ipc_sem.hpp

/* ipcsem.hpp */
/* $Id$ */
#ifndef __ipcsem_hpp
#define __ipcsem_hpp

#ifdef GE_BUILD
#include <types.hpp>
#else
#include <dcf/types.hpp>
#endif

#include <string>
#include <sys/types.h>

namespace dcf
{
  class IPCSem
  {
  public:
    
    IPCSem(bool is_local = true); 
    
    virtual ~IPCSem();
    
    dcf::error_t create(size_t res_num,           
            int id,                   
            const std::string &fname, 
            int mask = 0666);         
    dcf::error_t create(size_t res_num,           
            key_t key,                
            int mask = 0666);         
    dcf::error_t operator++(){ return allocate(); }
    
    dcf::error_t operator--(){ return release(); }
    
    dcf::error_t allocate(size_t rn = 1);
    
    dcf::error_t release(size_t rn = 1);
    
  protected:
    
    int m_sid;
    
    key_t m_key;
    
    size_t m_res_num;
    
    int m_mask;
    
    bool m_is_local;
    
  private:
    
    int create_new_sem(size_t res_num, key_t key, 
               int mask, bool is_local) const;
  };
};

#endif /* ipcsem.hpp */