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;
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, WINE_LDT_FLAGS_CODE );
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, WINE_LDT_FLAGS_DATA );
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
247 pTask->version = pModule->expected_version;
248 pTask->hModule = pModule->self;
249 pTask->hParent = GetCurrentTask();
250 pTask->magic = TDB_MAGIC;
251 pTask->nCmdShow = cmdShow;
253 pTask->curdrive = DRIVE_GetCurrentDrive() | 0x80;
254 strcpy( pTask->curdir, "\\" );
255 lstrcpynA( pTask->curdir + 1, DRIVE_GetDosCwd( DRIVE_GetCurrentDrive() ),
256 sizeof(pTask->curdir) - 1 );
258 /* Create the thunks block */
260 TASK_CreateThunks( hTask, (int)&pTask->thunks - (int)pTask, 7 );
262 /* Copy the module name */
264 GetModuleName16( pModule->self, name, sizeof(name) );
265 strncpy( pTask->module_name, name, sizeof(pTask->module_name) );
267 /* Allocate a selector for the PDB */
269 pTask->hPDB = GLOBAL_CreateBlock( GMEM_FIXED, &pTask->pdb, sizeof(PDB16),
270 pModule->self, WINE_LDT_FLAGS_DATA );
274 pTask->pdb.int20 = 0x20cd;
275 pTask->pdb.dispatcher[0] = 0x9a; /* ljmp */
276 PUT_DWORD(&pTask->pdb.dispatcher[1], (DWORD)GetProcAddress16( GetModuleHandle16("KERNEL"),
278 pTask->pdb.savedint22 = INT_GetPMHandler( 0x22 );
279 pTask->pdb.savedint23 = INT_GetPMHandler( 0x23 );
280 pTask->pdb.savedint24 = INT_GetPMHandler( 0x24 );
281 pTask->pdb.fileHandlesPtr =
282 PTR_SEG_OFF_TO_SEGPTR( GlobalHandleToSel16(pTask->hPDB),
283 (int)&((PDB16 *)0)->fileHandles );
284 pTask->pdb.hFileHandles = 0;
285 memset( pTask->pdb.fileHandles, 0xff, sizeof(pTask->pdb.fileHandles) );
286 pTask->pdb.environment = current_envdb.env_sel;
287 pTask->pdb.nbFiles = 20;
289 /* Fill the command line */
293 cmdline = current_envdb.cmd_line;
294 /* remove the first word (program name) */
296 if (!(cmdline = strchr( cmdline+1, '"' ))) cmdline = current_envdb.cmd_line;
297 while (*cmdline && (*cmdline != ' ') && (*cmdline != '\t')) cmdline++;
298 while ((*cmdline == ' ') || (*cmdline == '\t')) cmdline++;
299 len = strlen(cmdline);
301 if (len >= sizeof(pTask->pdb.cmdLine)) len = sizeof(pTask->pdb.cmdLine)-1;
302 pTask->pdb.cmdLine[0] = len;
303 memcpy( pTask->pdb.cmdLine + 1, cmdline, len );
304 /* pTask->pdb.cmdLine[len+1] = 0; */
306 TRACE("module='%s' cmdline='%.*s' task=%04x\n", name, len, cmdline, hTask );
308 /* Get the compatibility flags */
310 pTask->compat_flags = GetProfileIntA( "Compatibility", name, 0 );
312 /* Allocate a code segment alias for the TDB */
314 pTask->hCSAlias = GLOBAL_CreateBlock( GMEM_FIXED, (void *)pTask,
315 sizeof(TDB), pTask->hPDB, WINE_LDT_FLAGS_CODE );
317 /* Set the owner of the environment block */
319 FarSetOwner16( pTask->pdb.environment, pTask->hPDB );
321 /* Default DTA overwrites command line */
323 pTask->dta = PTR_SEG_OFF_TO_SEGPTR( pTask->hPDB,
324 (int)&pTask->pdb.cmdLine - (int)&pTask->pdb );
326 /* Create scheduler event for 16-bit tasks */
328 if ( !(pTask->flags & TDBF_WIN32) )
329 NtCreateEvent( &pTask->hEvent, EVENT_ALL_ACCESS, NULL, TRUE, FALSE );
331 /* Enter task handle into thread and process */
333 teb->htask16 = hTask;
334 if (!initial_task) initial_task = hTask;
336 /* Add the task to the linked list */
339 TASK_LinkTask( hTask );
345 /***********************************************************************
348 static void TASK_DeleteTask( HTASK16 hTask )
353 if (!(pTask = (TDB *)GlobalLock16( hTask ))) return;
356 pTask->magic = 0xdead; /* invalidate signature */
358 /* Free the selector aliases */
360 GLOBAL_FreeBlock( pTask->hCSAlias );
361 GLOBAL_FreeBlock( pTask->hPDB );
363 /* Free the task module */
365 FreeModule16( pTask->hModule );
367 /* Free the task structure itself */
369 GlobalFree16( hTask );
371 /* Free all memory used by this task (including the 32-bit stack, */
372 /* the environment block and the thunk segments). */
374 GlobalFreeAll16( hPDB );
377 /***********************************************************************
380 void TASK_ExitTask(void)
385 /* Enter the Win16Lock to protect global data structures */
388 pTask = (TDB *)GlobalLock16( GetCurrentTask() );
395 TRACE("Killing task %04x\n", pTask->hSelf );
397 /* Perform USER cleanup */
399 TASK_CallTaskSignalProc( USIG16_TERMINATION, pTask->hSelf );
400 PROCESS_CallUserSignalProc( USIG_PROCESS_EXIT, 0 );
401 PROCESS_CallUserSignalProc( USIG_THREAD_EXIT, 0 );
402 PROCESS_CallUserSignalProc( USIG_PROCESS_DESTROY, 0 );
404 /* Remove the task from the list to be sure we never switch back to it */
405 TASK_UnlinkTask( pTask->hSelf );
407 if (!nTaskCount || (nTaskCount == 1 && hFirstTask == initial_task))
409 TRACE("this is the last task, exiting\n" );
415 TDB* p = (TDB *)GlobalLock16( hFirstTask );
418 if( p->hYieldTo == pTask->hSelf ) p->hYieldTo = 0;
419 p = (TDB *)GlobalLock16( p->hNext );
425 if ( hLockedTask == pTask->hSelf )
428 TASK_DeleteTask( pTask->hSelf );
430 /* ... schedule another one ... */
433 /* ... and completely release the Win16Lock, just in case. */
434 ReleaseThunkLock( &lockCount );
437 /***********************************************************************
440 * This is where all the magic of task-switching happens!
