rom/graphics/closemonitor.c

   1 /*
   2     Copyright © 1995-2010, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function CloseMonitor()
   6     Lang: english
   7 */
   8 #include <aros/debug.h>
   9 #include <graphics/monitor.h>
  10
  11 #include "graphics_intern.h"
  12
  13 /*****************************************************************************
  14
  15     NAME */
  16 #include <proto/graphics.h>
  17
  18         AROS_LH1(LONG, CloseMonitor,
  19
  20 /*  SYNOPSIS */
  21         AROS_LHA(struct MonitorSpec *, monitor_spec, A0),
  22
  23 /*  LOCATION */
  24         struct GfxBase *, GfxBase, 120, Graphics)
  25
  26 /*  FUNCTION
  27
  28     INPUTS
  29         monitor_spec - pointer to a MonitorSpec opened via OpenMonitor(),
  30                        or NULL
  31
  32     RESULT
  33         error - FALSE if MonitorSpec closed uneventfully
  34                 TRUE if MonitorSpec could not be closed
  35
  36     NOTES
  37
  38     EXAMPLE
  39
  40     BUGS
  41
  42     SEE ALSO
  43         OpenMonitor(), graphics/monitor.h
  44
  45     INTERNALS
  46
  47     HISTORY
  48
  49
  50 ******************************************************************************/
  51 {
  52     AROS_LIBFUNC_INIT
  53
  54     BOOL res = TRUE;
  55
  56     if (monitor_spec != NULL) {
  57         ObtainSemaphore(&monitor_spec->DisplayInfoDataBaseSemaphore);
  58
  59         if (monitor_spec->ms_OpenCount) {
  60             monitor_spec->ms_OpenCount--;
  61             res = FALSE;
  62         }
  63
  64         ReleaseSemaphore(&monitor_spec->DisplayInfoDataBaseSemaphore);
  65     }
  66
  67     return res;
  68
  69     AROS_LIBFUNC_EXIT
  70 } /* CloseMonitor */