1610 lines
46 KiB
C
1610 lines
46 KiB
C
/*
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* Task functions
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*
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* Copyright 1995 Alexandre Julliard
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <unistd.h>
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#include "wine/winbase16.h"
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#include "ntddk.h"
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#include "callback.h"
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#include "drive.h"
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#include "file.h"
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#include "global.h"
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#include "instance.h"
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#include "miscemu.h"
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#include "module.h"
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#include "neexe.h"
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#include "process.h"
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#include "queue.h"
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#include "selectors.h"
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#include "stackframe.h"
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#include "task.h"
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#include "thread.h"
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#include "toolhelp.h"
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#include "winnt.h"
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#include "winsock.h"
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#include "syslevel.h"
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#include "debugtools.h"
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#include "services.h"
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#include "server.h"
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DEFAULT_DEBUG_CHANNEL(task);
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DECLARE_DEBUG_CHANNEL(relay);
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DECLARE_DEBUG_CHANNEL(toolhelp);
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/* Min. number of thunks allocated when creating a new segment */
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#define MIN_THUNKS 32
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static THHOOK DefaultThhook;
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THHOOK *pThhook = &DefaultThhook;
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#define hCurrentTask (pThhook->CurTDB)
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#define hFirstTask (pThhook->HeadTDB)
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#define hLockedTask (pThhook->LockTDB)
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static UINT16 nTaskCount = 0;
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static HTASK initial_task;
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/***********************************************************************
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* TASK_InstallTHHook
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*/
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void TASK_InstallTHHook( THHOOK *pNewThhook )
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{
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THHOOK *pOldThhook = pThhook;
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pThhook = pNewThhook? pNewThhook : &DefaultThhook;
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*pThhook = *pOldThhook;
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}
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/***********************************************************************
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* TASK_GetNextTask
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*/
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HTASK16 TASK_GetNextTask( HTASK16 hTask )
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{
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TDB* pTask = (TDB*)GlobalLock16(hTask);
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if (pTask->hNext) return pTask->hNext;
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return (hFirstTask != hTask) ? hFirstTask : 0;
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}
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/***********************************************************************
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* TASK_LinkTask
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*/
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static void TASK_LinkTask( HTASK16 hTask )
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{
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HTASK16 *prevTask;
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TDB *pTask;
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if (!(pTask = (TDB *)GlobalLock16( hTask ))) return;
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prevTask = &hFirstTask;
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while (*prevTask)
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{
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TDB *prevTaskPtr = (TDB *)GlobalLock16( *prevTask );
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if (prevTaskPtr->priority >= pTask->priority) break;
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prevTask = &prevTaskPtr->hNext;
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}
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pTask->hNext = *prevTask;
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*prevTask = hTask;
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nTaskCount++;
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}
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/***********************************************************************
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* TASK_UnlinkTask
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*/
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static void TASK_UnlinkTask( HTASK16 hTask )
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{
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HTASK16 *prevTask;
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TDB *pTask;
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prevTask = &hFirstTask;
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while (*prevTask && (*prevTask != hTask))
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{
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pTask = (TDB *)GlobalLock16( *prevTask );
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prevTask = &pTask->hNext;
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}
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if (*prevTask)
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{
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pTask = (TDB *)GlobalLock16( *prevTask );
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*prevTask = pTask->hNext;
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pTask->hNext = 0;
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nTaskCount--;
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}
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}
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/***********************************************************************
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* TASK_CreateThunks
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*
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* Create a thunk free-list in segment 'handle', starting from offset 'offset'
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* and containing 'count' entries.
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*/
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static void TASK_CreateThunks( HGLOBAL16 handle, WORD offset, WORD count )
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{
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int i;
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WORD free;
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THUNKS *pThunk;
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pThunk = (THUNKS *)((BYTE *)GlobalLock16( handle ) + offset);
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pThunk->next = 0;
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pThunk->magic = THUNK_MAGIC;
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pThunk->free = (int)&pThunk->thunks - (int)pThunk;
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free = pThunk->free;
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for (i = 0; i < count-1; i++)
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{
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free += 8; /* Offset of next thunk */
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pThunk->thunks[4*i] = free;
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}
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pThunk->thunks[4*i] = 0; /* Last thunk */
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}
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/***********************************************************************
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* TASK_AllocThunk
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*
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* Allocate a thunk for MakeProcInstance().
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*/
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static SEGPTR TASK_AllocThunk( HTASK16 hTask )
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{
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TDB *pTask;
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THUNKS *pThunk;
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WORD sel, base;
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if (!(pTask = (TDB *)GlobalLock16( hTask ))) return 0;
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sel = pTask->hCSAlias;
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pThunk = &pTask->thunks;
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base = (int)pThunk - (int)pTask;
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while (!pThunk->free)
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{
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sel = pThunk->next;
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if (!sel) /* Allocate a new segment */
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{
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sel = GLOBAL_Alloc( GMEM_FIXED, sizeof(THUNKS) + (MIN_THUNKS-1)*8,
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pTask->hPDB, WINE_LDT_FLAGS_CODE );
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if (!sel) return (SEGPTR)0;
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TASK_CreateThunks( sel, 0, MIN_THUNKS );
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pThunk->next = sel;
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}
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pThunk = (THUNKS *)GlobalLock16( sel );
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base = 0;
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}
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base += pThunk->free;
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pThunk->free = *(WORD *)((BYTE *)pThunk + pThunk->free);
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return PTR_SEG_OFF_TO_SEGPTR( sel, base );
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}
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/***********************************************************************
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* TASK_FreeThunk
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*
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* Free a MakeProcInstance() thunk.
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*/
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static BOOL TASK_FreeThunk( HTASK16 hTask, SEGPTR thunk )
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{
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TDB *pTask;
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THUNKS *pThunk;
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WORD sel, base;
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if (!(pTask = (TDB *)GlobalLock16( hTask ))) return 0;
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sel = pTask->hCSAlias;
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pThunk = &pTask->thunks;
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base = (int)pThunk - (int)pTask;
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while (sel && (sel != HIWORD(thunk)))
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{
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sel = pThunk->next;
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pThunk = (THUNKS *)GlobalLock16( sel );
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base = 0;
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}
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if (!sel) return FALSE;
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*(WORD *)((BYTE *)pThunk + LOWORD(thunk) - base) = pThunk->free;
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pThunk->free = LOWORD(thunk) - base;
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return TRUE;
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}
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/***********************************************************************
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* TASK_Create
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*
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* NOTE: This routine might be called by a Win32 thread. Thus, we need
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* to be careful to protect global data structures. We do this
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* by entering the Win16Lock while linking the task into the
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* global task list.
