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Sweden-Number/loader/task.c

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/*
* Task functions
*
* Copyright 1995 Alexandre Julliard
*/
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>
#include "wine/winbase16.h"
#include "user.h"
#include "callback.h"
#include "drive.h"
#include "file.h"
#include "global.h"
#include "instance.h"
#include "message.h"
#include "miscemu.h"
#include "module.h"
#include "neexe.h"
#include "peexe.h"
#include "pe_image.h"
#include "process.h"
#include "queue.h"
#include "selectors.h"
#include "stackframe.h"
#include "task.h"
#include "thread.h"
#include "toolhelp.h"
#include "winnt.h"
#include "winsock.h"
#include "syslevel.h"
#include "debugtools.h"
#include "dosexe.h"
#include "services.h"
#include "server.h"
DECLARE_DEBUG_CHANNEL(relay)
DECLARE_DEBUG_CHANNEL(task)
DECLARE_DEBUG_CHANNEL(toolhelp)
/* Min. number of thunks allocated when creating a new segment */
#define MIN_THUNKS 32
/* Pointer to function to switch to a larger stack */
int (*IF1632_CallLargeStack)( int (*func)(), void *arg ) = NULL;
static THHOOK DefaultThhook = { 0 };
THHOOK *pThhook = &DefaultThhook;
#define hCurrentTask (pThhook->CurTDB)
#define hFirstTask (pThhook->HeadTDB)
#define hLockedTask (pThhook->LockTDB)
static UINT16 nTaskCount = 0;
/***********************************************************************
* TASK_InstallTHHook
*/
void TASK_InstallTHHook( THHOOK *pNewThhook )
{
THHOOK *pOldThhook = pThhook;
pThhook = pNewThhook? pNewThhook : &DefaultThhook;
*pThhook = *pOldThhook;
}
/***********************************************************************
* TASK_GetNextTask
*/
HTASK16 TASK_GetNextTask( HTASK16 hTask )
{
TDB* pTask = (TDB*)GlobalLock16(hTask);
if (pTask->hNext) return pTask->hNext;
return (hFirstTask != hTask) ? hFirstTask : 0;
}
/***********************************************************************
* TASK_LinkTask
*/
static void TASK_LinkTask( HTASK16 hTask )
{
HTASK16 *prevTask;
TDB *pTask;
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return;
prevTask = &hFirstTask;
while (*prevTask)
{
TDB *prevTaskPtr = (TDB *)GlobalLock16( *prevTask );
if (prevTaskPtr->priority >= pTask->priority) break;
prevTask = &prevTaskPtr->hNext;
}
pTask->hNext = *prevTask;
*prevTask = hTask;
nTaskCount++;
}
/***********************************************************************
* TASK_UnlinkTask
*/
static void TASK_UnlinkTask( HTASK16 hTask )
{
HTASK16 *prevTask;
TDB *pTask;
prevTask = &hFirstTask;
while (*prevTask && (*prevTask != hTask))
{
pTask = (TDB *)GlobalLock16( *prevTask );
prevTask = &pTask->hNext;
}
if (*prevTask)
{
pTask = (TDB *)GlobalLock16( *prevTask );
*prevTask = pTask->hNext;
pTask->hNext = 0;
nTaskCount--;
}
}
/***********************************************************************
* TASK_CreateThunks
*
* Create a thunk free-list in segment 'handle', starting from offset 'offset'
* and containing 'count' entries.
*/
static void TASK_CreateThunks( HGLOBAL16 handle, WORD offset, WORD count )
{
int i;
WORD free;
THUNKS *pThunk;
pThunk = (THUNKS *)((BYTE *)GlobalLock16( handle ) + offset);
pThunk->next = 0;
pThunk->magic = THUNK_MAGIC;
pThunk->free = (int)&pThunk->thunks - (int)pThunk;
free = pThunk->free;
for (i = 0; i < count-1; i++)
{
free += 8; /* Offset of next thunk */
pThunk->thunks[4*i] = free;
}
pThunk->thunks[4*i] = 0; /* Last thunk */
}
/***********************************************************************
* TASK_AllocThunk
*
* Allocate a thunk for MakeProcInstance().
