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testshm.cc

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extern "C"
{
#include <stdio.h>              /* printf(), scanf(), NULL */
#include <string.h>             /* strcpy() */
}
#include "sharedmem.hh"

#ifdef VXWORKS
extern "C" int testshm ();      /* make it easily shell-accessible */
int
testshm (int create)            /* run this in the foreground */
#else
int
main (int argc, char **argv)
#endif
{
  RCS_SHAREDMEM *shm;

#if defined (VXWORKS)
  shm =
    new RCS_SHAREDMEM (0x100, 256,
                       create ? RCS_SHAREDMEM_CREATE : RCS_SHAREDMEM_NOCREATE,
                       0664);
#else
  if (argc > 1)
    {
      /* any cmd line args mean this is the sharedmem creator */
      shm = new RCS_SHAREDMEM (0x100, 256, RCS_SHAREDMEM_CREATE, 0664);
    }
  else
    {
      shm = new RCS_SHAREDMEM (0x100, 256, RCS_SHAREDMEM_NOCREATE);
    }
#endif

  if (shm->addr == NULL)
    {
      printf ("can't create shared memory-- exiting\n");
      return 1;
    }

  /* run give and take, interactively */
  while (!feof (stdin))
    {
#define BUFFERSIZE 256
      char buf[BUFFERSIZE];
      fputs ("r, w, or q? ", stdout);
      fgets (buf, BUFFERSIZE, stdin);

      if (buf[0] == 'q')
        break;
      if (buf[0] == 'r')
        {
          printf ("%s\n", shm->addr);
        }
      if (buf[0] == 'w')
        {
          printf ("what string? ");
          scanf ("%s", buf);
          strcpy ((char *) shm->addr, buf);
        }
    }

  delete shm;
  return 0;
}

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