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 "wintypes.h"
  11
  12 #ifndef WINELIB
  13 #pragma pack(1)
  14 #endif
  15
  16
  17 extern BOOL TASK_Init(void);
  18 extern void TASK_KillCurrentTask( int exitCode );
  19
  20   /* Process database (i.e. a normal DOS PSP) */
  21
  22 typedef struct
  23 {
  24     WORD   int20;                   /* 00 int 20h instruction */
  25     WORD   nextParagraph;           /* 02 Segment of next paragraph */
  26     BYTE   reserved1;
  27     BYTE   dispatcher[5];           /* 05 Long call to DOS */
  28     SEGPTR savedint22 WINE_PACKED;  /* 0a Saved int 22h handler */
  29     SEGPTR savedint23 WINE_PACKED;  /* 0e Saved int 23h handler */
  30     SEGPTR savedint24 WINE_PACKED;  /* 12 Saved int 24h handler */
  31     WORD   parentPSP;               /* 16 Selector of parent PSP */
  32     BYTE   fileHandles[20];         /* 18 Open file handles */
  33     HANDLE environment;             /* 2c Selector of environment */
  34     WORD   reserved2[2];
  35     WORD   nbFiles;                 /* 32 Number of file handles */
  36     SEGPTR fileHandlesPtr;          /* 34 Pointer to file handle table */
  37     WORD   reserved3[18];
  38     BYTE   fcb1[16];                /* 5c First FCB */
  39     BYTE   fcb2[20];                /* 6c Second FCB */
  40     BYTE   cmdLine[128];            /* 80 Command-line (first byte is len) */
  41 } PDB;
  42
  43
  44   /* Segment containing MakeProcInstance() thunks */
  45 typedef struct
  46 {
  47     WORD  next;       /* Selector of next segment */
  48     WORD  magic;      /* Thunks signature */
  49     WORD  unused;
  50     WORD  free;       /* Head of the free list */
  51     WORD  thunks[4];  /* Each thunk is 4 words long */
  52 } THUNKS;
  53
  54 #define THUNK_MAGIC  ('P' | ('T' << 8))
  55
  56
  57   /* Task database. See 'Windows Internals' p. 226 */
  58 typedef struct
  59 {
  60     HTASK   hNext;                      /* Selector of next TDB */
  61     WORD    sp;                         /* Stack pointer of task */
  62     WORD    ss;                         /* Stack segment of task */
  63     WORD    nEvents;                    /* Events for this task */
  64     char    priority;                   /* Task priority, between -32 and 15 */
  65     BYTE    unused1;
  66     HGLOBAL hStack32;                   /* Handle to 32-bit stack */
  67     HTASK   hSelf;                      /* Selector of this TDB */
  68     HANDLE  hPrevInstance;              /* Previous instance of the module */
  69     DWORD   esp;                        /* 32-bit stack pointer */
  70     WORD    ctrlword8087;               /* 80x87 control word */
  71     WORD    flags;                      /* Task flags */
  72     UINT    error_mode;                 /* Error mode (see SetErrorMode) */
  73     WORD    version;                    /* Expected Windows version */
  74     HANDLE  hInstance;                  /* Instance handle for this task */
  75     HMODULE hModule;                    /* Module handle */
  76     HQUEUE  hQueue;                     /* Selector of task message queue */
  77     HTASK   hParent;                    /* Selector of TDB of parent task */
  78     WORD    signal_flags;               /* Flags related to signal handler */
  79     DWORD   sighandler WINE_PACKED;     /* Signal handler */
  80     DWORD   userhandler WINE_PACKED;    /* USER signal handler */
  81     DWORD   discardhandler WINE_PACKED; /* Handler for GlobalDiscard() */
  82     DWORD   int0 WINE_PACKED;           /* int 0 (divide by zero) handler */
  83     DWORD   int2 WINE_PACKED;           /* int 2 (NMI) handler */
  84     DWORD   int4 WINE_PACKED;           /* int 4 (INTO) handler */
  85     DWORD   int6 WINE_PACKED;           /* int 6 (invalid opcode) handler */
  86     DWORD   int7 WINE_PACKED;           /* int 7 (coprocessor) handler */
  87     DWORD   int3e WINE_PACKED;          /* int 3e (80x87 emulator) handler */
  88     DWORD   int75 WINE_PACKED;          /* int 75 (80x87 error) handler */
  89     DWORD   compat_flags WINE_PACKED;   /* Compatibility flags */
  90     BYTE    unused4[14];
  91     HANDLE  hPDB;                       /* Selector of PDB (i.e. PSP) */
  92     SEGPTR  dta WINE_PACKED;            /* Current DTA */
  93     BYTE    curdrive;                   /* Current drive */
  94     BYTE    curdir[65];                 /* Current directory */
  95     WORD    nCmdShow;                   /* cmdShow parameter to WinMain */
  96     HTASK   hYieldTo;                   /* Next task to schedule */
  97     DWORD   dlls_to_init;               /* Ptr to list of DLL to initialize */
  98     HANDLE  hCSAlias;                   /* Code segment alias for this TDB */
  99     THUNKS  thunks WINE_PACKED;         /* Make proc instance thunks */
 100     WORD    more_thunks[6*4];           /* Space for 6 more thunks */
 101     BYTE    module_name[8];             /* Module name for task */
 102     WORD    magic;                      /* TDB signature */
 103     DWORD   unused7;
 104     PDB     pdb;                        /* PDB for this task */
 105 } TDB;
 106
 107 #define TDB_MAGIC    ('T' | ('D' << 8))
 108
 109   /* TDB flags */
 110 #define TDBF_WINOLDAP   0x0001
 111 #define TDBF_OS2APP     0x0008
 112 #define TDBF_WIN32S     0x0010
 113
 114 #ifndef WINELIB
 115 #pragma pack(4)
 116 #endif
 117
 118 extern HTASK TASK_CreateTask( HMODULE hModule, HANDLE hInstance,
 119                               HANDLE hPrevInstance, HANDLE hEnvironment,
 120                               char *cmdLine, WORD cmdShow );
 121
 122   /* TASK_Reschedule() 16-bit entry point */
 123 extern FARPROC RELAY_RescheduleProcAddr;
 124
 125 #endif /* _WINE_TASK_H */