1152 lines
31 KiB
C
1152 lines
31 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "windows.h"
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#include "task.h"
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#include "callback.h"
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#include "dos_fs.h"
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#include "debugger.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 "options.h"
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#include "selectors.h"
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#include "toolhelp.h"
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#include "stddebug.h"
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#include "debug.h"
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#include "dde_proc.h"
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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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/* 32-bit stack size for each task */
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/* Must not be greater than 64k, or MAKE_SEGPTR won't work */
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#define STACK32_SIZE 0x10000
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static HTASK hFirstTask = 0;
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static HTASK hCurrentTask = 0;
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static HTASK hTaskToKill = 0;
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static HTASK hLockedTask = 0;
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static WORD nTaskCount = 0;
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static HANDLE hDOSEnvironment = 0;
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/* TASK_Reschedule() 16-bit entry point */
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static FARPROC TASK_RescheduleProc;
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#ifdef WINELIB
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#define TASK_SCHEDULE() TASK_Reschedule();
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#else
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#define TASK_SCHEDULE() CallTo16_word_(TASK_RescheduleProc,0)
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#endif
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static HANDLE TASK_CreateDOSEnvironment(void);
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/***********************************************************************
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* TASK_Init
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*/
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BOOL TASK_Init(void)
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{
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TASK_RescheduleProc = (FARPROC)GetWndProcEntry16( "TASK_Reschedule" );
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if (!(hDOSEnvironment = TASK_CreateDOSEnvironment()))
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fprintf( stderr, "Not enough memory for DOS Environment\n" );
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return (hDOSEnvironment != 0);
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}
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/***********************************************************************
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* TASK_CreateDOSEnvironment
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*
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* Create the original DOS environment.
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*/
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static HANDLE TASK_CreateDOSEnvironment(void)
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{
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static const char program_name[] = "KRNL386.EXE";
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char **e, *p;
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int initial_size, size;
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HANDLE handle;
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extern char **environ;
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extern char WindowsDirectory[], SystemDirectory[];
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/* DOS environment format:
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* ASCIIZ string 1
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* ASCIIZ string 2
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* ...
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* ASCIIZ string n
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* ASCIIZ PATH=xxx
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* ASCIIZ windir=xxx
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* BYTE 0
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* WORD 1
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* ASCIIZ program name (e.g. C:\WINDOWS\SYSTEM\KRNL386.EXE)
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*/
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/* First compute the size of the fixed part of the environment */
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initial_size = 5 + /* PATH= */
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strlen(WindowsPath) + 1 + /* path value */
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7 + /* windir= */
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strlen(WindowsDirectory) + 1 + /* windir value */
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1 + /* BYTE 0 at end */
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sizeof(WORD) + /* WORD 1 */
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strlen(SystemDirectory) + 1 + /* program directory */
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strlen(program_name) + 1; /* program name */
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/* Compute the total size of the Unix environment (except path) */
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for (e = environ, size = initial_size; *e; e++)
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{
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if (strncasecmp(*e, "path=", 5))
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{
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int len = strlen(*e) + 1;
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if (size + len >= 32767)
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{
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fprintf( stderr, "Warning: environment larger than 32k.\n" );
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break;
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}
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size += len;
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}
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}
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/* Now allocate the environment */
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if (!(handle = GlobalAlloc( GMEM_FIXED, size ))) return 0;
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p = (char *)GlobalLock( handle );
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/* And fill it with the Unix environment */
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for (e = environ, size = initial_size; *e; e++)
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{
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if (strncasecmp(*e, "path=", 5))
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{
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int len = strlen(*e) + 1;
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if (size + len >= 32767) break;
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strcpy( p, *e );
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size += len;
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p += len;
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}
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}
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/* Now add the path and Windows directory */
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strcpy( p, "PATH=" );
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strcat( p, WindowsPath );
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p += strlen(p) + 1;
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strcpy( p, "windir=" );
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strcat( p, WindowsDirectory );
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p += strlen(p) + 1;
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/* Now add the program name */
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*p++ = '\0';
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*(WORD *)p = 1;
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p += sizeof(WORD);
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strcpy( p, SystemDirectory );
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strcat( p, "\\" );
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strcat( p, program_name );
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/* Display it */
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p = (char *) GlobalLock( handle );
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dprintf_task(stddeb, "Master DOS environment at %p\n", p);
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for (; *p; p += strlen(p) + 1) dprintf_task(stddeb, " %s\n", p);
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dprintf_task( stddeb, "Progname: %s\n", p+3 );
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return handle;
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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( HTASK hTask )
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{
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HTASK *prevTask;
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TDB *pTask;
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if (!(pTask = (TDB *)GlobalLock( 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 *)GlobalLock( *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( HTASK hTask )
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{
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HTASK *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 *)GlobalLock( *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 *)GlobalLock( *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( HGLOBAL 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 *)GlobalLock( 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( HTASK 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 *)GlobalLock( 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, TRUE, FALSE, FALSE );
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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 *)GlobalLock( 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 MAKELONG( base, sel );
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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( HTASK 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 *)GlobalLock( 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 *)GlobalLock( 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_CallToStart
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*
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* 32-bit entry point for a new task. This function is responsible for
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* setting up the registers and jumping to the 16-bit entry point.
