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 /*****************************************************************************
  12
  13     NAME */
  14 #include <proto/graphics.h>
  15
  16         AROS_LH1(LONG, CloseMonitor,
  17
  18 /*  SYNOPSIS */
  19         AROS_LHA(struct MonitorSpec *, monitor_spec, A0),
  20
  21 /*  LOCATION */
  22         struct GfxBase *, GfxBase, 120, Graphics)
  23
  24 /*  FUNCTION
  25
  26     INPUTS
  27         monitor_spec - pointer to a MonitorSpec opened via OpenMonitor(),
  28                        or NULL
  29
  30     RESULT
  31         error - FALSE if MonitorSpec closed uneventfully
  32                 TRUE if MonitorSpec could not be closed
  33
  34     NOTES
  35
  36     EXAMPLE
  37
  38     BUGS
  39
  40     SEE ALSO
  41         OpenMonitor(), graphics/monitor.h
  42
  43     INTERNALS
  44
  45     HISTORY
  46
  47
  48 ******************************************************************************/
  49 {
  50     AROS_LIBFUNC_INIT
  51
  52     BOOL res = TRUE;
  53
  54     ObtainSemaphore(&monitor_spec->DisplayInfoDataBaseSemaphore);
  55
  56     if (monitor_spec->ms_OpenCount) {
  57         monitor_spec->ms_OpenCount--;
  58         res = FALSE;
  59     }
  60
  61     ReleaseSemaphore(&monitor_spec->DisplayInfoDataBaseSemaphore);
  62
  63     return res;
  64
  65     AROS_LIBFUNC_EXIT
  66 } /* CloseMonitor */