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