4 * Copyright 1995 Alexandre Julliard
12 #include "wine/winbase16.h"
24 #include "selectors.h"
25 #include "stackframe.h"
32 #include "debugtools.h"
37 DEFAULT_DEBUG_CHANNEL(task
);
38 DECLARE_DEBUG_CHANNEL(relay
);
39 DECLARE_DEBUG_CHANNEL(toolhelp
);
41 /* Min. number of thunks allocated when creating a new segment */
45 static THHOOK DefaultThhook
= { 0 };
46 THHOOK
*pThhook
= &DefaultThhook
;
48 #define hCurrentTask (pThhook->CurTDB)
49 #define hFirstTask (pThhook->HeadTDB)
50 #define hLockedTask (pThhook->LockTDB)
52 static UINT16 nTaskCount
= 0;
54 static HTASK initial_task
;
56 /***********************************************************************
59 void TASK_InstallTHHook( THHOOK
*pNewThhook
)
61 THHOOK
*pOldThhook
= pThhook
;
63 pThhook
= pNewThhook
? pNewThhook
: &DefaultThhook
;
65 *pThhook
= *pOldThhook
;
68 /***********************************************************************
71 HTASK16
TASK_GetNextTask( HTASK16 hTask
)
73 TDB
* pTask
= (TDB
*)GlobalLock16(hTask
);
75 if (pTask
->hNext
) return pTask
->hNext
;
76 return (hFirstTask
!= hTask
) ? hFirstTask
: 0;
79 /***********************************************************************
82 static void TASK_LinkTask( HTASK16 hTask
)
87 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return;
88 prevTask
= &hFirstTask
;
91 TDB
*prevTaskPtr
= (TDB
*)GlobalLock16( *prevTask
);
92 if (prevTaskPtr
->priority
>= pTask
->priority
) break;
93 prevTask
= &prevTaskPtr
->hNext
;
95 pTask
->hNext
= *prevTask
;
101 /***********************************************************************
104 static void TASK_UnlinkTask( HTASK16 hTask
)
109 prevTask
= &hFirstTask
;
110 while (*prevTask
&& (*prevTask
!= hTask
))
112 pTask
= (TDB
*)GlobalLock16( *prevTask
);
113 prevTask
= &pTask
->hNext
;
117 pTask
= (TDB
*)GlobalLock16( *prevTask
);
118 *prevTask
= pTask
->hNext
;
125 /***********************************************************************
128 * Create a thunk free-list in segment 'handle', starting from offset 'offset'
129 * and containing 'count' entries.
131 static void TASK_CreateThunks( HGLOBAL16 handle
, WORD offset
, WORD count
)
137 pThunk
= (THUNKS
*)((BYTE
*)GlobalLock16( handle
) + offset
);
139 pThunk
->magic
= THUNK_MAGIC
;
140 pThunk
->free
= (int)&pThunk
->thunks
- (int)pThunk
;
142 for (i
= 0; i
< count
-1; i
++)
144 free
+= 8; /* Offset of next thunk */
145 pThunk
->thunks
[4*i
] = free
;
147 pThunk
->thunks
[4*i
] = 0; /* Last thunk */
151 /***********************************************************************
154 * Allocate a thunk for MakeProcInstance().
156 static SEGPTR
TASK_AllocThunk( HTASK16 hTask
)
162 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return 0;
163 sel
= pTask
->hCSAlias
;
164 pThunk
= &pTask
->thunks
;
165 base
= (int)pThunk
- (int)pTask
;
166 while (!pThunk
->free
)
169 if (!sel
) /* Allocate a new segment */
171 sel
= GLOBAL_Alloc( GMEM_FIXED
, sizeof(THUNKS
) + (MIN_THUNKS
-1)*8,
172 pTask
->hPDB
, TRUE
, FALSE
, FALSE
);
173 if (!sel
) return (SEGPTR
)0;
174 TASK_CreateThunks( sel
, 0, MIN_THUNKS
);
177 pThunk
= (THUNKS
*)GlobalLock16( sel
);
180 base
+= pThunk
->free
;
181 pThunk
->free
= *(WORD
*)((BYTE
*)pThunk
+ pThunk
->free
);
182 return PTR_SEG_OFF_TO_SEGPTR( sel
, base
);
186 /***********************************************************************
189 * Free a MakeProcInstance() thunk.
191 static BOOL
TASK_FreeThunk( HTASK16 hTask
, SEGPTR thunk
)
197 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return 0;
198 sel
= pTask
->hCSAlias
;
199 pThunk
= &pTask
->thunks
;
200 base
= (int)pThunk
- (int)pTask
;
201 while (sel
&& (sel
!= HIWORD(thunk
)))
204 pThunk
= (THUNKS
*)GlobalLock16( sel
);
207 if (!sel
) return FALSE
;
208 *(WORD
*)((BYTE
*)pThunk
+ LOWORD(thunk
) - base
) = pThunk
->free
;
209 pThunk
->free
= LOWORD(thunk
) - base
;
214 /***********************************************************************
217 * NOTE: This routine might be called by a Win32 thread. Thus, we need
218 * to be careful to protect global data structures. We do this
219 * by entering the Win16Lock while linking the task into the
222 BOOL
TASK_Create( NE_MODULE
*pModule
, UINT16 cmdShow
, TEB
*teb
, LPCSTR cmdline
, BYTE len
)
228 /* Allocate the task structure */
230 hTask
= GLOBAL_Alloc( GMEM_FIXED
| GMEM_ZEROINIT
, sizeof(TDB
),
231 pModule
->self
, FALSE
, FALSE
, FALSE
);
232 if (!hTask
) return FALSE
;
233 pTask
= (TDB
*)GlobalLock16( hTask
);
235 /* Fill the task structure */
237 pTask
->hSelf
= hTask
;
239 if (teb
->tibflags
& TEBF_WIN32
)
241 pTask
->flags
|= TDBF_WIN32
;
242 pTask
->hInstance
= pModule
->self
;
243 pTask
->hPrevInstance
= 0;
244 /* NOTE: for 16-bit tasks, the instance handles are updated later on
248 pTask
->version
= pModule
->expected_version
;
249 pTask
->hModule
= pModule
->self
;
250 pTask
->hParent
= GetCurrentTask();
251 pTask
->magic
= TDB_MAGIC
;
252 pTask
->nCmdShow
= cmdShow
;
254 pTask
->curdrive
= DRIVE_GetCurrentDrive() | 0x80;
255 strcpy( pTask
->curdir
, "\\" );
256 lstrcpynA( pTask
->curdir
+ 1, DRIVE_GetDosCwd( DRIVE_GetCurrentDrive() ),
257 sizeof(pTask
->curdir
) - 1 );
259 /* Create the thunks block */
261 TASK_CreateThunks( hTask
