include/wx/unix/tls.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/unix/tls.h
   3 // Purpose:     Pthreads 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_UNIX_TLS_H_
  12 #define _WX_UNIX_TLS_H_
  13
  14 #include "wx/intl.h"
  15 #include "wx/log.h"
  16
  17 #include <pthread.h>
  18
  19 // ----------------------------------------------------------------------------
  20 // wxTlsKey is a helper class encapsulating the TLS value index
  21 // ----------------------------------------------------------------------------
  22
  23 class wxTlsKey
  24 {
  25 public:
  26     // ctor allocates a new key
  27     wxTlsKey()
  28     {
  29         int rc = pthread_key_create(&m_key, NULL);
  30         if ( rc )
  31             wxLogSysError(_("Creating TLS key failed"), rc);
  32     }
  33
  34     // return true if the key was successfully allocated
  35     bool IsOk() const { return m_key != 0; }
  36
  37     // get the key value, there is no error return
  38     void *Get() const
  39     {
  40         return pthread_getspecific(m_key);
  41     }
  42
  43     // change the key value, return true if ok
  44     bool Set(void *value)
  45     {
  46         int rc = pthread_setspecific(m_key, value);
  47         if ( rc )
  48         {
  49             wxLogSysError(_("Failed to set TLS value"));
  50             return false;
  51         }
  52
  53         return true;
  54     }
  55
  56     // free the key
  57     ~wxTlsKey()
  58     {
  59         if ( IsOk() )
  60             pthread_key_delete(m_key);
  61     }
  62
  63 private:
  64     pthread_key_t m_key;
  65
  66     DECLARE_NO_COPY_CLASS(wxTlsKey)
  67 };
  68
  69 #endif // _WX_UNIX_TLS_H_
  70