compiler/alib/createextio.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8
   9 #include <exec/memory.h>
  10 #include <proto/exec.h>
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15 #include <exec/io.h>
  16 #include <proto/alib.h>
  17
  18         struct IORequest * CreateExtIO(
  19
  20 /*  SYNOPSIS */
  21         struct MsgPort * port,
  22         ULONG            iosize)
  23
  24 /*  FUNCTION
  25         Create an extended IORequest structure. This structure must be freed
  26         with DeleteExtIO().
  27
  28     INPUTS
  29         port - MsgPort to be signaled on events. May be NULL, in which case
  30             no IORequest is allocated.
  31         iosize - Size of the structure
  32
  33     RESULT
  34         A pointer to the new IORequest structure, or NULL.
  35
  36     NOTES
  37
  38     EXAMPLE
  39
  40     BUGS
  41
  42     SEE ALSO
  43         CreateStdIO(), DeleteExtIO(), DeleteStdIO()
  44
  45     INTERNALS
  46
  47 ******************************************************************************/
  48 {
  49     struct IORequest *ioreq=NULL;
  50
  51     if (port && (ioreq = AllocMem(iosize, MEMF_CLEAR|MEMF_PUBLIC)))
  52     {
  53         /* Initialize the structure */
  54         ioreq->io_Message.mn_Node.ln_Type = NT_MESSAGE;
  55         ioreq->io_Message.mn_ReplyPort    = port;
  56         ioreq->io_Message.mn_Length       = iosize;
  57     }
  58
  59     return ioreq;
  60 }