added wxTLS_TYPE() macro

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55019 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2008-08-08 02:59:32 +00:00
parent 375a5d3a93
commit 64a044d5a6
10 changed files with 773 additions and 121 deletions
--- a/include/wx/tls.h
+++ b/include/wx/tls.h
@@ -0,0 +1,72 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/tls.h
+// Purpose:     Implementation of thread local storage
+// Author:      Vadim Zeitlin
+// Created:     2008-08-08
+// RCS-ID:      $Id$
+// Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_TLS_H_
+#define _WX_TLS_H_
+
+#include "wx/defs.h"
+
+// ----------------------------------------------------------------------------
+// check for compiler support of thread-specific variables
+// ----------------------------------------------------------------------------
+
+#ifdef HAVE___THREAD_KEYWORD
+    #define wxHAS_COMPILER_TLS
+    #define wxTHREAD_SPECIFIC_DECL __thread
+#elif wxCHECK_VISUALC_VERSION(7)
+    #define wxHAS_COMPILER_TLS
+    #define wxTHREAD_SPECIFIC_DECL __declspec(thread)
+#endif
+
+// ----------------------------------------------------------------------------
+// define wxTLS_TYPE()
+// ----------------------------------------------------------------------------
+
+#ifdef wxHAS_COMPILER_TLS
+    #define wxTLS_TYPE(T) wxTHREAD_SPECIFIC_DECL T
+#else // !wxHAS_COMPILER_TLS
+    #ifdef __WXMSW__
+        #include "wx/msw/tls.h"
+    #elif defined(__UNIX__)
+        #include "wx/unix/tls.h"
+    #else
+        // TODO: we could emulate TLS for such platforms...
+        #error Neither compiler nor OS support thread-specific variables.
+    #endif
+
+    // wxTlsValue<T> represents a thread-specific value of type T
+    template <typename T>
+    class wxTlsValue
+    {
+    public:
+        typedef T ValueType;
+
+        wxTlsValue() { *this = static_cast<T>(0); }
+
+        wxTlsValue& operator=(T value)
+        {
+            m_key.Set(wxUIntToPtr(value));
+
+            return *this;
+        }
+
+        operator T() const { return wxPtrToUInt(m_key.Get()); }
+
+    private:
+        wxTlsKey m_key;
+
+        DECLARE_NO_COPY_TEMPLATE_CLASS(wxTlsValue, T)
+    };
+
+    #define wxTLS_TYPE(T) wxTlsValue<T>
+#endif // wxHAS_COMPILER_TLS/!wxHAS_COMPILER_TLS
+
+#endif // _WX_TLS_H_
+