src/osx/core/evtloop_cf.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/core/evtloop_cf.cpp
   3 // Purpose:     wxEventLoop implementation common to both Carbon and Cocoa
   4 // Author:      Vadim Zeitlin
   5 // Created:     2009-10-18
   6 // RCS-ID:      $Id: wxhead.cpp,v 1.10 2009-06-29 10:23:04 zeitlin Exp $
   7 // Copyright:   (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // for compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #include "wx/evtloop.h"
  27
  28 #if wxUSE_EVENTLOOP_SOURCE
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/log.h"
  32 #endif
  33
  34 #include "wx/evtloopsrc.h"
  35
  36 #include "wx/scopedptr.h"
  37
  38 #include "wx/osx/private.h"
  39 #include "wx/osx/core/cfref.h"
  40
  41 // ============================================================================
  42 // wxCFEventLoopSource and wxCFEventLoop implementation
  43 // ============================================================================
  44
  45 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
  46 namespace
  47 {
  48
  49 void EnableDescriptorCallBacks(CFFileDescriptorRef cffd, int flags)
  50 {
  51     if ( flags & wxEVENT_SOURCE_INPUT )
  52         CFFileDescriptorEnableCallBacks(cffd, kCFFileDescriptorReadCallBack);
  53     if ( flags & wxEVENT_SOURCE_OUTPUT )
  54         CFFileDescriptorEnableCallBacks(cffd, kCFFileDescriptorWriteCallBack);
  55 }
  56
  57 void
  58 wx_cffiledescriptor_callback(CFFileDescriptorRef cffd,
  59                              CFOptionFlags flags,
  60                              void *ctxData)
  61 {
  62     wxLogTrace(wxTRACE_EVT_SOURCE,
  63                "CFFileDescriptor callback, flags=%d", flags);
  64
  65     wxCFEventLoopSource * const
  66         source = static_cast<wxCFEventLoopSource *>(ctxData);
  67
  68     wxEventLoopSourceHandler * const
  69         handler = source->GetHandler();
  70     if ( flags & kCFFileDescriptorReadCallBack )
  71         handler->OnReadWaiting();
  72     if ( flags & kCFFileDescriptorWriteCallBack )
  73         handler->OnWriteWaiting();
  74
  75     // we need to re-enable callbacks to be called again
  76     EnableDescriptorCallBacks(cffd, source->GetFlags());
  77 }
  78
  79 } // anonymous namespace
  80
  81 wxEventLoopSource *
  82 wxCFEventLoop::AddSourceForFD(int fd,
  83                               wxEventLoopSourceHandler *handler,
  84                               int flags)
  85 {
  86     wxCHECK_MSG( fd != -1, NULL, "can't monitor invalid fd" );
  87
  88     wxScopedPtr<wxCFEventLoopSource>
  89         source(new wxCFEventLoopSource(handler, flags));
  90
  91     CFFileDescriptorContext ctx = { 0, source.get(), NULL, NULL, NULL };
  92     wxCFRef<CFFileDescriptorRef>
  93         cffd(CFFileDescriptorCreate
  94              (
  95                   kCFAllocatorDefault,
  96                   fd,
  97                   true,   // close on invalidate
  98                   wx_cffiledescriptor_callback,
  99                   &ctx
 100              ));
 101     if ( !cffd )
 102         return NULL;
 103
 104     source->SetFileDescriptor(cffd.release());
 105
 106     wxCFRef<CFRunLoopSourceRef>
 107         cfsrc(CFFileDescriptorCreateRunLoopSource(kCFAllocatorDefault, cffd, 0));
 108     if ( !cfsrc )
 109         return NULL;
 110
 111     CFRunLoopRef cfloop = CFGetCurrentRunLoop();
 112     CFRunLoopAddSource(cfloop, cfsrc, kCFRunLoopDefaultMode);
 113
 114     return source.release();
 115 }
 116
 117 void wxCFEventLoopSource::SetFileDescriptor(CFFileDescriptorRef cffd)
 118 {
 119     wxASSERT_MSG( !m_cffd, "shouldn't be called more than once" );
 120
 121     m_cffd = cffd;
 122 }
 123
 124 wxCFEventLoopSource::~wxCFEventLoopSource()
 125 {
 126     if ( m_cffd )
 127         CFRelease(m_cffd);
 128 }
 129
 130 #else // OS X < 10.5
 131
 132 wxEventLoopSource *
 133 wxCFEventLoop::AddSourceForFD(int WXUNUSED(fd),
 134                               wxEventLoopSourceHandler * WXUNUSED(handler),
 135                               int WXUNUSED(flags))
 136 {
 137     return NULL;
 138 }
 139
 140 #endif // MAC_OS_X_VERSION_MAX_ALLOWED
 141
 142 #endif // wxUSE_EVENTLOOP_SOURCE