, (int)&pTask
->thunks
- (int)pTask
, 7 );
263 /* Copy the module name */
265 GetModuleName16( pModule
->self
, name
, sizeof(name
) );
266 strncpy( pTask
->module_name
, name
, sizeof(pTask
->module_name
) );
268 /* Allocate a selector for the PDB */
270 pTask
->hPDB
= GLOBAL_CreateBlock( GMEM_FIXED
, &pTask
->pdb
, sizeof(PDB16
),
271 pModule
->self
, FALSE
, FALSE
, FALSE
);
275 pTask
->pdb
.int20
= 0x20cd;
276 pTask
->pdb
.dispatcher
[0] = 0x9a; /* ljmp */
277 PUT_DWORD(&pTask
->pdb
.dispatcher
[1], (DWORD
)NE_GetEntryPoint(
278 GetModuleHandle16("KERNEL"), 102 )); /* KERNEL.102 is DOS3Call() */
279 pTask
->pdb
.savedint22
= INT_GetPMHandler( 0x22 );
280 pTask
->pdb
.savedint23
= INT_GetPMHandler( 0x23 );
281 pTask
->pdb
.savedint24
= INT_GetPMHandler( 0x24 );
282 pTask
->pdb
.fileHandlesPtr
=
283 PTR_SEG_OFF_TO_SEGPTR( GlobalHandleToSel16(pTask
->hPDB
),
284 (int)&((PDB16
*)0)->fileHandles
);
285 pTask
->pdb
.hFileHandles
= 0;
286 memset( pTask
->pdb
.fileHandles
, 0xff, sizeof(pTask
->pdb
.fileHandles
) );
287 pTask
->pdb
.environment
= current_envdb
.env_sel
;
288 pTask
->pdb
.nbFiles
= 20;
290 /* Fill the command line */
294 cmdline
= current_envdb
.cmd_line
;
295 /* remove the first word (program name) */
297 if (!(cmdline
= strchr( cmdline
+1, '"' ))) cmdline
= current_envdb
.cmd_line
;
298 while (*cmdline
&& (*cmdline
!= ' ') && (*cmdline
!= '\t')) cmdline
++;
299 while ((*cmdline
== ' ') || (*cmdline
== '\t')) cmdline
++;
300 len
= strlen(cmdline
);
302 if (len
>= sizeof(pTask
->pdb
.cmdLine
)) len
= sizeof(pTask
->pdb
.cmdLine
)-1;
303 pTask
->pdb
.cmdLine
[0] = len
;
304 memcpy( pTask
->pdb
.cmdLine
+ 1, cmdline
, len
);
305 /* pTask->pdb.cmdLine[len+1] = 0; */
307 TRACE("module='%s' cmdline='%.*s' task=%04x\n", name
, len
, cmdline
, hTask
);
309 /* Get the compatibility flags */
311 pTask
->compat_flags
= GetProfileIntA( "Compatibility", name
, 0 );
313 /* Allocate a code segment alias for the TDB */
315 pTask
->hCSAlias
= GLOBAL_CreateBlock( GMEM_FIXED
, (void *)pTask
,
316 sizeof(TDB
), pTask
->hPDB
, TRUE
,
319 /* Set the owner of the environment block */
321 FarSetOwner16( pTask
->pdb
.environment
, pTask
->hPDB
);
323 /* Default DTA overwrites command line */
325 pTask
->dta
= PTR_SEG_OFF_TO_SEGPTR( pTask
->hPDB
,
326 (int)&pTask
->pdb
.cmdLine
- (int)&pTask
->pdb
);
328 /* Create scheduler event for 16-bit tasks */
330 if ( !(pTask
->flags
& TDBF_WIN32
) )
331 NtCreateEvent( &pTask
->hEvent
, EVENT_ALL_ACCESS
, NULL
, TRUE
, FALSE
);
333 /* Enter task handle into thread and process */
335 teb
->htask16
= hTask
;
336 if (!initial_task
) initial_task
= hTask
;
338 /* Add the task to the linked list */
340 SYSLEVEL_EnterWin16Lock();
341 TASK_LinkTask( hTask
);
342 SYSLEVEL_LeaveWin16Lock();
347 /***********************************************************************
350 static void TASK_DeleteTask( HTASK16 hTask
)
355 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return;
358 pTask
->magic
= 0xdead; /* invalidate signature */
360 /* Free the selector aliases */
362 GLOBAL_FreeBlock( pTask
->hCSAlias
);
363 GLOBAL_FreeBlock( pTask
->hPDB
);
365 /* Free the task module */
367 FreeModule16( pTask
->hModule
);
369 /* Free the task structure itself */
371 GlobalFree16( hTask
);
373 /* Free all memory used by this task (including the 32-bit stack, */
374 /* the environment block and the thunk segments). */
376 GlobalFreeAll16( hPDB
);
379 /***********************************************************************
382 void TASK_KillTask( HTASK16 hTask
)
386 /* Enter the Win16Lock to protect global data structures */
387 SYSLEVEL_EnterWin16Lock();
389 if ( !hTask
) hTask
= GetCurrentTask();
390 pTask
= (TDB
*)GlobalLock16( hTask
);
393 SYSLEVEL_LeaveWin16Lock();
397 TRACE("Killing task %04x\n", hTask
);
399 /* Perform USER cleanup */
401 TASK_CallTaskSignalProc( USIG16_TERMINATION
, hTask
);
402 PROCESS_CallUserSignalProc( USIG_PROCESS_EXIT
, 0 );
403 PROCESS_CallUserSignalProc( USIG_THREAD_EXIT
, 0 );
404 PROCESS_CallUserSignalProc( USIG_PROCESS_DESTROY
, 0 );
408 TRACE("this is the last task, exiting\n" );
412 /* FIXME: Hack! Send a message to the initial task so that
413 * the GetMessage wakes up and the initial task can check whether
414 * it is the only remaining one and terminate itself ...
415 * The initial task should probably install hooks or something
416 * to get informed about task termination :-/
418 Callout
.PostAppMessage16( initial_task
, WM_NULL
, 0, 0 );
420 /* Remove the task from the list to be sure we never switch back to it */
421 TASK_UnlinkTask( hTask
);
424 TDB
* p
= (TDB
*)GlobalLock16( hFirstTask
);
427 if( p
->hYieldTo
== hTask
) p
->hYieldTo
= 0;
428 p
= (TDB
*)GlobalLock16( p
->hNext
);
434 if ( hLockedTask
== hTask
)
437 TASK_DeleteTask( hTask
);
439 /* When deleting the current task ... */
440 if ( hTask
== hCurrentTask
)
444 /* ... schedule another one ... */
447 /* ... and completely release the Win16Lock, just in case. */
448 ReleaseThunkLock( &lockCount
);
453 SYSLEVEL_LeaveWin16Lock();
456 /***********************************************************************
459 * This is where all the magic of task-switching happens!