442 * 16-bit Windows performs non-preemptive (cooperative) multitasking.
443 * This means that each 16-bit task runs until it voluntarily yields
444 * control, at which point the scheduler gets active and selects the
447 * In Wine, all processes, even 16-bit ones, are scheduled preemptively
448 * by the standard scheduler of the underlying OS. As many 16-bit apps
449 * *rely* on the behaviour of the Windows scheduler, however, we have
450 * to simulate that behaviour.
452 * This is achieved as follows: every 16-bit task is at time (except
453 * during task creation and deletion) in one of two states: either it
454 * is the one currently running, then the global variable hCurrentTask
455 * contains its task handle, or it is not currently running, then it
456 * is blocked on a special scheduler event, a global handle which
457 * is stored in the task struct.
459 * When the current task yields control, this routine gets called. Its
460 * purpose is to determine the next task to be active, signal the
461 * scheduler event of that task, and then put the current task to sleep
462 * waiting for *its* scheduler event to get signalled again.
464 * This routine can get called in a few other special situations as well:
466 * - On creation of a 16-bit task, the Unix process executing the task
467 * calls TASK_Reschedule once it has completed its initialization.
468 * At this point, the task needs to be blocked until its scheduler
469 * event is signalled the first time (this will be done by the parent
470 * process to get the task up and running).
472 * - When the task currently running terminates itself, this routine gets
473 * called and has to schedule another task, *without* blocking the
476 * - When a 32-bit thread posts an event for a 16-bit task, it might be
477 * the case that *no* 16-bit task is currently running. In this case
478 * the task that has now an event pending is to be scheduled.
481 void TASK_Reschedule(void)
483 TDB *pOldTask = NULL, *pNewTask = NULL;
484 HTASK16 hOldTask = 0, hNewTask = 0;
485 enum { MODE_YIELD, MODE_SLEEP, MODE_WAKEUP } mode;
490 /* Check what we need to do */
491 hOldTask = GetCurrentTask();
492 pOldTask = (TDB *)GlobalLock16( hOldTask );
493 TRACE( "entered with hCurrentTask %04x by hTask %04x (pid %ld)\n",
494 hCurrentTask, hOldTask, (long) getpid() );
496 if ( pOldTask && THREAD_IsWin16( NtCurrentTeb() ) )
498 /* We are called by an active (non-deleted) 16-bit task */
500 /* If we don't even have a current task, or else the current
501 task has yielded, we'll need to schedule a new task and
502 (possibly) put the calling task to sleep. Otherwise, we
503 only block the caller. */
505 if ( !hCurrentTask || hCurrentTask == hOldTask )
512 /* We are called by a deleted 16-bit task or a 32-bit thread */
514 /* The only situation where we need to do something is if we
515 now do not have a current task. Then, we'll need to wake up
516 some task that has events pending. */
518 if ( !hCurrentTask || hCurrentTask == hOldTask )
528 /* Find a task to yield to: check for DirectedYield() */
529 if ( mode == MODE_YIELD && pOldTask && pOldTask->hYieldTo )
531 hNewTask = pOldTask->hYieldTo;
532 pNewTask = (TDB *)GlobalLock16( hNewTask );
533 if( !pNewTask || !pNewTask->nEvents) hNewTask = 0;
534 pOldTask->hYieldTo = 0;
537 /* Find a task to yield to: check for pending events */
538 if ( (mode == MODE_YIELD || mode == MODE_WAKEUP) && !hNewTask )
540 hNewTask = hFirstTask;
543 pNewTask = (TDB *)GlobalLock16( hNewTask );
545 TRACE( "\ttask = %04x, events = %i\n", hNewTask, pNewTask->nEvents );
547 if (pNewTask->nEvents) break;
548 hNewTask = pNewTask->hNext;
550 if (hLockedTask && (hNewTask != hLockedTask)) hNewTask = 0;
553 /* If we are still the task with highest priority, just return ... */
554 if ( mode == MODE_YIELD && hNewTask && hNewTask == hCurrentTask )
556 TRACE("returning to the current task (%04x)\n", hCurrentTask );
559 /* Allow Win32 threads to thunk down even while a Win16 task is
560 in a tight PeekMessage() or Yield() loop ... */
561 ReleaseThunkLock( &lockCount );
562 RestoreThunkLock( lockCount );
566 /* If no task to yield to found, suspend 16-bit scheduler ... */
567 if ( mode == MODE_YIELD && !hNewTask )
569 TRACE("No currently active task\n");
573 /* If we found a task to wake up, do it ... */
574 if ( (mode == MODE_YIELD || mode == MODE_WAKEUP) && hNewTask )
576 TRACE("Switching to task %04x (%.8s)\n",
577 hNewTask, pNewTask->module_name );
579 pNewTask->priority++;
580 TASK_UnlinkTask( hNewTask );
581 TASK_LinkTask( hNewTask );
582 pNewTask->priority--;
584 hCurrentTask = hNewTask;
585 NtSetEvent( pNewTask->hEvent, NULL );
587 /* This is set just in case some app reads it ... */
588 pNewTask->ss_sp = pNewTask->teb->cur_stack;
591 /* If we need to put the current task to sleep, do it ... */
592 if ( (mode == MODE_YIELD || mode == MODE_SLEEP) && hOldTask != hCurrentTask )
594 NtResetEvent( pOldTask->hEvent, NULL );
596 ReleaseThunkLock( &lockCount );
597 SYSLEVEL_CheckNotLevel( 1 );
598 WaitForSingleObject( pOldTask->hEvent, INFINITE );
599 RestoreThunkLock( lockCount );
605 /***********************************************************************
606 * InitTask (KERNEL.91)
608 * Called by the application startup code.
