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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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vc98
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mfc
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src
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olecall.cpp
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C/C++ Source or Header
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1998-06-16
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// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.
#include "stdafx.h"
#ifdef AFX_OLE5_SEG
#pragma code_seg(AFX_OLE5_SEG)
#endif
// Note: because of the nature of these functions, it is not possible
// to create a 'C' or 'C++' version of them. These functions are used
// for the lowest level of the OLE IDispatch implementation, and need
// to be ported to each supported platform.
extern "C" {
/////////////////////////////////////////////////////////////////////////////
// Intel 386 version
#ifdef _X86_
__declspec(naked) void AFXAPI
_AfxDispatchCall(AFX_PMSG /*pfn*/, void* /*pArgs*/, UINT /*nSizeArgs*/)
{
_asm
{
pop edx // edx = return address
pop eax // eax = pfn
pop ecx // ecx = pArgs
add ecx,[esp] // ecx += nSizeArgs (=scratch area)
mov [ecx],edx // scratch[0] = return address
sub ecx,[esp] // ecx = pArgs (again)
mov esp,ecx // esp = pArgs (usually already correct)
pop ecx // ecx = this pointer (the CCmdTarget*)
call eax // call member function
ret // esp[0] should = scratch[0] = return address
}
}
#endif // _X86_
/////////////////////////////////////////////////////////////////////////////
// MIPS R4000 version
#ifdef _MIPS_
extern "C" void _asm(char *, ...);
void AFXAPI
_AfxDispatchCall(AFX_PMSG /*pfn*/, void* /*pArgs*/, UINT /*nSizeArgs*/)
{
_asm("addiu %sp,%a1,0x0"); // sp = pArgs
_asm("addiu %t6,%a0,0x0"); // t6 = pfn (save it)
_asm("lw %a0,0x0(%sp)"); // a0 = param0
_asm("lw %a1,0x4(%sp)"); // a1 = param1
_asm("lw %a2,0x8(%sp)"); // a2 = param2
_asm("lw %a3,0xc(%sp)"); // a3 = param3
_asm("j %t6"); // ip = pfn (jump to target function)
}
#endif // _MIPS_
/////////////////////////////////////////////////////////////////////////////
// DEC Alpha AXP version
#ifdef _ALPHA_
// Note: ALPHA version is in src\alpha\olecall_.s
// The ALPHA compiler does not support inline assembly, so it
// must be build separately with the ASAXP assembler.
#endif // _ALPHA_
} // end extern "C" block
/////////////////////////////////////////////////////////////////////////////