*/
static SEGPTR TASK_AllocThunk( HTASK16 hTask )
{
TDB *pTask;
THUNKS *pThunk;
WORD sel, base;
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return 0;
sel = pTask->hCSAlias;
pThunk = &pTask->thunks;
base = (int)pThunk - (int)pTask;
while (!pThunk->free)
{
sel = pThunk->next;
if (!sel) /* Allocate a new segment */
{
sel = GLOBAL_Alloc( GMEM_FIXED, sizeof(THUNKS) + (MIN_THUNKS-1)*8,
pTask->hPDB, TRUE, FALSE, FALSE );
if (!sel) return (SEGPTR)0;
TASK_CreateThunks( sel, 0, MIN_THUNKS );
pThunk->next = sel;
}
pThunk = (THUNKS *)GlobalLock16( sel );
base = 0;
}
base += pThunk->free;
pThunk->free = *(WORD *)((BYTE *)pThunk + pThunk->free);
return PTR_SEG_OFF_TO_SEGPTR( sel, base );
}
/***********************************************************************
* TASK_FreeThunk
*
* Free a MakeProcInstance() thunk.
*/
static BOOL TASK_FreeThunk( HTASK16 hTask, SEGPTR thunk )
{
TDB *pTask;
THUNKS *pThunk;
WORD sel, base;
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return 0;
sel = pTask->hCSAlias;
pThunk = &pTask->thunks;
base = (int)pThunk - (int)pTask;
while (sel && (sel != HIWORD(thunk)))
{
sel = pThunk->next;
pThunk = (THUNKS *)GlobalLock16( sel );
base = 0;
}
if (!sel) return FALSE;
*(WORD *)((BYTE *)pThunk + LOWORD(thunk) - base) = pThunk->free;
pThunk->free = LOWORD(thunk) - base;
return TRUE;
}
/***********************************************************************
* TASK_CallToStart
*
* 32-bit entry point for a new task. This function is responsible for
* setting up the registers and jumping to the 16-bit entry point.
*/
void TASK_CallToStart(void)
{
TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
NE_MODULE *pModule = NE_GetPtr( pTask->hModule );
SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
CONTEXT86 context;
/* Add task to 16-bit scheduler pool */
TASK_Reschedule();
/* Registers at initialization must be:
* ax zero
* bx stack size in bytes
* cx heap size in bytes
* si previous app instance
* di current app instance
* bp zero
* es selector to the PSP
* ds dgroup of the application
* ss stack selector
* sp top of the stack
*/
memset( &context, 0, sizeof(context) );
CS_reg(&context) = GlobalHandleToSel16(pSegTable[pModule->cs - 1].hSeg);
DS_reg(&context) = GlobalHandleToSel16(pTask->hInstance);
ES_reg(&context) = pTask->hPDB;
EIP_reg(&context) = pModule->ip;
EBX_reg(&context) = pModule->stack_size;
ECX_reg(&context) = pModule->heap_size;
EDI_reg(&context) = pTask->hInstance;
ESI_reg(&context) = pTask->hPrevInstance;
TRACE_(task)("Starting main program: cs:ip=%04lx:%04lx ds=%04lx ss:sp=%04x:%04x\n",
CS_reg(&context), EIP_reg(&context), DS_reg(&context),
SELECTOROF(pTask->teb->cur_stack),
OFFSETOF(pTask->teb->cur_stack) );
Callbacks->CallRegisterShortProc( &context, 0 );
}
/***********************************************************************
* TASK_Create
*
* NOTE: This routine might be called by a Win32 thread. Thus, we need
* to be careful to protect global data structures. We do this
* by entering the Win16Lock while linking the task into the
* global task list.
