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sem.hh

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#ifndef SEMAPHORE_HH
#define SEMAPHORE_HH

extern "C"
{
#include "_sem.h"               /* rcs_sem_t */
#ifndef UNDER_CE
#include <sys/stat.h>           /* S_IRUSR, etc. */
#endif
}
/* rw-rw-rw- permissions */
#ifndef WIN32
#define DEFAULT_SEM_MODE (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
#else
#define DEFAULT_SEM_MODE (0)
#endif

#define RCS_SEMAPHORE_NOCREATE 0x00     /* just attach to existing semaphore */
#define RCS_SEMAPHORE_CREATE 0x01       /* create semaphore */

class RCS_SEMAPHORE
{
public:
  RCS_SEMAPHORE (unsigned long int id, int oflag, double _timeout,
                 int mode = DEFAULT_SEM_MODE, int state = 0);
   ~RCS_SEMAPHORE ();
  int wait ();
  int trywait ();
  int post ();
  int flush ();
  int getvalue ();
  /* additional non-POSIX functions */
  int setflag (int oflag);      /* change oflag-- one can toggle the
                                   state of this being the master, so
                                   that flexible destruction of OS
                                   semaphore can be done */
  int valid ();
  int clear ();                 // Make sure this semaphore will not
  // immediately be available.

  unsigned long int id;
  double timeout;
  int oflag;
  int mode;
  int state;
  rcs_sem_t *sem;
  unsigned int sval;

private:
    RCS_SEMAPHORE (RCS_SEMAPHORE & sem);        //  Don't copy me.

};

#endif

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