rom/intuition/unlockpubscreen.c

   1 /*
   2     Copyright © 1995-2013, 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
  30         Sometimes it might be useful to specify the name string. In
  31         this case the screen pointer will be ignored.
  32
  33     INPUTS
  34         name - Name of the public screen to unlock. The name is case
  35             insensitive.
  36         screen - Pointer to the screen to unlock.
  37
  38     RESULT
  39         None.
  40
  41     NOTES
  42         The screen parameter will be ignored if name is non-NULL.
  43
  44     EXAMPLE
  45
  46     BUGS
  47
  48     SEE ALSO
  49         LockPubScreen()
  50
  51     INTERNALS
  52
  53 *****************************************************************************/
  54 {
  55     AROS_LIBFUNC_INIT
  56
  57     struct List *publist;
  58
  59     DEBUG_UNLOCKPUBSCREEN(dprintf("UnlockPubScreen: name <%s> screen %p\n",
  60                                   name ? (const char *)name : "NULL", screen));
  61     DEBUG_UNLOCKPUBSCREEN(dprintf("LockPubScreen: task %p <%s>\n",
  62                                   SysBase->ThisTask,
  63                                   SysBase->ThisTask->tc_Node.ln_Name ? SysBase->ThisTask->tc_Node.ln_Name : "NULL"));
  64
  65     publist = LockPubScreenList();
  66
  67     if (name != NULL)
  68     {
  69         struct PubScreenNode *psn;
  70
  71         /* Get screen by its name */
  72         if ((psn = findcasename(publist, name)))
  73             screen = psn->psn_Screen;
  74         else
  75             screen = NULL;
  76
  77         DEBUG_UNLOCKPUBSCREEN(dprintf("UnlockPubScreen: found screen %p\n",
  78                                       screen));
  79     }
  80
  81     if (screen != NULL)
  82     {
  83         struct PubScreenNode *ps = GetPrivScreen(screen)->pubScrNode;
  84
  85         //ASSERT(GetPrivScreen(screen)->pubScrNode != NULL);
  86         //ASSERT(GetPrivScreen(screen)->pubScrNode->psn_VisitorCount > 0);
  87
  88         /* Unlock screen */
  89         ps->psn_VisitorCount--;
  90
  91         DEBUG_VISITOR(dprintf("UnlockPubScreen: count %d <%s>\n",
  92                               ps->psn_VisitorCount,
  93                               FindTask(NULL)->tc_Node.ln_Name));
  94
  95
  96         DEBUG_UNLOCKPUBSCREEN(dprintf("UnlockPubScreen: count %d\n",
  97                                       ps->psn_VisitorCount));
  98
  99         /* Notify screen owner if this is (was) the last window on the
 100            screen */
 101         if(ps->psn_VisitorCount == 0)
 102         {
 103             if(ps->psn_SigTask != NULL)
 104                 Signal(ps->psn_SigTask, 1 << ps->psn_SigBit);
 105         }
 106
 107     }
 108
 109     UnlockPubScreenList();
 110
 111     FireScreenNotifyMessage((IPTR) name, SNOTIFY_UNLOCKPUBSCREEN, IntuitionBase);
 112
 113     AROS_LIBFUNC_EXIT
 114 } /* UnlockPubScreen */
 115
 116
 117 /* case insensitive FindName() */
 118 static struct PubScreenNode *findcasename(struct List *list, const UBYTE *name)
 119 {
 120     struct Node *node;
 121
 122     for (node = GetHead(list); node; node = GetSucc(node))
 123     {
 124         if(node->ln_Name)
 125         {
 126             if (!strcasecmp (node->ln_Name, name))
 127                 break;
 128         }
 129     }
 130     return (struct PubScreenNode *)node;
 131 }