4 * Copyright 1995 Alexandre Julliard
12 #include "wine/winbase16.h"
23 #include "selectors.h"
24 #include "stackframe.h"
31 #include "debugtools.h"
36 DEFAULT_DEBUG_CHANNEL(task
)
37 DECLARE_DEBUG_CHANNEL(relay
)
38 DECLARE_DEBUG_CHANNEL(toolhelp
)
40 /* Min. number of thunks allocated when creating a new segment */
44 static THHOOK DefaultThhook
= { 0 };
45 THHOOK
*pThhook
= &DefaultThhook
;
47 #define hCurrentTask (pThhook->CurTDB)
48 #define hFirstTask (pThhook->HeadTDB)
49 #define hLockedTask (pThhook->LockTDB)
51 static UINT16 nTaskCount
= 0;
53 static HTASK initial_task
;
55 /***********************************************************************
58 void TASK_InstallTHHook( THHOOK
*pNewThhook
)
60 THHOOK
*pOldThhook
= pThhook
;
62 pThhook
= pNewThhook
? pNewThhook
: &DefaultThhook
;
64 *pThhook
= *pOldThhook
;
67 /***********************************************************************
70 HTASK16
TASK_GetNextTask( HTASK16 hTask
)
72 TDB
* pTask
= (TDB
*)GlobalLock16(hTask
);
74 if (pTask
->hNext
) return pTask
->hNext
;
75 return (hFirstTask
!= hTask
) ? hFirstTask
: 0;
78 /***********************************************************************
81 static void TASK_LinkTask( HTASK16 hTask
)
86 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return;
87 prevTask
= &hFirstTask
;
90 TDB
*prevTaskPtr
= (TDB
*)GlobalLock16( *prevTask
);
91 if (prevTaskPtr
->priority
>= pTask
->priority
) break;
92 prevTask
= &prevTaskPtr
->hNext
;
94 pTask
->hNext
= *prevTask
;
100 /***********************************************************************
103 static void TASK_UnlinkTask( HTASK16 hTask
)
108 prevTask
= &hFirstTask
;
109 while (*prevTask
&& (*prevTask
!= hTask
))
111 pTask
= (TDB
*)GlobalLock16( *prevTask
);
112 prevTask
= &pTask
->hNext
;
116 pTask
= (TDB
*)GlobalLock16( *prevTask
);
117 *prevTask
= pTask
->hNext
;
124 /***********************************************************************
127 * Create a thunk free-list in segment 'handle', starting from offset 'offset'
128 * and containing 'count' entries.
130 static void TASK_CreateThunks( HGLOBAL16 handle
, WORD offset
, WORD count
)
136 pThunk
= (THUNKS
*)((BYTE
*)GlobalLock16( handle
) + offset
);
138 pThunk
->magic
= THUNK_MAGIC
;
139 pThunk
->free
= (int)&pThunk
->thunks
- (int)pThunk
;
141 for (i
= 0; i
< count
-1; i
++)
143 free
+= 8; /* Offset of next thunk */
144 pThunk
->thunks
[4*i
] = free
;
146 pThunk
->thunks
[4*i
] = 0; /* Last thunk */
150 /***********************************************************************
153 * Allocate a thunk for MakeProcInstance().
155 static SEGPTR
TASK_AllocThunk( HTASK16 hTask
)
161 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return 0;
162 sel
= pTask
->hCSAlias
;
163 pThunk
= &pTask
->thunks
;
164 base
= (int)pThunk
- (int)pTask
;
165 while (!pThunk
->free
)
168 if (!sel
) /* Allocate a new segment */
170 sel
= GLOBAL_Alloc( GMEM_FIXED
, sizeof(THUNKS
) + (MIN_THUNKS
-1)*8,
171 pTask
->hPDB
, TRUE
, FALSE
, FALSE
);
172 if (!sel
) return (SEGPTR
)0;
173 TASK_CreateThunks( sel
, 0, MIN_THUNKS
);
176 pThunk
= (THUNKS
*)GlobalLock16( sel
);
179 base
+= pThunk
->free
;
180 pThunk
->free
= *(WORD
*)((BYTE
*)pThunk
+ pThunk
->free
);
181 return PTR_SEG_OFF_TO_SEGPTR( sel
, base
);
185 /***********************************************************************
188 * Free a MakeProcInstance() thunk.
