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| author | madmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6> | 2013-02-03 21:37:13 +0100 |
|---|---|---|
| committer | madmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6> | 2013-02-03 21:37:13 +0100 |
| commit | 2c214603e29f728804cd88522a1097de803ab321 (patch) | |
| tree | a44010a49f1ef59b727982344c04aa8935d97564 /BiomeVisualiser/WndProcThunk.h | |
| parent | Added a GetClassStatic function to all entities, as well as cFurnaceEntity, cChestEntity and cWorld (diff) | |
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Diffstat (limited to 'BiomeVisualiser/WndProcThunk.h')
| -rw-r--r-- | BiomeVisualiser/WndProcThunk.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/BiomeVisualiser/WndProcThunk.h b/BiomeVisualiser/WndProcThunk.h new file mode 100644 index 000000000..6f33b5c3f --- /dev/null +++ b/BiomeVisualiser/WndProcThunk.h @@ -0,0 +1,143 @@ +
+// WndProcThunk.h
+
+// Interfaces to the CWndProcThunk class responsible for WNDPROC class-thunking
+// For details, see http://www.hackcraft.net/cpp/windowsThunk/thiscall/
+// Also available is a CDlgProcThunk class doing the same work for DIALOGPROC
+
+// MD: Made NX-compat by allocating the code structure using VirtualAlloc(..., PAGE_EXECUTE_READWRITE)
+
+
+
+
+
+// fwd:
+template <class W> class CWndProcThunk;
+
+
+
+
+
+#ifndef WNDPROCTHUNK_H_INCLUDED
+#define WNDPROCTHUNK_H_INCLUDED
+
+
+
+
+template<typename To, typename From> inline To union_cast(From fr) throw()
+{
+ union
+ {
+ From f;
+ To t;
+ } uc;
+ uc.f = fr;
+ return uc.t;
+}
+
+
+
+
+
+#pragma warning(push)
+#pragma warning(disable : 4355)
+
+#if defined(_M_IX86)
+
+#pragma pack(push,1)
+
+template <class W> class CWndProcThunk
+{
+ typedef ::LRESULT (W::* WndProc)(::HWND, ::UINT, ::WPARAM, ::LPARAM);
+ typedef CWndProcThunk ThisClass;
+
+ struct SCode
+ {
+ BYTE m_mov; // mov ECX, m_this
+ W * m_this; //
+ BYTE m_jmp; // jmp m_relproc
+ ptrdiff_t m_relproc; // relative jmp
+ };
+
+ SCode * Code;
+
+public:
+ ThisClass(WndProc proc, W * obj)
+ {
+ Code = (SCode *)VirtualAlloc(NULL, sizeof(SCode), MEM_COMMIT, PAGE_EXECUTE_READWRITE);
+ Code->m_mov = 0xB9,
+ Code->m_this = obj,
+ Code->m_jmp = 0xE9,
+ Code->m_relproc = union_cast<char *>(proc) - reinterpret_cast<char *>(Code) - sizeof(*Code);
+ ::FlushInstructionCache(::GetCurrentProcess(), Code, sizeof(*Code));
+ }
+
+ virtual ~CWndProcThunk()
+ {
+ VirtualFree(Code, sizeof(*Code), MEM_RELEASE);
+ Code = NULL;
+ }
+
+ operator ::WNDPROC() const {return reinterpret_cast<::WNDPROC>(Code); }
+ operator ::LONG_PTR() const {return reinterpret_cast<::LONG_PTR>(Code); }
+} ;
+
+
+
+
+
+template <class W> class CDlgProcThunk
+{
+ typedef ::BOOL (W::* DlgProc)(::HWND, ::UINT, ::WPARAM, ::LPARAM);
+ typedef CDlgProcThunk ThisClass;
+
+ struct SCode
+ {
+ BYTE m_mov; // mov ECX, m_this
+ W * m_this; //
+ BYTE m_jmp; // jmp m_relproc
+ ptrdiff_t m_relproc; // relative jmp
+ };
+
+ SCode * Code;
+
+public:
+ CDlgProcThunk(DlgProc proc, W * obj)
+ {
+ Code = (SCode *)VirtualAlloc(NULL, sizeof(SCode), MEM_COMMIT, PAGE_EXECUTE_READWRITE);
+ Code->m_mov = 0xB9,
+ Code->m_this = obj,
+ Code->m_jmp = 0xE9,
+ Code->m_relproc = union_cast<char *>(proc) - reinterpret_cast<char *>(Code) - sizeof(*Code);
+ ::FlushInstructionCache(::GetCurrentProcess(), Code, sizeof(*Code));
+ }
+
+ virtual ~CDlgProcThunk()
+ {
+ VirtualFree(Code, sizeof(*Code), MEM_RELEASE);
+ Code = NULL;
+ }
+
+ operator ::DLGPROC() const {return reinterpret_cast<::DLGPROC>(Code); }
+ operator ::LONG_PTR() const {return reinterpret_cast<::LONG_PTR>(Code); }
+} ;
+
+
+
+
+
+ #pragma pack(pop)
+
+#else // _M_IX86
+ #error Only X86 supported
+#endif
+
+
+
+
+
+#endif // WNDPROCTHUNK_H_INCLUDED
+
+
+
+
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