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*/
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BOOL TASK_Create( NE_MODULE *pModule, UINT16 cmdShow, TEB *teb, LPCSTR cmdline, BYTE len )
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{
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HTASK16 hTask;
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TDB *pTask;
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char name[10];
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/* Allocate the task structure */
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hTask = GLOBAL_Alloc( GMEM_FIXED | GMEM_ZEROINIT, sizeof(TDB),
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pModule->self, WINE_LDT_FLAGS_DATA );
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if (!hTask) return FALSE;
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pTask = (TDB *)GlobalLock16( hTask );
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/* Fill the task structure */
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pTask->hSelf = hTask;
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if (teb->tibflags & TEBF_WIN32)
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{
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pTask->flags |= TDBF_WIN32;
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pTask->hInstance = pModule->self;
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pTask->hPrevInstance = 0;
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/* NOTE: for 16-bit tasks, the instance handles are updated later on
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in NE_InitProcess */
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}
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pTask->version = pModule->expected_version;
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pTask->hModule = pModule->self;
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pTask->hParent = GetCurrentTask();
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pTask->magic = TDB_MAGIC;
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pTask->nCmdShow = cmdShow;
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pTask->teb = teb;
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pTask->curdrive = DRIVE_GetCurrentDrive() | 0x80;
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strcpy( pTask->curdir, "\\" );
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lstrcpynA( pTask->curdir + 1, DRIVE_GetDosCwd( DRIVE_GetCurrentDrive() ),
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sizeof(pTask->curdir) - 1 );
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/* Create the thunks block */
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TASK_CreateThunks( hTask, (int)&pTask->thunks - (int)pTask, 7 );
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/* Copy the module name */
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GetModuleName16( pModule->self, name, sizeof(name) );
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strncpy( pTask->module_name, name, sizeof(pTask->module_name) );
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/* Allocate a selector for the PDB */
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pTask->hPDB = GLOBAL_CreateBlock( GMEM_FIXED, &pTask->pdb, sizeof(PDB16),
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pModule->self, WINE_LDT_FLAGS_DATA );
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/* Fill the PDB */
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pTask->pdb.int20 = 0x20cd;
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pTask->pdb.dispatcher[0] = 0x9a; /* ljmp */
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PUT_DWORD(&pTask->pdb.dispatcher[1], (DWORD)NE_GetEntryPoint(
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GetModuleHandle16("KERNEL"), 102 )); /* KERNEL.102 is DOS3Call() */
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pTask->pdb.savedint22 = INT_GetPMHandler( 0x22 );
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pTask->pdb.savedint23 = INT_GetPMHandler( 0x23 );
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pTask->pdb.savedint24 = INT_GetPMHandler( 0x24 );
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pTask->pdb.fileHandlesPtr =
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PTR_SEG_OFF_TO_SEGPTR( GlobalHandleToSel16(pTask->hPDB),
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(int)&((PDB16 *)0)->fileHandles );
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pTask->pdb.hFileHandles = 0;
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memset( pTask->pdb.fileHandles, 0xff, sizeof(pTask->pdb.fileHandles) );
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pTask->pdb.environment = current_envdb.env_sel;
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pTask->pdb.nbFiles = 20;
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/* Fill the command line */
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if (!cmdline)
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{
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cmdline = current_envdb.cmd_line;
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/* remove the first word (program name) */
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if (*cmdline == '"')
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if (!(cmdline = strchr( cmdline+1, '"' ))) cmdline = current_envdb.cmd_line;
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while (*cmdline && (*cmdline != ' ') && (*cmdline != '\t')) cmdline++;
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while ((*cmdline == ' ') || (*cmdline == '\t')) cmdline++;
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len = strlen(cmdline);
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}
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if (len >= sizeof(pTask->pdb.cmdLine)) len = sizeof(pTask->pdb.cmdLine)-1;
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pTask->pdb.cmdLine[0] = len;
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memcpy( pTask->pdb.cmdLine + 1, cmdline, len );
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/* pTask->pdb.cmdLine[len+1] = 0; */
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TRACE("module='%s' cmdline='%.*s' task=%04x\n", name, len, cmdline, hTask );
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/* Get the compatibility flags */
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pTask->compat_flags = GetProfileIntA( "Compatibility", name, 0 );
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/* Allocate a code segment alias for the TDB */
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pTask->hCSAlias = GLOBAL_CreateBlock( GMEM_FIXED, (void *)pTask,
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sizeof(TDB), pTask->hPDB, WINE_LDT_FLAGS_CODE );
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/* Set the owner of the environment block */
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FarSetOwner16( pTask->pdb.environment, pTask->hPDB );
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/* Default DTA overwrites command line */
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pTask->dta = PTR_SEG_OFF_TO_SEGPTR( pTask->hPDB,
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(int)&pTask->pdb.cmdLine - (int)&pTask->pdb );
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/* Create scheduler event for 16-bit tasks */
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if ( !(pTask->flags & TDBF_WIN32) )
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NtCreateEvent( &pTask->hEvent, EVENT_ALL_ACCESS, NULL, TRUE, FALSE );
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/* Enter task handle into thread and process */
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teb->htask16 = hTask;
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if (!initial_task) initial_task = hTask;
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/* Add the task to the linked list */
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SYSLEVEL_EnterWin16Lock();
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TASK_LinkTask( hTask );
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SYSLEVEL_LeaveWin16Lock();
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return TRUE;
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}
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/***********************************************************************
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* TASK_DeleteTask
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*/
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static void TASK_DeleteTask( HTASK16 hTask )
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{
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TDB *pTask;
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HGLOBAL16 hPDB;
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if (!(pTask = (TDB *)GlobalLock16( hTask ))) return;
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hPDB = pTask->hPDB;
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pTask->magic = 0xdead; /* invalidate signature */
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/* Free the selector aliases */
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GLOBAL_FreeBlock( pTask->hCSAlias );
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GLOBAL_FreeBlock( pTask->hPDB );
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/* Free the task module */
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FreeModule16( pTask->hModule );
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/* Free the task structure itself */
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GlobalFree16( hTask );
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/* Free all memory used by this task (including the 32-bit stack, */
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/* the environment block and the thunk segments). */
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GlobalFreeAll16( hPDB );
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}
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/***********************************************************************
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* TASK_KillTask
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*/
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void TASK_ExitTask(void)
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{
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TDB *pTask;
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DWORD lockCount;
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/* Enter the Win16Lock to protect global data structures */
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SYSLEVEL_EnterWin16Lock();
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pTask = (TDB *)GlobalLock16( GetCurrentTask() );
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if ( !pTask )
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{
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SYSLEVEL_LeaveWin16Lock();
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return;
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}
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TRACE("Killing task %04x\n", pTask->hSelf );
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/* Perform USER cleanup */
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TASK_CallTaskSignalProc( USIG16_TERMINATION, pTask->hSelf );
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PROCESS_CallUserSignalProc( USIG_PROCESS_EXIT, 0 );
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PROCESS_CallUserSignalProc( USIG_THREAD_EXIT, 0 );
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PROCESS_CallUserSignalProc( USIG_PROCESS_DESTROY, 0 );
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/* Remove the task from the list to be sure we never switch back to it */
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TASK_UnlinkTask( pTask->hSelf );
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if (!nTaskCount || (nTaskCount == 1 && hFirstTask == initial_task))
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{
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TRACE("this is the last task, exiting\n" );
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ExitKernel16();
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}
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if( nTaskCount )
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{
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TDB* p = (TDB *)GlobalLock16( hFirstTask );
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while( p )
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{
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if( p->hYieldTo == pTask->hSelf ) p->hYieldTo = 0;
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p = (TDB *)GlobalLock16( p->hNext );
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}
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}
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pTask->nEvents = 0;
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if ( hLockedTask == pTask->hSelf )
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hLockedTask = 0;
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TASK_DeleteTask( pTask->hSelf );
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/* ... schedule another one ... */
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TASK_Reschedule();
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/* ... and completely release the Win16Lock, just in case. */
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ReleaseThunkLock( &lockCount );
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}
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/***********************************************************************
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* TASK_Reschedule
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*
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* This is where all the magic of task-switching happens!