461 * 16-bit Windows performs non-preemptive (cooperative) multitasking.
462 * This means that each 16-bit task runs until it voluntarily yields
463 * control, at which point the scheduler gets active and selects the
466 * In Wine, all processes, even 16-bit ones, are scheduled preemptively
467 * by the standard scheduler of the underlying OS. As many 16-bit apps
468 * *rely* on the behaviour of the Windows scheduler, however, we have
469 * to simulate that behaviour.
471 * This is achieved as follows: every 16-bit task is at time (except
472 * during task creation and deletion) in one of two states: either it
473 * is the one currently running, then the global variable hCurrentTask
474 * contains its task handle, or it is not currently running, then it
475 * is blocked on a special scheduler event, a global handle which
476 * is stored in the task struct.
478 * When the current task yields control, this routine gets called. Its
479 * purpose is to determine the next task to be active, signal the
480 * scheduler event of that task, and then put the current task to sleep
481 * waiting for *its* scheduler event to get signalled again.
483 * This routine can get called in a few other special situations as well:
485 * - On creation of a 16-bit task, the Unix process executing the task
486 * calls TASK_Reschedule once it has completed its initialization.
487 * At this point, the task needs to be blocked until its scheduler
488 * event is signalled the first time (this will be done by the parent
489 * process to get the task up and running).
491 * - When the task currently running terminates itself, this routine gets
492 * called and has to schedule another task, *without* blocking the
495 * - When a 32-bit thread posts an event for a 16-bit task, it might be
496 * the case that *no* 16-bit task is currently running. In this case
497 * the task that has now an event pending is to be scheduled.
500 void TASK_Reschedule(void)
502 TDB
*pOldTask
= NULL
, *pNewTask
= NULL
;
503 HTASK16 hOldTask
= 0, hNewTask
= 0;
504 enum { MODE_YIELD
, MODE_SLEEP
, MODE_WAKEUP
} mode
;
507 SYSLEVEL_EnterWin16Lock();
509 /* Check what we need to do */
510 hOldTask
= GetCurrentTask();
511 pOldTask
= (TDB
*)GlobalLock16( hOldTask
);
512 TRACE( "entered with hCurrentTask %04x by hTask %04x (pid %ld)\n",
513 hCurrentTask
, hOldTask
, (long) getpid() );
515 if ( pOldTask
&& THREAD_IsWin16( NtCurrentTeb() ) )
517 /* We are called by an active (non-deleted) 16-bit task */
519 /* If we don't even have a current task, or else the current
520 task has yielded, we'll need to schedule a new task and
521 (possibly) put the calling task to sleep. Otherwise, we
522 only block the caller. */
524 if ( !hCurrentTask
|| hCurrentTask
== hOldTask
)
531 /* We are called by a deleted 16-bit task or a 32-bit thread */
533 /* The only situation where we need to do something is if we
534 now do not have a current task. Then, we'll need to wake up
535 some task that has events pending. */
537 if ( !hCurrentTask
|| hCurrentTask
== hOldTask
)
542 SYSLEVEL_LeaveWin16Lock();
547 /* Find a task to yield to: check for DirectedYield() */
548 if ( mode
== MODE_YIELD
&& pOldTask
&& pOldTask
->hYieldTo
)
550 hNewTask
= pOldTask
->hYieldTo
;
551 pNewTask
= (TDB
*)GlobalLock16( hNewTask
);
552 if( !pNewTask
|| !pNewTask
->nEvents
) hNewTask
= 0;
553 pOldTask
->hYieldTo
= 0;
556 /* Find a task to yield to: check for pending events */
557 if ( (mode
== MODE_YIELD
|| mode
== MODE_WAKEUP
) && !hNewTask
)
559 hNewTask
= hFirstTask
;
562 pNewTask
= (TDB
*)GlobalLock16( hNewTask
);
564 TRACE( "\ttask = %04x, events = %i\n", hNewTask
, pNewTask
->nEvents
);
566 if (pNewTask
->nEvents
) break;
567 hNewTask
= pNewTask
->hNext
;
569 if (hLockedTask
&& (hNewTask
!= hLockedTask
)) hNewTask
= 0;
572 /* If we are still the task with highest priority, just return ... */
573 if ( mode
== MODE_YIELD
&& hNewTask
&& hNewTask
== hCurrentTask
)
575 TRACE("returning to the current task (%04x)\n", hCurrentTask
);
576 SYSLEVEL_LeaveWin16Lock();
578 /* Allow Win32 threads to thunk down even while a Win16 task is
579 in a tight PeekMessage() or Yield() loop ... */
580 ReleaseThunkLock( &lockCount
);
581 RestoreThunkLock( lockCount
);
585 /* If no task to yield to found, suspend 16-bit scheduler ... */
586 if ( mode
== MODE_YIELD
&& !hNewTask
)
588 TRACE("No currently active task\n");
592 /* If we found a task to wake up, do it ... */
593 if ( (mode
== MODE_YIELD
|| mode
== MODE_WAKEUP
) && hNewTask
)
595 TRACE("Switching to task %04x (%.8s)\n",
596 hNewTask
, pNewTask
->module_name
);
598 pNewTask
->priority
++;
599 TASK_UnlinkTask( hNewTask
);
600 TASK_LinkTask( hNewTask
);
601 pNewTask
->priority
--;
603 hCurrentTask
= hNewTask
;
604 NtSetEvent( pNewTask
->hEvent
, NULL
);
606 /* This is set just in case some app reads it ... */
607 pNewTask
->ss_sp
= pNewTask
->teb
->cur_stack
;
610 /* If we need to put the current task to sleep, do it ... */
611 if ( (mode
== MODE_YIELD
|| mode
== MODE_SLEEP
) && hOldTask
!= hCurrentTask
)
613 NtResetEvent( pOldTask
->hEvent
, NULL
);
615 ReleaseThunkLock( &lockCount
);
616 SYSLEVEL_CheckNotLevel( 1 );
617 WaitForSingleObject( pOldTask
->hEvent
, INFINITE
);
618 RestoreThunkLock( lockCount
);
621 SYSLEVEL_LeaveWin16Lock();
624 /***********************************************************************
625 * InitTask (KERNEL.91)
627 * Called by the application startup code.