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*/
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static void TASK_CallToStart(void)
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{
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int cs_reg, ds_reg, ip_reg;
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TDB *pTask = (TDB *)GlobalLock( hCurrentTask );
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NE_MODULE *pModule = (NE_MODULE *)GlobalLock( pTask->hModule );
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SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
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/* Registers at initialization must be:
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* ax zero
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* bx stack size in bytes
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* cx heap size in bytes
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* si previous app instance
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* di current app instance
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* bp zero
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* es selector to the PSP
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* ds dgroup of the application
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* ss stack selector
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* sp top of the stack
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*/
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cs_reg = pSegTable[pModule->cs - 1].selector;
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ip_reg = pModule->ip;
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ds_reg = pSegTable[pModule->dgroup - 1].selector;
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#ifndef WINELIB
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/* JBP: I doubt a CallTo16_regs_ is possible in libwine.a, and IF1632 is not
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* allowed.
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*/
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IF1632_Saved16_ss = pTask->ss;
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IF1632_Saved16_sp = pTask->sp;
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dprintf_task( stddeb, "Starting main program: cs:ip=%04x:%04x ds=%04x ss:sp=%04x:%04x\n",
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cs_reg, ip_reg, ds_reg,
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IF1632_Saved16_ss, IF1632_Saved16_sp);
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CallTo16_regs_( (FARPROC)(cs_reg << 16 | ip_reg), ds_reg,
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pTask->hPDB /*es*/, 0 /*bp*/, 0 /*ax*/,
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pModule->stack_size /*bx*/, pModule->heap_size /*cx*/,
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0 /*dx*/, 0 /*si*/, ds_reg /*di*/ );
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#else
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fprintf(stderr, "JBP: Ignoring main program: cs:ip=%04x:%04x ds=%04x ss:sp=%04x:%04x\n",
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cs_reg, ip_reg, ds_reg,
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pTask->ss, pTask->sp);
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#endif
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/* This should never return */
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fprintf( stderr, "TASK_CallToStart: Main program returned!\n" );
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TASK_KillCurrentTask( 1 );
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}
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/***********************************************************************
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* TASK_CreateTask
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*/
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HTASK TASK_CreateTask( HMODULE hModule, HANDLE hInstance, HANDLE hPrevInstance,
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HANDLE hEnvironment, char *cmdLine, WORD cmdShow )
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{
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HTASK hTask;
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TDB *pTask;
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HANDLE hParentEnv;
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NE_MODULE *pModule;
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SEGTABLEENTRY *pSegTable;
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LPSTR name;
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char filename[256];
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#ifndef WINELIB32
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char *stack16Top, *stack32Top;
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STACK16FRAME *frame16;
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STACK32FRAME *frame32;
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extern DWORD CALL16_RetAddr_word;
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#endif
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if (!(pModule = (NE_MODULE *)GlobalLock( hModule ))) return 0;
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pSegTable = NE_SEG_TABLE( pModule );
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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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hModule, FALSE, FALSE, FALSE );