190 static BOOL
TASK_FreeThunk( HTASK16 hTask
, SEGPTR thunk
)
196 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return 0;
197 sel
= pTask
->hCSAlias
;
198 pThunk
= &pTask
->thunks
;
199 base
= (int)pThunk
- (int)pTask
;
200 while (sel
&& (sel
!= HIWORD(thunk
)))
203 pThunk
= (THUNKS
*)GlobalLock16( sel
);
206 if (!sel
) return FALSE
;
207 *(WORD
*)((BYTE
*)pThunk
+ LOWORD(thunk
) - base
) = pThunk
->free
;
208 pThunk
->free
= LOWORD(thunk
) - base
;
213 /***********************************************************************
216 * NOTE: This routine might be called by a Win32 thread. Thus, we need
217 * to be careful to protect global data structures. We do this
218 * by entering the Win16Lock while linking the task into the
221 BOOL
TASK_Create( NE_MODULE
*pModule
, UINT16 cmdShow
, TEB
*teb
, LPCSTR cmdline
, BYTE len
)
227 /* Allocate the task structure */
229 hTask
= GLOBAL_Alloc( GMEM_FIXED
| GMEM_ZEROINIT
, sizeof(TDB
),
230 pModule
->self
, FALSE
, FALSE
, FALSE
);
231 if (!hTask
) return FALSE
;
232 pTask
= (TDB
*)GlobalLock16( hTask
);
234 /* Fill the task structure */
236 pTask
->hSelf
= hTask
;
238 if (teb
->tibflags
& TEBF_WIN32
)
240 pTask
->flags
|= TDBF_WIN32
;
241 pTask
->hInstance
= pModule
->self
;
242 pTask
->hPrevInstance
= 0;
243 /* NOTE: for 16-bit tasks, the instance handles are updated later on
246 if (MZ_Current() && MZ_Current()->load_seg
) pTask
->flags
|= TDBF_WINOLDAP
;
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
) )
332 pTask
->hEvent
= CreateEventA( NULL
, TRUE
, FALSE
, NULL
);
333 pTask
->hEvent
= ConvertToGlobalHandle( pTask
->hEvent
);
336 /* Enter task handle into thread and process */
338 teb
->htask16
= hTask
;
339 if (!initial_task
) initial_task
= hTask
;
341 /* Add the task to the linked list */
343 SYSLEVEL_EnterWin16Lock();
344 TASK_LinkTask( hTask
);
345 SYSLEVEL_LeaveWin16Lock();
350 /***********************************************************************
353 static void TASK_DeleteTask( HTASK16 hTask
)
358 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return;
361 pTask
->magic
= 0xdead; /* invalidate signature */
363 /* Free the selector aliases */
365 GLOBAL_FreeBlock( pTask
->hCSAlias
);
366 GLOBAL_FreeBlock( pTask
->hPDB
);
368 /* Free the task module */
370 FreeModule16( pTask
->hModule
);
372 /* Free the task structure itself */
374 GlobalFree16( hTask
);
376 /* Free all memory used by this task (including the 32-bit stack, */
377 /* the environment block and the thunk segments). */
379 GlobalFreeAll16( hPDB
);
382 /***********************************************************************
385 void TASK_KillTask( HTASK16 hTask
)
389 /* Enter the Win16Lock to protect global data structures */
390 SYSLEVEL_EnterWin16Lock();
392 if ( !hTask
) hTask
= GetCurrentTask();
393 pTask
= (TDB
*)GlobalLock16( hTask
);
396 SYSLEVEL_LeaveWin16Lock();
400 TRACE("Killing task %04x\n", hTask
);
402 /* Perform USER cleanup */
404 TASK_CallTaskSignalProc( USIG16_TERMINATION
, hTask
);
405 PROCESS_CallUserSignalProc( USIG_PROCESS_EXIT
, 0 );
406 PROCESS_CallUserSignalProc( USIG_THREAD_EXIT
, 0 );
407 PROCESS_CallUserSignalProc( USIG_PROCESS_DESTROY
, 0 );
411 TRACE("this is the last task, exiting\n" );
415 /* FIXME: Hack! Send a message to the initial task so that
416 * the GetMessage wakes up and the initial task can check whether
417 * it is the only remaining one and terminate itself ...
418 * The initial task should probably install hooks or something
419 * to get informed about task termination :-/
421 Callout
.PostAppMessage16( initial_task
, WM_NULL
, 0, 0 );
423 /* Remove the task from the list to be sure we never switch back to it */
424 TASK_UnlinkTask( hTask
);
427 TDB
* p
= (TDB
*)GlobalLock16( hFirstTask
);
430 if( p
->hYieldTo
== hTask
) p
->hYieldTo
= 0;
431 p
= (TDB
*)GlobalLock16( p
->hNext
);
437 if ( hLockedTask
== hTask
)
440 TASK_DeleteTask( hTask
);
442 /* When deleting the current task ... */
443 if ( hTask
== hCurrentTask
)
447 /* ... schedule another one ... */
450 /* ... and completely release the Win16Lock, just in case. */
451 ReleaseThunkLock( &lockCount
);
456 SYSLEVEL_LeaveWin16Lock();
459 /***********************************************************************
462 * This is where all the magic of task-switching happens!
464 * 16-bit Windows performs non-preemptive (cooperative) multitasking.
465 * This means that each 16-bit task runs until it voluntarily yields
466 * control, at which point the scheduler gets active and selects the
469 * In Wine, all processes, even 16-bit ones, are scheduled preemptively
470 * by the standard scheduler of the underlying OS. As many 16-bit apps
471 * *rely* on the behaviour of the Windows scheduler, however, we have
472 * to simulate that behaviour.
474 * This is achieved as follows: every 16-bit task is at time (except
475 * during task creation and deletion) in one of two states: either it
476 * is the one currently running, then the global variable hCurrentTask
477 * contains its task handle, or it is not currently running, then it
478 * is blocked on a special scheduler event, a global handle which
479 * is stored in the task struct.
481 * When the current task yields control, this routine gets called. Its
482 * purpose is to determine the next task to be active, signal the
483 * scheduler event of that task, and then put the current task to sleep
484 * waiting for *its* scheduler event to get signalled again.
486 * This routine can get called in a few other special situations as well:
488 * - On creation of a 16-bit task, the Unix process executing the task
489 * calls TASK_Reschedule once it has completed its initialization.
490 * At this point, the task needs to be blocked until its scheduler
491 * event is signalled the first time (this will be done by the parent
492 * process to get the task up and running).
494 * - When the task currently running terminates itself, this routine gets
495 * called and has to schedule another task, *without* blocking the
498 * - When a 32-bit thread posts an event for a 16-bit task, it might be
499 * the case that *no* 16-bit task is currently running. In this case
500 * the task that has now an event pending is to be scheduled.