629 void WINAPI
InitTask16( CONTEXT86
*context
)
632 INSTANCEDATA
*pinstance
;
636 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return;
638 /* Note: we need to trust that BX/CX contain the stack/heap sizes,
639 as some apps, notably Visual Basic apps, *modify* the heap/stack
640 size of the instance data segment before calling InitTask() */
642 /* Initialize the INSTANCEDATA structure */
643 pinstance
= (INSTANCEDATA
*)PTR_SEG_OFF_TO_LIN(CURRENT_DS
, 0);
644 pinstance
->stackmin
= OFFSETOF( pTask
->teb
->cur_stack
) + sizeof( STACK16FRAME
);
645 pinstance
->stackbottom
= pinstance
->stackmin
; /* yup, that's right. Confused me too. */
646 pinstance
->stacktop
= ( pinstance
->stackmin
> LOWORD(context
->Ebx
) ?
647 pinstance
->stackmin
- LOWORD(context
->Ebx
) : 0 ) + 150;
649 /* Initialize the local heap */
650 if (LOWORD(context
->Ecx
))
651 LocalInit16( GlobalHandleToSel16(pTask
->hInstance
), 0, LOWORD(context
->Ecx
) );
653 /* Initialize implicitly loaded DLLs */
654 NE_InitializeDLLs( pTask
->hModule
);
655 NE_DllProcessAttach( pTask
->hModule
);
657 /* Registers on return are:
658 * ax 1 if OK, 0 on error
659 * cx stack limit in bytes
660 * dx cmdShow parameter
661 * si instance handle of the previous instance
662 * di instance handle of the new task
663 * es:bx pointer to command line inside PSP
665 * 0 (=%bp) is pushed on the stack
667 ptr
= stack16_push( sizeof(WORD
) );
668 *(WORD
*)PTR_SEG_TO_LIN(ptr
) = 0;
673 if (!pTask
->pdb
.cmdLine
[0]) context
->Ebx
= 0x80;
676 LPBYTE p
= &pTask
->pdb
.cmdLine
[1];
677 while ((*p
== ' ') || (*p
== '\t')) p
++;
678 context
->Ebx
= 0x80 + (p
- pTask
->pdb
.cmdLine
);
680 context
->Ecx
= pinstance
->stacktop
;
681 context
->Edx
= pTask
->nCmdShow
;
682 context
->Esi
= (DWORD
)pTask
->hPrevInstance
;
683 context
->Edi
= (DWORD
)pTask
->hInstance
;
684 context
->SegEs
= (WORD
)pTask
->hPDB
;
688 /***********************************************************************
689 * WaitEvent (KERNEL.30)
691 BOOL16 WINAPI
WaitEvent16( HTASK16 hTask
)
695 if (!hTask
) hTask
= GetCurrentTask();
696 pTask
= (TDB
*)GlobalLock16( hTask
);
698 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
700 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel
);
704 if (pTask
->nEvents
> 0)
711 /* When we get back here, we have an event */
713 if (pTask
->nEvents
> 0) pTask
->nEvents
--;
718 /***********************************************************************
719 * PostEvent (KERNEL.31)
721 void WINAPI
PostEvent16( HTASK16 hTask
)
725 if (!hTask
) hTask
= GetCurrentTask();
726 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return;
728 if ( !THREAD_IsWin16( pTask
->teb
) )
730 FIXME("called for Win32 thread (%04x)!\n", pTask
->teb
->teb_sel
);
736 /* If we are a 32-bit task, we might need to wake up the 16-bit scheduler */
737 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
742 /***********************************************************************
743 * SetPriority (KERNEL.32)
745 void WINAPI
SetPriority16( HTASK16 hTask
, INT16 delta
)
750 if (!hTask
) hTask
= GetCurrentTask();
751 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return;
752 newpriority
= pTask
->priority
+ delta
;
753 if (newpriority
< -32) newpriority
= -32;
754 else if (newpriority
> 15) newpriority
= 15;
756 pTask
->priority
= newpriority
+ 1;
757 TASK_UnlinkTask( hTask
);
758 TASK_LinkTask( hTask
);
763 /***********************************************************************
764 * LockCurrentTask (KERNEL.33)
766 HTASK16 WINAPI
LockCurrentTask16( BOOL16 bLock
)
768 if (bLock
) hLockedTask
= GetCurrentTask();
769 else hLockedTask
= 0;
774 /***********************************************************************
775 * IsTaskLocked (KERNEL.122)
777 HTASK16 WINAPI
IsTaskLocked16(void)
783 /***********************************************************************
784 * OldYield (KERNEL.117)
786 void WINAPI
OldYield16(void)
788 TDB
*pCurTask
= (TDB
*)GlobalLock16( GetCurrentTask() );
790 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
792 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel
);
796 if (pCurTask
) pCurTask
->nEvents
++; /* Make sure we get back here */
798 if (pCurTask
) pCurTask
->nEvents
--;
801 /***********************************************************************
802 * WIN32_OldYield16 (KERNEL.447)
804 void WINAPI
WIN32_OldYield16(void)
808 ReleaseThunkLock(&count
);
809 RestoreThunkLock(count
);
812 /***********************************************************************
813 * DirectedYield (KERNEL.150)
815 void WINAPI
DirectedYield16( HTASK16 hTask
)
817 TDB
*pCurTask
= (TDB
*)GlobalLock16( GetCurrentTask() );
819 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
821 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel
);
825 TRACE("%04x: DirectedYield(%04x)\n", pCurTask
->hSelf
, hTask
);
827 pCurTask
->hYieldTo
= hTask
;
830 TRACE("%04x: back from DirectedYield(%04x)\n", pCurTask
->hSelf
, hTask
);
833 /***********************************************************************
834 * Yield16 (KERNEL.29)
836 void WINAPI
Yield16(void)
838 TDB
*pCurTask
= (TDB
*)GlobalLock16( GetCurrentTask() );
840 if (pCurTask
) pCurTask
->hYieldTo
= 0;
841 if (pCurTask
&& pCurTask
->hQueue
) Callout
.UserYield16();
845 /***********************************************************************
846 * KERNEL_490 (KERNEL.490)
848 HTASK16 WINAPI
KERNEL_490( HTASK16 someTask
)
850 if ( !someTask
) return 0;
852 FIXME("(%04x): stub\n", someTask
);
856 /***********************************************************************
857 * MakeProcInstance16 (KERNEL.51)
859 FARPROC16 WINAPI
MakeProcInstance16( FARPROC16 func
, HANDLE16 hInstance
)
863 WORD hInstanceSelector
;
865 hInstanceSelector
= GlobalHandleToSel16(hInstance
);
867 TRACE("(%08lx, %04x);\n", (DWORD
)func
, hInstance
);
870 /* Win95 actually protects via SEH, but this is better for debugging */
871 WARN("Ouch ! Called with invalid func 0x%08lx !\n", (DWORD
)func
);
877 if ( (!(hInstance
& 4)) ||
878 ((hInstance
!= 0xffff) && IS_SELECTOR_FREE(hInstance
|7)) )
880 WARN("Invalid hInstance (%04x) passed to MakeProcInstance !\n",
886 if ( (GlobalHandleToSel16(CURRENT_DS
) != hInstanceSelector
)
888 && (hInstance
!= 0xffff) )
890 /* calling MPI with a foreign DSEG is invalid ! */
891 WARN("Problem with hInstance? Got %04x, using %04x instead\n",
892 hInstance
,CURRENT_DS
);
895 /* Always use the DSEG that MPI was entered with.