*/
BOOL TASK_Create( NE_MODULE *pModule, UINT16 cmdShow)
{
HTASK16 hTask;
TDB *pTask;
LPSTR cmd_line;
char name[10];
PDB *pdb32 = PROCESS_Current();
/* Allocate the task structure */
hTask = GLOBAL_Alloc( GMEM_FIXED | GMEM_ZEROINIT, sizeof(TDB),
pModule->self, FALSE, FALSE, FALSE );
if (!hTask) return FALSE;
pTask = (TDB *)GlobalLock16( hTask );
/* Fill the task structure */
pTask->nEvents = 0;
pTask->hSelf = hTask;
pTask->flags = 0;
if (pModule->flags & NE_FFLAGS_WIN32)
pTask->flags |= TDBF_WIN32;
if (pModule->lpDosTask)
pTask->flags |= TDBF_WINOLDAP;
pTask->hInstance = pModule->self;
pTask->hPrevInstance = 0;
/* NOTE: for 16-bit tasks, the instance handles are updated later on
in NE_InitProcess */
pTask->version = pModule->expected_version;
pTask->hModule = pModule->self;
pTask->hParent = GetCurrentTask();
pTask->magic = TDB_MAGIC;
pTask->nCmdShow = cmdShow;
pTask->teb = NtCurrentTeb();
pTask->curdrive = DRIVE_GetCurrentDrive() | 0x80;
strcpy( pTask->curdir, "\\" );
lstrcpynA( pTask->curdir + 1, DRIVE_GetDosCwd( DRIVE_GetCurrentDrive() ),
sizeof(pTask->curdir) - 1 );
/* Create the thunks block */
TASK_CreateThunks( hTask, (int)&pTask->thunks - (int)pTask, 7 );
/* Copy the module name */
GetModuleName16( pModule->self, name, sizeof(name) );
strncpy( pTask->module_name, name, sizeof(pTask->module_name) );
/* Allocate a selector for the PDB */
pTask->hPDB = GLOBAL_CreateBlock( GMEM_FIXED, &pTask->pdb, sizeof(PDB16),
pModule->self, FALSE, FALSE, FALSE, NULL );
/* Fill the PDB */
pTask->pdb.int20 = 0x20cd;
pTask->pdb.dispatcher[0] = 0x9a; /* ljmp */
PUT_DWORD(&pTask->pdb.dispatcher[1], (DWORD)NE_GetEntryPoint(
GetModuleHandle16("KERNEL"), 102 )); /* KERNEL.102 is DOS3Call() */
pTask->pdb.savedint22 = INT_GetPMHandler( 0x22 );
pTask->pdb.savedint23 = INT_GetPMHandler( 0x23 );
pTask->pdb.savedint24 = INT_GetPMHandler( 0x24 );
pTask->pdb.fileHandlesPtr =
PTR_SEG_OFF_TO_SEGPTR( GlobalHandleToSel16(pTask->hPDB),
(int)&((PDB16 *)0)->fileHandles );
pTask->pdb.hFileHandles = 0;
memset( pTask->pdb.fileHandles, 0xff, sizeof(pTask->pdb.fileHandles) );
pTask->pdb.environment = pdb32->env_db->env_sel;
pTask->pdb.nbFiles = 20;
/* Fill the command line */
cmd_line = pdb32->env_db->cmd_line;
while (*cmd_line && (*cmd_line != ' ') && (*cmd_line != '\t')) cmd_line++;
while ((*cmd_line == ' ') || (*cmd_line == '\t')) cmd_line++;
lstrcpynA( pTask->pdb.cmdLine+1, cmd_line, sizeof(pTask->pdb.cmdLine)-1);
pTask->pdb.cmdLine[0] = strlen( pTask->pdb.cmdLine + 1 );
/* Get the compatibility flags */
pTask->compat_flags = GetProfileIntA( "Compatibility", name, 0 );
/* Allocate a code segment alias for the TDB */
pTask->hCSAlias = GLOBAL_CreateBlock( GMEM_FIXED, (void *)pTask,
sizeof(TDB), pTask->hPDB, TRUE,
FALSE, FALSE, NULL );
/* Set the owner of the environment block */
FarSetOwner16( pTask->pdb.environment, pTask->hPDB );
/* Default DTA overwrites command-line */
pTask->dta = PTR_SEG_OFF_TO_SEGPTR( pTask->hPDB,
(int)&pTask->pdb.cmdLine - (int)&pTask->pdb );
/* Create scheduler event for 16-bit tasks */
if ( !(pTask->flags & TDBF_WIN32) )
{
pTask->hEvent = CreateEventA( NULL, TRUE, FALSE, NULL );
pTask->hEvent = ConvertToGlobalHandle( pTask->hEvent );
}
