcher->IsOk() )
-        {
-            delete gs_epollDispatcher;
-            gs_epollDispatcher = NULL;
-        }
+        gotEvents = true;

     }
 
     }
 

-    return gs_epollDispatcher;
+    return gotEvents;

 }
 
 }
 

-// ----------------------------------------------------------------------------
-// wxEpollDispatcherModule
-// ----------------------------------------------------------------------------
-
-class wxEpollDispatcherModule : public wxModule
-{
-public:
-    wxEpollDispatcherModule() { }
-
-    virtual bool OnInit() { return true; }
-    virtual void OnExit() { wxDELETE(gs_epollDispatcher); }
-
-    DECLARE_DYNAMIC_CLASS(wxEpollDispatcherModule)
-};
-
-IMPLEMENT_DYNAMIC_CLASS(wxEpollDispatcherModule, wxModule)
-
-#endif // HAVE_SYS_EPOLL_H
+#endif // wxUSE_EPOLL_DISPATCHER