610 void WINAPI InitTask16( CONTEXT86 *context )
613 INSTANCEDATA *pinstance;
617 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return;
619 /* Note: we need to trust that BX/CX contain the stack/heap sizes,
620 as some apps, notably Visual Basic apps, *modify* the heap/stack
621 size of the instance data segment before calling InitTask() */
623 /* Initialize the INSTANCEDATA structure */
624 pinstance = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN(CURRENT_DS, 0);
625 pinstance->stackmin = OFFSETOF( pTask->teb->cur_stack ) + sizeof( STACK16FRAME );
626 pinstance->stackbottom = pinstance->stackmin; /* yup, that's right. Confused me too. */
627 pinstance->stacktop = ( pinstance->stackmin > LOWORD(context->Ebx) ?
628 pinstance->stackmin - LOWORD(context->Ebx) : 0 ) + 150;
630 /* Initialize the local heap */
631 if (LOWORD(context->Ecx))
632 LocalInit16( GlobalHandleToSel16(pTask->hInstance), 0, LOWORD(context->Ecx) );
634 /* Initialize implicitly loaded DLLs */
635 NE_InitializeDLLs( pTask->hModule );
636 NE_DllProcessAttach( pTask->hModule );
638 /* Registers on return are:
639 * ax 1 if OK, 0 on error
640 * cx stack limit in bytes
641 * dx cmdShow parameter
642 * si instance handle of the previous instance
643 * di instance handle of the new task
644 * es:bx pointer to command line inside PSP
646 * 0 (=%bp) is pushed on the stack
648 ptr = stack16_push( sizeof(WORD) );
649 *(WORD *)PTR_SEG_TO_LIN(ptr) = 0;
654 if (!pTask->pdb.cmdLine[0]) context->Ebx = 0x80;
657 LPBYTE p = &pTask->pdb.cmdLine[1];
658 while ((*p == ' ') || (*p == '\t')) p++;
659 context->Ebx = 0x80 + (p - pTask->pdb.cmdLine);
661 context->Ecx = pinstance->stacktop;
662 context->Edx = pTask->nCmdShow;
663 context->Esi = (DWORD)pTask->hPrevInstance;
664 context->Edi = (DWORD)pTask->hInstance;
665 context->SegEs = (WORD)pTask->hPDB;
669 /***********************************************************************
670 * WaitEvent (KERNEL.30)
672 BOOL16 WINAPI WaitEvent16( HTASK16 hTask )
676 if (!hTask) hTask = GetCurrentTask();
677 pTask = (TDB *)GlobalLock16( hTask );
679 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
681 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel);
685 if (pTask->nEvents > 0)
692 /* When we get back here, we have an event */
694 if (pTask->nEvents > 0) pTask->nEvents--;
699 /***********************************************************************
700 * PostEvent (KERNEL.31)
702 void WINAPI PostEvent16( HTASK16 hTask )
706 if (!hTask) hTask = GetCurrentTask();
707 if (!(pTask = (TDB *)GlobalLock16( hTask ))) return;
709 if ( !THREAD_IsWin16( pTask->teb ) )
711 FIXME("called for Win32 thread (%04x)!\n", pTask->teb->teb_sel );
717 /* If we are a 32-bit task, we might need to wake up the 16-bit scheduler */
718 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
723 /***********************************************************************
724 * SetPriority (KERNEL.32)
726 void WINAPI SetPriority16( HTASK16 hTask, INT16 delta )
731 if (!hTask) hTask = GetCurrentTask();
732 if (!(pTask = (TDB *)GlobalLock16( hTask ))) return;
733 newpriority = pTask->priority + delta;
734 if (newpriority < -32) newpriority = -32;
735 else if (newpriority > 15) newpriority = 15;
737 pTask->priority = newpriority + 1;
738 TASK_UnlinkTask( hTask );
739 TASK_LinkTask( hTask );
744 /***********************************************************************
745 * LockCurrentTask (KERNEL.33)
747 HTASK16 WINAPI LockCurrentTask16( BOOL16 bLock )
749 if (bLock) hLockedTask = GetCurrentTask();
750 else hLockedTask = 0;
755 /***********************************************************************
756 * IsTaskLocked (KERNEL.122)
758 HTASK16 WINAPI IsTaskLocked16(void)
764 /***********************************************************************
765 * OldYield (KERNEL.117)
767 void WINAPI OldYield16(void)
769 TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
771 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
773 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel);
777 if (pCurTask) pCurTask->nEvents++; /* Make sure we get back here */
779 if (pCurTask) pCurTask->nEvents--;
782 /***********************************************************************
783 * WIN32_OldYield16 (KERNEL.447)
785 void WINAPI WIN32_OldYield16(void)