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if (!hTask) return 0;
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pTask = (TDB *)GlobalLock( hTask );
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/* Allocate the new environment block */
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if (!(hParentEnv = hEnvironment))
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{
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TDB *pParent = (TDB *)GlobalLock( hCurrentTask );
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hParentEnv = pParent ? pParent->pdb.environment : hDOSEnvironment;
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}
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/* FIXME: do we really need to make a copy also when */
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/* we don't use the parent environment? */
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if (!(hEnvironment = GlobalAlloc( GMEM_FIXED, GlobalSize( hParentEnv ) )))
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{
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GlobalFree( hTask );
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return 0;
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}
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memcpy( GlobalLock( hEnvironment ), GlobalLock( hParentEnv ),
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GlobalSize( hParentEnv ) );
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/* Get current directory */
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GetModuleFileName( hModule, filename, sizeof(filename) );
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name = strrchr(filename, '\\');
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if (name) *(name+1) = 0;
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/* Fill the task structure */
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pTask->nEvents = 1; /* So the task can be started */
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pTask->hSelf = hTask;
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pTask->flags = 0;
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pTask->version = pModule->expected_version;
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pTask->hInstance = hInstance;
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pTask->hPrevInstance = hPrevInstance;
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pTask->hModule = hModule;
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pTask->hParent = hCurrentTask;
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pTask->curdrive = filename[0] - 'A' + 0x80;
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pTask->magic = TDB_MAGIC;
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pTask->nCmdShow = cmdShow;
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strcpy( pTask->curdir, filename+2 );
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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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name = MODULE_GetModuleName( hModule );
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strncpy( pTask->module_name, name, sizeof(pTask->module_name) );
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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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*(DWORD *)&pTask->pdb.dispatcher[1] = MODULE_GetEntryPoint( GetModuleHandle("KERNEL"), 102 ); /* KERNEL.102 is DOS3Call() */
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#ifndef WINELIB
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pTask->pdb.savedint22 = INT_GetHandler( 0x22 );
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pTask->pdb.savedint23 = INT_GetHandler( 0x23 );
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pTask->pdb.savedint24 = INT_GetHandler( 0x24 );
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#endif
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pTask->pdb.environment = hEnvironment;
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strncpy( pTask->pdb.cmdLine + 1, cmdLine, 126 );
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pTask->pdb.cmdLine[127] = '\0';
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pTask->pdb.cmdLine[0] = strlen( pTask->pdb.cmdLine + 1 );
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/* Get the compatibility flags */
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pTask->compat_flags = GetProfileInt( name, "Compatibility", 0 );
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/* Allocate a selector for the PDB */
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pTask->hPDB = GLOBAL_CreateBlock( GMEM_FIXED, &pTask->pdb, sizeof(PDB),
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hModule, FALSE, FALSE, FALSE, NULL );
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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, TRUE,
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FALSE, FALSE, NULL );
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/* Set the owner of the environment block */
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FarSetOwner( pTask->pdb.environment, pTask->hPDB );
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/* Default DTA overwrites command-line */
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pTask->dta = MAKELONG( (int)&pTask->pdb.cmdLine - (int)&pTask->pdb,
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pTask->hPDB );
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/* Allocate the 32-bit stack */
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#ifndef WINELIB