503 void TASK_Reschedule(void)
505 TDB
*pOldTask
= NULL
, *pNewTask
= NULL
;
506 HTASK16 hOldTask
= 0, hNewTask
= 0;
507 enum { MODE_YIELD
, MODE_SLEEP
, MODE_WAKEUP
} mode
;
510 SYSLEVEL_EnterWin16Lock();
512 /* Check what we need to do */
513 hOldTask
= GetCurrentTask();
514 pOldTask
= (TDB
*)GlobalLock16( hOldTask
);
515 TRACE( "entered with hCurrentTask %04x by hTask %04x (pid %ld)\n",
516 hCurrentTask
, hOldTask
, (long) getpid() );
518 if ( pOldTask
&& THREAD_IsWin16( NtCurrentTeb() ) )
520 /* We are called by an active (non-deleted) 16-bit task */
522 /* If we don't even have a current task, or else the current
523 task has yielded, we'll need to schedule a new task and
524 (possibly) put the calling task to sleep. Otherwise, we
525 only block the caller. */
527 if ( !hCurrentTask
|| hCurrentTask
== hOldTask
)
534 /* We are called by a deleted 16-bit task or a 32-bit thread */
536 /* The only situation where we need to do something is if we
537 now do not have a current task. Then, we'll need to wake up
538 some task that has events pending. */
540 if ( !hCurrentTask
|| hCurrentTask
== hOldTask
)
545 SYSLEVEL_LeaveWin16Lock();
550 /* Find a task to yield to: check for DirectedYield() */
551 if ( mode
== MODE_YIELD
&& pOldTask
&& pOldTask
->hYieldTo
)
553 hNewTask
= pOldTask
->hYieldTo
;
554 pNewTask
= (TDB
*)GlobalLock16( hNewTask
);
555 if( !pNewTask
|| !pNewTask
->nEvents
) hNewTask
= 0;
556 pOldTask
->hYieldTo
= 0;
559 /* Find a task to yield to: check for pending events */
560 if ( (mode
== MODE_YIELD
|| mode
== MODE_WAKEUP
) && !hNewTask
)
562 hNewTask
= hFirstTask
;
565 pNewTask
= (TDB
*)GlobalLock16( hNewTask
);
567 TRACE( "\ttask = %04x, events = %i\n", hNewTask
, pNewTask
->nEvents
);
569 if (pNewTask
->nEvents
) break;
570 hNewTask
= pNewTask
->hNext
;
572 if (hLockedTask
&& (hNewTask
!= hLockedTask
)) hNewTask
= 0;
575 /* If we are still the task with highest priority, just return ... */
576 if ( mode
== MODE_YIELD
&& hNewTask
&& hNewTask
== hCurrentTask
)
578 TRACE("returning to the current task (%04x)\n", hCurrentTask
);
579 SYSLEVEL_LeaveWin16Lock();
581 /* Allow Win32 threads to thunk down even while a Win16 task is
582 in a tight PeekMessage() or Yield() loop ... */
583 ReleaseThunkLock( &lockCount
);
584 RestoreThunkLock( lockCount
);
588 /* If no task to yield to found, suspend 16-bit scheduler ... */
589 if ( mode
== MODE_YIELD
&& !hNewTask
)
591 TRACE("No currently active task\n");
595 /* If we found a task to wake up, do it ... */
596 if ( (mode
== MODE_YIELD
|| mode
== MODE_WAKEUP
) && hNewTask
)
598 TRACE("Switching to task %04x (%.8s)\n",
599 hNewTask
, pNewTask
->module_name
);
601 pNewTask
->priority
++;
602 TASK_UnlinkTask( hNewTask
);
603 TASK_LinkTask( hNewTask
);
604 pNewTask
->priority
--;
606 hCurrentTask
= hNewTask
;
607 SetEvent( pNewTask
->hEvent
);
609 /* This is set just in case some app reads it ... */
610 pNewTask
->ss_sp
= pNewTask
->teb
->cur_stack
;
613 /* If we need to put the current task to sleep, do it ... */
614 if ( (mode
== MODE_YIELD
|| mode
== MODE_SLEEP
) && hOldTask
!= hCurrentTask
)
616 ResetEvent( pOldTask
->hEvent
);
618 ReleaseThunkLock( &lockCount
);
619 SYSLEVEL_CheckNotLevel( 1 );
620 WaitForSingleObject( pOldTask
->hEvent
, INFINITE
);
621 RestoreThunkLock( lockCount
);
624 SYSLEVEL_LeaveWin16Lock();
627 /***********************************************************************
628 * InitTask (KERNEL.91)
630 * Called by the application startup code.
632 void WINAPI
InitTask16( CONTEXT86
*context
)
635 INSTANCEDATA
*pinstance
;
638 EAX_reg(context
) = 0;
639 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return;
641 /* Note: we need to trust that BX/CX contain the stack/heap sizes,
642 as some apps, notably Visual Basic apps, *modify* the heap/stack
643 size of the instance data segment before calling InitTask() */
645 /* Initialize the INSTANCEDATA structure */
646 pinstance
= (INSTANCEDATA
*)PTR_SEG_OFF_TO_LIN(CURRENT_DS
, 0);
647 pinstance
->stackmin
= OFFSETOF( pTask
->teb
->cur_stack
) + sizeof( STACK16FRAME
);
648 pinstance
->stackbottom
= pinstance
->stackmin
; /* yup, that's right. Confused me too. */
649 pinstance
->stacktop
= ( pinstance
->stackmin
> BX_reg(context
)?