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*
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* 16-bit Windows performs non-preemptive (cooperative) multitasking.
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* This means that each 16-bit task runs until it voluntarily yields
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* control, at which point the scheduler gets active and selects the
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* next task to run.
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*
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* In Wine, all processes, even 16-bit ones, are scheduled preemptively
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* by the standard scheduler of the underlying OS. As many 16-bit apps
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* *rely* on the behaviour of the Windows scheduler, however, we have
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* to simulate that behaviour.
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*
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* This is achieved as follows: every 16-bit task is at time (except
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* during task creation and deletion) in one of two states: either it
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* is the one currently running, then the global variable hCurrentTask
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* contains its task handle, or it is not currently running, then it
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* is blocked on a special scheduler event, a global handle which
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* is stored in the task struct.
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*
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* When the current task yields control, this routine gets called. Its
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* purpose is to determine the next task to be active, signal the
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* scheduler event of that task, and then put the current task to sleep
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* waiting for *its* scheduler event to get signalled again.
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*
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* This routine can get called in a few other special situations as well:
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*
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* - On creation of a 16-bit task, the Unix process executing the task
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* calls TASK_Reschedule once it has completed its initialization.
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* At this point, the task needs to be blocked until its scheduler
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* event is signalled the first time (this will be done by the parent
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* process to get the task up and running).
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*
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* - When the task currently running terminates itself, this routine gets
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* called and has to schedule another task, *without* blocking the
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* terminating task.
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*
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* - When a 32-bit thread posts an event for a 16-bit task, it might be
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* the case that *no* 16-bit task is currently running. In this case
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* the task that has now an event pending is to be scheduled.
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*
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*/
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void TASK_Reschedule(void)
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{
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TDB *pOldTask = NULL, *pNewTask = NULL;
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HTASK16 hOldTask = 0, hNewTask = 0;
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enum { MODE_YIELD, MODE_SLEEP, MODE_WAKEUP } mode;
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DWORD lockCount;
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SYSLEVEL_EnterWin16Lock();
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/* Check what we need to do */
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hOldTask = GetCurrentTask();
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pOldTask = (TDB *)GlobalLock16( hOldTask );
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TRACE( "entered with hCurrentTask %04x by hTask %04x (pid %ld)\n",
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hCurrentTask, hOldTask, (long) getpid() );
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if ( pOldTask && THREAD_IsWin16( NtCurrentTeb() ) )
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{
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/* We are called by an active (non-deleted) 16-bit task */
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/* If we don't even have a current task, or else the current
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task has yielded, we'll need to schedule a new task and
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(possibly) put the calling task to sleep. Otherwise, we
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only block the caller. */
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if ( !hCurrentTask || hCurrentTask == hOldTask )
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mode = MODE_YIELD;
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else
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mode = MODE_SLEEP;
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}
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else
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{
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/* We are called by a deleted 16-bit task or a 32-bit thread */
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/* The only situation where we need to do something is if we
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|
now do not have a current task. Then, we'll need to wake up
|
|
some task that has events pending. */
|
|
|
|
if ( !hCurrentTask || hCurrentTask == hOldTask )
|
|
mode = MODE_WAKEUP;
|
|
else
|
|
{
|
|
/* nothing to do */
|
|
SYSLEVEL_LeaveWin16Lock();
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Find a task to yield to: check for DirectedYield() */
|
|
if ( mode == MODE_YIELD && pOldTask && pOldTask->hYieldTo )
|
|
{
|
|
hNewTask = pOldTask->hYieldTo;
|
|
pNewTask = (TDB *)GlobalLock16( hNewTask );
|
|
if( !pNewTask || !pNewTask->nEvents) hNewTask = 0;
|
|
pOldTask->hYieldTo = 0;
|
|
}
|
|
|
|
/* Find a task to yield to: check for pending events */
|
|
if ( (mode == MODE_YIELD || mode == MODE_WAKEUP) && !hNewTask )
|
|
{
|
|
hNewTask = hFirstTask;
|
|
while (hNewTask)
|
|
{
|
|
pNewTask = (TDB *)GlobalLock16( hNewTask );
|
|
|
|
TRACE( "\ttask = %04x, events = %i\n", hNewTask, pNewTask->nEvents );
|
|
|
|
if (pNewTask->nEvents) break;
|
|
hNewTask = pNewTask->hNext;
|
|
}
|
|
if (hLockedTask && (hNewTask != hLockedTask)) hNewTask = 0;
|
|
}
|
|
|
|
/* If we are still the task with highest priority, just return ... */
|
|
if ( mode == MODE_YIELD && hNewTask && hNewTask == hCurrentTask )
|
|
{
|
|
TRACE("returning to the current task (%04x)\n", hCurrentTask );
|
|
SYSLEVEL_LeaveWin16Lock();
|
|
|
|
/* Allow Win32 threads to thunk down even while a Win16 task is
|
|
in a tight PeekMessage() or Yield() loop ... */
|
|
ReleaseThunkLock( &lockCount );
|
|
RestoreThunkLock( lockCount );
|
|
return;
|
|
}
|
|
|
|
/* If no task to yield to found, suspend 16-bit scheduler ... */
|
|
if ( mode == MODE_YIELD && !hNewTask )
|
|
{
|
|
TRACE("No currently active task\n");
|
|
hCurrentTask = 0;
|
|
}
|
|
|
|
/* If we found a task to wake up, do it ... */
|
|
if ( (mode == MODE_YIELD || mode == MODE_WAKEUP) && hNewTask )
|
|
{
|
|
TRACE("Switching to task %04x (%.8s)\n",
|
|
hNewTask, pNewTask->module_name );
|
|
|
|
pNewTask->priority++;
|
|
TASK_UnlinkTask( hNewTask );
|
|
TASK_LinkTask( hNewTask );
|
|
pNewTask->priority--;
|
|
|
|
hCurrentTask = hNewTask;
|
|
NtSetEvent( pNewTask->hEvent, NULL );
|
|
|
|
/* This is set just in case some app reads it ... */
|
|
pNewTask->ss_sp = pNewTask->teb->cur_stack;
|
|
}
|
|
|
|
/* If we need to put the current task to sleep, do it ... */
|
|
if ( (mode == MODE_YIELD || mode == MODE_SLEEP) && hOldTask != hCurrentTask )
|
|
{
|
|
NtResetEvent( pOldTask->hEvent, NULL );
|
|
|
|
ReleaseThunkLock( &lockCount );
|
|
SYSLEVEL_CheckNotLevel( 1 );
|
|
WaitForSingleObject( pOldTask->hEvent, INFINITE );
|
|
RestoreThunkLock( lockCount );
|
|
}
|
|
|
|
SYSLEVEL_LeaveWin16Lock();
|
|
}
|
|
|
|
/***********************************************************************
|
|
* InitTask (KERNEL.91)
|
|
*
|
|
* Called by the application startup code.