896 * We used to set hInstance to GetTaskDS16(), but this should be wrong
897 * as CURRENT_DS provides the DSEG value we need.
898 * ("calling" DS, *not* "task" DS !) */
899 hInstanceSelector
= CURRENT_DS
;
900 hInstance
= GlobalHandle16(hInstanceSelector
);
902 /* no thunking for DLLs */
903 if (NE_GetPtr(FarGetOwner16(hInstance
))->flags
& NE_FFLAGS_LIBMODULE
)
906 thunkaddr
= TASK_AllocThunk( GetCurrentTask() );
907 if (!thunkaddr
) return (FARPROC16
)0;
908 thunk
= PTR_SEG_TO_LIN( thunkaddr
);
909 lfunc
= PTR_SEG_TO_LIN( func
);
911 TRACE("(%08lx,%04x): got thunk %08lx\n",
912 (DWORD
)func
, hInstance
, (DWORD
)thunkaddr
);
913 if (((lfunc
[0]==0x8c) && (lfunc
[1]==0xd8)) || /* movw %ds, %ax */
914 ((lfunc
[0]==0x1e) && (lfunc
[1]==0x58)) /* pushw %ds, popw %ax */
916 WARN("This was the (in)famous \"thunk useless\" warning. We thought we have to overwrite with nop;nop;, but this isn't true.\n");
919 *thunk
++ = 0xb8; /* movw instance, %ax */
920 *thunk
++ = (BYTE
)(hInstanceSelector
& 0xff);
921 *thunk
++ = (BYTE
)(hInstanceSelector
>> 8);
922 *thunk
++ = 0xea; /* ljmp func */
923 *(DWORD
*)thunk
= (DWORD
)func
;
924 return (FARPROC16
)thunkaddr
;
925 /* CX reg indicates if thunkaddr != NULL, implement if needed */
929 /***********************************************************************
930 * FreeProcInstance16 (KERNEL.52)
932 void WINAPI
FreeProcInstance16( FARPROC16 func
)
934 TRACE("(%08lx)\n", (DWORD
)func
);
935 TASK_FreeThunk( GetCurrentTask(), (SEGPTR
)func
);
938 /**********************************************************************
939 * TASK_GetCodeSegment
941 * Helper function for GetCodeHandle/GetCodeInfo: Retrieve the module
942 * and logical segment number of a given code segment.
944 * 'proc' either *is* already a pair of module handle and segment number,
945 * in which case there's nothing to do. Otherwise, it is a pointer to
946 * a function, and we need to retrieve the code segment. If the pointer
947 * happens to point to a thunk, we'll retrieve info about the code segment
948 * where the function pointed to by the thunk resides, not the thunk itself.
950 * FIXME: if 'proc' is a SNOOP16 return stub, we should retrieve info about
951 * the function the snoop code will return to ...
954 static BOOL
TASK_GetCodeSegment( FARPROC16 proc
, NE_MODULE
**ppModule
,
955 SEGTABLEENTRY
**ppSeg
, int *pSegNr
)
957 NE_MODULE
*pModule
= NULL
;
958 SEGTABLEENTRY
*pSeg
= NULL
;
961 /* Try pair of module handle / segment number */
962 pModule
= (NE_MODULE
*) GlobalLock16( HIWORD( proc
) );
963 if ( pModule
&& pModule
->magic
== IMAGE_OS2_SIGNATURE
)
965 segNr
= LOWORD( proc
);
966 if ( segNr
&& segNr
<= pModule
->seg_count
)
967 pSeg
= NE_SEG_TABLE( pModule
) + segNr
-1;
970 /* Try thunk or function */
973 BYTE
*thunk
= (BYTE
*)PTR_SEG_TO_LIN( proc
);
976 if ((thunk
[0] == 0xb8) && (thunk
[3] == 0xea))
977 selector
= thunk
[6] + (thunk
[7] << 8);
979 selector
= HIWORD( proc
);
981 pModule
= NE_GetPtr( GlobalHandle16( selector
) );
982 pSeg
= pModule
? NE_SEG_TABLE( pModule
) : NULL
;
985 for ( segNr
= 1; segNr
<= pModule
->seg_count
; segNr
++, pSeg
++ )
986 if ( GlobalHandleToSel16(pSeg
->hSeg
) == selector
)
989 if ( pModule
&& segNr
> pModule
->seg_count
)
993 /* Abort if segment not found */
995 if ( !pModule
|| !pSeg
)
998 /* Return segment data */
1000 if ( ppModule
) *ppModule
= pModule
;
1001 if ( ppSeg
) *ppSeg
= pSeg
;
1002 if ( pSegNr
) *pSegNr
= segNr
;
1007 /**********************************************************************
1008 * GetCodeHandle (KERNEL.93)
1010 HANDLE16 WINAPI
GetCodeHandle16( FARPROC16 proc
)
1012 SEGTABLEENTRY
*pSeg
;
1014 if ( !TASK_GetCodeSegment( proc
, NULL
, &pSeg
, NULL
) )
1020 /**********************************************************************
1021 * GetCodeInfo (KERNEL.104)
1023 BOOL16 WINAPI
GetCodeInfo16( FARPROC16 proc
, SEGINFO
*segInfo
)
1026 SEGTABLEENTRY
*pSeg
;
1029 if ( !TASK_GetCodeSegment( proc
, &pModule
, &pSeg
, &segNr
) )
1032 /* Fill in segment information */
1034 segInfo
