ceph/src/boost/boost/thread/tss.hpp

   1 #ifndef BOOST_THREAD_TSS_HPP
   2 #define BOOST_THREAD_TSS_HPP
   3 // Distributed under the Boost Software License, Version 1.0. (See
   4 // accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6 // (C) Copyright 2007-8 Anthony Williams
   7
   8 #include <boost/thread/detail/config.hpp>
   9
  10 #include <boost/type_traits/add_reference.hpp>
  11
  12 #include <boost/config/abi_prefix.hpp>
  13
  14 namespace boost
  15 {
  16     namespace detail
  17     {
  18         namespace thread
  19         {
  20             typedef void(*cleanup_func_t)(void*);
  21             typedef void(*cleanup_caller_t)(cleanup_func_t, void*);
  22         }
  23
  24         BOOST_THREAD_DECL void set_tss_data(void const* key,detail::thread::cleanup_caller_t caller,detail::thread::cleanup_func_t func,void* tss_data,bool cleanup_existing);
  25         BOOST_THREAD_DECL void* get_tss_data(void const* key);
  26     }
  27
  28     template <typename T>
  29     class thread_specific_ptr
  30     {
  31     private:
  32         thread_specific_ptr(thread_specific_ptr&);
  33         thread_specific_ptr& operator=(thread_specific_ptr&);
  34
  35         typedef void(*original_cleanup_func_t)(T*);
  36
  37         static void default_deleter(T* data)
  38         {
  39             delete data;
  40         }
  41
  42         static void cleanup_caller(detail::thread::cleanup_func_t cleanup_function,void* data)
  43         {
  44             reinterpret_cast<original_cleanup_func_t>(cleanup_function)(static_cast<T*>(data));
  45         }
  46
  47
  48         detail::thread::cleanup_func_t cleanup;
  49
  50     public:
  51         typedef T element_type;
  52
  53         thread_specific_ptr():
  54             cleanup(reinterpret_cast<detail::thread::cleanup_func_t>(&default_deleter))
  55         {}
  56         explicit thread_specific_ptr(void (*func_)(T*))
  57           : cleanup(reinterpret_cast<detail::thread::cleanup_func_t>(func_))
  58         {}
  59         ~thread_specific_ptr()
  60         {
  61             detail::set_tss_data(this,0,0,0,true);
  62         }
  63
  64         T* get() const
  65         {
  66             return static_cast<T*>(detail::get_tss_data(this));
  67         }
  68         T* operator->() const
  69         {
  70             return get();
  71         }
  72         typename add_reference<T>::type operator*() const
  73         {
  74             return *get();
  75         }
  76         T* release()
  77         {
  78             T* const temp=get();
  79             detail::set_tss_data(this,0,0,0,false);
  80             return temp;
  81         }
  82         void reset(T* new_value=0)
  83         {
  84             T* const current_value=get();
  85             if(current_value!=new_value)
  86             {
  87                 detail::set_tss_data(this,&cleanup_caller,cleanup,new_value,true);
  88             }
  89         }
  90     };
  91 }
  92
  93 #include <boost/config/abi_suffix.hpp>
  94
  95 #endif