/* Enter task handle into thread and process */
pTask->teb->htask16 = pTask->teb->process->task = hTask;
TRACE_(task)("module='%s' cmdline='%s' task=%04x\n", name, cmd_line, hTask );
/* Add the task to the linked list */
SYSLEVEL_EnterWin16Lock();
TASK_LinkTask( hTask );
SYSLEVEL_LeaveWin16Lock();
return TRUE;
}
/***********************************************************************
* TASK_DeleteTask
*/
static void TASK_DeleteTask( HTASK16 hTask )
{
TDB *pTask;
HGLOBAL16 hPDB;
if (!(pTask = (TDB *)GlobalLock16( hTask ))) return;
hPDB = pTask->hPDB;
pTask->magic = 0xdead; /* invalidate signature */
/* Delete the Win32 part of the task */
/* PROCESS_FreePDB( pTask->teb->process ); FIXME */
/* K32OBJ_DecCount( &pTask->teb->header ); FIXME */
/* Free the selector aliases */
GLOBAL_FreeBlock( pTask->hCSAlias );
GLOBAL_FreeBlock( pTask->hPDB );
/* Free the task module */
FreeModule16( pTask->hModule );
/* Free the task structure itself */
GlobalFree16( hTask );
/* Free all memory used by this task (including the 32-bit stack, */
/* the environment block and the thunk segments). */
GlobalFreeAll16( hPDB );
}
/***********************************************************************
* TASK_KillTask
*/
void TASK_KillTask( HTASK16 hTask )
{
TDB *pTask;
/* Enter the Win16Lock to protect global data structures */
SYSLEVEL_EnterWin16Lock();
if ( !hTask ) hTask = GetCurrentTask();
pTask = (TDB *)GlobalLock16( hTask );
if ( !pTask )
{
SYSLEVEL_LeaveWin16Lock();
return;
}
TRACE_(task)("Killing task %04x\n", hTask );
#ifdef MZ_SUPPORTED
{
/* Kill DOS VM task */
NE_MODULE *pModule = NE_GetPtr( pTask->hModule );
if ( pModule->lpDosTask )
MZ_KillModule( pModule->lpDosTask );
}
#endif
/* Perform USER cleanup */
TASK_CallTaskSignalProc( USIG16_TERMINATION, hTask );
PROCESS_CallUserSignalProc( USIG_PROCESS_EXIT, 0, 0 );
PROCESS_CallUserSignalProc( USIG_THREAD_EXIT, GetCurrentThreadId(), 0 );
PROCESS_CallUserSignalProc( USIG_PROCESS_DESTROY, 0, 0 );
if (nTaskCount <= 1)
{
TRACE_(task)("this is the last task, exiting\n" );
ExitKernel16();
}
/* FIXME: Hack! Send a message to the initial task so that
* the GetMessage wakes up and the initial task can check whether
* it is the only remaining one and terminate itself ...
* The initial task should probably install hooks or something
* to get informed about task termination :-/
*/
Callout.PostAppMessage16( PROCESS_Initial()->task, WM_NULL, 0, 0 );
/* Remove the task from the list to be sure we never switch back to it */
TASK_UnlinkTask( hTask );
if( nTaskCount )
{
TDB* p = (TDB *)GlobalLock16( hFirstTask );
while( p )
{
if( p->hYieldTo == hTask ) p->hYieldTo = 0;
p = (TDB *)GlobalLock16( p->hNext );
}
}
pTask->nEvents = 0;
if ( hLockedTask == hTask )
hLockedTask = 0;
TASK_DeleteTask( hTask );
/* When deleting the current task ... */
if ( hTask == hCurrentTask )
{
DWORD lockCount;
/* ... schedule another one ... */
TASK_Reschedule();
/* ... and completely release the Win16Lock, just in case. */
ReleaseThunkLock( &lockCount );
return;
}
SYSLEVEL_LeaveWin16Lock();
}
/***********************************************************************
* TASK_Reschedule
*
* This is where all the magic of task-switching happens!