->offSegment
= pSeg
->filepos
;
1035 segInfo
->cbSegment
= pSeg
->size
;
1036 segInfo
->flags
= pSeg
->flags
;
1037 segInfo
->cbAlloc
= pSeg
->minsize
;
1038 segInfo
->h
= pSeg
->hSeg
;
1039 segInfo
->alignShift
= pModule
->alignment
;
1041 if ( segNr
== pModule
->dgroup
)
1042 segInfo
->cbAlloc
+= pModule
->heap_size
+ pModule
->stack_size
;
1044 /* Return module handle in %es */
1046 CURRENT_STACK16
->es
= GlobalHandleToSel16( pModule
->self
);
1052 /**********************************************************************
1053 * DefineHandleTable16 (KERNEL.94)
1055 BOOL16 WINAPI
DefineHandleTable16( WORD wOffset
)
1057 FIXME("(%04x): stub ?\n", wOffset
);
1062 /***********************************************************************
1063 * SetTaskQueue (KERNEL.34)
1065 HQUEUE16 WINAPI
SetTaskQueue16( HTASK16 hTask
, HQUEUE16 hQueue
)
1070 if (!hTask
) hTask
= GetCurrentTask();
1071 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return 0;
1073 hPrev
= pTask
->hQueue
;
1074 pTask
->hQueue
= hQueue
;
1080 /***********************************************************************
1081 * GetTaskQueue (KERNEL.35)
1083 HQUEUE16 WINAPI
GetTaskQueue16( HTASK16 hTask
)
1087 if (!hTask
) hTask
= GetCurrentTask();
1088 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return 0;
1089 return pTask
->hQueue
;
1092 /***********************************************************************
1093 * SetThreadQueue (KERNEL.463)
1095 HQUEUE16 WINAPI
SetThreadQueue16( DWORD thread
, HQUEUE16 hQueue
)
1097 TEB
*teb
= thread
? THREAD_IdToTEB( thread
) : NtCurrentTeb();
1098 HQUEUE16 oldQueue
= teb
? teb
->queue
: 0;
1102 teb
->queue
= hQueue
;
1104 if ( GetTaskQueue16( teb
->htask16
) == oldQueue
)
1105 SetTaskQueue16( teb
->htask16
, hQueue
);
1111 /***********************************************************************
1112 * GetThreadQueue (KERNEL.464)
1114 HQUEUE16 WINAPI
GetThreadQueue16( DWORD thread
)
1118 teb
= NtCurrentTeb();
1119 else if ( HIWORD(thread
) )
1120 teb
= THREAD_IdToTEB( thread
);
1121 else if ( IsTask16( (HTASK16
)thread
) )
1122 teb
= ((TDB
*)GlobalLock16( (HANDLE16
)thread
))->teb
;
1124 return (HQUEUE16
)(teb
? teb
->queue
: 0);
1127 /***********************************************************************
1128 * SetFastQueue (KERNEL.624)
1130 VOID WINAPI
SetFastQueue16( DWORD thread
, HANDLE hQueue
)
1134 teb
= NtCurrentTeb();
1135 else if ( HIWORD(thread
) )
1136 teb
= THREAD_IdToTEB( thread
);
1137 else if ( IsTask16( (HTASK16
)thread
) )
1138 teb
= ((TDB
*)GlobalLock16( (HANDLE16
)thread
))->teb
;
1140 if ( teb
) teb
->queue
= (HQUEUE16
) hQueue
;
1143 /***********************************************************************
1144 * GetFastQueue (KERNEL.625)
1146 HANDLE WINAPI
GetFastQueue16( void )
1148 TEB
*teb
= NtCurrentTeb();
1152 Callout
.InitThreadInput16( 0, THREAD_IsWin16(teb
)? 4 : 5 );
1155 FIXME("(): should initialize thread-local queue, expect failure!\n" );
1157 return (HANDLE
)teb
->queue
;
1160 /***********************************************************************
1161 * SwitchStackTo (KERNEL.108)
1163 void WINAPI
SwitchStackTo16( WORD seg
, WORD ptr
, WORD top
)
1166 STACK16FRAME
*oldFrame
, *newFrame
;
1167 INSTANCEDATA
*pData
;
1170 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return;
1171 if (!(pData
= (INSTANCEDATA
*)GlobalLock16( seg
))) return;
1172 TRACE("old=%04x:%04x new=%04x:%04x\n",
1173 SELECTOROF( pTask
->teb
->cur_stack
),
1174 OFFSETOF( pTask
->teb
->cur_stack
), seg
, ptr
);
1176 /* Save the old stack */
1178 oldFrame
= THREAD_STACK16( pTask
->teb
);
1179 /* pop frame + args and push bp */
1180 pData
->old_ss_sp
= pTask
->teb
->cur_stack
+ sizeof(STACK16FRAME
)
1182 *(WORD
*)PTR_SEG_TO_LIN(pData
->old_ss_sp
) = oldFrame
->bp
;
1183 pData
->stacktop
= top
;
1184 pData
->stackmin
= ptr
;
1185 pData
->stackbottom
= ptr
;
1187 /* Switch to the new stack */
1189 /* Note: we need to take the 3 arguments into account; otherwise,
1190 * the stack will underflow upon return from this function.