789 ReleaseThunkLock(&count);
790 RestoreThunkLock(count);
793 /***********************************************************************
794 * DirectedYield (KERNEL.150)
796 void WINAPI DirectedYield16( HTASK16 hTask )
798 TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
800 if ( !THREAD_IsWin16( NtCurrentTeb() ) )
802 FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel);
806 TRACE("%04x: DirectedYield(%04x)\n", pCurTask->hSelf, hTask );
808 pCurTask->hYieldTo = hTask;
811 TRACE("%04x: back from DirectedYield(%04x)\n", pCurTask->hSelf, hTask );
814 /***********************************************************************
815 * Yield16 (KERNEL.29)
817 void WINAPI Yield16(void)
819 TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
821 if (pCurTask) pCurTask->hYieldTo = 0;
822 if (pCurTask && pCurTask->hQueue && Callout.UserYield16) Callout.UserYield16();
826 /***********************************************************************
827 * KERNEL_490 (KERNEL.490)
829 HTASK16 WINAPI KERNEL_490( HTASK16 someTask )
831 if ( !someTask ) return 0;
833 FIXME("(%04x): stub\n", someTask );
837 /***********************************************************************
838 * MakeProcInstance16 (KERNEL.51)
840 FARPROC16 WINAPI MakeProcInstance16( FARPROC16 func, HANDLE16 hInstance )
844 WORD hInstanceSelector;
846 hInstanceSelector = GlobalHandleToSel16(hInstance);
848 TRACE("(%08lx, %04x);\n", (DWORD)func, hInstance);
851 /* Win95 actually protects via SEH, but this is better for debugging */
852 WARN("Ouch ! Called with invalid func 0x%08lx !\n", (DWORD)func);
858 if ( (!(hInstance & 4)) ||
859 ((hInstance != 0xffff) && IS_SELECTOR_FREE(hInstance|7)) )
861 WARN("Invalid hInstance (%04x) passed to MakeProcInstance !\n",
867 if ( (GlobalHandleToSel16(CURRENT_DS) != hInstanceSelector)
869 && (hInstance != 0xffff) )
871 /* calling MPI with a foreign DSEG is invalid ! */
872 WARN("Problem with hInstance? Got %04x, using %04x instead\n",
873 hInstance,CURRENT_DS);
876 /* Always use the DSEG that MPI was entered with.
877 * We used to set hInstance to GetTaskDS16(), but this should be wrong
878 * as CURRENT_DS provides the DSEG value we need.
879 * ("calling" DS, *not* "task" DS !) */
880 hInstanceSelector = CURRENT_DS;
881 hInstance = GlobalHandle16(hInstanceSelector);
883 /* no thunking for DLLs */
884 if (NE_GetPtr(FarGetOwner16(hInstance))->flags & NE_FFLAGS_LIBMODULE)
887 thunkaddr = TASK_AllocThunk( GetCurrentTask() );
888 if (!thunkaddr) return (FARPROC16)0;
889 thunk = PTR_SEG_TO_LIN( thunkaddr );
890 lfunc = PTR_SEG_TO_LIN( func );
892 TRACE("(%08lx,%04x): got thunk %08lx\n",
893 (DWORD)func, hInstance, (DWORD)thunkaddr );
894 if (((lfunc[0]==0x8c) && (lfunc[1]==0xd8)) || /* movw %ds, %ax */
895 ((lfunc[0]==0x1e) && (lfunc[1]==0x58)) /* pushw %ds, popw %ax */
897 WARN("This was the (in)famous \"thunk useless\" warning. We thought we have to overwrite with nop;nop;, but this isn't true.\n");
900 *thunk++ = 0xb8; /* movw instance, %ax */
901 *thunk++ = (BYTE)(hInstanceSelector & 0xff);
902 *thunk++ = (BYTE)(hInstanceSelector >> 8);
903 *thunk++ = 0xea; /* ljmp func */
904 *(DWORD *)thunk = (DWORD)func;
905 return (FARPROC16)thunkaddr;
906 /* CX reg indicates if thunkaddr != NULL, implement if needed */
910 /***********************************************************************
911 * FreeProcInstance16 (KERNEL.52)
913 void WINAPI FreeProcInstance16( FARPROC16 func )
915 TRACE("(%08lx)\n", (DWORD)func );
916 TASK_FreeThunk( GetCurrentTask(), (SEGPTR)func );
919 /**********************************************************************
920 * TASK_GetCodeSegment
922 * Helper function for GetCodeHandle/GetCodeInfo: Retrieve the module
923 * and logical segment number of a given code segment.
925 * 'proc' either *is* already a pair of module handle and segment number,
926 * in which case there's nothing to do. Otherwise, it is a pointer to
927 * a function, and we need to retrieve the code segment. If the pointer
928 * happens to point to a thunk, we'll retrieve info about the code segment
929 * where the function pointed to by the thunk resides, not the thunk itself.
931 * FIXME: if 'proc' is a SNOOP16 return stub, we should retrieve info about
932 * the function the snoop code will return to ...