*
* 16-bit Windows performs non-preemptive (cooperative) multitasking.
* This means that each 16-bit task runs until it voluntarily yields
* control, at which point the scheduler gets active and selects the
* next task to run.
*
* In Wine, all processes, even 16-bit ones, are scheduled preemptively
* by the standard scheduler of the underlying OS. As many 16-bit apps
* *rely* on the behaviour of the Windows scheduler, however, we have
* to simulate that behaviour.
*
* This is achieved as follows: every 16-bit task is at time (except
* during task creation and deletion) in one of two states: either it
* is the one currently running, then the global variable hCurrentTask
* contains its task handle, or it is not currently running, then it
* is blocked on a special scheduler event, a global handle to which
* is stored in the task struct.
*
* When the current task yields control, this routine gets called. Its
* purpose is to determine the next task to be active, signal the
* scheduler event of that task, and then put the current task to sleep
* waiting for *its* scheduler event to get signalled again.
*
* This routine can get called in a few other special situations as well:
*
* - On creation of a 16-bit task, the Unix process executing the task
* calls TASK_Reschedule once it has completed its initialization.
* At this point, the task needs to be blocked until its scheduler
* event is signalled the first time (this will be done by the parent
* process to get the task up and running).
*
* - When the task currently running terminates itself, this routine gets
* called and has to schedule another task, *without* blocking the
* terminating task.
*
* - When a 32-bit thread posts an event for a 16-bit task, it might be
* the case that *no* 16-bit task is currently running. In this case
* the task that has now an event pending is to be scheduled.
*
*/
void TASK_Reschedule(void)
{
TDB *pOldTask = NULL, *pNewTask = NULL;
HTASK16 hOldTask = 0, hNewTask = 0;
enum { MODE_YIELD, MODE_SLEEP, MODE_WAKEUP } mode;
DWORD lockCount;
SYSLEVEL_EnterWin16Lock();
/* Check what we need to do */
hOldTask = GetCurrentTask();
pOldTask = (TDB *)GlobalLock16( hOldTask );
TRACE_(task)( "entered with hCurrentTask %04x by hTask %04x (pid %ld)\n",
hCurrentTask, hOldTask, (long) getpid() );
if ( pOldTask && THREAD_IsWin16( NtCurrentTeb() ) )
{
/* We are called by an active (non-deleted) 16-bit task */
/* If we don't even have a current task, or else the current
task has yielded, we'll need to schedule a new task and
(possibly) put the calling task to sleep. Otherwise, we
only block the caller. */
if ( !hCurrentTask || hCurrentTask == hOldTask )
mode = MODE_YIELD;
else
mode = MODE_SLEEP;
}
else
{
/* We are called by a deleted 16-bit task or a 32-bit thread */
/* The only situation where we need to do something is if we
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_(task)( "\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 == hCurrentTask )
{
TRACE_(task)("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_(task)("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_(task)("Switching to task %04x (%.8s)\n",
hNewTask, pNewTask->module_name );
pNewTask->priority++;
TASK_UnlinkTask( hNewTask );
TASK_LinkTask( hNewTask );
pNewTask->priority--;
hCurrentTask = hNewTask;
SetEvent( pNewTask->hEvent );
/* 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 )
{
ResetEvent( pOldTask->hEvent );
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;
EAX_reg(context) = 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 );
pinstance->stackbottom = pinstance->stackmin; /* yup, that's right. Confused me too. */
pinstance->stacktop = ( pinstance->stackmin > BX_reg(context)?
