112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
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// Thunks for calling PIFMGR.DLL from Shell32.dll
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// PifMgr_OpenProperties
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// PifMgr_CloseProperties
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// PifMgr_GetProperties
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// PifMgr_SetProperties
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// PIFMGR.DLL will be kept loaded as long as a PIF PROPERTIES handle is open and will be free'ed (via FreeLibrary) when the last handle is closed.
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#include "shprv.h"
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#include <pif.h>
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static HMODULE hPifMgrDll;
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static UINT cRef;
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static int (WINAPI *XOpenProperties)(LPCSTR lpszApp, LPCSTR lpszPIF, int hInf, int flOpt);
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static int (WINAPI *XGetProperties)(int hProps, LPCSTR lpszGroup, LPVOID lpProps, int cbProps, int flOpt);
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static int (WINAPI *XSetProperties)(int hProps, LPCSTR lpszGroup, const VOID FAR *lpProps, int cbProps, int flOpt);
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static int (WINAPI *XCloseProperties)(int hProps, int flOpt);
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static char szPifMgrDll[] = "PIFMGR.DLL";
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BOOL PifMgr_Load()
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{
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if (hPifMgrDll == NULL)
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{
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DebugMsg(DM_TRACE, "pif: Loading PIFMGR.DLL");
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hPifMgrDll = LoadLibrary(szPifMgrDll);
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if (hPifMgrDll <= HINSTANCE_ERROR)
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{
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hPifMgrDll = NULL;
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return FALSE;
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}
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(FARPROC)XOpenProperties = GetProcAddress(hPifMgrDll, MAKEINTATOM(ORD_OPENPROPERTIES));
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(FARPROC)XCloseProperties = GetProcAddress(hPifMgrDll, MAKEINTATOM(ORD_CLOSEPROPERTIES));
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(FARPROC)XGetProperties = GetProcAddress(hPifMgrDll, MAKEINTATOM(ORD_GETPROPERTIES));
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(FARPROC)XSetProperties = GetProcAddress(hPifMgrDll, MAKEINTATOM(ORD_SETPROPERTIES));
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}
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return TRUE;
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}
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void PifMgr_Free()
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{
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HMODULE h;
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if (cRef == 0 && (h=hPifMgrDll))
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{
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DebugMsg(DM_TRACE, "pif: Unloading PIFMGR.DLL");
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hPifMgrDll = NULL;
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FreeLibrary(h);
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XOpenProperties = NULL;
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XCloseProperties = NULL;
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XGetProperties = NULL;
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XSetProperties = NULL;
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}
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}
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int WINAPI PifMgr_OpenProperties(LPCSTR lpszApp, LPCSTR lpszPIF, int hInf, int flOpt)
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{
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int hpif=NULL;
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if (PifMgr_Load())
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{
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cRef++;
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hpif = XOpenProperties(lpszApp, lpszPIF, hInf, flOpt);
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if (hpif == NULL)
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cRef--;
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}
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return hpif;
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}
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int WINAPI PifMgr_GetProperties(int hProps, LPCSTR lpszGroup, LPVOID lpProps, int cbProps, int flOpt)
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{
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if (PifMgr_Load())
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return XGetProperties(hProps, lpszGroup, lpProps, cbProps, flOpt);
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else
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return 0;
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}
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int WINAPI PifMgr_SetProperties(int hProps, LPCSTR lpszGroup, const VOID FAR *lpProps, int cbProps, int flOpt)
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{
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if (PifMgr_Load())
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return XSetProperties(hProps, lpszGroup, lpProps, cbProps, flOpt);
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else
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return 0;
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}
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int WINAPI PifMgr_CloseProperties(int hProps, int flOpt)
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{
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int i;
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// SHELL32.DLL calls this (with NULL) on thread detach to give us a chance to free PIFMGR if we dont need it.
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if (hProps == NULL)
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{
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PifMgr_Free();
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}
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else if (cRef > 0)
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{
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i = XCloseProperties(hProps, flOpt);
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cRef--;
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}
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return i;
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}
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