1192 copySize
= oldFrame
->bp
- OFFSETOF(pData
->old_ss_sp
);
1193 copySize
+= 3 * sizeof(WORD
) + sizeof(STACK16FRAME
);
1194 pTask
->teb
->cur_stack
= PTR_SEG_OFF_TO_SEGPTR( seg
, ptr
- copySize
);
1195 newFrame
= THREAD_STACK16( pTask
->teb
);
1197 /* Copy the stack frame and the local variables to the new stack */
1199 memmove( newFrame
, oldFrame
, copySize
);
1201 *(WORD
*)PTR_SEG_OFF_TO_LIN( seg
, ptr
) = 0; /* clear previous bp */
1205 /***********************************************************************
1206 * SwitchStackBack (KERNEL.109)
1208 void WINAPI
SwitchStackBack16( CONTEXT86
*context
)
1210 STACK16FRAME
*oldFrame
, *newFrame
;
1211 INSTANCEDATA
*pData
;
1213 if (!(pData
= (INSTANCEDATA
*)GlobalLock16(SELECTOROF(NtCurrentTeb()->cur_stack
))))
1215 if (!pData
->old_ss_sp
)
1217 WARN("No previous SwitchStackTo\n" );
1220 TRACE("restoring stack %04x:%04x\n",
1221 SELECTOROF(pData
->old_ss_sp
), OFFSETOF(pData
->old_ss_sp
) );
1223 oldFrame
= CURRENT_STACK16
;
1225 /* Pop bp from the previous stack */
1227 BP_reg(context
) = *(WORD
*)PTR_SEG_TO_LIN(pData
->old_ss_sp
);
1228 pData
->old_ss_sp
+= sizeof(WORD
);
1230 /* Switch back to the old stack */
1232 NtCurrentTeb()->cur_stack
= pData
->old_ss_sp
- sizeof(STACK16FRAME
);
1233 context
->SegSs
= SELECTOROF(pData
->old_ss_sp
);
1234 context
->Esp
= OFFSETOF(pData
->old_ss_sp
) - sizeof(DWORD
); /*ret addr*/
1235 pData
->old_ss_sp
= 0;
1237 /* Build a stack frame for the return */
1239 newFrame
= CURRENT_STACK16
;
1240 newFrame
->frame32
= oldFrame
->frame32
;
1241 newFrame
->module_cs
= oldFrame
->module_cs
;
1242 newFrame
->callfrom_ip
= oldFrame
->callfrom_ip
;
1243 newFrame
->entry_ip
= oldFrame
->entry_ip
;
1247 /***********************************************************************
1248 * GetTaskQueueDS16 (KERNEL.118)
1250 void WINAPI
GetTaskQueueDS16(void)
1252 CURRENT_STACK16
->ds
= GlobalHandleToSel16( GetTaskQueue16(0) );
1256 /***********************************************************************
1257 * GetTaskQueueES16 (KERNEL.119)
1259 void WINAPI
GetTaskQueueES16(void)
1261 CURRENT_STACK16
->es
= GlobalHandleToSel16( GetTaskQueue16(0) );
1265 /***********************************************************************
1266 * GetCurrentTask (KERNEL.36)
1268 HTASK16 WINAPI
GetCurrentTask(void)
1270 return NtCurrentTeb()->htask16
;
1273 DWORD WINAPI
WIN16_GetCurrentTask(void)
1275 /* This is the version used by relay code; the first task is */
1276 /* returned in the high word of the result */
1277 return MAKELONG( GetCurrentTask(), hFirstTask
);
1281 /***********************************************************************
1282 * GetCurrentPDB (KERNEL.37)
1284 * UNDOC: returns PSP of KERNEL in high word
1286 DWORD WINAPI
GetCurrentPDB16(void)
1290 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1291 return MAKELONG(pTask
->hPDB
, 0); /* FIXME */
1295 /***********************************************************************
1296 * GetCurPID16 (KERNEL.157)
1298 DWORD WINAPI
GetCurPID16( DWORD unused
)
1304 /***********************************************************************
1305 * GetInstanceData (KERNEL.54)
1307 INT16 WINAPI
GetInstanceData16( HINSTANCE16 instance
, WORD buffer
, INT16 len
)
1309 char *ptr
= (char *)GlobalLock16( instance
);
1310 if (!ptr
|| !len
) return 0;
1311 if ((int)buffer
+ len
>= 0x10000) len
= 0x10000 - buffer
;
1312 memcpy( (char *)GlobalLock16(CURRENT_DS
) + buffer
, ptr
+ buffer
, len
);
1317 /***********************************************************************
1318 * GetExeVersion (KERNEL.105)
1320 WORD WINAPI
GetExeVersion16(void)
1324 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1325 return pTask
->version
;
1329 /***********************************************************************
1330 * SetErrorMode16 (KERNEL.107)
1332 UINT16 WINAPI
SetErrorMode16( UINT16 mode
)
1335 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1336 pTask
->error_mode
= mode
;
1337 return SetErrorMode( mode
);
1341 /***********************************************************************
1342 * GetDOSEnvironment (KERNEL.131)
1344 SEGPTR WINAPI
GetDOSEnvironment16(void)
1348 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1349 return PTR_SEG_OFF_TO_SEGPTR( pTask
->pdb
.environment
, 0 );
1353 /***********************************************************************
1354 * GetNumTasks (KERNEL.152)
1356 UINT16 WINAPI
GetNumTasks16(void)
1362 /***********************************************************************
1363 * GetTaskDS (KERNEL.155)
1365 * Note: this function apparently returns a DWORD with LOWORD == HIWORD.
1366 * I don't think we need to bother with this.
1368 HINSTANCE16 WINAPI
GetTaskDS16(void)
1372 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1373 return GlobalHandleToSel16(pTask
->hInstance
);
1376 /***********************************************************************
1377 * GetDummyModuleHandleDS (KERNEL.602)
1379 WORD WINAPI
GetDummyModuleHandleDS16(void)
1384 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1385 if (!(pTask
->flags
& TDBF_WIN32
)) return 0;
1386 selector
= GlobalHandleToSel16( pTask
->hModule
);
1387 CURRENT_DS
= selector
;
1391 /***********************************************************************
1392 * IsTask (KERNEL.320)
1394 BOOL16 WINAPI
IsTask16( HTASK16 hTask
)
1398 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return FALSE
;
1399 if (GlobalSize16( hTask
) < sizeof(TDB
)) return FALSE
;
1400 return (pTask
->magic
== TDB_MAGIC
);
1404 /***********************************************************************
1405 * IsWinOldApTask16 (KERNEL.158)
1407 BOOL16 WINAPI
IsWinOldApTask16( HTASK16 hTask
)
1409 /* should return bit 0 of byte 0x48 in PSP */
1413 /***********************************************************************
1414 * SetTaskSignalProc (KERNEL.38)
1416 FARPROC16 WINAPI
SetTaskSignalProc( HTASK16 hTask
, FARPROC16 proc
)
1421 if (!hTask
) hTask
= GetCurrentTask();
1422 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return NULL
;
1423 oldProc
= pTask
->userhandler
;
1424 pTask
->userhandler
= proc
;
1428 /***********************************************************************
1429 * TASK_CallTaskSignalProc
1431 /* ### start build ### */
1432 extern WORD CALLBACK
TASK_CallTo16_word_wwwww(FARPROC16
,WORD
,WORD
,WORD
,WORD
,WORD
);
1433 /* ### stop build ### */
1434 void TASK_CallTaskSignalProc( UINT16 uCode
, HANDLE16 hTaskOrModule
)
1436 TDB
*pTask
= (TDB
*)GlobalLock16( GetCurrentTask() );
1437 if ( !pTask
|| !pTask
->userhandler
) return;
1439 TASK_CallTo16_word_wwwww( pTask
->userhandler
,
1440 hTaskOrModule
, uCode
, 0,
1441 pTask
->hInstance
, pTask
->hQueue
);
1444 /***********************************************************************
1445 * SetSigHandler (KERNEL.140)
1447 WORD WINAPI
SetSigHandler16( FARPROC16 newhandler
, FARPROC16
* oldhandler
,
1448 UINT16
*oldmode
, UINT16 newmode
, UINT16 flag
)
1450 FIXME("(%p,%p,%p,%d,%d), unimplemented.\n",
1451 newhandler
,oldhandler
,oldmode
,newmode
,flag
);
1453 if (flag
!= 1) return 0;
1454 if (!newmode
) newhandler
= NULL
; /* Default handler */
1459 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1460 if (oldmode
) *oldmode
= pTask
->signal_flags
;
1461 pTask
->signal_flags
= newmode
;
1462 if (oldhandler
) *oldhandler
= pTask
->sighandler
;
1463 pTask
->sighandler
= newhandler
;
1469 /***********************************************************************
1470 * GlobalNotify (KERNEL.154)
1472 * Note that GlobalNotify does _not_ return the old NotifyProc
1473 * -- contrary to LocalNotify !!