|
|
*/
|
|
void WINAPI InitTask16( CONTEXT86 *context )
|
|
{
|
|
TDB *pTask;
|
|
INSTANCEDATA *pinstance;
|
|
SEGPTR ptr;
|
|
|
|
context->Eax = 0;
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return;
|
|
|
|
/* Note: we need to trust that BX/CX contain the stack/heap sizes,
|
|
as some apps, notably Visual Basic apps, *modify* the heap/stack
|
|
size of the instance data segment before calling InitTask() */
|
|
|
|
/* Initialize the INSTANCEDATA structure */
|
|
pinstance = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN(CURRENT_DS, 0);
|
|
pinstance->stackmin = OFFSETOF( pTask->teb->cur_stack ) + sizeof( STACK16FRAME );
|
|
pinstance->stackbottom = pinstance->stackmin; /* yup, that's right. Confused me too. */
|
|
pinstance->stacktop = ( pinstance->stackmin > LOWORD(context->Ebx) ?
|
|
pinstance->stackmin - LOWORD(context->Ebx) : 0 ) + 150;
|
|
|
|
/* Initialize the local heap */
|
|
if (LOWORD(context->Ecx))
|
|
LocalInit16( GlobalHandleToSel16(pTask->hInstance), 0, LOWORD(context->Ecx) );
|
|
|
|
/* Initialize implicitly loaded DLLs */
|
|
NE_InitializeDLLs( pTask->hModule );
|
|
NE_DllProcessAttach( pTask->hModule );
|
|
|
|
/* Registers on return are:
|
|
* ax 1 if OK, 0 on error
|
|
* cx stack limit in bytes
|
|
* dx cmdShow parameter
|
|
* si instance handle of the previous instance
|
|
* di instance handle of the new task
|
|
* es:bx pointer to command line inside PSP
|
|
*
|
|
* 0 (=%bp) is pushed on the stack
|
|
*/
|
|
ptr = stack16_push( sizeof(WORD) );
|
|
*(WORD *)PTR_SEG_TO_LIN(ptr) = 0;
|
|
context->Esp -= 2;
|
|
|
|
context->Eax = 1;
|
|
|
|
if (!pTask->pdb.cmdLine[0]) context->Ebx = 0x80;
|
|
else
|
|
{
|
|
LPBYTE p = &pTask->pdb.cmdLine[1];
|
|
while ((*p == ' ') || (*p == '\t')) p++;
|
|
context->Ebx = 0x80 + (p - pTask->pdb.cmdLine);
|
|
}
|
|
context->Ecx = pinstance->stacktop;
|
|
context->Edx = pTask->nCmdShow;
|
|
context->Esi = (DWORD)pTask->hPrevInstance;
|
|
context->Edi = (DWORD)pTask->hInstance;
|
|
context->SegEs = (WORD)pTask->hPDB;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* WaitEvent (KERNEL.30)
|
|
*/
|
|
BOOL16 WINAPI WaitEvent16( HTASK16 hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!hTask) hTask = GetCurrentTask();
|
|
pTask = (TDB *)GlobalLock16( hTask );
|
|
|
|
if ( !THREAD_IsWin16( NtCurrentTeb() ) )
|
|
{
|
|
FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel);
|
|
return TRUE;
|
|
}
|
|
|
|
if (pTask->nEvents > 0)
|
|
{
|
|
pTask->nEvents--;
|
|
return FALSE;
|
|
}
|
|
TASK_Reschedule();
|
|
|
|
/* When we get back here, we have an event */
|
|
|
|
if (pTask->nEvents > 0) pTask->nEvents--;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* PostEvent (KERNEL.31)
|
|
*/
|
|
void WINAPI PostEvent16( HTASK16 hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!hTask) hTask = GetCurrentTask();
|
|
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return;
|
|
|
|
if ( !THREAD_IsWin16( pTask->teb ) )
|
|
{
|
|
FIXME("called for Win32 thread (%04x)!\n", pTask->teb->teb_sel );
|
|
return;
|
|
}
|
|
|
|
pTask->nEvents++;
|
|
|
|
/* If we are a 32-bit task, we might need to wake up the 16-bit scheduler */
|
|
if ( !THREAD_IsWin16( NtCurrentTeb() ) )
|
|
TASK_Reschedule();
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SetPriority (KERNEL.32)
|
|
*/
|
|
void WINAPI SetPriority16( HTASK16 hTask, INT16 delta )
|
|
{
|
|
TDB *pTask;
|
|
INT16 newpriority;
|
|
|
|
if (!hTask) hTask = GetCurrentTask();
|
|
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return;
|
|
newpriority = pTask->priority + delta;
|
|
if (newpriority < -32) newpriority = -32;
|
|
else if (newpriority > 15) newpriority = 15;
|
|
|
|
pTask->priority = newpriority + 1;
|
|
TASK_UnlinkTask( hTask );
|
|
TASK_LinkTask( hTask );
|
|
pTask->priority--;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LockCurrentTask (KERNEL.33)
|
|
*/
|
|
HTASK16 WINAPI LockCurrentTask16( BOOL16 bLock )
|
|
{
|
|
if (bLock) hLockedTask = GetCurrentTask();
|
|
else hLockedTask = 0;
|
|
return hLockedTask;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsTaskLocked (KERNEL.122)
|
|
*/
|
|
HTASK16 WINAPI IsTaskLocked16(void)
|
|
{
|
|
return hLockedTask;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* OldYield (KERNEL.117)
|
|
*/
|
|
void WINAPI OldYield16(void)
|
|
{
|
|
TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
|
|
|
|
if ( !THREAD_IsWin16( NtCurrentTeb() ) )
|
|
{
|
|
FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel);
|
|
return;
|
|
}
|
|
|
|
if (pCurTask) pCurTask->nEvents++; /* Make sure we get back here */
|
|
TASK_Reschedule();
|
|
if (pCurTask) pCurTask->nEvents--;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* WIN32_OldYield16 (KERNEL.447)
|
|
*/
|
|
