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   /* Process database (i.e. a normal DOS PSP) */
  17
  18 typedef struct
  19 {
  20     WORD   int20;            /* int 20h instruction */
  21     WORD   nextParagraph;    /* Segment of next paragraph */
  22     BYTE   reserved1;
  23     BYTE   dispatcher[5];    /* Long call to DOS */
  24     DWORD  savedint22;       /* Saved int 22h handler */
  25     DWORD  savedint23;       /* Saved int 23h handler */
  26     DWORD  savedint24;       /* Saved int 24h handler */
  27     WORD   parentPSP;        /* Selector of parent PSP */
  28     BYTE   fileHandles[20];  /* Open file handles */
  29     HANDLE environment;      /* Selector of environment */
  30     WORD   reserved2[23];
  31     BYTE   fcb1[16];         /* First FCB */
  32     BYTE   fcb2[20];         /* Second FCB */
  33     BYTE   cmdLine[128];     /* Command-line (first byte is length) */
  34 } PDB;
  35
  36
  37   /* Segment containing MakeProcInstance() thunks */
  38 typedef struct
  39 {
  40     WORD  next;       /* Selector of next segment */
  41     WORD  magic;      /* Thunks signature */
  42     WORD  unused;
  43     WORD  free;       /* Head of the free list */
  44     WORD  thunks[4];  /* Each thunk is 4 words long */
  45 } THUNKS;
  46
  47 #define THUNK_MAGIC  ('P' | ('T' << 8))
  48
  49
  50   /* Task database. See 'Windows Internals' p. 226 */
  51 typedef struct
  52 {
  53     HTASK   hNext;                      /* Selector of next TDB */
  54     WORD    sp;                         /* Stack pointer of task */
  55     WORD    ss;                         /* Stack segment of task */
  56     WORD    nEvents;                    /* Events for this task */
  57     char    priority;                   /* Task priority, between -32 and 15 */
  58     BYTE    unused1;
  59     HGLOBAL hStack32;                   /* Handle to 32-bit stack */
  60     WORD    hSelf;                      /* Selector of this TDB */
  61     WORD    unused3;
  62     DWORD   esp;                        /* 32-bit stack pointer */
  63     WORD    ctrlword8087;               /* 80x87 control word */
  64     WORD    flags;                      /* Task flags */
  65     WORD    error_flags;                /* Error handling flags */
  66     WORD    version;                    /* Expected Windows version */
  67     HANDLE  hInstance;                  /* Instance handle  for this task */
  68     HMODULE hModule;                    /* Module handle */
  69     HANDLE  hQueue;                     /* Selector of task message queue */
  70     HTASK   hParent;                    /* Selector of TDB of parent task */
  71     WORD    signal_flags;               /* Flags related to signal handler */
  72     DWORD   sighandler WINE_PACKED;     /* Signal handler */
  73     DWORD   userhandler WINE_PACKED;    /* USER signal handler */
  74     DWORD   discardhandler WINE_PACKED; /* Handler for GlobalDiscard() */
  75     DWORD   int0 WINE_PACKED;           /* int 0 (divide by zero) handler */
  76     DWORD   int2 WINE_PACKED;           /* int 2 (NMI) handler */
  77     DWORD   int4 WINE_PACKED;           /* int 4 (INTO) handler */
  78     DWORD   int6 WINE_PACKED;           /* int 6 (invalid opcode) handler */
  79     DWORD   int7 WINE_PACKED;           /* int 7 (coprocessor) handler */
  80     DWORD   int3e WINE_PACKED;          /* int 3e (80x87 emulator) handler */
  81     DWORD   int75 WINE_PACKED;          /* int 75 (80x87 error) handler */
  82     DWORD   compat_flags WINE_PACKED;   /* Compatibility flags */
  83     BYTE    unused4[14];
  84     HANDLE  hPDB;                       /* Selector of PDB (i.e. PSP) */
  85     DWORD   dta WINE_PACKED;            /* Current DTA */
  86     BYTE    curdrive;                   /* Current drive */
  87     BYTE    curdir[65];                 /* Current directory */
  88     WORD    unused5;
  89     HTASK   hYieldTo;                   /* Next task to schedule */
  90     DWORD   dlls_to_init;               /* Ptr to list of DLL to initialize */
  91     HANDLE  hCSAlias;                   /* Code segment alias for this TDB */
  92     THUNKS  thunks WINE_PACKED;         /* Make proc instance thunks */
  93     WORD    more_thunks[6*4];           /* Space for 6 more thunks */
  94     BYTE    module_name[8];             /* Module name for task */
  95     WORD    magic;                      /* TDB signature */
  96     DWORD   unused7;
  97     PDB     pdb;                        /* PDB for this task */
  98 } TDB;
  99
 100 #define TDB_MAGIC    ('T' | ('D' << 8))
 101
 102   /* TDB flags */
 103 #define TDBF_WINOLDAP   0x0001
 104 #define TDBF_OS2APP     0x0008
 105 #define TDBF_WIN32S     0x0010
 106
 107 #ifndef WINELIB
 108 #pragma pack(4)
 109 #endif
 110
 111   /* TASK_Reschedule() 16-bit entry point */
 112 extern FARPROC RELAY_RescheduleProcAddr;
 113
 114 #endif /* _WINE_TASK_H */