Local.hpp

   1 /* Cycript - Inlining/Optimizing JavaScript Compiler
   2  * Copyright (C) 2009  Jay Freeman (saurik)
   3 */
   4
   5 /* Modified BSD License {{{ */
   6 /*
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   8  * forms, with or without modification, are permitted
   9  * provided that the following conditions are met:
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  12  *    above copyright notice, this list of conditions
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  15  *    above copyright notice, this list of conditions
  16  *    and the following disclaimer in the documentation
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  19  * 3. The name of the author may not be used to endorse
  20  *    or promote products derived from this software
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  37 */
  38 /* }}} */
  39
  40 #ifndef CYLOCAL_HPP
  41 #define CYLOCAL_HPP
  42
  43 #include <pthread.h>
  44
  45 template <typename Type_>
  46 class CYLocal {
  47   private:
  48     static ::pthread_key_t key_;
  49
  50     Type_ *last_;
  51
  52   protected:
  53     static _finline void Set(Type_ *value) {
  54         _assert(::pthread_setspecific(key_, value) == 0);
  55     }
  56
  57     static ::pthread_key_t Key_() {
  58         ::pthread_key_t key;
  59         ::pthread_key_create(&key, NULL);
  60         return key;
  61     }
  62
  63   public:
  64     CYLocal(Type_ *next) {
  65         last_ = Get();
  66         Set(next);
  67     }
  68
  69     _finline ~CYLocal() {
  70         Set(last_);
  71     }
  72
  73     static _finline Type_ *Get() {
  74         return reinterpret_cast<Type_ *>(::pthread_getspecific(key_));
  75     }
  76 };
  77
  78 template <typename Type_>
  79 ::pthread_key_t CYLocal<Type_>::key_ = Key_();
  80
  81 #endif/*CYLOCAL_HPP*/