void WINAPI WIN32_OldYield16(void)
|
|
{
|
|
DWORD count;
|
|
|
|
ReleaseThunkLock(&count);
|
|
RestoreThunkLock(count);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* DirectedYield (KERNEL.150)
|
|
*/
|
|
void WINAPI DirectedYield16( HTASK16 hTask )
|
|
{
|
|
TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
|
|
|
|
if ( !THREAD_IsWin16( NtCurrentTeb() ) )
|
|
{
|
|
FIXME("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel);
|
|
return;
|
|
}
|
|
|
|
TRACE("%04x: DirectedYield(%04x)\n", pCurTask->hSelf, hTask );
|
|
|
|
pCurTask->hYieldTo = hTask;
|
|
OldYield16();
|
|
|
|
TRACE("%04x: back from DirectedYield(%04x)\n", pCurTask->hSelf, hTask );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* Yield16 (KERNEL.29)
|
|
*/
|
|
void WINAPI Yield16(void)
|
|
{
|
|
TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
|
|
|
|
if (pCurTask) pCurTask->hYieldTo = 0;
|
|
if (pCurTask && pCurTask->hQueue && Callout.UserYield16) Callout.UserYield16();
|
|
else OldYield16();
|
|
}
|
|
|
|
/***********************************************************************
|
|
* KERNEL_490 (KERNEL.490)
|
|
*/
|
|
HTASK16 WINAPI KERNEL_490( HTASK16 someTask )
|
|
{
|
|
if ( !someTask ) return 0;
|
|
|
|
FIXME("(%04x): stub\n", someTask );
|
|
return 0;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* MakeProcInstance16 (KERNEL.51)
|
|
*/
|
|
FARPROC16 WINAPI MakeProcInstance16( FARPROC16 func, HANDLE16 hInstance )
|
|
{
|
|
BYTE *thunk,*lfunc;
|
|
SEGPTR thunkaddr;
|
|
WORD hInstanceSelector;
|
|
|
|
hInstanceSelector = GlobalHandleToSel16(hInstance);
|
|
|
|
TRACE("(%08lx, %04x);\n", (DWORD)func, hInstance);
|
|
|
|
if (!HIWORD(func)) {
|
|
/* Win95 actually protects via SEH, but this is better for debugging */
|
|
WARN("Ouch ! Called with invalid func 0x%08lx !\n", (DWORD)func);
|
|
return (FARPROC16)0;
|
|
}
|
|
|
|
if (hInstance)
|
|
{
|
|
if ( (!(hInstance & 4)) ||
|
|
((hInstance != 0xffff) && IS_SELECTOR_FREE(hInstance|7)) )
|
|
{
|
|
WARN("Invalid hInstance (%04x) passed to MakeProcInstance !\n",
|
|
hInstance);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if ( (GlobalHandleToSel16(CURRENT_DS) != hInstanceSelector)
|
|
&& (hInstance != 0)
|
|
&& (hInstance != 0xffff) )
|
|
{
|
|
/* calling MPI with a foreign DSEG is invalid ! */
|
|
WARN("Problem with hInstance? Got %04x, using %04x instead\n",
|
|
hInstance,CURRENT_DS);
|
|
}
|
|
|
|
/* Always use the DSEG that MPI was entered with.
|
|
* We used to set hInstance to GetTaskDS16(), but this should be wrong
|
|
* as CURRENT_DS provides the DSEG value we need.
|
|
* ("calling" DS, *not* "task" DS !) */
|
|
hInstanceSelector = CURRENT_DS;
|
|
hInstance = GlobalHandle16(hInstanceSelector);
|
|
|
|
/* no thunking for DLLs */
|
|
if (NE_GetPtr(FarGetOwner16(hInstance))->flags & NE_FFLAGS_LIBMODULE)
|
|
return func;
|
|
|
|
thunkaddr = TASK_AllocThunk( GetCurrentTask() );
|
|
if (!thunkaddr) return (FARPROC16)0;
|
|
thunk = PTR_SEG_TO_LIN( thunkaddr );
|
|
lfunc = PTR_SEG_TO_LIN( func );
|
|
|
|
TRACE("(%08lx,%04x): got thunk %08lx\n",
|
|
(DWORD)func, hInstance, (DWORD)thunkaddr );
|
|
if (((lfunc[0]==0x8c) && (lfunc[1]==0xd8)) || /* movw %ds, %ax */
|
|
((lfunc[0]==0x1e) && (lfunc[1]==0x58)) /* pushw %ds, popw %ax */
|
|
) {
|
|
WARN("This was the (in)famous \"thunk useless\" warning. We thought we have to overwrite with nop;nop;, but this isn't true.\n");
|
|
}
|
|
|
|
*thunk++ = 0xb8; /* movw instance, %ax */
|
|
*thunk++ = (BYTE)(hInstanceSelector & 0xff);
|
|
*thunk++ = (BYTE)(hInstanceSelector >> 8);
|
|
*thunk++ = 0xea; /* ljmp func */
|
|
*(DWORD *)thunk = (DWORD)func;
|
|
return (FARPROC16)thunkaddr;
|
|
/* CX reg indicates if thunkaddr != NULL, implement if needed */
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* FreeProcInstance16 (KERNEL.52)
|
|
*/
|
|
void WINAPI FreeProcInstance16( FARPROC16 func )
|
|
{
|
|
TRACE("(%08lx)\n", (DWORD)func );
|
|
TASK_FreeThunk( GetCurrentTask(), (SEGPTR)func );
|
|
}
|
|
|
|
/**********************************************************************
|
|
* TASK_GetCodeSegment
|
|
*
|
|
* Helper function for GetCodeHandle/GetCodeInfo: Retrieve the module
|
|
* and logical segment number of a given code segment.
|
|
*
|
|
* 'proc' either *is* already a pair of module handle and segment number,
|
|
* in which case there's nothing to do. Otherwise, it is a pointer to
|
|
* a function, and we need to retrieve the code segment. If the pointer
|
|
* happens to point to a thunk, we'll retrieve info about the code segment
|
|
* where the function pointed to by the thunk resides, not the thunk itself.
|
|
*
|
|
* FIXME: if 'proc' is a SNOOP16 return stub, we should retrieve info about
|
|
* the function the snoop code will return to ...
