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//+-------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1992 - 1993.
//
// File: clckpath.cxx
//
// Contents: Methods for serializing binds on paths.
//
// History: 21-Dec-93 Ricksa Created
// 11-Oct-94 BillMo Simplified
//
//--------------------------------------------------------------------------
#include <headers.cxx>
#pragma hdrstop
#include "scm.hxx"
#include "clckpath.hxx"
//+-------------------------------------------------------------------------
//
// Member: CLockPath::CLockPath
//
// Synopsis: Put path in lock table
//
// Arguments: [pwszPath] - path to lock
// [hr] - result of construction (set only on failure)
//
// History: 21-Dec-93 Ricksa Created
// 26-Sep-94 BillMo Simplified by using named mutexes.
//
//--------------------------------------------------------------------------
CLockPath::CLockPath(WCHAR *pwszPath, HRESULT& hr)
{
_h = NULL;
if (pwszPath != NULL)
{
#define LOCKPREFIX TEXT("OLESCMLOCKPATH")
TCHAR tszPathUpper[MAX_PATH+1];
TCHAR *ptsz;
ULONG cSlashes = 0;
//
// adjust the input pointer to skip past drive letter or
// UNC path
//
if (pwszPath[0] == L'\\' && pwszPath[1] == L'\\')
{
while (*pwszPath && cSlashes < 3)
{
if (*pwszPath == L'\\')
cSlashes++;
pwszPath++;
}
}
else
if (pwszPath[0] != L'\0' &&
pwszPath[1] == L':' &&
pwszPath[2] == L'\\')
{
pwszPath += 3;
cSlashes = 3;
}
if (cSlashes == 3 && *pwszPath != L'\0')
{
_tcscpy(tszPathUpper, LOCKPREFIX);
//
// Copy the path onto the end of the prefix and
// as doing so convert \ to -, and check for buffer size
//
for (ptsz = tszPathUpper+sizeof(LOCKPREFIX)/sizeof(WCHAR)-1;
ptsz <= &tszPathUpper[MAX_PATH];
ptsz++, pwszPath++)
{
*ptsz = (TCHAR)*pwszPath;
if (*ptsz == L'\\')
*ptsz = L'-';
else
if (*ptsz == L'\0')
break;
}
tszPathUpper[MAX_PATH] = L'\0';
_tcsupr(tszPathUpper);
_h = CreateMutex(NULL, FALSE, tszPathUpper);
if (_h == NULL)
{
hr = HRESULT_FROM_WIN32(GetLastError());
return;
}
WaitForSingleObject(_h, INFINITE);
}
}
}
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