include/callback.h

   1 /*
   2  * Callback functions
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #ifndef __WINE_CALLBACK_H
   8 #define __WINE_CALLBACK_H
   9
  10 #include "windef.h"
  11 #include "winnt.h"
  12 #include "wingdi.h"
  13 #include "wine/winuser16.h"
  14
  15 extern void SYSDEPS_SwitchToThreadStack( void (*func)(void) ) WINE_NORETURN;
  16
  17 typedef void (*RELAY)();
  18 extern FARPROC THUNK_Alloc( FARPROC16 func, RELAY relay );
  19 extern void THUNK_Free( FARPROC thunk );
  20 extern BOOL THUNK_Init(void);
  21 extern void THUNK_InitCallout(void);
  22
  23
  24 typedef struct
  25 {
  26     WORD WINAPI     (*UserSignalProc)( UINT, DWORD, DWORD, HMODULE16 );
  27     WORD WINAPI     (*DestroyIcon32)( HGLOBAL16, UINT16 );
  28 }  CALLOUT_TABLE;
  29
  30 extern CALLOUT_TABLE Callout;
  31
  32
  33 typedef struct {
  34     struct _DOSTASK* WINAPI (*Current)( void );
  35     struct _DOSTASK* WINAPI (*LoadDPMI)( void );
  36     void WINAPI             (*LoadDosExe)( LPCSTR filename, HANDLE hFile );
  37     BOOL WINAPI             (*Exec)( CONTEXT86 *context, LPCSTR filename, BYTE func, LPVOID paramblk );
  38     void WINAPI             (*Exit)( CONTEXT86 *context, BOOL cs_psp, WORD retval );
  39     int WINAPI              (*Enter)( CONTEXT86 *context );
  40     void WINAPI             (*Wait)( int read_pipe, HANDLE hObject );
  41     void WINAPI             (*QueueEvent)( int irq, int priority, void (*relay)(CONTEXT86*,void*), void *data );
  42     void WINAPI             (*OutPIC)( WORD port, BYTE val );
  43     void WINAPI             (*SetTimer)( unsigned ticks );
  44     unsigned WINAPI         (*GetTimer)( void );
  45 } DOSVM_TABLE;
  46
  47 extern DOSVM_TABLE Dosvm;
  48
  49
  50 #include "pshpack1.h"
  51
  52 typedef struct tagTHUNK
  53 {
  54     BYTE             popl_eax;           /* 0x58  popl  %eax (return address)*/
  55     BYTE             pushl_func;         /* 0x68  pushl $proc */
  56     FARPROC16        proc WINE_PACKED;
  57     BYTE             pushl_eax;          /* 0x50  pushl %eax */
  58     BYTE             jmp;                /* 0xe9  jmp   relay (relative jump)*/
  59     RELAY            relay WINE_PACKED;
  60     struct tagTHUNK *next WINE_PACKED;
  61     DWORD            magic;
  62 } THUNK;
  63
  64 #include "poppack.h"
  65
  66 #define CALLTO16_THUNK_MAGIC 0x54484e4b   /* "THNK" */
  67
  68 #define DECL_THUNK(aname,aproc,arelay) \
  69     THUNK aname; \
  70     aname.popl_eax = 0x58; \
  71     aname.pushl_func = 0x68; \
  72     aname.proc = (FARPROC16) (aproc); \
  73     aname.pushl_eax = 0x50; \
  74     aname.jmp = 0xe9; \
  75     aname.relay = (RELAY)((char *)(arelay) - (char *)(&(aname).next)); \
  76     aname.next = NULL; \
  77     aname.magic = CALLTO16_THUNK_MAGIC;
  78
  79 #endif /* __WINE_CALLBACK_H */