1475 VOID WINAPI
GlobalNotify16( FARPROC16 proc
)
1479 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return;
1480 pTask
->discardhandler
= proc
;
1484 /***********************************************************************
1485 * GetExePtr (KERNEL.133)
1487 static inline HMODULE16
GetExePtrHelper( HANDLE16 handle
, HTASK16
*hTask
)
1492 /* Check for module handle */
1494 if (!(ptr
= GlobalLock16( handle
))) return 0;
1495 if (((NE_MODULE
*)ptr
)->magic
== IMAGE_OS2_SIGNATURE
) return handle
;
1497 /* Search for this handle inside all tasks */
1499 *hTask
= hFirstTask
;
1502 TDB
*pTask
= (TDB
*)GlobalLock16( *hTask
);
1503 if ((*hTask
== handle
) ||
1504 (pTask
->hInstance
== handle
) ||
1505 (pTask
->hQueue
== handle
) ||
1506 (pTask
->hPDB
== handle
)) return pTask
->hModule
;
1507 *hTask
= pTask
->hNext
;
1510 /* Check the owner for module handle */
1512 owner
= FarGetOwner16( handle
);
1513 if (!(ptr
= GlobalLock16( owner
))) return 0;
1514 if (((NE_MODULE
*)ptr
)->magic
== IMAGE_OS2_SIGNATURE
) return owner
;
1516 /* Search for the owner inside all tasks */
1518 *hTask
= hFirstTask
;
1521 TDB
*pTask
= (TDB
*)GlobalLock16( *hTask
);
1522 if ((*hTask
== owner
) ||
1523 (pTask
->hInstance
== owner
) ||
1524 (pTask
->hQueue
== owner
) ||
1525 (pTask
->hPDB
== owner
)) return pTask
->hModule
;
1526 *hTask
= pTask
->hNext
;
1532 HMODULE16 WINAPI
WIN16_GetExePtr( HANDLE16 handle
)
1535 HMODULE16 hModule
= GetExePtrHelper( handle
, &hTask
);
1536 STACK16FRAME
*frame
= CURRENT_STACK16
;
1537 frame
->ecx
= hModule
;
1538 if (hTask
) frame
->es
= hTask
;
1542 HMODULE16 WINAPI
GetExePtr( HANDLE16 handle
)
1545 return GetExePtrHelper( handle
, &hTask
);
1549 /***********************************************************************
1550 * TaskFirst (TOOLHELP.63)
1552 BOOL16 WINAPI
TaskFirst16( TASKENTRY
*lpte
)
1554 lpte
->hNext
= hFirstTask
;
1555 return TaskNext16( lpte
);
1559 /***********************************************************************
1560 * TaskNext (TOOLHELP.64)
1562 BOOL16 WINAPI
TaskNext16( TASKENTRY
*lpte
)
1565 INSTANCEDATA
*pInstData
;
1567 TRACE_(toolhelp
)("(%p): task=%04x\n", lpte
, lpte
->hNext
);
1568 if (!lpte
->hNext
) return FALSE
;
1570 /* make sure that task and hInstance are valid (skip initial Wine task !) */
1572 pTask
= (TDB
*)GlobalLock16( lpte
->hNext
);
1573 if (!pTask
|| pTask
->magic
!= TDB_MAGIC
) return FALSE
;
1574 if (pTask
->hInstance
)
1576 lpte
->hNext
= pTask
->hNext
;
1578 pInstData
= (INSTANCEDATA
*)PTR_SEG_OFF_TO_LIN( GlobalHandleToSel16(pTask
->hInstance
), 0 );
1579 lpte
->hTask
= lpte
->hNext
;
1580 lpte
->hTaskParent
= pTask
->hParent
;
1581 lpte
->hInst
= pTask
->hInstance
;
1582 lpte
->hModule
= pTask
->hModule
;
1583 lpte
->wSS
= SELECTOROF( pTask
->teb
->cur_stack
);
1584 lpte
->wSP
= OFFSETOF( pTask
->teb
->cur_stack
);
1585 lpte
->wStackTop
= pInstData
->stacktop
;
1586 lpte
->wStackMinimum
= pInstData
->stackmin
;
1587 lpte
->wStackBottom
= pInstData
->stackbottom
;
1588 lpte
->wcEvents
= pTask
->nEvents
;
1589 lpte
->hQueue
= pTask
->hQueue
;
1590 lstrcpynA( lpte
->szModule
, pTask
->module_name
, sizeof(lpte
->szModule
) );
1591 lpte
->wPSPOffset
= 0x100; /*??*/
1592 lpte
->hNext
= pTask
->hNext
;
1597 /***********************************************************************
1598 * TaskFindHandle (TOOLHELP.65)
1600 BOOL16 WINAPI
TaskFindHandle16( TASKENTRY
*lpte
, HTASK16 hTask
)
1602 lpte
->hNext
= hTask
;
1603 return TaskNext16( lpte
);
1607 /***********************************************************************
1608 * GetAppCompatFlags16 (KERNEL.354)
1610 DWORD WINAPI
GetAppCompatFlags16( HTASK16 hTask
)
1612 return GetAppCompatFlags( hTask
);
1616 /***********************************************************************
1617 * GetAppCompatFlags (USER32.206)
1619 DWORD WINAPI
GetAppCompatFlags( HTASK hTask
)
1623 if (!hTask
) hTask
= GetCurrentTask();
1624 if (!(pTask
=(TDB
*)GlobalLock16( (HTASK16
)hTask
))) return 0;
1625 if (GlobalSize16(hTask
) < sizeof(TDB
)) return 0;
1626 return pTask
->compat_flags
;