include/wx/os2/tls.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/os2/tls.h
   3 // Purpose:     OS/2 implementation of wxTlsValue<>
   4 // Author:      Stefan Neis
   5 // Created:     2008-08-30
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Stefan Neis
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_MSW_TLS_H_
  12 #define _WX_MSW_TLS_H_
  13
  14 #include "wx/os2/private.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         APIRET rc = ::DosAllocThreadLocalMemory(1, &m_slot);
  27         if (rc != NO_ERROR)
  28             m_slot = NULL;
  29     }
  30
  31     // return true if the key was successfully allocated
  32     bool IsOk() const { return m_slot != NULL; }
  33
  34     // get the key value, there is no error return
  35     void *Get() const
  36     {
  37         return (void *)m_slot;
  38     }
  39
  40     // change the key value, return true if ok
  41     bool Set(void *value)
  42     {
  43         m_slot = (ULONG*)value;
  44         return true;
  45     }
  46
  47     // free the key
  48     ~wxTlsKey()
  49     {
  50         if ( IsOk() )
  51             ::DosFreeThreadLocalMemory(m_slot);
  52     }
  53
  54 private:
  55     ULONG* m_slot;
  56
  57     DECLARE_NO_COPY_CLASS(wxTlsKey)
  58 };
  59
  60 #endif // _WX_MSW_TLS_H_
  61