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pTask->hStack32 = GLOBAL_Alloc( GMEM_FIXED, STACK32_SIZE, pTask->hPDB,
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FALSE, FALSE, FALSE );
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/* Create the 32-bit stack frame */
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*(DWORD *)GlobalLock(pTask->hStack32) = 0xDEADBEEF;
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stack32Top = (char*)GlobalLock(pTask->hStack32) + STACK32_SIZE;
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frame32 = (STACK32FRAME *)stack32Top - 1;
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frame32->saved_esp = (DWORD)stack32Top;
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frame32->edi = 0;
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frame32->esi = 0;
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frame32->edx = 0;
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frame32->ecx = 0;
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frame32->ebx = 0;
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frame32->ebp = 0;
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frame32->retaddr = (DWORD)TASK_CallToStart;
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frame32->codeselector = WINE_CODE_SELECTOR;
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pTask->esp = (DWORD)frame32;
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/* Create the 16-bit stack frame */
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pTask->ss = hInstance;
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pTask->sp = ((pModule->sp != 0) ? pModule->sp :
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pSegTable[pModule->ss-1].minsize + pModule->stack_size) & ~1;
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stack16Top = (char *)PTR_SEG_OFF_TO_LIN( pTask->ss, pTask->sp );
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frame16 = (STACK16FRAME *)stack16Top - 1;
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frame16->saved_ss = 0; /*pTask->ss;*/
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frame16->saved_sp = 0; /*pTask->sp;*/
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frame16->ds = frame16->es = pTask->hInstance;
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frame16->entry_point = 0;
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frame16->ordinal_number = 24; /* WINPROCS.24 is TASK_Reschedule */
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frame16->dll_id = 24; /* WINPROCS */
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frame16->bp = 0;
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frame16->ip = LOWORD( CALL16_RetAddr_word );
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frame16->cs = HIWORD( CALL16_RetAddr_word );
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pTask->sp -= sizeof(STACK16FRAME);
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|
|
/* If there's no 16-bit stack yet, use a part of the new task stack */
|
|
/* This is only needed to have a stack to switch from on the first */
|
|
/* call to DirectedYield(). */
|
|
|
|
if (!IF1632_Saved16_ss)
|
|
{
|
|
IF1632_Saved16_ss = pTask->ss;
|
|
IF1632_Saved16_sp = pTask->sp;
|
|
}
|
|
|
|
/* Add a breakpoint at the start of the task */
|
|
|
|
if (Options.debug)
|
|
{
|
|
DBG_ADDR addr = { pSegTable[pModule->cs-1].selector, pModule->ip };
|
|
fprintf( stderr, "Task '%s': ", name );
|
|
DEBUG_AddBreakpoint( &addr );
|
|
}
|
|
#endif
|
|
|
|
/* Add the task to the linked list */
|
|
|
|
TASK_LinkTask( hTask );
|
|
|
|
dprintf_task( stddeb, "CreateTask: module='%s' cmdline='%s' task="NPFMT"\n",
|
|
name, cmdLine, hTask );
|
|
|
|
return hTask;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* TASK_DeleteTask
|
|
*/
|
|
static void TASK_DeleteTask( HTASK hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock( hTask ))) return;
|
|
|
|
/* Free the task module */
|
|
|
|
FreeModule( pTask->hModule );
|
|
|
|
/* Free all memory used by this task (including the 32-bit stack, */
|
|
/* the environment block and the thunk segments). */
|
|
|
|
GlobalFreeAll( pTask->hPDB );
|
|
|
|
/* Free the selector aliases */
|
|
|
|
GLOBAL_FreeBlock( pTask->hCSAlias );
|
|
GLOBAL_FreeBlock( pTask->hPDB );
|
|
|
|
/* Free the task structure itself */
|
|
|
|
GlobalFree( hTask );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* TASK_KillCurrentTask
|
|
*
|
|
* Kill the currently running task. As it's not possible to kill the
|
|
* current task like this, it is simply marked for destruction, and will
|
|
* be killed when either TASK_Reschedule or this function is called again
|
|
* in the context of another task.
|
|
*/
|
|
void TASK_KillCurrentTask( int exitCode )
|
|
{
|
|
if (hTaskToKill && (hTaskToKill != hCurrentTask))
|
|
{
|
|
/* If another task is already marked for destruction, */
|
|
/* we call kill it now, as we are in another context. */
|
|
TASK_DeleteTask( hTaskToKill );
|
|
}
|
|
|
|
if (nTaskCount <= 1)
|
|
{
|
|
dprintf_task( stddeb, "Killing the last task, exiting\n" );
|
|
exit(0);
|
|
}
|
|
|
|
/* Remove the task from the list to be sure we never switch back to it */
|
|
TASK_UnlinkTask( hCurrentTask );
|
|
|
|
hTaskToKill = hCurrentTask;
|
|
hLockedTask = 0;
|
|
Yield();
|
|
/* We never return from Yield() */
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* TASK_Reschedule
|
|
*
|
|
* This is where all the magic of task-switching happens!
|
|
*
|
|
* This function should only be called via the TASK_SCHEDULE() macro, to make
|
|
* sure that all the context is saved correctly.