935 static BOOL TASK_GetCodeSegment( FARPROC16 proc, NE_MODULE **ppModule,
936 SEGTABLEENTRY **ppSeg, int *pSegNr )
938 NE_MODULE *pModule = NULL;
939 SEGTABLEENTRY *pSeg = NULL;
942 /* Try pair of module handle / segment number */
943 pModule = (NE_MODULE *) GlobalLock16( HIWORD( proc ) );
944 if ( pModule && pModule->magic == IMAGE_OS2_SIGNATURE )
946 segNr = LOWORD( proc );
947 if ( segNr && segNr <= pModule->seg_count )
948 pSeg = NE_SEG_TABLE( pModule ) + segNr-1;
951 /* Try thunk or function */
954 BYTE *thunk = (BYTE *)PTR_SEG_TO_LIN( proc );
957 if ((thunk[0] == 0xb8) && (thunk[3] == 0xea))
958 selector = thunk[6] + (thunk[7] << 8);
960 selector = HIWORD( proc );
962 pModule = NE_GetPtr( GlobalHandle16( selector ) );
963 pSeg = pModule? NE_SEG_TABLE( pModule ) : NULL;
966 for ( segNr = 1; segNr <= pModule->seg_count; segNr++, pSeg++ )
967 if ( GlobalHandleToSel16(pSeg->hSeg) == selector )
970 if ( pModule && segNr > pModule->seg_count )
974 /* Abort if segment not found */
976 if ( !pModule || !pSeg )
979 /* Return segment data */
981 if ( ppModule ) *ppModule = pModule;
982 if ( ppSeg ) *ppSeg = pSeg;
983 if ( pSegNr ) *pSegNr = segNr;
988 /**********************************************************************
989 * GetCodeHandle (KERNEL.93)
991 HANDLE16 WINAPI GetCodeHandle16( FARPROC16 proc )
995 if ( !TASK_GetCodeSegment( proc, NULL, &pSeg, NULL ) )
1001 /**********************************************************************
1002 * GetCodeInfo (KERNEL.104)
1004 BOOL16 WINAPI GetCodeInfo16( FARPROC16 proc, SEGINFO *segInfo )
1007 SEGTABLEENTRY *pSeg;
1010 if ( !TASK_GetCodeSegment( proc, &pModule, &pSeg, &segNr ) )
1013 /* Fill in segment information */
1015 segInfo->offSegment = pSeg->filepos;
1016 segInfo->cbSegment = pSeg->size;
1017 segInfo->flags = pSeg->flags;
1018 segInfo->cbAlloc = pSeg->minsize;
1019 segInfo->h = pSeg->hSeg;
1020 segInfo->alignShift = pModule->alignment;
1022 if ( segNr == pModule->dgroup )
1023 segInfo->cbAlloc += pModule->heap_size + pModule->stack_size;
1025 /* Return module handle in %es */
1027 CURRENT_STACK16->es = GlobalHandleToSel16( pModule->self );
1033 /**********************************************************************
1034 * DefineHandleTable16 (KERNEL.94)
1036 BOOL16 WINAPI DefineHandleTable16( WORD wOffset )
1038 FIXME("(%04x): stub ?\n", wOffset);
1043 /***********************************************************************
1044 * SetTaskQueue (KERNEL.34)
1046 HQUEUE16 WINAPI SetTaskQueue16( HTASK16 hTask, HQUEUE16 hQueue )
1051 if (!hTask) hTask = GetCurrentTask();
1052 if (!(pTask = (TDB *)GlobalLock16( hTask ))) return 0;
1054 hPrev = pTask->hQueue;
1055 pTask->hQueue = hQueue;
1061 /***********************************************************************
1062 * GetTaskQueue (KERNEL.35)
1064 HQUEUE16 WINAPI GetTaskQueue16( HTASK16 hTask )
1068 if (!hTask) hTask = GetCurrentTask();
1069 if (!(pTask = (TDB *)GlobalLock16( hTask ))) return 0;
1070 return pTask->hQueue;
1073 /***********************************************************************
1074 * SetThreadQueue (KERNEL.463)
1076 HQUEUE16 WINAPI SetThreadQueue16( DWORD thread, HQUEUE16 hQueue )
1078 TEB *teb = thread? THREAD_IdToTEB( thread ) : NtCurrentTeb();
1079 HQUEUE16 oldQueue = teb? teb->queue : 0;
1083 teb->queue = hQueue;
1085 if ( GetTaskQueue16( teb->htask16 ) == oldQueue )
1086 SetTaskQueue16( teb->htask16, hQueue );
1092 /***********************************************************************
1093 * GetThreadQueue (KERNEL.464)
1095 HQUEUE16 WINAPI GetThreadQueue16( DWORD thread )
1099 teb = NtCurrentTeb();
1100 else if ( HIWORD(thread) )
1101 teb = THREAD_IdToTEB( thread );
1102 else if ( IsTask16( (HTASK16)thread ) )
1103 teb = ((TDB *)GlobalLock16( (HANDLE16)thread ))->teb;
1105 return (HQUEUE16)(teb? teb->queue : 0);
1108 /***********************************************************************
1109 * SetFastQueue (KERNEL.624)
1111 VOID WINAPI SetFastQueue16( DWORD thread, HANDLE hQueue )
1115 teb = NtCurrentTeb();
1116 else if ( HIWORD(thread) )
1117 teb = THREAD_IdToTEB( thread );
1118 else if ( IsTask16( (HTASK16)thread ) )
1119 teb = ((TDB *)GlobalLock16( (HANDLE16)thread ))->teb;
1121 if ( teb ) teb->queue = (HQUEUE16) hQueue;
1124 /***********************************************************************
1125 * GetFastQueue (KERNEL.625)
1127 HANDLE WINAPI GetFastQueue16( void )
1129 TEB *teb = NtCurrentTeb();
1132 if (!teb->queue && Callout.InitThreadInput16)
1133 Callout.InitThreadInput16( 0, THREAD_IsWin16(teb)? 4 : 5 );
1136 FIXME("(): should initialize thread-local queue, expect failure!\n" );
1138 return (HANDLE)teb->queue;
1141 /***********************************************************************
1142 * SwitchStackTo (KERNEL.108)
1144 void WINAPI SwitchStackTo16( WORD seg, WORD ptr, WORD top )
1147 STACK16FRAME *oldFrame, *newFrame;
1148 INSTANCEDATA *pData;
1151 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return;
1152 if (!(pData = (INSTANCEDATA *)GlobalLock16( seg ))) return;
1153 TRACE("old=%04x:%04x new=%04x:%04x\n",
1154 SELECTOROF( pTask->teb->cur_stack ),