|
|
*
|
|
*/
|
|
static BOOL TASK_GetCodeSegment( FARPROC16 proc, NE_MODULE **ppModule,
|
|
SEGTABLEENTRY **ppSeg, int *pSegNr )
|
|
{
|
|
NE_MODULE *pModule = NULL;
|
|
SEGTABLEENTRY *pSeg = NULL;
|
|
int segNr=0;
|
|
|
|
/* Try pair of module handle / segment number */
|
|
pModule = (NE_MODULE *) GlobalLock16( HIWORD( proc ) );
|
|
if ( pModule && pModule->magic == IMAGE_OS2_SIGNATURE )
|
|
{
|
|
segNr = LOWORD( proc );
|
|
if ( segNr && segNr <= pModule->seg_count )
|
|
pSeg = NE_SEG_TABLE( pModule ) + segNr-1;
|
|
}
|
|
|
|
/* Try thunk or function */
|
|
else
|
|
{
|
|
BYTE *thunk = (BYTE *)PTR_SEG_TO_LIN( proc );
|
|
WORD selector;
|
|
|
|
if ((thunk[0] == 0xb8) && (thunk[3] == 0xea))
|
|
selector = thunk[6] + (thunk[7] << 8);
|
|
else
|
|
selector = HIWORD( proc );
|
|
|
|
pModule = NE_GetPtr( GlobalHandle16( selector ) );
|
|
pSeg = pModule? NE_SEG_TABLE( pModule ) : NULL;
|
|
|
|
if ( pModule )
|
|
for ( segNr = 1; segNr <= pModule->seg_count; segNr++, pSeg++ )
|
|
if ( GlobalHandleToSel16(pSeg->hSeg) == selector )
|
|
break;
|
|
|
|
if ( pModule && segNr > pModule->seg_count )
|
|
pSeg = NULL;
|
|
}
|
|
|
|
/* Abort if segment not found */
|
|
|
|
if ( !pModule || !pSeg )
|
|
return FALSE;
|
|
|
|
/* Return segment data */
|
|
|
|
if ( ppModule ) *ppModule = pModule;
|
|
if ( ppSeg ) *ppSeg = pSeg;
|
|
if ( pSegNr ) *pSegNr = segNr;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* GetCodeHandle (KERNEL.93)
|
|
*/
|
|
HANDLE16 WINAPI GetCodeHandle16( FARPROC16 proc )
|
|
{
|
|
SEGTABLEENTRY *pSeg;
|
|
|
|
if ( !TASK_GetCodeSegment( proc, NULL, &pSeg, NULL ) )
|
|
return (HANDLE16)0;
|
|
|
|
return pSeg->hSeg;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* GetCodeInfo (KERNEL.104)
|
|
*/
|
|
BOOL16 WINAPI GetCodeInfo16( FARPROC16 proc, SEGINFO *segInfo )
|
|
{
|
|
NE_MODULE *pModule;
|
|
SEGTABLEENTRY *pSeg;
|
|
int segNr;
|
|
|
|
if ( !TASK_GetCodeSegment( proc, &pModule, &pSeg, &segNr ) )
|
|
return FALSE;
|
|
|
|
/* Fill in segment information */
|
|
|
|
segInfo->offSegment = pSeg->filepos;
|
|
segInfo->cbSegment = pSeg->size;
|
|
segInfo->flags = pSeg->flags;
|
|
segInfo->cbAlloc = pSeg->minsize;
|
|
segInfo->h = pSeg->hSeg;
|
|
segInfo->alignShift = pModule->alignment;
|
|
|
|
if ( segNr == pModule->dgroup )
|
|
segInfo->cbAlloc += pModule->heap_size + pModule->stack_size;
|
|
|
|
/* Return module handle in %es */
|
|
|
|
CURRENT_STACK16->es = GlobalHandleToSel16( pModule->self );
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* DefineHandleTable16 (KERNEL.94)
|
|
*/
|
|
BOOL16 WINAPI DefineHandleTable16( WORD wOffset )
|
|
{
|
|
FIXME("(%04x): stub ?\n", wOffset);
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SetTaskQueue (KERNEL.34)
|
|
*/
|
|
HQUEUE16 WINAPI SetTaskQueue16( HTASK16 hTask, HQUEUE16 hQueue )
|
|
{
|
|
HQUEUE16 hPrev;
|
|
TDB *pTask;
|
|
|
|
if (!hTask) hTask = GetCurrentTask();
|
|
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return 0;
|
|
|
|
hPrev = pTask->hQueue;
|
|
pTask->hQueue = hQueue;
|
|
|
|
return hPrev;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetTaskQueue (KERNEL.35)
|
|
*/
|
|
HQUEUE16 WINAPI GetTaskQueue16( HTASK16 hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!hTask) hTask = GetCurrentTask();
|
|
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return 0;
|
|
return pTask->hQueue;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SetThreadQueue (KERNEL.463)
|
|
*/
|
|
HQUEUE16 WINAPI SetThreadQueue16( DWORD thread, HQUEUE16 hQueue )
|
|
{
|
|
TEB *teb = thread? THREAD_IdToTEB( thread ) : NtCurrentTeb();
|
|
HQUEUE16 oldQueue = teb? teb->queue : 0;
|
|
|
|
if ( teb )
|
|
{
|
|
teb->queue = hQueue;
|
|
|
|
if ( GetTaskQueue16( teb->htask16 ) == oldQueue )
|
|
SetTaskQueue16( teb->htask16, hQueue );
|
|
}
|
|
|
|
return oldQueue;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* GetThreadQueue (KERNEL.464)
|
|
*/
|
|
HQUEUE16 WINAPI GetThreadQueue16( DWORD thread )
|
|
{
|
|
TEB *teb = NULL;
|
|
if ( !thread )
|
|
teb = NtCurrentTeb();
|
|
else if ( HIWORD(thread) )
|
|
teb = THREAD_IdToTEB( thread );
|
|
else if ( IsTask16( (HTASK16)thread ) )
|
|
teb = ((TDB *)GlobalLock16( (HANDLE16)thread ))->teb;
|
|
|
|
return (HQUEUE16)(teb? teb->queue : 0);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SetFastQueue (KERNEL.624)
|
|
*/
|
|
VOID WINAPI SetFastQueue16( DWORD thread, HANDLE hQueue )
|
|
{
|
|
TEB *teb = NULL;
|
|
if ( !thread )
|
|
teb = NtCurrentTeb();
|
|
else if ( HIWORD(thread) )
|
|
teb = THREAD_IdToTEB( thread );
|
|
else if ( IsTask16( (HTASK16)thread ) )
|
|
teb = ((TDB *)GlobalLock16( (HANDLE16)thread ))->teb;
|
|
|
|
if ( teb ) teb->queue = (HQUEUE16) hQueue;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* GetFastQueue (KERNEL.625)
|
|
*/
|
|
HANDLE WINAPI GetFastQueue16( void )
|
|
{
|
|
TEB *teb = NtCurrentTeb();
|
|
if (!teb) return 0;
|
|
|
|
if (!teb->queue && Callout.InitThreadInput16)
|
|
Callout.InitThreadInput16( 0, THREAD_IsWin16(teb)? 4 : 5 );
|
|
|
|
if (!teb->queue)
|
|
FIXME("(): should initialize thread-local queue, expect failure!\n" );
|
|
|
|
return (HANDLE)teb->queue;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SwitchStackTo (KERNEL.108)
|
|
*/
|
|
void WINAPI SwitchStackTo16( WORD seg, WORD ptr, WORD top )
|
|
{
|
|
TDB *pTask;
|
|
STACK16FRAME *oldFrame, *newFrame;
|
|
INSTANCEDATA *pData;
|
|
UINT16 copySize;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return;
|
|
if (!(pData = (INSTANCEDATA *)GlobalLock16( seg ))) return;
|
|
TRACE("old=%04x:%04x new=%04x:%04x\n",
|
|
SELECTOROF( pTask->teb->cur_stack ),
|
|
OFFSETOF( pTask->teb->cur_stack ), seg, ptr );
|
|
|
|
/* Save the old stack */
|
|
|
|
oldFrame = THREAD_STACK16( pTask->teb );
|
|
/* pop frame + args and push bp */
|
|
pData->old_ss_sp = pTask->teb->cur_stack + sizeof(STACK16FRAME)
|
|
+ 2 * sizeof(WORD);
|
|
*(WORD *)PTR_SEG_TO_LIN(pData->old_ss_sp) = oldFrame->bp;
|
|
pData->stacktop = top;
|
|
pData->stackmin = ptr;
|
|
pData->stackbottom = ptr;
|
|
|
|
/* Switch to the new stack */
|
|
|
|
/* Note: we need to take the 3 arguments into account; otherwise,
|
|
* the stack will underflow upon return from this function.