|
|
*/
|
|
void TASK_Reschedule(void)
|
|
{
|
|
TDB *pOldTask = NULL, *pNewTask;
|
|
HTASK hTask = 0;
|
|
|
|
#ifdef CONFIG_IPC
|
|
dde_reschedule();
|
|
#endif
|
|
/* First check if there's a task to kill */
|
|
|
|
if (hTaskToKill && (hTaskToKill != hCurrentTask))
|
|
{
|
|
TASK_DeleteTask( hTaskToKill );
|
|
hTaskToKill = 0;
|
|
}
|
|
|
|
/* If current task is locked, simply return */
|
|
|
|
if (hLockedTask) return;
|
|
|
|
/* Find a task to yield to */
|
|
|
|
pOldTask = (TDB *)GlobalLock( hCurrentTask );
|
|
if (pOldTask && pOldTask->hYieldTo)
|
|
{
|
|
/* If a task is stored in hYieldTo of the current task (put there */
|
|
/* by DirectedYield), yield to it only if it has events pending. */
|
|
hTask = pOldTask->hYieldTo;
|
|
if (!(pNewTask = (TDB *)GlobalLock( hTask )) || !pNewTask->nEvents)
|
|
hTask = 0;
|
|
}
|
|
|
|
if (!hTask)
|
|
{
|
|
hTask = hFirstTask;
|
|
while (hTask)
|
|
{
|
|
pNewTask = (TDB *)GlobalLock( hTask );
|
|
if (pNewTask->nEvents && (hTask != hCurrentTask)) break;
|
|
hTask = pNewTask->hNext;
|
|
}
|
|
}
|
|
|
|
/* If there's a task to kill, switch to any other task, */
|
|
/* even if it doesn't have events pending. */
|
|
|
|
if (!hTask && hTaskToKill) hTask = hFirstTask;
|
|
|
|
if (!hTask) return; /* Do nothing */
|
|
|
|
pNewTask = (TDB *)GlobalLock( hTask );
|
|
dprintf_task( stddeb, "Switching to task "NPFMT" (%.8s)\n",
|
|
hTask, pNewTask->module_name );
|
|
|
|
/* Save the stacks of the previous task (if any) */
|
|
|
|
#ifndef WINELIB /* FIXME: JBP: IF1632 not allowed in libwine.a */
|
|
if (pOldTask)
|
|
{
|
|
pOldTask->ss = IF1632_Saved16_ss;
|
|
pOldTask->sp = IF1632_Saved16_sp;
|
|
pOldTask->esp = IF1632_Saved32_esp;
|
|
}
|
|
else IF1632_Original32_esp = IF1632_Saved32_esp;
|
|
#endif
|
|
|
|
/* Make the task the last in the linked list (round-robin scheduling) */
|
|
|
|
pNewTask->priority++;
|
|
TASK_UnlinkTask( hTask );
|
|
TASK_LinkTask( hTask );
|
|
pNewTask->priority--;
|
|
|
|
/* Switch to the new stack */
|
|
|
|
hCurrentTask = hTask;
|
|
#ifndef WINELIB /* FIXME: JBP: IF1632 not allowed in libwine.a */
|
|
IF1632_Saved16_ss = pNewTask->ss;
|
|
IF1632_Saved16_sp = pNewTask->sp;
|
|
IF1632_Saved32_esp = pNewTask->esp;
|
|
IF1632_Stack32_base = WIN16_GlobalLock( pNewTask->hStack32 );
|
|
#endif
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* InitTask (KERNEL.91)
|
|
*/
|
|
void InitTask( struct sigcontext_struct context )
|
|
{
|
|
static int firstTask = 1;
|
|
TDB *pTask;
|
|
NE_MODULE *pModule;
|
|
SEGTABLEENTRY *pSegTable;
|
|
INSTANCEDATA *pinstance;
|
|
LONG stacklow, stackhi;
|
|
|
|
context.sc_eax = 0;
|
|
if (!(pTask = (TDB *)GlobalLock( hCurrentTask ))) return;
|
|
if (!(pModule = (NE_MODULE *)GlobalLock( pTask->hModule ))) return;
|
|
|
|
if (firstTask)
|
|
{
|
|
extern BOOL WIDGETS_Init(void);
|
|
extern BOOL WIN_CreateDesktopWindow(void);
|
|
|
|
/* Perform global initialisations that need a task context */
|
|
|
|
/* Initialize built-in window classes */
|
|
if (!WIDGETS_Init()) return;
|
|
|
|
/* Create desktop window */
|
|
