src/common/threadinfo.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/threadinfo.cpp
   3 // Purpose:     declaration of wxThreadSpecificInfo: thread-specific information
   4 // Author:      Vaclav Slavik
   5 // Created:     2013-09-14
   6 // Copyright:   (c) 2013 Vaclav Slavik <vslavik@fastmail.fm>
   7 // Licence:     wxWindows licence
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if defined(__BORLANDC__)
  14     #pragma hdrstop
  15 #endif
  16
  17 #include "wx/private/threadinfo.h"
  18
  19 #if wxUSE_THREADS
  20
  21 #include "wx/tls.h"
  22 #include "wx/thread.h"
  23 #include "wx/sharedptr.h"
  24 #include "wx/vector.h"
  25
  26 namespace
  27 {
  28
  29 // All thread info objects are stored in a global list so that they are
  30 // freed when global objects are destroyed and no memory leaks are reported.
  31 wxCriticalSection g_csAllThreadInfos;
  32 typedef wxVector< wxSharedPtr<wxThreadSpecificInfo> > wxAllThreadInfos;
  33 wxAllThreadInfos g_allThreadInfos;
  34
  35 // Pointer to currenct thread's instance
  36 wxTLS_TYPE(wxThreadSpecificInfo*) g_thisThreadInfo;
  37
  38 } // anonymous namespace
  39
  40
  41 wxThreadSpecificInfo& wxThreadSpecificInfo::Get()
  42 {
  43     if ( !wxTLS_VALUE(g_thisThreadInfo) )
  44     {
  45         wxTLS_VALUE(g_thisThreadInfo) = new wxThreadSpecificInfo;
  46         wxCriticalSectionLocker lock(g_csAllThreadInfos);
  47         g_allThreadInfos.push_back(
  48                 wxSharedPtr<wxThreadSpecificInfo>(wxTLS_VALUE(g_thisThreadInfo)));
  49     }
  50     return *wxTLS_VALUE(g_thisThreadInfo);
  51 }
  52
  53 void wxThreadSpecificInfo::ThreadCleanUp()
  54 {
  55     if ( !wxTLS_VALUE(g_thisThreadInfo) )
  56         return; // nothing to do, not used by this thread at all
  57
  58     // find this thread's instance in g_allThreadInfos and destroy it
  59     wxCriticalSectionLocker lock(g_csAllThreadInfos);
  60     for ( wxAllThreadInfos::iterator i = g_allThreadInfos.begin();
  61           i != g_allThreadInfos.end();
  62           ++i )
  63     {
  64         if ( i->get() == wxTLS_VALUE(g_thisThreadInfo) )
  65         {
  66             g_allThreadInfos.erase(i);
  67             wxTLS_VALUE(g_thisThreadInfo) = NULL;
  68             break;
  69         }
  70     }
  71 }
  72
  73 #else // !wxUSE_THREADS
  74
  75 wxThreadSpecificInfo& wxThreadSpecificInfo::Get()
  76 {
  77     static wxThreadSpecificInfo s_instance;
  78     return s_instance;
  79 }
  80
  81 #endif // wxUSE_THREADS/wxUSE_THREADS