|
|
*/
|
|
copySize = oldFrame->bp - OFFSETOF(pData->old_ss_sp);
|
|
copySize += 3 * sizeof(WORD) + sizeof(STACK16FRAME);
|
|
pTask->teb->cur_stack = PTR_SEG_OFF_TO_SEGPTR( seg, ptr - copySize );
|
|
newFrame = THREAD_STACK16( pTask->teb );
|
|
|
|
/* Copy the stack frame and the local variables to the new stack */
|
|
|
|
memmove( newFrame, oldFrame, copySize );
|
|
newFrame->bp = ptr;
|
|
*(WORD *)PTR_SEG_OFF_TO_LIN( seg, ptr ) = 0; /* clear previous bp */
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SwitchStackBack (KERNEL.109)
|
|
*/
|
|
void WINAPI SwitchStackBack16( CONTEXT86 *context )
|
|
{
|
|
STACK16FRAME *oldFrame, *newFrame;
|
|
INSTANCEDATA *pData;
|
|
|
|
if (!(pData = (INSTANCEDATA *)GlobalLock16(SELECTOROF(NtCurrentTeb()->cur_stack))))
|
|
return;
|
|
if (!pData->old_ss_sp)
|
|
{
|
|
WARN("No previous SwitchStackTo\n" );
|
|
return;
|
|
}
|
|
TRACE("restoring stack %04x:%04x\n",
|
|
SELECTOROF(pData->old_ss_sp), OFFSETOF(pData->old_ss_sp) );
|
|
|
|
oldFrame = CURRENT_STACK16;
|
|
|
|
/* Pop bp from the previous stack */
|
|
|
|
BP_reg(context) = *(WORD *)PTR_SEG_TO_LIN(pData->old_ss_sp);
|
|
pData->old_ss_sp += sizeof(WORD);
|
|
|
|
/* Switch back to the old stack */
|
|
|
|
NtCurrentTeb()->cur_stack = pData->old_ss_sp - sizeof(STACK16FRAME);
|
|
context->SegSs = SELECTOROF(pData->old_ss_sp);
|
|
context->Esp = OFFSETOF(pData->old_ss_sp) - sizeof(DWORD); /*ret addr*/
|
|
pData->old_ss_sp = 0;
|
|
|
|
/* Build a stack frame for the return */
|
|
|
|
newFrame = CURRENT_STACK16;
|
|
newFrame->frame32 = oldFrame->frame32;
|
|
newFrame->module_cs = oldFrame->module_cs;
|
|
newFrame->callfrom_ip = oldFrame->callfrom_ip;
|
|
newFrame->entry_ip = oldFrame->entry_ip;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetTaskQueueDS16 (KERNEL.118)
|
|
*/
|
|
void WINAPI GetTaskQueueDS16(void)
|
|
{
|
|
CURRENT_STACK16->ds = GlobalHandleToSel16( GetTaskQueue16(0) );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetTaskQueueES16 (KERNEL.119)
|
|
*/
|
|
void WINAPI GetTaskQueueES16(void)
|
|
{
|
|
CURRENT_STACK16->es = GlobalHandleToSel16( GetTaskQueue16(0) );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetCurrentTask (KERNEL.36)
|
|
*/
|
|
HTASK16 WINAPI GetCurrentTask(void)
|
|
{
|
|
return NtCurrentTeb()->htask16;
|
|
}
|
|
|
|
DWORD WINAPI WIN16_GetCurrentTask(void)
|
|
{
|
|
/* This is the version used by relay code; the first task is */
|
|
/* returned in the high word of the result */
|
|
return MAKELONG( GetCurrentTask(), hFirstTask );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetCurrentPDB (KERNEL.37)
|
|
*
|
|
* UNDOC: returns PSP of KERNEL in high word
|
|
*/
|
|
DWORD WINAPI GetCurrentPDB16(void)
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
|
|
return MAKELONG(pTask->hPDB, 0); /* FIXME */
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetCurPID16 (KERNEL.157)
|
|
*/
|
|
DWORD WINAPI GetCurPID16( DWORD unused )
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetInstanceData (KERNEL.54)
|
|
*/
|
|
INT16 WINAPI GetInstanceData16( HINSTANCE16 instance, WORD buffer, INT16 len )
|
|
{
|
|
char *ptr = (char *)GlobalLock16( instance );
|
|
if (!ptr || !len) return 0;
|
|
if ((int)buffer + len >= 0x10000) len = 0x10000 - buffer;
|
|
memcpy( (char *)GlobalLock16(CURRENT_DS) + buffer, ptr + buffer, len );
|
|
return len;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetExeVersion (KERNEL.105)
|
|
*/
|
|
WORD WINAPI GetExeVersion16(void)
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
|
|
return pTask->version;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SetErrorMode16 (KERNEL.107)
|
|
*/
|
|
UINT16 WINAPI SetErrorMode16( UINT16 mode )
|
|
{
|
|
TDB *pTask;
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
|
|
pTask->error_mode = mode;
|
|
return SetErrorMode( mode );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetDOSEnvironment (KERNEL.131)
|
|
*/
|
|
SEGPTR WINAPI GetDOSEnvironment16(void)
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
|
|
return PTR_SEG_OFF_TO_SEGPTR( pTask->pdb.environment, 0 );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetNumTasks (KERNEL.152)
|
|
*/
|
|
UINT16 WINAPI GetNumTasks16(void)
|
|
{
|
|
return nTaskCount;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetTaskDS (KERNEL.155)
|
|
*
|
|
* Note: this function apparently returns a DWORD with LOWORD == HIWORD.
|
|
* I don't think we need to bother with this.
|
|
*/
|
|
HINSTANCE16 WINAPI GetTaskDS16(void)
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
|
|
return GlobalHandleToSel16(pTask->hInstance);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* GetDummyModuleHandleDS (KERNEL.602)
|
|
*/
|
|
WORD WINAPI GetDummyModuleHandleDS16(void)
|
|
{
|
|
TDB *pTask;
|
|
WORD selector;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
|
|
if (!(pTask->flags & TDBF_WIN32)) return 0;
|
|
selector = GlobalHandleToSel16( pTask->hModule );
|
|
CURRENT_DS = selector;
|
|
return selector;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* IsTask (KERNEL.320)
|
|
*/
|
|
BOOL16 WINAPI IsTask16( HTASK16 hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return FALSE;
|
|
if (GlobalSize16( hTask ) < sizeof(TDB)) return FALSE;
|
|
return (pTask->magic == TDB_MAGIC);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsWinOldApTask16 (KERNEL.158)
|
|
*/
|
|
BOOL16 WINAPI IsWinOldApTask16( HTASK16 hTask )
|
|
{
|
|
/* should return bit 0 of byte 0x48 in PSP */
|
|
return FALSE;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SetTaskSignalProc (KERNEL.38)
|
|
*/
|
|
FARPROC16 WINAPI SetTaskSignalProc( HTASK16 hTask, FARPROC16 proc )
|
|
{
|
|
TDB *pTask;
|
|
FARPROC16 oldProc;
|
|
|
|
if (!hTask) hTask = GetCurrentTask();
|
|
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return NULL;
|
|
oldProc = pTask->userhandler;
|
|
pTask->userhandler = proc;
|
|
return oldProc;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* TASK_CallTaskSignalProc
|
|
*/
|
|
/* ### start build ### */
|
|
extern WORD CALLBACK TASK_CallTo16_word_wwwww(FARPROC16,WORD,WORD,WORD,WORD,WORD);
|
|
/* ### stop build ### */
|
|
void TASK_CallTaskSignalProc( UINT16 uCode, HANDLE16 hTaskOrModule )
|
|
{
|
|
TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
|
|
if ( !pTask || !pTask->userhandler ) return;
|
|
|
|
TASK_CallTo16_word_wwwww( pTask->userhandler,
|
|
hTaskOrModule, uCode, 0,
|
|
pTask->hInstance, pTask->hQueue );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SetSigHandler (KERNEL.140)
|
|
*/
|
|
WORD WINAPI SetSigHandler16( FARPROC16 newhandler, FARPROC16* oldhandler,
|
|
UINT16 *oldmode, UINT16 newmode, UINT16 flag )
|
|
{
|
|
FIXME("(%p,%p,%p,%d,%d), unimplemented.\n",
|
|
newhandler,oldhandler,oldmode,newmode,flag );
|
|
|
|
if (flag != 1) return 0;
|
|
if (!newmode) newhandler = NULL; /* Default handler */
|
|
if (newmode != 4)
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return 0;
|
|
if (oldmode) *oldmode = pTask->signal_flags;
|
|
pTask->signal_flags = newmode;
|
|
if (oldhandler) *oldhandler = pTask->sighandler;
|
|
pTask->sighandler = newhandler;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GlobalNotify (KERNEL.154)
|
|
*
|
|
* Note that GlobalNotify does _not_ return the old NotifyProc
|
|
* -- contrary to LocalNotify !!