if (!WIN_CreateDesktopWindow()) return;
|
|
|
|
firstTask = 0;
|
|
}
|
|
|
|
NE_InitializeDLLs( 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
|
|
*/
|
|
context.sc_eax = 1;
|
|
context.sc_ebx = 0x81;
|
|
context.sc_ecx = pModule->stack_size;
|
|
context.sc_edx = pTask->nCmdShow;
|
|
context.sc_esi = (DWORD)pTask->hPrevInstance;
|
|
context.sc_edi = (DWORD)pTask->hInstance;
|
|
context.sc_es = (WORD)pTask->hPDB;
|
|
|
|
/* Initialize the local heap */
|
|
if ( pModule->heap_size )
|
|
{
|
|
LocalInit( pTask->hInstance, 0, pModule->heap_size );
|
|
}
|
|
|
|
|
|
/* Initialize the INSTANCEDATA structure */
|
|
pSegTable = NE_SEG_TABLE( pModule );
|
|
stacklow = pSegTable[pModule->ss - 1].minsize;
|
|
stackhi = stacklow + pModule->stack_size;
|
|
if (stackhi > 0xffff) stackhi = 0xffff;
|
|
pinstance = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN(CURRENT_DS, 0);
|
|
pinstance->stackbottom = stackhi; /* yup, that's right. Confused me too. */
|
|
pinstance->stacktop = stacklow;
|
|
#ifndef WINELIB /* FIXME: JBP: IF1632 not allowed in libwine.a */
|
|
pinstance->stackmin = IF1632_Saved16_sp;
|
|
#endif
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* WaitEvent (KERNEL.30)
|
|
*/
|
|
BOOL WaitEvent( HTASK hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!hTask) hTask = hCurrentTask;
|
|
pTask = (TDB *)GlobalLock( hTask );
|
|
if (pTask->nEvents > 0)
|
|
{
|
|
pTask->nEvents--;
|
|
return FALSE;
|
|
}
|
|
TASK_SCHEDULE();
|
|
/* When we get back here, we have an event (or the task is the only one) */
|
|
if (pTask->nEvents > 0) pTask->nEvents--;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* PostEvent (KERNEL.31)
|
|
*/
|
|
void PostEvent( HTASK hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!hTask) hTask = hCurrentTask;
|
|
if (!(pTask = (TDB *)GlobalLock( hTask ))) return;
|
|
pTask->nEvents++;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SetPriority (KERNEL.32)
|
|
*/
|
|
void SetPriority( HTASK hTask, int delta )
|
|
{
|
|
TDB *pTask;
|
|
int newpriority;
|
|
|
|
if (!hTask) hTask = hCurrentTask;
|
|
if (!(pTask = (TDB *)GlobalLock( 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)
|
|
*/
|
|
HTASK LockCurrentTask( BOOL bLock )
|
|
{
|
|
if (bLock) hLockedTask = hCurrentTask;
|
|
else hLockedTask = 0;
|
|
return hLockedTask;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsTaskLocked (KERNEL.122)
|
|
*/
|
|
WORD IsTaskLocked(void)
|
|
{
|
|
return hLockedTask;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* OldYield (KERNEL.117)
|
|
*/
|
|
void OldYield(void)
|
|
{
|
|
TDB *pCurTask;
|
|
|
|
pCurTask = (TDB *)GlobalLock( hCurrentTask );
|
|
if (pCurTask) pCurTask->nEvents++; /* Make sure we get back here */
|
|
TASK_SCHEDULE();
|
|
if (pCurTask) pCurTask->nEvents--;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* DirectedYield (KERNEL.150)
|
|
*/
|
|
void DirectedYield( HTASK hTask )
|
|
{
|
|
TDB *pCurTask;
|
|
|
|
if ((pCurTask = (TDB *)GlobalLock( hCurrentTask )) != NULL)
|
|
pCurTask->hYieldTo = hTask;
|
|
|
|
OldYield();
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* Yield (KERNEL.29)