1155 OFFSETOF( pTask->teb->cur_stack ), seg, ptr );
1157 /* Save the old stack */
1159 oldFrame = THREAD_STACK16( pTask->teb );
1160 /* pop frame + args and push bp */
1161 pData->old_ss_sp = pTask->teb->cur_stack + sizeof(STACK16FRAME)
1163 *(WORD *)PTR_SEG_TO_LIN(pData->old_ss_sp) = oldFrame->bp;
1164 pData->stacktop = top;
1165 pData->stackmin = ptr;
1166 pData->stackbottom = ptr;
1168 /* Switch to the new stack */
1170 /* Note: we need to take the 3 arguments into account; otherwise,
1171 * the stack will underflow upon return from this function.
1173 copySize = oldFrame->bp - OFFSETOF(pData->old_ss_sp);
1174 copySize += 3 * sizeof(WORD) + sizeof(STACK16FRAME);
1175 pTask->teb->cur_stack = PTR_SEG_OFF_TO_SEGPTR( seg, ptr - copySize );
1176 newFrame = THREAD_STACK16( pTask->teb );
1178 /* Copy the stack frame and the local variables to the new stack */
1180 memmove( newFrame, oldFrame, copySize );
1182 *(WORD *)PTR_SEG_OFF_TO_LIN( seg, ptr ) = 0; /* clear previous bp */
1186 /***********************************************************************
1187 * SwitchStackBack (KERNEL.109)
1189 void WINAPI SwitchStackBack16( CONTEXT86 *context )
1191 STACK16FRAME *oldFrame, *newFrame;
1192 INSTANCEDATA *pData;
1194 if (!(pData = (INSTANCEDATA *)GlobalLock16(SELECTOROF(NtCurrentTeb()->cur_stack))))
1196 if (!pData->old_ss_sp)
1198 WARN("No previous SwitchStackTo\n" );
1201 TRACE("restoring stack %04x:%04x\n",
1202 SELECTOROF(pData->old_ss_sp), OFFSETOF(pData->old_ss_sp) );
1204 oldFrame = CURRENT_STACK16;
1206 /* Pop bp from the previous stack */
1208 BP_reg(context) = *(WORD *)PTR_SEG_TO_LIN(pData->old_ss_sp);
1209 pData->old_ss_sp += sizeof(WORD);
1211 /* Switch back to the old stack */
1213 NtCurrentTeb()->cur_stack = pData->old_ss_sp - sizeof(STACK16FRAME);
1214 context->SegSs = SELECTOROF(pData->old_ss_sp);
1215 context->Esp = OFFSETOF(pData->old_ss_sp) - sizeof(DWORD); /*ret addr*/
1216 pData->old_ss_sp = 0;
1218 /* Build a stack frame for the return */
1220 newFrame = CURRENT_STACK16;
1221 newFrame->frame32 = oldFrame->frame32;
1222 newFrame->module_cs = oldFrame->module_cs;
1223 newFrame->callfrom_ip = oldFrame->callfrom_ip;
1224 newFrame->entry_ip = oldFrame->entry_ip;
1228 /***********************************************************************
1229 * GetTaskQueueDS16 (KERNEL.118)
1231 void WINAPI GetTaskQueueDS16(void)
1233 CURRENT_STACK16->ds = GlobalHandleToSel16( GetTaskQueue16(0) );
1237 /***********************************************************************
1238 * GetTaskQueueES16 (KERNEL.119)
1240 void WINAPI GetTaskQueueES16(void)
1242 CURRENT_STACK16->es = GlobalHandleToSel16( GetTaskQueue16(0) );
1246 /***********************************************************************
1247 * GetCurrentTask (KERNEL.36)
1249 HTASK16 WINAPI GetCurrentTask(void)
1251 return NtCurrentTeb()->htask16;
1254 DWORD WINAPI WIN16_GetCurrentTask(void)
1256 /* This is the version used by relay code; the first task is */
1257 /* returned in the high word of the result */
1258 return MAKELONG( GetCurrentTask(), hFirstTask );
1262 /***********************************************************************
1263 * GetCurrentPDB (KERNEL.37)
1265 * UNDOC: returns PSP of KERNEL in high word
1267 DWORD WINAPI GetCurrentPDB16(void)
1271 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
1272 return MAKELONG(pTask->hPDB, 0); /* FIXME */
1276 /***********************************************************************
1277 * GetCurPID16 (KERNEL.157)
1279 DWORD WINAPI GetCurPID16( DWORD unused )
1285 /***********************************************************************
1286 * GetInstanceData (KERNEL.54)
1288 INT16 WINAPI GetInstanceData16( HINSTANCE16 instance, WORD buffer, INT16 len )
1290 char *ptr = (char *)GlobalLock16( instance );
1291 if (!ptr || !len) return 0;
1292 if ((int)buffer + len >= 0x10000) len = 0x10000 - buffer;
1293 memcpy( (char *)GlobalLock16(CURRENT_DS) + buffer, ptr + buffer, len );
1298 /***********************************************************************
1299 * GetExeVersion (KERNEL.105)
1301 WORD WINAPI GetExeVersion16(void)
1305 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
1306 return pTask->version;
1310 /***********************************************************************
1311 * SetErrorMode16 (KERNEL.107)
1313 UINT16 WINAPI SetErrorMode16( UINT16 mode )
1316 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
1317 pTask->error_mode = mode;
1318 return SetErrorMode( mode );
1322 /***********************************************************************
1323 * GetDOSEnvironment (KERNEL.131)
1325 SEGPTR WINAPI GetDOSEnvironment16(void)
1329 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
1330 return PTR_SEG_OFF_TO_SEGPTR( pTask->pdb.environment, 0 );
1334 /***********************************************************************
1335 * GetNumTasks (KERNEL.152)
1337 UINT16 WINAPI GetNumTasks16(void)
1343 /***********************************************************************
1344 * GetTaskDS (KERNEL.155)
1346 * Note: this function apparently returns a DWORD with LOWORD == HIWORD.