|
|
*/
|
|
VOID WINAPI GlobalNotify16( FARPROC16 proc )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock16( GetCurrentTask() ))) return;
|
|
pTask->discardhandler = proc;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetExePtr (KERNEL.133)
|
|
*/
|
|
static inline HMODULE16 GetExePtrHelper( HANDLE16 handle, HTASK16 *hTask )
|
|
{
|
|
char *ptr;
|
|
HANDLE16 owner;
|
|
|
|
/* Check for module handle */
|
|
|
|
if (!(ptr = GlobalLock16( handle ))) return 0;
|
|
if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return handle;
|
|
|
|
/* Search for this handle inside all tasks */
|
|
|
|
*hTask = hFirstTask;
|
|
while (*hTask)
|
|
{
|
|
TDB *pTask = (TDB *)GlobalLock16( *hTask );
|
|
if ((*hTask == handle) ||
|
|
(pTask->hInstance == handle) ||
|
|
(pTask->hQueue == handle) ||
|
|
(pTask->hPDB == handle)) return pTask->hModule;
|
|
*hTask = pTask->hNext;
|
|
}
|
|
|
|
/* Check the owner for module handle */
|
|
|
|
owner = FarGetOwner16( handle );
|
|
if (!(ptr = GlobalLock16( owner ))) return 0;
|
|
if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return owner;
|
|
|
|
/* Search for the owner inside all tasks */
|
|
|
|
*hTask = hFirstTask;
|
|
while (*hTask)
|
|
{
|
|
TDB *pTask = (TDB *)GlobalLock16( *hTask );
|
|
if ((*hTask == owner) ||
|
|
(pTask->hInstance == owner) ||
|
|
(pTask->hQueue == owner) ||
|
|
(pTask->hPDB == owner)) return pTask->hModule;
|
|
*hTask = pTask->hNext;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
HMODULE16 WINAPI WIN16_GetExePtr( HANDLE16 handle )
|
|
{
|
|
HTASK16 hTask = 0;
|
|
HMODULE16 hModule = GetExePtrHelper( handle, &hTask );
|
|
STACK16FRAME *frame = CURRENT_STACK16;
|
|
frame->ecx = hModule;
|
|
if (hTask) frame->es = hTask;
|
|
return hModule;
|
|
}
|
|
|
|
HMODULE16 WINAPI GetExePtr( HANDLE16 handle )
|
|
{
|
|
HTASK16 hTask = 0;
|
|
return GetExePtrHelper( handle, &hTask );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* TaskFirst (TOOLHELP.63)
|
|
*/
|
|
BOOL16 WINAPI TaskFirst16( TASKENTRY *lpte )
|
|
{
|
|
lpte->hNext = hFirstTask;
|
|
return TaskNext16( lpte );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* TaskNext (TOOLHELP.64)
|
|
*/
|
|
BOOL16 WINAPI TaskNext16( TASKENTRY *lpte )
|
|
{
|
|
TDB *pTask;
|
|
INSTANCEDATA *pInstData;
|
|
|
|
TRACE_(toolhelp)("(%p): task=%04x\n", lpte, lpte->hNext );
|
|
if (!lpte->hNext) return FALSE;
|
|
|
|
/* make sure that task and hInstance are valid (skip initial Wine task !) */
|
|
while (1) {
|
|
pTask = (TDB *)GlobalLock16( lpte->hNext );
|
|
if (!pTask || pTask->magic != TDB_MAGIC) return FALSE;
|
|
if (pTask->hInstance)
|
|
break;
|
|
lpte->hNext = pTask->hNext;
|
|
}
|
|
pInstData = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN( GlobalHandleToSel16(pTask->hInstance), 0 );
|
|
lpte->hTask = lpte->hNext;
|
|
lpte->hTaskParent = pTask->hParent;
|
|
lpte->hInst = pTask->hInstance;
|
|
lpte->hModule = pTask->hModule;
|
|
lpte->wSS = SELECTOROF( pTask->teb->cur_stack );
|
|
lpte->wSP = OFFSETOF( pTask->teb->cur_stack );
|
|
lpte->wStackTop = pInstData->stacktop;
|
|
lpte->wStackMinimum = pInstData->stackmin;
|
|
lpte->wStackBottom = pInstData->stackbottom;
|
|
lpte->wcEvents = pTask->nEvents;
|
|
lpte->hQueue = pTask->hQueue;
|
|
lstrcpynA( lpte->szModule, pTask->module_name, sizeof(lpte->szModule) );
|
|
lpte->wPSPOffset = 0x100; /*??*/
|
|
lpte->hNext = pTask->hNext;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* TaskFindHandle (TOOLHELP.65)
|
|
*/
|
|
BOOL16 WINAPI TaskFindHandle16( TASKENTRY *lpte, HTASK16 hTask )
|
|
{
|
|
lpte->hNext = hTask;
|
|
return TaskNext16( lpte );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetAppCompatFlags16 (KERNEL.354)
|
|
*/
|
|
DWORD WINAPI GetAppCompatFlags16( HTASK16 hTask )
|
|
{
|
|
return GetAppCompatFlags( hTask );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetAppCompatFlags (USER32.206)
|
|
*/
|
|
DWORD WINAPI GetAppCompatFlags( HTASK hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!hTask) hTask = GetCurrentTask();
|
|
if (!(pTask=(TDB *)GlobalLock16( (HTASK16)hTask ))) return 0;
|
|
if (GlobalSize16(hTask) < sizeof(TDB)) return 0;
|
|
return pTask->compat_flags;
|
|
}
|