include/task.h

   1 /*
   2  * Task definitions
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #ifndef __WINE_TASK_H
   8 #define __WINE_TASK_H
   9
  10 #include "windef.h"
  11 #include "wine/windef16.h"
  12
  13 #include "pshpack1.h"
  14
  15   /* Process database (i.e. a normal DOS PSP) */
  16
  17 typedef struct
  18 {
  19     WORD      int20;                   /* 00 int 20h instruction */
  20     WORD      nextParagraph;           /* 02 Segment of next paragraph */
  21     BYTE      reserved1;
  22     BYTE      dispatcher[5];           /* 05 Long call to DOS */
  23     FARPROC16 savedint22 WINE_PACKED;  /* 0a Saved int 22h handler */
  24     FARPROC16 savedint23 WINE_PACKED;  /* 0e Saved int 23h handler */
  25     FARPROC16 savedint24 WINE_PACKED;  /* 12 Saved int 24h handler */
  26     WORD      parentPSP;               /* 16 Selector of parent PSP */
  27     BYTE      fileHandles[20];         /* 18 Open file handles */
  28     HANDLE16  environment;             /* 2c Selector of environment */
  29     DWORD     saveStack;               /* 2e SS:SP on last int21 call */
  30     WORD      nbFiles;                 /* 32 Number of file handles */
  31     SEGPTR    fileHandlesPtr;          /* 34 Pointer to file handle table */
  32     HANDLE16  hFileHandles;            /* 38 Handle to fileHandlesPtr */
  33     WORD      reserved3[17];
  34     BYTE      fcb1[16];                /* 5c First FCB */
  35     BYTE      fcb2[20];                /* 6c Second FCB */
  36     BYTE      cmdLine[128];            /* 80 Command-line (first byte is len)*/
  37     BYTE      padding[16];             /* Some apps access beyond the end of the cmd line */
  38 } PDB16;
  39
  40
  41   /* Segment containing MakeProcInstance() thunks */
  42 typedef struct
  43 {
  44     WORD  next;       /* Selector of next segment */
  45     WORD  magic;      /* Thunks signature */
  46     WORD  unused;
  47     WORD  free;       /* Head of the free list */
  48     WORD  thunks[4];  /* Each thunk is 4 words long */
  49 } THUNKS;
  50
  51 #define THUNK_MAGIC  ('P' | ('T' << 8))
  52
  53 struct _TEB;
  54 struct _WSINFO;
  55 struct _NE_MODULE;
  56
  57   /* signal proc typedef */
  58 typedef void CALLBACK (*USERSIGNALPROC)(HANDLE16, UINT16, UINT16,
  59                                         HINSTANCE16, HQUEUE16);
  60
  61   /* Task database. See 'Windows Internals' p. 226.
  62    * Note that 16-bit OLE 2 libs like to read it directly
  63    * so we have to keep entry offsets as they are.
  64    */
  65 typedef struct _TDB
  66 {
  67     HTASK16   hNext;                      /* 00 Selector of next TDB */
  68     DWORD     ss_sp WINE_PACKED;          /* 02 Stack pointer of task */
  69     WORD      nEvents;                    /* 06 Events for this task */
  70     INT16     priority;                   /* 08 Task priority, -32..15 */
  71     WORD      unused1;                    /* 0a */
  72     HTASK16   hSelf;                      /* 0c Selector of this TDB */
  73     HANDLE16  hPrevInstance;              /* 0e Previous instance of module */
  74     DWORD     unused2;                    /* 10 */
  75     WORD      ctrlword8087;               /* 14 80x87 control word */
  76     WORD      flags;                      /* 16 Task flags */
  77     UINT16    error_mode;                 /* 18 Error mode (see SetErrorMode)*/
  78     WORD      version;                    /* 1a Expected Windows version */
  79     HANDLE16  hInstance;                  /* 1c Instance handle for task */
  80     HMODULE16 hModule;                    /* 1e Module handle */
  81     HQUEUE16  hQueue;                     /* 20 Selector of task queue */
  82     HTASK16   hParent;                    /* 22 Selector of TDB of parent */
  83     WORD      signal_flags;               /* 24 Flags for signal handler */
