Local.hpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2010  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #ifndef CYCRIPT_LOCAL_HPP
  23 #define CYCRIPT_LOCAL_HPP
  24
  25 #include <pthread.h>
  26
  27 template <typename Type_>
  28 class CYLocal {
  29   private:
  30     static ::pthread_key_t key_;
  31
  32     Type_ *last_;
  33
  34   protected:
  35     static _finline void Set(Type_ *value) {
  36         _assert(::pthread_setspecific(key_, value) == 0);
  37     }
  38
  39     static ::pthread_key_t Key_() {
  40         ::pthread_key_t key;
  41         ::pthread_key_create(&key, NULL);
  42         return key;
  43     }
  44
  45   public:
  46     CYLocal(Type_ *next) {
  47         last_ = Get();
  48         Set(next);
  49     }
  50
  51     _finline ~CYLocal() {
  52         Set(last_);
  53     }
  54
  55     static _finline Type_ *Get() {
  56         return reinterpret_cast<Type_ *>(::pthread_getspecific(key_));
  57     }
  58 };
  59
  60 template <typename Type_>
  61 ::pthread_key_t CYLocal<Type_>::key_ = Key_();
  62
  63 #endif/*CYCRIPT_LOCAL_HPP*/