rom/intuition/getmonitorlist.c

   1 /*
   2     Copyright © 2010, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Get a copy of monitors list
   6 */
   7
   8 #include <intuition/extensions.h>
   9 #include <proto/exec.h>
  10 #include <proto/utility.h>
  11
  12 #include "intuition_intern.h"
  13 #include "monitorclass_private.h"
  14
  15 /*****************************************************************************
  16
  17     NAME */
  18
  19 #include <proto/intuition.h>
  20
  21     AROS_LH1(Object **, GetMonitorList,
  22
  23 /*  SYNOPSIS */
  24          AROS_LHA(struct TagItem *, tags, A1),
  25
  26 /*  LOCATION */
  27          struct IntuitionBase *, IntuitionBase, 163, Intuition)
  28
  29 /*  FUNCTION
  30         Obtain an array of monitorclass objects installed in the
  31         system
  32
  33     INPUTS
  34         tags - an optional pointer to a taglist with additional options.
  35                Currently only one tag is defined:
  36
  37                GMLA_DisplayID - list only monitors matching the given
  38                                 display ID
  39
  40     RESULT
  41         A pointer to a NULL-terminated array of BOOPSI object pointers.
  42         This is a copy of internal list, you need to free it using
  43         FreeMonitorList()
  44
  45     NOTES
  46         This function is compatible with MorphOS v2.
  47
  48     EXAMPLE
  49
  50     BUGS
  51
  52     SEE ALSO
  53         FreeMonitorList()
  54
  55     INTERNALS
  56
  57     HISTORY
  58
  59 *****************************************************************************/
  60 {
  61     AROS_LIBFUNC_INIT
  62
  63     struct MinNode *n;
  64     Object **res;
  65     ULONG num = 1;
  66     ULONG id = GetTagData(GMLA_DisplayID, INVALID_ID, tags);
  67
  68     ObtainSemaphoreShared(&GetPrivIBase(IntuitionBase)->MonitorListSem);
  69
  70     for (n = GetPrivIBase(IntuitionBase)->MonitorList.mlh_Head; n->mln_Succ; n = n->mln_Succ) {
  71         if ((id == INVALID_ID) || DoMethod((Object *)n, MM_CheckID, id))
  72             num++;
  73     }
  74
  75     res = AllocVec(num * sizeof(Object *), MEMF_ANY);
  76
  77     if (res) {
  78         num = 0;
  79         for (n = GetPrivIBase(IntuitionBase)->MonitorList.mlh_Head; n->mln_Succ; n = n->mln_Succ) {
  80             if ((id == INVALID_ID) || DoMethod((Object *)n, MM_CheckID, id))
  81                 res[num++] = (Object *)n;
  82         }
  83         res[num] = NULL;
  84     }
  85
  86     ReleaseSemaphore(&GetPrivIBase(IntuitionBase)->MonitorListSem);
  87
  88     return res;
  89
  90     AROS_LIBFUNC_EXIT
  91 }