pinstance->stackmin - BX_reg(context) : 0 ) + 150;
/* Initialize the local heap */
if ( CX_reg(context) )
LocalInit16( pTask->hInstance, 0, CX_reg(context) );
/* 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;
ESP_reg(context) -= 2;
EAX_reg(context) = 1;
if (!pTask->pdb.cmdLine[0]) EBX_reg(context) = 0x80;
else
{
LPBYTE p = &pTask->pdb.cmdLine[1];
while ((*p == ' ') || (*p == '\t')) p++;
EBX_reg(context) = 0x80 + (p - pTask->pdb.cmdLine);
}
ECX_reg(context) = pinstance->stacktop;
EDX_reg(context) = pTask->nCmdShow;
ESI_reg(context) = (DWORD)pTask->hPrevInstance;
EDI_reg(context) = (DWORD)pTask->hInstance;
ES_reg (context) = (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_(task)("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_(task)("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_(task)("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_(task)("called for Win32 thread (%04x)!\n", NtCurrentTeb()->teb_sel);
return;
}
TRACE_(task)("%04x: DirectedYield(%04x)\n", pCurTask->hSelf, hTask );
pCurTask->hYieldTo = hTask;
OldYield16();
TRACE_(task)("%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();
else OldYield16();
}
/***********************************************************************
* KERNEL_490 (KERNEL.490)
*/
HTASK16 WINAPI KERNEL_490( HTASK16 someTask )
{
if ( !someTask ) return 0;
FIXME_(task)("(%04x): stub\n", someTask );
return 0;
}
/***********************************************************************
* MakeProcInstance16 (KERNEL.51)
*/
FARPROC16 WINAPI MakeProcInstance16( FARPROC16 func, HANDLE16 hInstance )
{
BYTE *thunk,*lfunc;
SEGPTR thunkaddr;
if (!func) {
ERR_(task)("Ouch ! MakeProcInstance called with func == NULL !\n");
return (FARPROC16)0; /* Windows seems to do the same */
}
if ( GetTaskDS16() !=hInstance )
{
ERR_(task)("Problem with hInstance? Got %04x, using %04x instead\n",
hInstance,GetTaskDS16());
hInstance = GetTaskDS16();
}
if (!hInstance) hInstance = CURRENT_DS;
thunkaddr = TASK_AllocThunk( GetCurrentTask() );
if (!thunkaddr) return (FARPROC16)0;
thunk = PTR_SEG_TO_LIN( thunkaddr );
lfunc = PTR_SEG_TO_LIN( func );
TRACE_(task)("(%08lx,%04x): got thunk %08lx\n",
(DWORD)func, hInstance, (DWORD)thunkaddr );
if (((lfunc[0]==0x8c) && (lfunc[1]==0xd8)) ||
((lfunc[0]==0x1e) && (lfunc[1]==0x58))
) {
FIXME_(task)("thunk would be useless for %p, overwriting with nop;nop;\n", func );
lfunc[0]=0x90; /* nop */
lfunc[1]=0x90; /* nop */
}
*thunk++ = 0xb8; /* movw instance, %ax */
*thunk++ = (BYTE)(hInstance & 0xff);
*thunk++ = (BYTE)(hInstance >> 8);
*thunk++ = 0xea; /* ljmp func */
*(DWORD *)thunk = (DWORD)func;
return (FARPROC16)thunkaddr;
}
/***********************************************************************
* FreeProcInstance16 (KERNEL.52)
*/
void WINAPI FreeProcInstance16( FARPROC16 func )
{
TRACE_(task)("(%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;
/* 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 )
{
return TRUE; /* FIXME */
}
/***********************************************************************
* 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->process->task ) == oldQueue )
SetTaskQueue16( teb->process->task, 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( 0, THREAD_IsWin16(teb)? 4 : 5 );
if (!teb->queue)
FIXME_(task)("(): 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_(task)("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_(task)("No previous SwitchStackTo\n" );
return;
}
TRACE_(task)("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);
SS_reg(context) = SELECTOROF(pData->old_ss_sp);
ESP_reg(context) = 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 PROCESS_Current()->task;
}
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 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_(task)("(%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;
pTask = (TDB *)GlobalLock16( lpte->hNext );
if (!pTask || pTask->magic != TDB_MAGIC) return FALSE;
pInstData = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN( 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;
strncpy( lpte->szModule, pTask->module_name, 8 );
lpte->szModule[8] = '\0';
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 );
}
/***********************************************************************
* GetAppCompatFlags32 (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;
}
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