rom/intuition/unlockpubscreen.c

   1 /*
   2     Copyright  1995-2010, The AROS Development Team. All rights reserved.
   3     Copyright  2001-2003, The MorphOS Development Team. All Rights Reserved.
   4     $Id$
   5 */
   6
   7 #include "intuition_intern.h"
   8
   9 static struct PubScreenNode *findcasename(struct List *list, const UBYTE *name);
  10
  11 /*****************************************************************************
  12
  13     NAME */
  14 #include <proto/intuition.h>
  15
  16     AROS_LH2(void, UnlockPubScreen,
  17
  18 /*  SYNOPSIS */
  19          AROS_LHA(UBYTE         *, name, A0),
  20          AROS_LHA(struct Screen *, screen, A1),
  21
  22 /*  LOCATION */
  23          struct IntuitionBase *, IntuitionBase, 86, Intuition)
  24
  25 /*  FUNCTION
  26     Release a lock to a screen locked by LockPubScreen().
  27     Identify screen by the pointer returned from LockPubScreen()
  28     and pass NULL name in normal cases.
  29     Sometimes it might be useful to specify the name string. In
  30     this case the screen pointer will be ignored.
  31
  32     INPUTS
  33     name - Name of the public screen to unlock. The name is case insensitive.
  34     screen - Pointer to the screen to unlock
  35
  36     RESULT
  37
  38     NOTES
  39     The screen parameter will be ignored if name is non-NULL
  40
  41     EXAMPLE
  42
  43     BUGS
  44
  45     SEE ALSO
  46     LockPubScreen()
  47
  48     INTERNALS
  49
  50     HISTORY
  51
  52 *****************************************************************************/
  53 {
  54     AROS_LIBFUNC_INIT
  55
  56     struct List *publist;
  57
  58     DEBUG_UNLOCKPUBSCREEN(dprintf("UnlockPubScreen: name <%s> screen %p\n",
  59                                   name ? (const char *)name : "NULL", screen));
  60     DEBUG_UNLOCKPUBSCREEN(dprintf("LockPubScreen: task %p <%s>\n",
  61                                   SysBase->ThisTask,
  62                                   SysBase->ThisTask->tc_Node.ln_Name ? SysBase->ThisTask->tc_Node.ln_Name : "NULL"));
  63
  64     publist = LockPubScreenList();
  65
  66     if (name != NULL)
  67     {
  68         struct PubScreenNode *psn;
  69
  70         /* Get screen by its name */
  71         if ((psn = findcasename(publist, name)))
  72             screen = psn->psn_Screen;
  73         else
  74             screen = NULL;
  75
  76         DEBUG_UNLOCKPUBSCREEN(dprintf("UnlockPubScreen: found screen %p\n",
  77                                       screen));
  78     }
  79
  80     if (screen != NULL)
  81     {
  82         struct PubScreenNode *ps = GetPrivScreen(screen)->pubScrNode;
  83
  84         //ASSERT(GetPrivScreen(screen)->pubScrNode != NULL);
  85         //ASSERT(GetPrivScreen(screen)->pubScrNode->psn_VisitorCount > 0);
  86
  87         /* Unlock screen */
  88         ps->psn_VisitorCount--;
  89
  90         DEBUG_VISITOR(dprintf("UnlockPubScreen: count %d <%s>\n",
  91                               ps->psn_VisitorCount,
  92                               FindTask(NULL)->tc_Node.ln_Name));
  93
  94
  95         DEBUG_UNLOCKPUBSCREEN(dprintf("UnlockPubScreen: count %d\n",
  96                                       ps->psn_VisitorCount));
  97
  98         /* Notify screen owner if this is (was) the last window on the
  99            screen */
 100         if(ps->psn_VisitorCount == 0)
 101         {
 102             if(ps->psn_SigTask != NULL)
 103                 Signal(ps->psn_SigTask, 1 << ps->psn_SigBit);
 104         }
 105
 106     }
 107
 108     UnlockPubScreenList();
 109
 110     FireScreenNotifyMessage((IPTR) name, SNOTIFY_UNLOCKPUBSCREEN, IntuitionBase);
 111
 112     AROS_LIBFUNC_EXIT
 113 } /* UnlockPubScreen */
 114
 115
 116 /* case insensitive FindName() */
 117 static struct PubScreenNode *findcasename(struct List *list, const UBYTE *name)
 118 {
 119     struct Node *node;
 120
 121     for (node = GetHead(list); node; node = GetSucc(node))
 122     {
 123         if(node->ln_Name)
 124         {
 125             if (!strcasecmp (node->ln_Name, name))
 126                 break;
 127         }
 128     }
 129     return (struct PubScreenNode *)node;
 130 }