650 pinstance
->stackmin
- BX_reg(context
) : 0 ) + 150;
652 /* Initialize the local heap */
653 if ( CX_reg(context
) )
654 LocalInit16( GlobalHandleToSel16(pTask
->hInstance
), 0, CX_reg(context
) );
656 /* Initialize implicitly loaded DLLs */
657 NE_InitializeDLLs( pTask
->hModule
);
658 NE_DllProcessAttach( pTask
->hModule
);
660 /* Registers on return are:
661 * ax 1 if OK, 0 on error
662 * cx stack limit in bytes
663 * dx cmdShow parameter
664 * si instance handle of the previous instance
665 * di instance handle of the new task
666 * es:bx pointer to command line inside PSP
668 * 0 (=%bp) is pushed on the stack
670 ptr
= stack16_push( sizeof(WORD
) );
671 *(WORD
*)PTR_SEG_TO_LIN(ptr
) = 0;
672 ESP_reg(context
) -= 2;
674 EAX_reg(context
) = 1;
676 if (!pTask
->pdb
.cmdLine
[0]) EBX_reg(context
) = 0x80;
679 LPBYTE p
= &pTask
->pdb
.cmdLine
[1];
680 while ((*p
== ' ') || (*p
== '\t')) p
++;
681 EBX_reg(context
) = 0x80 + (p
- pTask
->pdb
.cmdLine
);
683 ECX_reg(context
) = pinstance
->stacktop
;
684 EDX_reg(context
) = pTask
->nCmdShow
;
685 ESI_reg(context
) = (DWORD
)pTask
->hPrevInstance
;
686 EDI_reg(context
) = (DWORD
)pTask
->hInstance
;
687 ES_reg (context
) = (WORD
)pTask
->hPDB
;
691 /***********************************************************************
692 * WaitEvent (KERNEL.30)
694 BOOL16 WINAPI
WaitEvent16( HTASK16 hTask
)
698 if (!hTask
) hTask
= GetCurrentTask();
699 pTask
= (TDB
*)GlobalLock16( hTask
);
701 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
703 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel
);
707 if (pTask
->nEvents
> 0)
714 /* When we get back here, we have an event */
716 if (pTask
->nEvents
> 0) pTask
->nEvents
--;
721 /***********************************************************************
722 * PostEvent (KERNEL.31)
724 void WINAPI
PostEvent16( HTASK16 hTask
)
728 if (!hTask
) hTask
= GetCurrentTask();
729 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return;
731 if ( !THREAD_IsWin16( pTask
->teb
) )
733 FIXME("called for Win32 thread (%04x)!\n", pTask
->teb
->teb_sel
);
739 /* If we are a 32-bit task, we might need to wake up the 16-bit scheduler */
740 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
745 /***********************************************************************
746 * SetPriority (KERNEL.32)
748 void WINAPI
SetPriority16( HTASK16 hTask
, INT16 delta
)
753 if (!hTask
) hTask
= GetCurrentTask();
754 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return;
755 newpriority
= pTask
->priority
+ delta
;
756 if (newpriority
< -32) newpriority
= -32;
757 else if (newpriority
> 15) newpriority
= 15;
759 pTask
->priority
= newpriority
+ 1;
760 TASK_UnlinkTask( hTask
);
761 TASK_LinkTask( hTask
);
766 /***********************************************************************
767 * LockCurrentTask (KERNEL.33)
769 HTASK16 WINAPI
LockCurrentTask16( BOOL16 bLock
)
771 if (bLock
) hLockedTask
= GetCurrentTask();
772 else hLockedTask
= 0;
777 /***********************************************************************
778 * IsTaskLocked (KERNEL.122)
780 HTASK16 WINAPI
IsTaskLocked16(void)
786 /***********************************************************************
787 * OldYield (KERNEL.117)
789 void WINAPI
OldYield16(void)
791 TDB
*pCurTask
= (TDB
*)GlobalLock16( GetCurrentTask() );
793 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
795 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel
);
799 if (pCurTask
) pCurTask
->nEvents
++; /* Make sure we get back here */
801 if (pCurTask
) pCurTask
->nEvents
--;
804 /***********************************************************************
805 * WIN32_OldYield16 (KERNEL.447)
807 void WINAPI
WIN32_OldYield16(void)
811 ReleaseThunkLock(&count
);
812 RestoreThunkLock(count
);
815 /***********************************************************************
816 * DirectedYield (KERNEL.150)
818 void WINAPI
DirectedYield16( HTASK16 hTask
)
820 TDB
*pCurTask
= (TDB
*)GlobalLock16( GetCurrentTask() );
822 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
824 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel
);
828 TRACE("%04x: DirectedYield(%04x)\n", pCurTask
->hSelf
, hTask
);
830 pCurTask
->hYieldTo
= hTask
;
833 TRACE("%04x: back from DirectedYield(%04x)\n", pCurTask
->hSelf
, hTask
);
836 /***********************************************************************
837 * Yield16 (KERNEL.29)
839 void WINAPI
Yield16(void)
841 TDB
*pCurTask
= (TDB
*)GlobalLock16( GetCurrentTask() );
843 if (pCurTask
) pCurTask
->hYieldTo
= 0;
844 if (pCurTask
&& pCurTask
->hQueue
) Callout
.UserYield16();
848 /***********************************************************************
849 * KERNEL_490 (KERNEL.490)
851 HTASK16 WINAPI
KERNEL_490( HTASK16 someTask
)
853 if ( !someTask
) return 0;
855 FIXME("(%04x): stub\n", someTask
);
859 /***********************************************************************
860 * MakeProcInstance16 (KERNEL.51)
862 FARPROC16 WINAPI
MakeProcInstance16( FARPROC16 func
, HANDLE16 hInstance
)
866 WORD hInstanceSelector
;
868 hInstanceSelector
= GlobalHandleToSel16(hInstance
);
870 TRACE("(%08lx, %04x);\n", (DWORD
)func
, hInstance
);
873 /* Win95 actually protects via SEH, but this is better for debugging */
874 WARN("Ouch ! Called with invalid func 0x%08lx !\n", (DWORD
)func
);
880 if ( (!(hInstance
& 4)) ||
881 ((hInstance
!= 0xffff) && IS_SELECTOR_FREE(hInstance
|7)) )
883 WARN("Invalid hInstance (%04x) passed to MakeProcInstance !\n",
889 if ( (GlobalHandleToSel16(CURRENT_DS
) != hInstanceSelector
)
891 && (hInstance
!= 0xffff) )
893 /* calling MPI with a foreign DSEG is invalid ! */
894 WARN("Problem with hInstance? Got %04x, using %04x instead\n",
895 hInstance
,CURRENT_DS
);
898 /* Always use the DSEG that MPI was entered with.
899 * We used to set hInstance to GetTaskDS16(), but this should be wrong
900 * as CURRENT_DS provides the DSEG value we need.
