+ template <typename T>
+ class thread_specific_ptr
+ {
+ private:
+#ifdef _WIN32
+ DWORD dwTlsIndex;
+#else
+ pthread_key_t key;
+#endif
+
+ public:
+ thread_specific_ptr(void) {
+#ifdef _WIN32
+ dwTlsIndex = TlsAlloc();
+#else
+ pthread_key_create(&key, NULL);
+#endif
+ }
+
+ ~thread_specific_ptr() {
+#ifdef _WIN32
+ TlsFree(dwTlsIndex);
+#else
+ pthread_key_delete(key);
+#endif
+ }
+
+ inline T *
+ get(void) const {
+ void *ptr;
+#ifdef _WIN32
+ ptr = TlsGetValue(dwTlsIndex);
+#else
+ ptr = pthread_getspecific(key);
+#endif
+ return static_cast<T*>(ptr);
+ }
+
+ inline
+ operator T * (void) const
+ {
+ return get();
+ }
+
+ inline T *
+ operator -> (void) const
+ {
+ return get();
+ }
+
+ inline T *
+ operator = (T * new_value)
+ {
+ set(new_value);
+ return new_value;
+ }
+
+ inline void
+ set(T* new_value) {
+#ifdef _WIN32
+ TlsSetValue(dwTlsIndex, new_value);
+#else
+ pthread_setspecific(key, new_value);
+#endif
+ }
+ };
+
+