261 lines
9.6 KiB
C
261 lines
9.6 KiB
C
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/*++ BUILD Version: 0001 // Increment this if a change has global effects
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Copyright (c) 1995-1999, Microsoft Corporation
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Module Name:
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wownt32.h
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Abstract:
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Procedure declarations for functions in WOW32.DLL callable by
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3rd-party 32-bit thunking code.
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--*/
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#ifndef _WOWNT32_
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#define _WOWNT32_
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#if defined(_MSC_VER)
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#if _MSC_VER > 1000
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#pragma once
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#endif
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#endif
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//
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// 16:16 -> 0:32 Pointer translation.
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//
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// WOWGetVDMPointer will convert the passed in 16-bit address
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// to the equivalent 32-bit flat pointer. If fProtectedMode
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// is TRUE, the function treats the upper 16 bits as a selector
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// in the local descriptor table. If fProtectedMode is FALSE,
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// the upper 16 bits are treated as a real-mode segment value.
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// In either case the lower 16 bits are treated as the offset.
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//
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// The return value is NULL if the selector is invalid.
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//
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// NOTE: Limit checking is not performed in the retail build
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// of Windows NT. It is performed in the checked (debug) build
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// of WOW32.DLL, which will cause NULL to be returned when the
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// limit is exceeded by the supplied offset.
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//
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LPVOID WINAPI WOWGetVDMPointer(DWORD vp, DWORD dwBytes,
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BOOL fProtectedMode);
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//
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// The following two functions are here for compatibility with
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// Windows 95. On Win95, the global heap can be rearranged,
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// invalidating flat pointers returned by WOWGetVDMPointer, while
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// a thunk is executing. On Windows NT, the 16-bit VDM is completely
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// halted while a thunk executes, so the only way the heap will
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// be rearranged is if a callback is made to Win16 code.
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//
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// The Win95 versions of these functions call GlobalFix to
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// lock down a segment's flat address, and GlobalUnfix to
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// release the segment.
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//
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// The Windows NT implementations of these functions do *not*
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// call GlobalFix/GlobalUnfix on the segment, because there
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// will not be any heap motion unless a callback occurs.
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// If your thunk does callback to the 16-bit side, be sure
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// to discard flat pointers and call WOWGetVDMPointer again
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// to be sure the flat address is correct.
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//
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LPVOID WINAPI WOWGetVDMPointerFix(DWORD vp, DWORD dwBytes,
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BOOL fProtectedMode);
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VOID WINAPI WOWGetVDMPointerUnfix(DWORD vp);
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//
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// Win16 memory management.
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//
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// These functions can be used to manage memory in the Win16
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// heap. The following four functions are identical to their
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// Win16 counterparts, except that they are called from Win32
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// code.
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//
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WORD WINAPI WOWGlobalAlloc16(WORD wFlags, DWORD cb);
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WORD WINAPI WOWGlobalFree16(WORD hMem);
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DWORD WINAPI WOWGlobalLock16(WORD hMem);
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BOOL WINAPI WOWGlobalUnlock16(WORD hMem);
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//
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// The following three functions combine two common operations in
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// one switch to 16-bit mode.
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//
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DWORD WINAPI WOWGlobalAllocLock16(WORD wFlags, DWORD cb, WORD *phMem);
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WORD WINAPI WOWGlobalUnlockFree16(DWORD vpMem);
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DWORD WINAPI WOWGlobalLockSize16(WORD hMem, PDWORD pcb);
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//
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// Yielding the Win16 nonpreemptive scheduler
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//
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// The following two functions are provided for Win32 code called
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// via Generic Thunks which needs to yield the Win16 scheduler so
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// that tasks in that VDM can execute while the thunk waits for
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// something to complete. These two functions are functionally
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// identical to calling back to 16-bit code which calls Yield or
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// DirectedYield.
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//
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VOID WINAPI WOWYield16(VOID);
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VOID WINAPI WOWDirectedYield16(WORD htask16);
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//
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// 16 <--> 32 Handle mapping functions.
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//
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// NOTE: While some of these functions perform trivial
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// conversions, these functions must be used to maintain
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// compatibility with future versions of Windows NT which
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// may require different handle mapping.
