bauxite:チラシの裏 - OS2/emx/syscall/

OS2/emx/syscall/_pipe

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[[OS2]]/[[emx|OS2/emx]]/[[syscall|OS2/emx/syscall]]/_pipe

emx 内部ではネームドパイプを使って実装されているみたいです。

emx/src/os2/fileio.c から:
<pre>
int do_pipe (int *dst, ULONG pipesize)
{
  HPIPE r_handle, w_handle, nh;
  ULONG rc, action, pn;
  char fname[128];
  int e;

/* Create unique a pipe name (unique on this system). */

LOCK_COMMON;
  pn = ++pipe_number;
  UNLOCK_COMMON;
  sprintf (fname, "/pipe/emx/pipes/%.8x.pip", (unsigned)pn);

/* Create the pipe. */

rc = DosCreateNPipe (fname, &r_handle,
                       NP_ACCESS_INBOUND,
                       1 | NP_NOWAIT | NP_TYPE_BYTE | NP_READMODE_BYTE,
                       pipesize, pipesize, 0);
  if (rc != 0)
    return set_error (rc);

/* Connect to the pipe. */

rc = DosConnectNPipe (r_handle);
  if (rc != 0 && rc != ERROR_PIPE_NOT_CONNECTED)
    {
      DosClose (r_handle);
      return set_error (rc);
    }

/* Turn on NP_WAIT. */

rc = DosSetNPHState (r_handle, NP_WAIT | NP_READMODE_BYTE);
  if (rc != 0)
    {
      DosClose (r_handle);
      return set_error (rc);
    }

/* Open the write side of the pipe. */

rc = DosOpen (fname, &w_handle, &action, 0, FILE_NORMAL,
                OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW,
                OPEN_ACCESS_WRITEONLY | OPEN_SHARE_DENYREADWRITE,
                NULL);
  if (rc != 0)
    {
      DosClose (r_handle);
      return set_error (rc);
    }

/* Update the file handle table. */

e = reloc_handle (r_handle, &nh, TRUE);
  if (e != 0)
    {
      DosClose (r_handle);
      DosClose (w_handle);
      return e;
    }
  r_handle = nh;

e = reloc_handle (w_handle, &nh, TRUE);
  if (e != 0)
    {
      DosClose (r_handle);
      DosClose (w_handle);
      return e;
    }
  w_handle = nh;

/* Set DST handles. */

dst[0] = r_handle;
  dst[1] = w_handle;
  return 0;
}
</pre>

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OS2/emx/syscall/_pipe

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