  84     FARPROC16 sighandler WINE_PACKED;     /* 26 Signal handler */
  85     FARPROC16 userhandler WINE_PACKED;    /* 2a USER signal handler */
  86     FARPROC16 discardhandler WINE_PACKED; /* 2e Handler for GlobalNotify() */
  87     DWORD     int0 WINE_PACKED;           /* 32 int 0 (divide by 0) handler */
  88     DWORD     int2 WINE_PACKED;           /* 36 int 2 (NMI) handler */
  89     DWORD     int4 WINE_PACKED;           /* 3a int 4 (INTO) handler */
  90     DWORD     int6 WINE_PACKED;           /* 3e int 6 (invalid opc) handler */
  91     DWORD     int7 WINE_PACKED;           /* 42 int 7 (coprocessor) handler */
  92     DWORD     int3e WINE_PACKED;          /* 46 int 3e (80x87 emu) handler */
  93     DWORD     int75 WINE_PACKED;          /* 4a int 75 (80x87 error) handler */
  94     DWORD     compat_flags WINE_PACKED;   /* 4e Compatibility flags */
  95     BYTE      unused4[2];                 /* 52 */
  96     struct _TEB *teb;                     /* 54 Pointer to thread database */
  97     BYTE      unused5[8];                 /* 58 */
  98     HANDLE16  hPDB;                       /* 60 Selector of PDB (i.e. PSP) */
  99     SEGPTR    dta WINE_PACKED;            /* 62 Current DTA */
 100     BYTE      curdrive;                   /* 66 Current drive */
 101     BYTE      curdir[65];                 /* 67 Current directory */
 102     WORD      nCmdShow;                   /* a8 cmdShow parameter to WinMain */
 103     HTASK16   hYieldTo;                   /* aa Next task to schedule */
 104     DWORD     dlls_to_init;               /* ac Ptr to DLLs to initialize */
 105     HANDLE16  hCSAlias;                   /* b0 Code segment for this TDB */
 106     THUNKS    thunks WINE_PACKED;         /* b2 Make proc instance thunks */
 107     WORD      more_thunks[6*4];           /* c2 Space for 6 more thunks */
 108     BYTE      module_name[8];             /* f2 Module name for task */
 109     WORD      magic;                      /* fa TDB signature */
 110     HANDLE    hEvent;                     /* fc scheduler event handle */
 111     PDB16     pdb;                        /* 100 PDB for this task */
 112 } TDB;
 113
 114 #define TDB_MAGIC    ('T' | ('D' << 8))
 115
 116   /* TDB flags */
 117 #define TDBF_WINOLDAP   0x0001
 118 #define TDBF_OS2APP     0x0008
 119 #define TDBF_WIN32      0x0010
 120
 121   /* Windows 3.1 USER signals */
 122 #define USIG16_TERMINATION      0x0020
 123 #define USIG16_DLL_LOAD         0x0040
 124 #define USIG16_DLL_UNLOAD       0x0080
 125 #define USIG16_GPF              0x0666
 126
 127
 128   /* THHOOK Kernel Data Structure */
 129 typedef struct _THHOOK
 130 {
 131     HANDLE16   hGlobalHeap;         /* 00 (handle BURGERMASTER) */
 132     WORD       pGlobalHeap;         /* 02 (selector BURGERMASTER) */
 133     HMODULE16  hExeHead;            /* 04 hFirstModule */
 134     HMODULE16  hExeSweep;           /* 06 (unused) */
 135     HANDLE16   TopPDB;              /* 08 (handle of KERNEL PDB) */
 136     HANDLE16   HeadPDB;             /* 0A (first PDB in list) */
 137     HANDLE16   TopSizePDB;          /* 0C (unused) */
 138     HTASK16    HeadTDB;             /* 0E hFirstTask */
 139     HTASK16    CurTDB;              /* 10 hCurrentTask */
 140     HTASK16    LoadTDB;             /* 12 (unused) */
 141     HTASK16    LockTDB;             /* 14 hLockedTask */
 142 } THHOOK;
 143
 144 #include "poppack.h"
 145
 146 extern THHOOK *pThhook;
 147
 148 extern BOOL TASK_Create( struct _NE_MODULE *pModule, UINT16 cmdShow,
 149                          struct _TEB *teb, LPCSTR cmdline, BYTE len );
 150 extern void TASK_ExitTask(void);
 151 extern HTASK16 TASK_GetNextTask( HTASK16 hTask );
 152 extern void TASK_Reschedule(void);
 153 extern void TASK_InstallTHHook( THHOOK *pNewThook );
 154 extern void TASK_CallTaskSignalProc( UINT16 uCode, HANDLE16 hTaskOrModule );
 155
 156 #endif /* __WINE_TASK_H */