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//
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typedef enum _WOW_HANDLE_TYPE { /* WOW */
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WOW_TYPE_HWND,
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WOW_TYPE_HMENU,
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WOW_TYPE_HDWP,
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WOW_TYPE_HDROP,
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WOW_TYPE_HDC,
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WOW_TYPE_HFONT,
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WOW_TYPE_HMETAFILE,
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WOW_TYPE_HRGN,
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WOW_TYPE_HBITMAP,
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WOW_TYPE_HBRUSH,
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WOW_TYPE_HPALETTE,
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WOW_TYPE_HPEN,
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WOW_TYPE_HACCEL,
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WOW_TYPE_HTASK,
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WOW_TYPE_FULLHWND
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} WOW_HANDLE_TYPE;
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HANDLE WINAPI WOWHandle32 (WORD, WOW_HANDLE_TYPE);
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WORD WINAPI WOWHandle16 (HANDLE, WOW_HANDLE_TYPE);
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#define HWND_32(h16) ((HWND) (WOWHandle32(h16, WOW_TYPE_HWND)))
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#define HMENU_32(h16) ((HMENU) (WOWHandle32(h16, WOW_TYPE_HMENU)))
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#define HDWP_32(h16) ((HDWP) (WOWHandle32(h16, WOW_TYPE_HDWP)))
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#define HDROP_32(h16) ((HDROP) (WOWHandle32(h16, WOW_TYPE_HDROP)))
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#define HDC_32(h16) ((HDC) (WOWHandle32(h16, WOW_TYPE_HDC)))
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#define HFONT_32(h16) ((HFONT) (WOWHandle32(h16, WOW_TYPE_HFONT)))
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#define HMETAFILE_32(h16) ((HMETAFILE) (WOWHandle32(h16, WOW_TYPE_HMETAFILE)))
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#define HRGN_32(h16) ((HRGN) (WOWHandle32(h16, WOW_TYPE_HRGN)))
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#define HBITMAP_32(h16) ((HBITMAP) (WOWHandle32(h16, WOW_TYPE_HBITMAP)))
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#define HBRUSH_32(h16) ((HBRUSH) (WOWHandle32(h16, WOW_TYPE_HBRUSH)))
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#define HPALETTE_32(h16) ((HPALETTE) (WOWHandle32(h16, WOW_TYPE_HPALETTE)))
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#define HPEN_32(h16) ((HPEN) (WOWHandle32(h16, WOW_TYPE_HPEN)))
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#define HACCEL_32(h16) ((HACCEL) (WOWHandle32(h16, WOW_TYPE_HACCEL)))
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#define HTASK_32(h16) ((DWORD) (WOWHandle32(h16, WOW_TYPE_HTASK)))
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#define FULLHWND_32(h16) ((HWND) (WOWHandle32(h16, WOW_TYPE_FULLHWND)))
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#define HWND_16(h32) (WOWHandle16(h32, WOW_TYPE_HWND))
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#define HMENU_16(h32) (WOWHandle16(h32, WOW_TYPE_HMENU))
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#define HDWP_16(h32) (WOWHandle16(h32, WOW_TYPE_HDWP))
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#define HDROP_16(h32) (WOWHandle16(h32, WOW_TYPE_HDROP))
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#define HDC_16(h32) (WOWHandle16(h32, WOW_TYPE_HDC))
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#define HFONT_16(h32) (WOWHandle16(h32, WOW_TYPE_HFONT))
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#define HMETAFILE_16(h32) (WOWHandle16(h32, WOW_TYPE_HMETAFILE))
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#define HRGN_16(h32) (WOWHandle16(h32, WOW_TYPE_HRGN))
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#define HBITMAP_16(h32) (WOWHandle16(h32, WOW_TYPE_HBITMAP))
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#define HBRUSH_16(h32) (WOWHandle16(h32, WOW_TYPE_HBRUSH))
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#define HPALETTE_16(h32) (WOWHandle16(h32, WOW_TYPE_HPALETTE))
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#define HPEN_16(h32) (WOWHandle16(h32, WOW_TYPE_HPEN))
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#define HACCEL_16(h32) (WOWHandle16(h32, WOW_TYPE_HACCEL))
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#define HTASK_16(h32) (WOWHandle16(h32, WOW_TYPE_HTASK))
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//
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// Generic Callbacks.