901 * ("calling" DS, *not* "task" DS !) */
902 hInstanceSelector
= CURRENT_DS
;
903 hInstance
= GlobalHandle16(hInstanceSelector
);
905 /* no thunking for DLLs */
906 if (NE_GetPtr(FarGetOwner16(hInstance
))->flags
& NE_FFLAGS_LIBMODULE
)
909 thunkaddr
= TASK_AllocThunk( GetCurrentTask() );
910 if (!thunkaddr
) return (FARPROC16
)0;
911 thunk
= PTR_SEG_TO_LIN( thunkaddr
);
912 lfunc
= PTR_SEG_TO_LIN( func
);
914 TRACE("(%08lx,%04x): got thunk %08lx\n",
915 (DWORD
)func
, hInstance
, (DWORD
)thunkaddr
);
916 if (((lfunc
[0]==0x8c) && (lfunc
[1]==0xd8)) || /* movw %ds, %ax */
917 ((lfunc
[0]==0x1e) && (lfunc
[1]==0x58)) /* pushw %ds, popw %ax */
919 WARN("This was the (in)famous \"thunk useless\" warning. We thought we have to overwrite with nop;nop;, but this isn't true.\n");
922 *thunk
++ = 0xb8; /* movw instance, %ax */
923 *thunk
++ = (BYTE
)(hInstanceSelector
& 0xff);
924 *thunk
++ = (BYTE
)(hInstanceSelector
>> 8);
925 *thunk
++ = 0xea; /* ljmp func */
926 *(DWORD
*)thunk
= (DWORD
)func
;
927 return (FARPROC16
)thunkaddr
;
928 /* CX reg indicates if thunkaddr != NULL, implement if needed */
932 /***********************************************************************
933 * FreeProcInstance16 (KERNEL.52)
935 void WINAPI
FreeProcInstance16( FARPROC16 func
)
937 TRACE("(%08lx)\n", (DWORD
)func
);
938 TASK_FreeThunk( GetCurrentTask(), (SEGPTR
)func
);
941 /**********************************************************************
942 * TASK_GetCodeSegment
944 * Helper function for GetCodeHandle/GetCodeInfo: Retrieve the module
945 * and logical segment number of a given code segment.
947 * 'proc' either *is* already a pair of module handle and segment number,
948 * in which case there's nothing to do. Otherwise, it is a pointer to
949 * a function, and we need to retrieve the code segment. If the pointer
950 * happens to point to a thunk, we'll retrieve info about the code segment
951 * where the function pointed to by the thunk resides, not the thunk itself.
953 * FIXME: if 'proc' is a SNOOP16 return stub, we should retrieve info about
954 * the function the snoop code will return to ...
957 static BOOL
TASK_GetCodeSegment( FARPROC16 proc
, NE_MODULE
**ppModule
,
958 SEGTABLEENTRY
**ppSeg
, int *pSegNr
)
960 NE_MODULE
*pModule
= NULL
;
961 SEGTABLEENTRY
*pSeg
= NULL
;
964 /* Try pair of module handle / segment number */
965 pModule
= (NE_MODULE
*) GlobalLock16( HIWORD( proc
) );
966 if ( pModule
&& pModule
->magic
== IMAGE_OS2_SIGNATURE
)
968 segNr
= LOWORD( proc
);
969 if ( segNr
&& segNr
<= pModule
->seg_count
)
970 pSeg
= NE_SEG_TABLE( pModule
) + segNr
-1;
973 /* Try thunk or function */
976 BYTE
*thunk
= (BYTE
*)PTR_SEG_TO_LIN( proc
);
979 if ((thunk
[0] == 0xb8) && (thunk
[3] == 0xea))
980 selector
= thunk
[6] + (thunk
[7] << 8);
982 selector
= HIWORD( proc
);
984 pModule
= NE_GetPtr( GlobalHandle16( selector
) );
985 pSeg
= pModule
? NE_SEG_TABLE( pModule
) : NULL
;
988 for ( segNr
= 1; segNr
<= pModule
->seg_count
; segNr
++, pSeg
++ )
989 if ( GlobalHandleToSel16(pSeg
->hSeg
) == selector
)
992 if ( pModule
&& segNr
> pModule
->seg_count
)
996 /* Abort if segment not found */
998 if ( !pModule
|| !pSeg
)
1001 /* Return segment data */
1003 if ( ppModule
) *ppModule
= pModule
;
1004 if ( ppSeg
) *ppSeg
= pSeg
;
1005 if ( pSegNr
) *pSegNr
= segNr
;
1010 /**********************************************************************
1011 * GetCodeHandle (KERNEL.93)
1013 HANDLE16 WINAPI
GetCodeHandle16( FARPROC16 proc
)
1015 SEGTABLEENTRY
*pSeg
;
1017 if ( !TASK_GetCodeSegment( proc
, NULL
, &pSeg
, NULL
) )
1023 /**********************************************************************
1024 * GetCodeInfo (KERNEL.104)
1026 BOOL16 WINAPI
GetCodeInfo16( FARPROC16 proc
, SEGINFO
*segInfo
)
1029 SEGTABLEENTRY
*pSeg
;
1032 if ( !TASK_GetCodeSegment( proc
, &pModule
, &pSeg
, &segNr
) )
1035 /* Fill in segment information */
1037 segInfo
->offSegment
= pSeg
->filepos
;
1038 segInfo
->cbSegment
= pSeg
->size
;
1039 segInfo
->flags
= pSeg
->flags
;
1040 segInfo
->cbAlloc
= pSeg
->minsize
;
1041 segInfo
->h
= pSeg
->hSeg
;
1042 segInfo
->alignShift
= pModule
->alignment
;
1044 if ( segNr
== pModule
->dgroup
)
1045 segInfo
->cbAlloc
+= pModule
->heap_size
+ pModule
->stack_size
;
1047 /* Return module handle in %es */
1049 CURRENT_STACK16
->es
= GlobalHandleToSel16( pModule
->self
);
1055 /**********************************************************************
1056 * DefineHandleTable16 (KERNEL.94)
1058 BOOL16 WINAPI
DefineHandleTable16( WORD wOffset
)
1060 FIXME("(%04x): stub ?\n", wOffset
);
1065 /***********************************************************************
1066 * SetTaskQueue (KERNEL.34)
1068 HQUEUE16 WINAPI
SetTaskQueue16( HTASK16 hTask
, HQUEUE16 hQueue
)
1073 if (!hTask
) hTask
= GetCurrentTask();
1074 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return 0;
1076 hPrev
= pTask
->hQueue
;
1077 pTask
->hQueue
= hQueue
;
1083 /***********************************************************************
1084 * GetTaskQueue (KERNEL.35)
1086 HQUEUE16 WINAPI
GetTaskQueue16( HTASK16 hTask
)
1090 if (!hTask
) hTask
= GetCurrentTask();
1091 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return 0;
