101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
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//+----------------------------------------------------------------------------
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//
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// File: linkdll.cpp
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//
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// Module: Common Code
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//
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// Synopsis: Implementation of linkage functions LinkToDll and BindLinkage
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//
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// Copyright (c) 1999 Microsoft Corporation
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//
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// Author: quintinb created header 08/19/99
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//
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//+----------------------------------------------------------------------------
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//+----------------------------------------------------------------------------
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//
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// Function: LinkToDll
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//
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// Synopsis: Helper function to manage the process of linking to a DLL and
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// settings up a function table for later use.
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//
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// Arguments: HINSTANCE *phInst - A ptr to an hInst to be filled with the hInst of the DLL to be linked.
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// LPCTSTR pszDll - Ptr to the name of the DLL to be linked.
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// LPCSTR *ppszPfn - Ptr to a table of function names to be retrieved.
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// void **ppvPfn - Ptr to table for storage of pointers to DLL functions used.
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//
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// Returns: BOOL - TRUE if fully loaded and linked.
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//
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// History: nickball Created Header 1/5/98
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//
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//+----------------------------------------------------------------------------
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BOOL LinkToDll(HINSTANCE *phInst, LPCSTR pszDll, LPCSTR *ppszPfn, void **ppvPfn)
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{
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MYDBGASSERT(phInst);
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MYDBGASSERT(pszDll);
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MYDBGASSERT(ppszPfn);
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MYDBGASSERT(ppvPfn);
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CMTRACE1A("LinkToDll - Loading library - %s", pszDll);
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*phInst = LoadLibraryExA(pszDll, NULL, 0);
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if (!*phInst)
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{
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CMTRACE3A("LinkToDll[phInst=%p, *pszDll=%s, ppszPfn=%p,", phInst, MYDBGSTRA(pszDll), ppszPfn);
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CMTRACE1A("\tppvPfn=%p] LoadLibrary() failed.", ppvPfn);
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return FALSE;
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}
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//
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// Link succeeded now setup function addresses
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//
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return BindLinkage(*phInst, ppszPfn, ppvPfn);
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}
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//+----------------------------------------------------------------------------
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//
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// Function: BindLinkage
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//
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// Synopsis: Helper function to fill in the given function pointer table with
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// the addresses of the functions specified in the given string table.
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// Function addresses are retrieved from the DLL specified by hInst.
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//
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// Arguments: HINSTANCE hInstDll - The hInst of the DLL.
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// LPCSTR *ppszPfn - Ptr to a table of function names.
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// void **ppvPfn - Ptr to a table of function pointers to be filled in.
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//
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// Returns: BOOL - TRUE if all addresses were successfully retrieved.
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//
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// History: nickball Created 1/5/98
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//
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//+----------------------------------------------------------------------------
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BOOL BindLinkage(HINSTANCE hInstDll, LPCSTR *ppszPfn, void **ppvPfn)
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{
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MYDBGASSERT(ppszPfn);
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MYDBGASSERT(ppvPfn);
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UINT nIdxPfn;
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BOOL bAllLoaded = TRUE;
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for (nIdxPfn=0;ppszPfn[nIdxPfn];nIdxPfn++)
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{
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if (!ppvPfn[nIdxPfn])
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{
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ppvPfn[nIdxPfn] = GetProcAddress(hInstDll, ppszPfn[nIdxPfn]);
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if (!ppvPfn[nIdxPfn])
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{
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CMTRACE3(TEXT("BindLinkage(hInstDll=%d,ppszPfn=%p,ppvPfn=%p)"), hInstDll, ppszPfn, ppvPfn);
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CMTRACE3(TEXT("\tGetProcAddress(hInstDll=%d,*pszProc=%S) failed, GLE=%u."), hInstDll, ppszPfn[nIdxPfn], GetLastError());
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bAllLoaded = FALSE;
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}
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}
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}
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return (bAllLoaded);
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}
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