remove unused variable assignment, closes #14928
[wxWidgets.git] / include / wx / unix / tls.h
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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
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14#include <pthread.h>
15
16// ----------------------------------------------------------------------------
17// wxTlsKey is a helper class encapsulating the TLS value index
18// ----------------------------------------------------------------------------
19
20class wxTlsKey
21{
22public:
8b73c531 23 // ctor allocates a new key and possibly registering a destructor function
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24 // for it
25 wxTlsKey(wxTlsDestructorFunction destructor)
64a044d5 26 {
49e714e1 27 m_destructor = destructor;
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28 if ( pthread_key_create(&m_key, destructor) != 0 )
29 m_key = 0;
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30 }
31
32 // return true if the key was successfully allocated
33 bool IsOk() const { return m_key != 0; }
34
35 // get the key value, there is no error return
36 void *Get() const
37 {
38 return pthread_getspecific(m_key);
39 }
40
41 // change the key value, return true if ok
42 bool Set(void *value)
43 {
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44 void *old = Get();
45 if ( old )
46 m_destructor(old);
47
8b73c531 48 return pthread_setspecific(m_key, value) == 0;
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49 }
50
51 // free the key
52 ~wxTlsKey()
53 {
54 if ( IsOk() )
55 pthread_key_delete(m_key);
56 }
57
58private:
49e714e1 59 wxTlsDestructorFunction m_destructor;
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60 pthread_key_t m_key;
61
c0c133e1 62 wxDECLARE_NO_COPY_CLASS(wxTlsKey);
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63};
64
65#endif // _WX_UNIX_TLS_H_
66