workbench/devs/diskimage/support/diskimagedevice.c

   1 /* Copyright 2007-2012 Fredrik Wikstrom. All rights reserved.
   2 **
   3 ** Redistribution and use in source and binary forms, with or without
   4 ** modification, are permitted provided that the following conditions
   5 ** are met:
   6 **
   7 ** 1. Redistributions of source code must retain the above copyright
   8 **    notice, this list of conditions and the following disclaimer.
   9 **
  10 ** 2. Redistributions in binary form must reproduce the above copyright
  11 **    notice, this list of conditions and the following disclaimer in the
  12 **    documentation and/or other materials provided with the distribution.
  13 **
  14 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  15 ** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16 ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17 ** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  18 ** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  19 ** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  20 ** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  21 ** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  22 ** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  23 ** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  24 ** POSSIBILITY OF SUCH DAMAGE.
  25 */
  26
  27 #include "support.h"
  28 #include <devices/diskimage.h>
  29 #include <proto/exec.h>
  30 //#include <proto/diskimage.h>
  31
  32 struct MsgPort *DiskImagePort;
  33 struct IORequest *DiskImageIO;
  34 struct Library *DiskImageBase;
  35
  36 BOOL OpenDiskImageDevice (ULONG unit_num) {
  37         DiskImagePort = CreateMsgPort();
  38         DiskImageIO = CreateIORequest(DiskImagePort, sizeof(struct IOExtTD));
  39         if (DiskImageIO) {
  40                 if (OpenDevice("diskimage.device", unit_num, DiskImageIO, 0) == IOERR_SUCCESS) {
  41                         DiskImageBase = (struct Library *)DiskImageIO->io_Device;
  42                         return TRUE;
  43                 }
  44         }
  45         CloseDiskImageDevice();
  46         return FALSE;
  47 }
  48
  49 void CloseDiskImageDevice (void) {
  50         if (DiskImageBase) {
  51                 CloseDevice(DiskImageIO);
  52                 DiskImageBase = NULL;
  53         }
  54         DeleteIORequest(DiskImageIO);
  55         DeleteMsgPort(DiskImagePort);
  56         DiskImageIO = NULL;
  57         DiskImagePort = NULL;
  58 }