reg_exp_definer.h

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// 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
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// 


#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_