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 #include "wx/evtloopsrc.h"
  31
  32 #include "wx/scopedptr.h"
  33
  34 #include "wx/osx/private.h"
  35 #include "wx/osx/core/cfref.h"
  36
  37 // ============================================================================
  38 // wxCFEventLoopSource and wxCFEventLoop implementation
  39 // ============================================================================
  40
  41 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
  42 namespace
  43 {
  44
  45 void EnableDescriptorCallBacks(CFFileDescriptorRef cffd, int flags)
  46 {
  47     if ( flags & wxEVENT_SOURCE_INPUT )
  48         CFFileDescriptorEnableCallBacks(cffd, kCFFileDescriptorReadCallBack);
  49     if ( flags & wxEVENT_SOURCE_OUTPUT )
  50         CFFileDescriptorEnableCallBacks(cffd, kCFFileDescriptorWriteCallBack);
  51 }
  52
  53 void
  54 wx_cffiledescriptor_callback(CFFileDescriptorRef cffd,
  55                              CFOptionFlags flags,
  56                              void *ctxData)
  57 {
  58     wxLogTrace(wxTRACE_EVT_SOURCE,
  59                "CFFileDescriptor callback, flags=%d", flags);
  60
  61     wxCFEventLoopSource * const
  62         source = static_cast<wxCFEventLoopSource *>(ctxData);
  63
  64     wxEventLoopSourceHandler * const
  65         handler = source->GetHandler();
  66     if ( flags & kCFFileDescriptorReadCallBack )
  67         handler->OnReadWaiting();
  68     if ( flags & kCFFileDescriptorWriteCallBack )
  69         handler->OnWriteWaiting();
  70
  71     // we need to re-enable callbacks to be called again
  72     EnableDescriptorCallBacks(cffd, source->GetFlags());
  73 }
  74
  75 } // anonymous namespace
  76
  77 wxEventLoopSource *
  78 wxCFEventLoop::AddSourceForFD(int fd,
  79                               wxEventLoopSourceHandler *handler,
  80                               int flags)
  81 {
  82     wxCHECK_MSG( fd != -1, NULL, "can't monitor invalid fd" );
  83
  84     wxScopedPtr<wxCFEventLoopSource>
  85         source(new wxCFEventLoopSource(handler, flags));
  86
  87     CFFileDescriptorContext ctx = { 0, source.get(), NULL, NULL, NULL };
  88     wxCFRef<CFFileDescriptorRef>
  89         cffd(CFFileDescriptorCreate
  90              (
  91                   kCFAllocatorDefault,
  92                   fd,
  93                   true,   // close on invalidate
  94                   wx_cffiledescriptor_callback,
  95                   &ctx
  96              ));
  97     if ( !cffd )
  98         return NULL;
  99
 100     source->SetFileDescriptor(cffd.release());
 101
 102     wxCFRef<CFRunLoopSourceRef>
 103         cfsrc(CFFileDescriptorCreateRunLoopSource(kCFAllocatorDefault, cffd, 0));
 104     if ( !cfsrc )
 105         return NULL;
 106
 107     CFRunLoopRef cfloop = CFGetCurrentRunLoop();
 108     CFRunLoopAddSource(cfloop, cfsrc, kCFRunLoopDefaultMode);
 109
 110     return source.release();
 111 }
 112
 113 void wxCFEventLoopSource::SetFileDescriptor(CFFileDescriptorRef cffd)
 114 {
 115     wxASSERT_MSG( !m_cffd, "shouldn't be called more than once" );
 116
 117     m_cffd = cffd;
 118 }
 119
 120 wxCFEventLoopSource::~wxCFEventLoopSource()
 121 {
 122     if ( m_cffd )
 123         CFRelease(m_cffd);
 124 }
 125
 126 #else // OS X < 10.5
 127
 128 wxEventLoopSource *
 129 wxCFEventLoop::AddSourceForFD(int WXUNUSED(fd),
 130                               wxEventLoopSourceHandler * WXUNUSED(handler),
 131                               int WXUNUSED(flags))
 132 {
 133     return NULL;
 134 }
 135
 136 #endif // MAC_OS_X_VERSION_MAX_ALLOWED
 137
 138 #endif // wxUSE_EVENTLOOP_SOURCE