text: // Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
  // All rights reserved.
  // 
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are met:
  // * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  // * Redistributions in binary form must reproduce the above copyright
  // notice, this list of conditions and the following disclaimer in the
  // documentation and/or other materials provided with the distribution.
  // * Neither the name of the Andrey N. Sabelnikov nor the
  // names of its contributors may be used to endorse or promote products
  // derived from this software without specific prior written permission.
  // 
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
  // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  // 
  
  
  #ifndef _REG_EXP_DEFINER_H_
  #define _REG_EXP_DEFINER_H_
  
  #include <atomic>
  #include <boost/regex.hpp>
  #include "syncobj.h"
  
  namespace epee
  {
    class global_regexp_critical_section
    {
    private:
      mutable critical_section regexp_lock;
    public:
      global_regexp_critical_section(){}
      critical_section& get_lock()const {return regexp_lock;}
    };
  
    const static global_regexp_critical_section gregexplock;
  
  #define STATIC_REGEXP_EXPR_1(var_name, xpr_text, reg_exp_flags) \
  	static std::atomic<bool> regexp_initialized_1(false);\
  	volatile uint32_t local_is_initialized_1 = regexp_initialized_1;\
  	if(!local_is_initialized_1)\
  	gregexplock.get_lock().lock();\
  	static const boost::regex	var_name(xpr_text , reg_exp_flags);\
  	if(!local_is_initialized_1)\
  {\
  	regexp_initialized_1 = true;\
  	gregexplock.get_lock().unlock();\
  }
  
  #define STATIC_REGEXP_EXPR_2(var_name, xpr_text, reg_exp_flags) \
  	static std::atomic<bool> regexp_initialized_2(false);\
  	volatile uint32_t local_is_initialized_2 = regexp_initialized_2;\
  	if(!local_is_initialized_2)\
  	gregexplock.get_lock().lock().lock();\
  	static const boost::regex	var_name(xpr_text , reg_exp_flags);\
  	if(!local_is_initialized_2)\
  {\
  	regexp_initialized_2 = true;\
  	gregexplock.get_lock().lock().unlock();\
  }
  
  #define STATIC_REGEXP_EXPR_3(var_name, xpr_text, reg_exp_flags) \
  	static std::atomic<bool> regexp_initialized_3(false);\
  	volatile uint32_t local_is_initialized_3 = regexp_initialized_3;\
  	if(!local_is_initialized_3)\
  	gregexplock.get_lock().lock().lock();\
  	static const boost::regex	var_name(xpr_text , reg_exp_flags);\
  	if(!local_is_initialized_3)\
  {\
  	regexp_initialized_3 = true;\
  	gregexplock.get_lock().lock().unlock();\
  }
  }
  
  #endif //_REG_EXP_DEFINER_H_
  