1092 return pTask
->hQueue
;
1095 /***********************************************************************
1096 * SetThreadQueue (KERNEL.463)
1098 HQUEUE16 WINAPI
SetThreadQueue16( DWORD thread
, HQUEUE16 hQueue
)
1100 TEB
*teb
= thread
? THREAD_IdToTEB( thread
) : NtCurrentTeb();
1101 HQUEUE16 oldQueue
= teb
? teb
->queue
: 0;
1105 teb
->queue
= hQueue
;
1107 if ( GetTaskQueue16( teb
->htask16
) == oldQueue
)
1108 SetTaskQueue16( teb
->htask16
, hQueue
);
1114 /***********************************************************************
1115 * GetThreadQueue (KERNEL.464)
1117 HQUEUE16 WINAPI
GetThreadQueue16( DWORD thread
)
1121 teb
= NtCurrentTeb();
1122 else if ( HIWORD(thread
) )
1123 teb
= THREAD_IdToTEB( thread
);
1124 else if ( IsTask16( (HTASK16
)thread
) )
1125 teb
= ((TDB
*)GlobalLock16( (HANDLE16
)thread
))->teb
;
1127 return (HQUEUE16
)(teb
? teb
->queue
: 0);
1130 /***********************************************************************
1131 * SetFastQueue (KERNEL.624)
1133 VOID WINAPI
SetFastQueue16( DWORD thread
, HANDLE hQueue
)
1137 teb
= NtCurrentTeb();
1138 else if ( HIWORD(thread
) )
1139 teb
= THREAD_IdToTEB( thread
);
1140 else if ( IsTask16( (HTASK16
)thread
) )
1141 teb
= ((TDB
*)GlobalLock16( (HANDLE16
)thread
))->teb
;
1143 if ( teb
) teb
->queue
= (HQUEUE16
) hQueue
;
1146 /***********************************************************************
1147 * GetFastQueue (KERNEL.625)
1149 HANDLE WINAPI
GetFastQueue16( void )
1151 TEB
*teb
= NtCurrentTeb();
1155 Callout
.InitThreadInput16( 0, THREAD_IsWin16(teb
)? 4 : 5 );
1158 FIXME("(): should initialize thread-local queue, expect failure!\n" );
1160 return (HANDLE
)teb
->queue
;
1163 /***********************************************************************
1164 * SwitchStackTo (KERNEL.108)
1166 void WINAPI
SwitchStackTo16( WORD seg
, WORD ptr
, WORD top
)
1169 STACK16FRAME
*oldFrame
, *newFrame
;
1170 INSTANCEDATA
*pData
;
1173 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return;
1174 if (!(pData
= (INSTANCEDATA
*)GlobalLock16( seg
))) return;
1175 TRACE("old=%04x:%04x new=%04x:%04x\n",
1176 SELECTOROF( pTask
->teb
->cur_stack
),
1177 OFFSETOF( pTask
->teb
->cur_stack
), seg
, ptr
);
1179 /* Save the old stack */
1181 oldFrame
= THREAD_STACK16( pTask
->teb
);
1182 /* pop frame + args and push bp */
1183 pData
->old_ss_sp
= pTask
->teb
->cur_stack
+ sizeof(STACK16FRAME
)
1185 *(WORD
*)PTR_SEG_TO_LIN(pData
->old_ss_sp
) = oldFrame
->bp
;
1186 pData
->stacktop
= top
;
1187 pData
->stackmin
= ptr
;
1188 pData
->stackbottom
= ptr
;
1190 /* Switch to the new stack */
1192 /* Note: we need to take the 3 arguments into account; otherwise,
1193 * the stack will underflow upon return from this function.
1195 copySize
= oldFrame
->bp
- OFFSETOF(pData
->old_ss_sp
);
1196 copySize
+= 3 * sizeof(WORD
) + sizeof(STACK16FRAME
);
1197 pTask
->teb
->cur_stack
= PTR_SEG_OFF_TO_SEGPTR( seg
, ptr
- copySize
);
1198 newFrame
= THREAD_STACK16( pTask
->teb
);
1200 /* Copy the stack frame and the local variables to the new stack */
1202 memmove( newFrame
, oldFrame
, copySize
);
1204 *(WORD
*)PTR_SEG_OFF_TO_LIN( seg
, ptr
) = 0; /* clear previous bp */
1208 /***********************************************************************
1209 * SwitchStackBack (KERNEL.109)
1211 void WINAPI
SwitchStackBack16( CONTEXT86
*context
)
1213 STACK16FRAME
*oldFrame
, *newFrame
;
1214 INSTANCEDATA
*pData
;
1216 if (!(pData
= (INSTANCEDATA
*)GlobalLock16(SELECTOROF(NtCurrentTeb()->cur_stack
))))
1218 if (!pData
->old_ss_sp
)
1220 WARN("No previous SwitchStackTo\n" );
1223 TRACE("restoring stack %04x:%04x\n",
1224 SELECTOROF(pData
->old_ss_sp
), OFFSETOF(pData
->old_ss_sp
) );
1226 oldFrame
= CURRENT_STACK16
;
1228 /* Pop bp from the previous stack */
1230 BP_reg(context
) = *(WORD
*)PTR_SEG_TO_LIN(pData
->old_ss_sp
);
1231 pData
->old_ss_sp
+= sizeof(WORD
);
1233 /* Switch back to the old stack */
1235 NtCurrentTeb()->cur_stack
= pData
->old_ss_sp
- sizeof(STACK16FRAME
);
1236 SS_reg(context
) = SELECTOROF(pData
->old_ss_sp
);
1237 ESP_reg(context
) = OFFSETOF(pData
->old_ss_sp
) - sizeof(DWORD
); /*ret addr*/
1238 pData
->old_ss_sp
= 0;
1240 /* Build a stack frame for the return */
1242 newFrame
= CURRENT_STACK16
;
1243 newFrame
->frame32
= oldFrame
->frame32
;
1244 newFrame
->module_cs
= oldFrame
->module_cs
;
1245 newFrame
->callfrom_ip
= oldFrame
->callfrom_ip
;
1246 newFrame
->entry_ip
= oldFrame
->entry_ip
;
1250 /***********************************************************************
1251 * GetTaskQueueDS16 (KERNEL.118)
1253 void WINAPI
GetTaskQueueDS16(void)
1255 CURRENT_STACK16
->ds
= GlobalHandleToSel16( GetTaskQueue16(0) );
1259 /***********************************************************************
1260 * GetTaskQueueES16 (KERNEL.119)
1262 void WINAPI
GetTaskQueueES16(void)
1264 CURRENT_STACK16
->es
= GlobalHandleToSel16( GetTaskQueue16(0) );
1268 /***********************************************************************
1269 * GetCurrentTask (KERNEL.36)
1271 HTASK16 WINAPI
GetCurrentTask(void)
1273 return NtCurrentTeb()->htask16
;
1276 DWORD WINAPI
WIN16_GetCurrentTask(void)