|
|
*/
|
|
void Yield(void)
|
|
{
|
|
DirectedYield( 0 );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* MakeProcInstance (KERNEL.51)
|
|
*/
|
|
FARPROC MakeProcInstance( FARPROC func, HANDLE hInstance )
|
|
{
|
|
BYTE *thunk;
|
|
SEGPTR thunkaddr;
|
|
|
|
thunkaddr = TASK_AllocThunk( hCurrentTask );
|
|
if (!thunkaddr) return (FARPROC)0;
|
|
thunk = PTR_SEG_TO_LIN( thunkaddr );
|
|
|
|
dprintf_task( stddeb, "MakeProcInstance(%08lx,"NPFMT"): got thunk %08lx\n",
|
|
(SEGPTR)func, hInstance, (SEGPTR)thunkaddr );
|
|
|
|
*thunk++ = 0xb8; /* movw instance, %ax */
|
|
#ifndef WINELIB
|
|
*thunk++ = (BYTE)(hInstance & 0xff);
|
|
*thunk++ = (BYTE)(hInstance >> 8);
|
|
#endif
|
|
*thunk++ = 0xea; /* ljmp func */
|
|
*(DWORD *)thunk = (DWORD)func;
|
|
return (FARPROC)thunkaddr;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* FreeProcInstance (KERNEL.52)
|
|
*/
|
|
void FreeProcInstance( FARPROC func )
|
|
{
|
|
dprintf_task( stddeb, "FreeProcInstance(%08lx)\n", (SEGPTR)func );
|
|
TASK_FreeThunk( hCurrentTask, (SEGPTR)func );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* GetCodeHandle (KERNEL.93)
|
|
*/
|
|
HANDLE GetCodeHandle( FARPROC proc )
|
|
{
|
|
HANDLE handle;
|
|
BYTE *thunk = (BYTE *)PTR_SEG_TO_LIN( proc );
|
|
|
|
/* Return the code segment containing 'proc'. */
|
|
/* Not sure if this is really correct (shouldn't matter that much). */
|
|
|
|
/* Check if it is really a thunk */
|
|
if ((thunk[0] == 0xb8) && (thunk[3] == 0xea))
|
|
handle = GlobalHandle( thunk[6] + (thunk[7] << 8) );
|
|
else
|
|
handle = GlobalHandle( HIWORD(proc) );
|
|
|
|
printf( "STUB: GetCodeHandle(%08lx) returning "NPFMT"\n",
|
|
(DWORD)proc, handle );
|
|
return handle;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SetTaskQueue (KERNEL.34)
|
|
*/
|
|
HGLOBAL SetTaskQueue( HANDLE hTask, HGLOBAL hQueue )
|
|
{
|
|
HGLOBAL hPrev;
|
|
TDB *pTask;
|
|
|
|
if (!hTask) hTask = hCurrentTask;
|
|
if (!(pTask = (TDB *)GlobalLock( hTask ))) return 0;
|
|
hPrev = pTask->hQueue;
|
|
pTask->hQueue = hQueue;
|
|
return hPrev;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetTaskQueue (KERNEL.35)
|
|
*/
|
|
HGLOBAL GetTaskQueue( HANDLE hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!hTask) hTask = hCurrentTask;
|
|
if (!(pTask = (TDB *)GlobalLock( hTask ))) return 0;
|
|
return pTask->hQueue;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetCurrentTask (KERNEL.36)
|
|
*/
|
|
HTASK GetCurrentTask(void)
|
|
{
|
|
/* Undocumented: first task is returned in high word */
|
|
#ifdef WINELIB32
|
|
return hCurrentTask;
|
|
#else
|
|
return MAKELONG( hCurrentTask, hFirstTask );
|
|
#endif
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetCurrentPDB (KERNEL.37)
|
|
*/
|
|
HANDLE GetCurrentPDB(void)
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock( hCurrentTask ))) return 0;
|
|
return pTask->hPDB;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetInstanceData (KERNEL.54)
|
|
*/
|
|
int GetInstanceData( HANDLE instance, WORD buffer, int len )
|
|
{
|
|