1347 * I don't think we need to bother with this.
1349 HINSTANCE16 WINAPI GetTaskDS16(void)
1353 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
1354 return GlobalHandleToSel16(pTask->hInstance);
1357 /***********************************************************************
1358 * GetDummyModuleHandleDS (KERNEL.602)
1360 WORD WINAPI GetDummyModuleHandleDS16(void)
1365 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
1366 if (!(pTask->flags & TDBF_WIN32)) return 0;
1367 selector = GlobalHandleToSel16( pTask->hModule );
1368 CURRENT_DS = selector;
1372 /***********************************************************************
1373 * IsTask (KERNEL.320)
1375 BOOL16 WINAPI IsTask16( HTASK16 hTask )
1379 if (!(pTask = (TDB *)GlobalLock16( hTask ))) return FALSE;
1380 if (GlobalSize16( hTask ) < sizeof(TDB)) return FALSE;
1381 return (pTask->magic == TDB_MAGIC);
1385 /***********************************************************************
1386 * IsWinOldApTask16 (KERNEL.158)
1388 BOOL16 WINAPI IsWinOldApTask16( HTASK16 hTask )
1390 /* should return bit 0 of byte 0x48 in PSP */
1394 /***********************************************************************
1395 * SetTaskSignalProc (KERNEL.38)
1397 FARPROC16 WINAPI SetTaskSignalProc( HTASK16 hTask, FARPROC16 proc )
1402 if (!hTask) hTask = GetCurrentTask();
1403 if (!(pTask = (TDB *)GlobalLock16( hTask ))) return NULL;
1404 oldProc = pTask->userhandler;
1405 pTask->userhandler = proc;
1409 /***********************************************************************
1410 * TASK_CallTaskSignalProc
1412 /* ### start build ### */
1413 extern WORD CALLBACK TASK_CallTo16_word_wwwww(FARPROC16,WORD,WORD,WORD,WORD,WORD);
1414 /* ### stop build ### */
1415 void TASK_CallTaskSignalProc( UINT16 uCode, HANDLE16 hTaskOrModule )
1417 TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
1418 if ( !pTask || !pTask->userhandler ) return;
1420 TASK_CallTo16_word_wwwww( pTask->userhandler,
1421 hTaskOrModule, uCode, 0,
1422 pTask->hInstance, pTask->hQueue );
1425 /***********************************************************************
1426 * SetSigHandler (KERNEL.140)
1428 WORD WINAPI SetSigHandler16( FARPROC16 newhandler, FARPROC16* oldhandler,
1429 UINT16 *oldmode, UINT16 newmode, UINT16 flag )
1431 FIXME("(%p,%p,%p,%d,%d), unimplemented.\n",
1432 newhandler,oldhandler,oldmode,newmode,flag );
1434 if (flag != 1) return 0;
1435 if (!newmode) newhandler = NULL; /* Default handler */
1440 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
1441 if (oldmode) *oldmode = pTask->signal_flags;
1442 pTask->signal_flags = newmode;
1443 if (oldhandler) *oldhandler = pTask->sighandler;
1444 pTask->sighandler = newhandler;
1450 /***********************************************************************
1451 * GlobalNotify (KERNEL.154)
1453 * Note that GlobalNotify does _not_ return the old NotifyProc
1454 * -- contrary to LocalNotify !!
