include/wx/msw/tls.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/unix/tls.h
   3 // Purpose:     Win32 implementation of wxTlsValue<>
   4 // Author:      Vadim Zeitlin
   5 // Created:     2008-08-08
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_MSW_TLS_H_
  12 #define _WX_MSW_TLS_H_
  13
  14 #include "wx/msw/wrapwin.h"
  15
  16 // ----------------------------------------------------------------------------
  17 // wxTlsKey is a helper class encapsulating a TLS slot
  18 // ----------------------------------------------------------------------------
  19
  20 class wxTlsKey
  21 {
  22 public:
  23     // ctor allocates a new key
  24     wxTlsKey()
  25     {
  26         m_slot = ::TlsAlloc();
  27     }
  28
  29     // return true if the key was successfully allocated
  30     bool IsOk() const { return m_slot != TLS_OUT_OF_INDEXES; }
  31
  32     // get the key value, there is no error return
  33     void *Get() const
  34     {
  35         return ::TlsGetValue(m_slot);
  36     }
  37
  38     // change the key value, return true if ok
  39     bool Set(void *value)
  40     {
  41         return ::TlsSetValue(m_slot, value) != 0;
  42     }
  43
  44     // free the key
  45     ~wxTlsKey()
  46     {
  47         if ( IsOk() )
  48             ::TlsFree(m_slot);
  49     }
  50
  51 private:
  52     DWORD m_slot;
  53
  54     wxDECLARE_NO_COPY_CLASS(wxTlsKey);
  55 };
  56
  57 #endif // _WX_MSW_TLS_H_
  58