1278 /* This is the version used by relay code; the first task is */
1279 /* returned in the high word of the result */
1280 return MAKELONG( GetCurrentTask(), hFirstTask
);
1284 /***********************************************************************
1285 * GetCurrentPDB (KERNEL.37)
1287 * UNDOC: returns PSP of KERNEL in high word
1289 DWORD WINAPI
GetCurrentPDB16(void)
1293 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1294 return MAKELONG(pTask
->hPDB
, 0); /* FIXME */
1298 /***********************************************************************
1299 * GetCurPID16 (KERNEL.157)
1301 DWORD WINAPI
GetCurPID16( DWORD unused
)
1307 /***********************************************************************
1308 * GetInstanceData (KERNEL.54)
1310 INT16 WINAPI
GetInstanceData16( HINSTANCE16 instance
, WORD buffer
, INT16 len
)
1312 char *ptr
= (char *)GlobalLock16( instance
);
1313 if (!ptr
|| !len
) return 0;
1314 if ((int)buffer
+ len
>= 0x10000) len
= 0x10000 - buffer
;
1315 memcpy( (char *)GlobalLock16(CURRENT_DS
) + buffer
, ptr
+ buffer
, len
);
1320 /***********************************************************************
1321 * GetExeVersion (KERNEL.105)
1323 WORD WINAPI
GetExeVersion16(void)
1327 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1328 return pTask
->version
;
1332 /***********************************************************************
1333 * SetErrorMode16 (KERNEL.107)
1335 UINT16 WINAPI
SetErrorMode16( UINT16 mode
)
1338 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1339 pTask
->error_mode
= mode
;
1340 return SetErrorMode( mode
);
1344 /***********************************************************************
1345 * GetDOSEnvironment (KERNEL.131)
1347 SEGPTR WINAPI
GetDOSEnvironment16(void)
1351 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1352 return PTR_SEG_OFF_TO_SEGPTR( pTask
->pdb
.environment
, 0 );
1356 /***********************************************************************
1357 * GetNumTasks (KERNEL.152)
1359 UINT16 WINAPI
GetNumTasks16(void)
1365 /***********************************************************************
1366 * GetTaskDS (KERNEL.155)
1368 * Note: this function apparently returns a DWORD with LOWORD == HIWORD.
1369 * I don't think we need to bother with this.
1371 HINSTANCE16 WINAPI
GetTaskDS16(void)
1375 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1376 return GlobalHandleToSel16(pTask
->hInstance
);
1379 /***********************************************************************
1380 * GetDummyModuleHandleDS (KERNEL.602)
1382 WORD WINAPI
GetDummyModuleHandleDS16(void)
1387 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1388 if (!(pTask
->flags
& TDBF_WIN32
)) return 0;
1389 selector
= GlobalHandleToSel16( pTask
->hModule
);
1390 CURRENT_DS
= selector
;
1394 /***********************************************************************
1395 * IsTask (KERNEL.320)
1397 BOOL16 WINAPI
IsTask16( HTASK16 hTask
)
1401 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return FALSE
;
1402 if (GlobalSize16( hTask
) < sizeof(TDB
)) return FALSE
;
1403 return (pTask
->magic
== TDB_MAGIC
);
1407 /***********************************************************************
1408 * IsWinOldApTask16 (KERNEL.158)
1410 BOOL16 WINAPI
IsWinOldApTask16( HTASK16 hTask
)
1412 /* should return bit 0 of byte 0x48 in PSP */
1416 /***********************************************************************
1417 * SetTaskSignalProc (KERNEL.38)
1419 FARPROC16 WINAPI
SetTaskSignalProc( HTASK16 hTask
, FARPROC16 proc
)
1424 if (!hTask
) hTask
= GetCurrentTask();
1425 if (!(pTask
= (TDB
*)GlobalLock16( hTask
))) return NULL
;
1426 oldProc
= pTask
->userhandler
;
1427 pTask
->userhandler
= proc
;
1431 /***********************************************************************
1432 * TASK_CallTaskSignalProc
1434 /* ### start build ### */
1435 extern WORD CALLBACK
TASK_CallTo16_word_wwwww(FARPROC16
,WORD
,WORD
,WORD
,WORD
,WORD
);
1436 /* ### stop build ### */
1437 void TASK_CallTaskSignalProc( UINT16 uCode
, HANDLE16 hTaskOrModule
)
1439 TDB
*pTask
= (TDB
*)GlobalLock16( GetCurrentTask() );
1440 if ( !pTask
|| !pTask
->userhandler
) return;
1442 TASK_CallTo16_word_wwwww( pTask
->userhandler
,
1443 hTaskOrModule
, uCode
, 0,
1444 pTask
->hInstance
, pTask
->hQueue
);
1447 /***********************************************************************
1448 * SetSigHandler (KERNEL.140)
1450 WORD WINAPI
SetSigHandler16( FARPROC16 newhandler
, FARPROC16
* oldhandler
,
1451 UINT16
*oldmode
, UINT16 newmode
, UINT16 flag
)
1453 FIXME("(%p,%p,%p,%d,%d), unimplemented.\n",
1454 newhandler
,oldhandler
,oldmode
,newmode
,flag
);
1456 if (flag
!= 1) return 0;
1457 if (!newmode
) newhandler
= NULL
; /* Default handler */
1462 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return 0;
1463 if (oldmode
) *oldmode
= pTask
->signal_flags
;
1464 pTask
->signal_flags
= newmode
;
1465 if (oldhandler
) *oldhandler
= pTask
->sighandler
;
1466 pTask
->sighandler
= newhandler
;
1472 /***********************************************************************
1473 * GlobalNotify (KERNEL.154)
1475 * Note that GlobalNotify does _not_ return the old NotifyProc
1476 * -- contrary to LocalNotify !!
