IPCMutex.hpp

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#ifndef _BLOCXX_IPCMUTEX_HPP_INCLUDE_GUARD_
#define _BLOCXX_IPCMUTEX_HPP_INCLUDE_GUARD_

#include "blocxx/BLOCXX_config.h"
// This class only works on Linux.
#ifdef BLOCXX_GNU_LINUX
#if !defined (BLOCXX_HAVE_SYS_IPC_H) && !defined (BLOCXX_HAVE_SYS_SEM_H)
 #error "Port me!"
#else

#include "blocxx/Exception.hpp"

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>


namespace BLOCXX_NAMESPACE
{

BLOCXX_DECLARE_APIEXCEPTION(IPCMutex, BLOCXX_COMMON_API);

class IPCMutex
{
public:
   IPCMutex(int semId); 
   ~IPCMutex() {}; 

   void wait(); 

   void signal(); 
   int getId() { return m_semid;}

   static void free(int semKey); 
private:
   int m_semid; 
   struct sembuf m_sbuf; 
   union semun
   {
      int val; 
      struct sumid_ds* buf; 
      unsigned short* array;
   } m_arg; 

}; 


class IPCMutexLock
{
public:
   IPCMutexLock(IPCMutex& sem); 
   ~IPCMutexLock(); 
private:
   IPCMutex& m_sem; 
}; 

} // end namespace

#endif // #if !defined (BLOCXX_HAVE_SYS_IPC_H) && !defined (BLOCXX_HAVE_SYS_SEM_H)
#endif // #ifdef BLOCXX_GNU_LINUX
#endif // #ifndef _IPCMUTEXLOCK_HPP_INCLUDE_GUARD_