//+-------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1992 - 1993.
//
// File: srothint.cxx
//
// Contents: Implementation of classes used in implementing the ROT hint
// table in the SCM.
//
// History: 20-Jan-95 Ricksa Created
//
//--------------------------------------------------------------------------
#include <headers.cxx>
#include <access.hxx>
#include "srothint.hxx"
//+-------------------------------------------------------------------------
//
// Member: CScmRotHintTable::CScmRotHintTable
//
// Synopsis: Create SCM ROT hint table
//
// Arguments: [pwszName] - name for shared memory
// [psid] - security ID
//
// Algorithm: Create and map in shared memory for the hint table
//
// History: 20-Jan-95 Ricksa Created
//
//--------------------------------------------------------------------------
CScmRotHintTable::CScmRotHintTable(WCHAR *pwszName)
{
BOOL fCreated;
PSECURITY_DESCRIPTOR pRotSecurityDescriptor = NULL;
SID_IDENTIFIER_AUTHORITY SidAuthWorld = SECURITY_WORLD_SID_AUTHORITY;
PSID pSid;
pSid = 0;
fCreated = AllocateAndInitializeSid(
&SidAuthWorld, 1, 0, 0, 0, 0, 0, 0, 0, 0, &pSid );
Win4Assert(fCreated && "CRotHintTable::CRotHintTable No SID");
if ( ! fCreated || ! pSid )
return;
CAccessInfo AccessInfo(pSid);
pRotSecurityDescriptor = AccessInfo.IdentifyAccess (
TRUE,
FILE_MAP_READ,
FILE_MAP_ALL_ACCESS
);
_hSm = CreateSharedFileMapping(pwszName,
SCM_HASH_SIZE,
SCM_HASH_SIZE,
NULL,
pRotSecurityDescriptor,
PAGE_READWRITE,
(void **) &_pbHintArray,
&fCreated);
Win4Assert(_hSm && "CRotHintTable::CRotHintTable create SM failed");
Win4Assert(fCreated && "CRotHintTable::CRotHintTable Memory not created");
FreeSid( pSid );
if (_pbHintArray != NULL)
{
memset(_pbHintArray, 0, SCM_HASH_SIZE);
}
}