1456 VOID WINAPI GlobalNotify16( FARPROC16 proc )
1460 if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return;
1461 pTask->discardhandler = proc;
1465 /***********************************************************************
1466 * GetExePtr (KERNEL.133)
1468 static inline HMODULE16 GetExePtrHelper( HANDLE16 handle, HTASK16 *hTask )
1473 /* Check for module handle */
1475 if (!(ptr = GlobalLock16( handle ))) return 0;
1476 if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return handle;
1478 /* Search for this handle inside all tasks */
1480 *hTask = hFirstTask;
1483 TDB *pTask = (TDB *)GlobalLock16( *hTask );
1484 if ((*hTask == handle) ||
1485 (pTask->hInstance == handle) ||
1486 (pTask->hQueue == handle) ||
1487 (pTask->hPDB == handle)) return pTask->hModule;
1488 *hTask = pTask->hNext;
1491 /* Check the owner for module handle */
1493 owner = FarGetOwner16( handle );
1494 if (!(ptr = GlobalLock16( owner ))) return 0;
1495 if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return owner;
1497 /* Search for the owner inside all tasks */
1499 *hTask = hFirstTask;
1502 TDB *pTask = (TDB *)GlobalLock16( *hTask );
1503 if ((*hTask == owner) ||
1504 (pTask->hInstance == owner) ||
1505 (pTask->hQueue == owner) ||
1506 (pTask->hPDB == owner)) return pTask->hModule;
1507 *hTask = pTask->hNext;
1513 HMODULE16 WINAPI WIN16_GetExePtr( HANDLE16 handle )
1516 HMODULE16 hModule = GetExePtrHelper( handle, &hTask );
1517 STACK16FRAME *frame = CURRENT_STACK16;
1518 frame->ecx = hModule;
1519 if (hTask) frame->es = hTask;
1523 HMODULE16 WINAPI GetExePtr( HANDLE16 handle )
1526 return GetExePtrHelper( handle, &hTask );
1530 /***********************************************************************
1531 * TaskFirst (TOOLHELP.63)
1533 BOOL16 WINAPI TaskFirst16( TASKENTRY *lpte )
1535 lpte->hNext = hFirstTask;
1536 return TaskNext16( lpte );
1540 /***********************************************************************
1541 * TaskNext (TOOLHELP.64)
1543 BOOL16 WINAPI TaskNext16( TASKENTRY *lpte )
1546 INSTANCEDATA *pInstData;
1548 TRACE_(toolhelp)("(%p): task=%04x\n", lpte, lpte->hNext );
1549 if (!lpte->hNext) return FALSE;
1551 /* make sure that task and hInstance are valid (skip initial Wine task !) */
1553 pTask = (TDB *)GlobalLock16( lpte->hNext );
1554 if (!pTask || pTask->magic != TDB_MAGIC) return FALSE;
1555 if (pTask->hInstance)
1557 lpte->hNext = pTask->hNext;
1559 pInstData = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN( GlobalHandleToSel16(pTask->hInstance), 0 );
1560 lpte->hTask = lpte->hNext;
1561 lpte->hTaskParent = pTask->hParent;
1562 lpte->hInst = pTask->hInstance;
1563 lpte->hModule = pTask->hModule;
1564 lpte->wSS = SELECTOROF( pTask->teb->cur_stack );
1565 lpte->wSP = OFFSETOF( pTask->teb->cur_stack );
1566 lpte->wStackTop = pInstData->stacktop;
1567 lpte->wStackMinimum = pInstData->stackmin;
1568 lpte->wStackBottom = pInstData->stackbottom;
1569 lpte->wcEvents = pTask->nEvents;
1570 lpte->hQueue = pTask->hQueue;
1571 lstrcpynA( lpte->szModule, pTask->module_name, sizeof(lpte->szModule) );
1572 lpte->wPSPOffset = 0x100; /*??*/
1573 lpte->hNext = pTask->hNext;
1578 /***********************************************************************
1579 * TaskFindHandle (TOOLHELP.65)
1581 BOOL16 WINAPI TaskFindHandle16( TASKENTRY *lpte, HTASK16 hTask )
1583 lpte->hNext = hTask;
1584 return TaskNext16( lpte );
1588 /**************************************************************************
1589 * FatalAppExit16 (KERNEL.137)
1591 void WINAPI FatalAppExit16( UINT16 action, LPCSTR str )
1593 TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
1595 if (!pTask || !(pTask->error_mode & SEM_NOGPFAULTERRORBOX))
1597 if (Callout.MessageBoxA)
1598 Callout.MessageBoxA( 0, str, NULL, MB_SYSTEMMODAL | MB_OK );
1600 ERR( "%s\n", debugstr_a(str) );
1606 /***********************************************************************
1607 * TerminateApp16 (TOOLHELP.77)
1609 * See "Undocumented Windows".
1611 void WINAPI TerminateApp16(HTASK16 hTask, WORD wFlags)
1613 if (hTask && hTask != GetCurrentTask())
1615 FIXME("cannot terminate task %x\n", hTask);
1619 if (wFlags & NO_UAE_BOX)
1622 old_mode = SetErrorMode16(0);
1623 SetErrorMode16(old_mode|SEM_NOGPFAULTERRORBOX);
1625 FatalAppExit16( 0, NULL );
1627 /* hmm, we're still alive ?? */
1629 /* check undocumented flag */
1630 if (!(wFlags & 0x8000))
1631 TASK_CallTaskSignalProc( USIG16_TERMINATION, hTask );
1633 /* UndocWin says to call int 0x21/0x4c exit=0xff here,
1634 but let's just call ExitThread */
1639 /***********************************************************************
1640 * GetAppCompatFlags16 (KERNEL.354)
1642 DWORD WINAPI GetAppCompatFlags16( HTASK16 hTask )
1644 return GetAppCompatFlags( hTask );
1648 /***********************************************************************
1649 * GetAppCompatFlags (USER32.206)
1651 DWORD WINAPI GetAppCompatFlags( HTASK hTask )
1655 if (!hTask) hTask = GetCurrentTask();
1656 if (!(pTask=(TDB *)GlobalLock16( (HTASK16)hTask ))) return 0;
1657 if (GlobalSize16(hTask) < sizeof(TDB)) return 0;
1658 return pTask->compat_flags;