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//
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// WOWCallback16 can be used in Win32 code called
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// from 16-bit (such as by using Generic Thunks) to call back to
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// the 16-bit side. The function called must be declared similarly
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// to the following:
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//
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// LONG FAR PASCAL CallbackRoutine(DWORD dwParam);
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//
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// If you are passing a pointer, declare the parameter as such:
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//
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// LONG FAR PASCAL CallbackRoutine(VOID FAR *vp);
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//
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// NOTE: If you are passing a pointer, you'll need to get the
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// pointer using WOWGlobalAlloc16 or WOWGlobalAllocLock16
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//
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// If the function called returns a WORD instead of a DWORD, the
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// upper 16 bits of the return value is undefined. Similarly, if
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// the function called has no return value, the entire return value
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// is undefined.
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//
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// WOWCallback16Ex allows any combination of arguments up to
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// WCB16_MAX_CBARGS bytes total to be passed to the 16-bit routine.
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// cbArgs is used to properly clean up the 16-bit stack after calling
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// the routine. Regardless of the value of cbArgs, WCB16_MAX_CBARGS
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// bytes will always be copied from pArgs to the 16-bit stack. If
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// pArgs is less than WCB16_MAX_CBARGS bytes from the end of a page,
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// and the next page is inaccessible, WOWCallback16Ex will incur an
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// access violation.
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//
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// If cbArgs is larger than the WCB16_MAX_ARGS which the running
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// system supports, the function returns FALSE and GetLastError
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// returns ERROR_INVALID_PARAMETER. Otherwise the function
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// returns TRUE and the DWORD pointed to by pdwRetCode contains
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// the return code from the callback routine. If the callback
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// routine returns a WORD, the HIWORD of the return code is
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// undefined and should be ignored using LOWORD(dwRetCode).
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//
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// WOWCallback16Ex can call routines using the PASCAL and CDECL
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// calling conventions. The default is to use the PASCAL
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// calling convention. To use CDECL, pass WCB16_CDECL in the
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// dwFlags parameter.
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//
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// The arguments pointed to by pArgs must be in the correct
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// order for the callback routine's calling convention.
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// To call the PASCAL routine SetWindowText,
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//
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// LONG FAR PASCAL SetWindowText(HWND hwnd, LPCSTR lpsz);
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//
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// pArgs would point to an array of words:
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//
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// WORD SetWindowTextArgs[] = {OFFSETOF(lpsz), SELECTOROF(lpsz), hwnd};
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//
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// In other words, the arguments are placed in the array in reverse
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// order with the least significant word first for DWORDs and offset
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// first for FAR pointers.
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//
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// To call the CDECL routine wsprintf, for example
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//
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// LPSTR lpszFormat = "%d %s";
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// int _cdecl wsprintf(lpsz, lpszFormat, nValue. lpszString);
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//
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// pArgs would point to the array:
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//
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// WORD wsprintfArgs[] = {OFFSETOF(lpsz), SELECTOROF(lpsz),
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// OFFSETOF(lpszFormat), SELECTOROF(lpszFormat),
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// nValue,
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// OFFSETOF(lpszString), SELECTOROF(lpszString)};
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//
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// In other words, the arguments are placed in the array in the order
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// listed in the function prototype with the least significant word
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// first for DWORDs and offset first for FAR pointers.
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//
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DWORD WINAPI WOWCallback16(DWORD vpfn16, DWORD dwParam);
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#define WCB16_MAX_CBARGS (16)
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#define WCB16_PASCAL (0x0)
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#define WCB16_CDECL (0x1)
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BOOL WINAPI WOWCallback16Ex(
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DWORD vpfn16,
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DWORD dwFlags,
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DWORD cbArgs,
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PVOID pArgs,
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PDWORD pdwRetCode
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);
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#endif /* !_WOWNT32_ */
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