1478 VOID WINAPI
GlobalNotify16( FARPROC16 proc
)
1482 if (!(pTask
= (TDB
*)GlobalLock16( GetCurrentTask() ))) return;
1483 pTask
->discardhandler
= proc
;
1487 /***********************************************************************
1488 * GetExePtr (KERNEL.133)
1490 static inline HMODULE16
GetExePtrHelper( HANDLE16 handle
, HTASK16
*hTask
)
1495 /* Check for module handle */
1497 if (!(ptr
= GlobalLock16( handle
))) return 0;
1498 if (((NE_MODULE
*)ptr
)->magic
== IMAGE_OS2_SIGNATURE
) return handle
;
1500 /* Search for this handle inside all tasks */
1502 *hTask
= hFirstTask
;
1505 TDB
*pTask
= (TDB
*)GlobalLock16( *hTask
);
1506 if ((*hTask
== handle
) ||
1507 (pTask
->hInstance
== handle
) ||
1508 (pTask
->hQueue
== handle
) ||
1509 (pTask
->hPDB
== handle
)) return pTask
->hModule
;
1510 *hTask
= pTask
->hNext
;
1513 /* Check the owner for module handle */
1515 owner
= FarGetOwner16( handle
);
1516 if (!(ptr
= GlobalLock16( owner
))) return 0;
1517 if (((NE_MODULE
*)ptr
)->magic
== IMAGE_OS2_SIGNATURE
) return owner
;
1519 /* Search for the owner inside all tasks */
1521 *hTask
= hFirstTask
;
1524 TDB
*pTask
= (TDB
*)GlobalLock16( *hTask
);
1525 if ((*hTask
== owner
) ||
1526 (pTask
->hInstance
== owner
) ||
1527 (pTask
->hQueue
== owner
) ||
1528 (pTask
->hPDB
== owner
)) return pTask
->hModule
;
1529 *hTask
= pTask
->hNext
;
1535 HMODULE16 WINAPI
WIN16_GetExePtr( HANDLE16 handle
)
1538 HMODULE16 hModule
= GetExePtrHelper( handle
, &hTask
);
1539 STACK16FRAME
*frame
= CURRENT_STACK16
;
1540 frame
->ecx
= hModule
;
1541 if (hTask
) frame
->es
= hTask
;
1545 HMODULE16 WINAPI
GetExePtr( HANDLE16 handle
)
1548 return GetExePtrHelper( handle
, &hTask
);
1552 /***********************************************************************
1553 * TaskFirst (TOOLHELP.63)
1555 BOOL16 WINAPI
TaskFirst16( TASKENTRY
*lpte
)
1557 lpte
->hNext
= hFirstTask
;
1558 return TaskNext16( lpte
);
1562 /***********************************************************************
1563 * TaskNext (TOOLHELP.64)
1565 BOOL16 WINAPI
TaskNext16( TASKENTRY
*lpte
)
1568 INSTANCEDATA
*pInstData
;
1570 TRACE_(toolhelp
)("(%p): task=%04x\n", lpte
, lpte
->hNext
);
1571 if (!lpte
->hNext
) return FALSE
;
1572 pTask
= (TDB
*)GlobalLock16( lpte
->hNext
);
1573 if (!pTask
|| pTask
->magic
!= TDB_MAGIC
) return FALSE
;
1574 pInstData
= (INSTANCEDATA
*)PTR_SEG_OFF_TO_LIN( GlobalHandleToSel16(pTask
->hInstance
), 0 );
1575 lpte
->hTask
= lpte
->hNext
;
1576 lpte
->hTaskParent
= pTask
->hParent
;
1577 lpte
->hInst
= pTask
->hInstance
;
1578 lpte
->hModule
= pTask
->hModule
;
1579 lpte
->wSS
= SELECTOROF( pTask
->teb
->cur_stack
);
1580 lpte
->wSP
= OFFSETOF( pTask
->teb
->cur_stack
);
1581 lpte
->wStackTop
= pInstData
->stacktop
;
1582 lpte
->wStackMinimum
= pInstData
->stackmin
;
1583 lpte
->wStackBottom
= pInstData
->stackbottom
;
1584 lpte
->wcEvents
= pTask
->nEvents
;
1585 lpte
->hQueue
= pTask
->hQueue
;
1586 lstrcpynA( lpte
->szModule
, pTask
->module_name
, sizeof(lpte
->szModule
) );
1587 lpte
->wPSPOffset
= 0x100; /*??*/
1588 lpte
->hNext
= pTask
->hNext
;
1593 /***********************************************************************
1594 * TaskFindHandle (TOOLHELP.65)
1596 BOOL16 WINAPI
TaskFindHandle16( TASKENTRY
*lpte
, HTASK16 hTask
)
1598 lpte
->hNext
= hTask
;
1599 return TaskNext16( lpte
);
1603 /***********************************************************************
1604 * GetAppCompatFlags16 (KERNEL.354)
1606 DWORD WINAPI
GetAppCompatFlags16( HTASK16 hTask
)
1608 return GetAppCompatFlags( hTask
);
1612 /***********************************************************************
1613 * GetAppCompatFlags (USER32.206)
1615 DWORD WINAPI
GetAppCompatFlags( HTASK hTask
)
1619 if (!hTask
) hTask
= GetCurrentTask();
1620 if (!(pTask
=(TDB
*)GlobalLock16( (HTASK16
)hTask
))) return 0;
1621 if (GlobalSize16(hTask
) < sizeof(TDB
)) return 0;
1622 return pTask
->compat_flags
;