char *ptr = (char *)GlobalLock( instance );
|
|
if (!ptr || !len) return 0;
|
|
if ((int)buffer + len >= 0x10000) len = 0x10000 - buffer;
|
|
memcpy( ptr + buffer, (char *)GlobalLock( CURRENT_DS ) + buffer, len );
|
|
return len;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetDOSEnvironment (KERNEL.131)
|
|
*/
|
|
SEGPTR GetDOSEnvironment(void)
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock( hCurrentTask ))) return 0;
|
|
return (SEGPTR)WIN16_GlobalLock( pTask->pdb.environment );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetNumTasks (KERNEL.152)
|
|
*/
|
|
WORD GetNumTasks(void)
|
|
{
|
|
return nTaskCount;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetTaskDS (KERNEL.155)
|
|
*/
|
|
HINSTANCE GetTaskDS(void)
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock( hCurrentTask ))) return 0;
|
|
return pTask->hInstance;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsTask (KERNEL.320)
|
|
*/
|
|
BOOL IsTask( HTASK hTask )
|
|
{
|
|
TDB *pTask;
|
|
|
|
if (!(pTask = (TDB *)GlobalLock( hTask ))) return FALSE;
|
|
if (GlobalSize( hTask ) < sizeof(TDB)) return FALSE;
|
|
return (pTask->magic == TDB_MAGIC);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetExePtr (KERNEL.133)
|
|
*/
|
|
HMODULE GetExePtr( HANDLE handle )
|
|
{
|
|
char *ptr;
|
|
HTASK hTask;
|
|
HANDLE owner;
|
|
|
|
/* Check for module handle */
|
|
|
|
if (!(ptr = GlobalLock( handle ))) return 0;
|
|
if (((NE_MODULE *)ptr)->magic == NE_SIGNATURE) return handle;
|
|
|
|
/* Check the owner for module handle */
|
|
|
|
#ifndef WINELIB
|
|
owner = FarGetOwner( handle );
|
|
#else
|
|
owner = NULL;
|
|
fprintf(stderr,"JBP: FarGetOwner() ignored.\n");
|
|
#endif
|
|
if (!(ptr = GlobalLock( owner ))) return 0;
|
|
if (((NE_MODULE *)ptr)->magic == NE_SIGNATURE) return owner;
|
|
|
|
/* Search for this handle and its owner inside all tasks */
|
|
|
|
hTask = hFirstTask;
|
|
while (hTask)
|
|
{
|
|
TDB *pTask = (TDB *)GlobalLock( hTask );
|
|
if ((hTask == handle) ||
|
|
(pTask->hInstance == handle) ||
|
|
(pTask->hQueue == handle) ||
|
|
(pTask->hPDB == handle)) return pTask->hModule;
|
|
if ((hTask == owner) ||
|
|
(pTask->hInstance == owner) ||
|
|
(pTask->hQueue == owner) ||
|
|
(pTask->hPDB == owner)) return pTask->hModule;
|
|
hTask = pTask->hNext;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* TaskFirst (TOOLHELP.63)
|
|
*/
|
|
BOOL TaskFirst( TASKENTRY *lpte )
|
|
{
|
|
lpte->hNext = hFirstTask;
|
|
return TaskNext( lpte );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* TaskNext (TOOLHELP.64)
|
|
*/
|
|
BOOL TaskNext( TASKENTRY *lpte )
|
|
{
|
|
TDB *pTask;
|
|
INSTANCEDATA *pInstData;
|
|
|
|
dprintf_toolhelp( stddeb, "TaskNext(%p): task="NPFMT"\n", lpte, lpte->hNext );
|
|
if (!lpte->hNext) return FALSE;
|
|
pTask = (TDB *)GlobalLock( 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 = pTask->ss;
|
|
lpte->wSP = pTask->sp;
|
|
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)
|
|
*/
|
|
BOOL TaskFindHandle( TASKENTRY *lpte, HTASK hTask )
|
|
{
|
|
lpte->hNext = hTask;
|
|
return TaskNext( lpte );
|
|
}
|