You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
178 lines
4.7 KiB
178 lines
4.7 KiB
//+--------------------------------------------------------------
|
|
//
|
|
// Microsoft Windows
|
|
// Copyright (C) Microsoft Corporation, 1992 - 1992.
|
|
//
|
|
// File: context.cxx
|
|
//
|
|
// Contents: CPerContext implementation
|
|
//
|
|
// History: 14-Aug-92 DrewB Created
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
#include <exphead.cxx>
|
|
#pragma hdrstop
|
|
|
|
#include <lock.hxx>
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Member: CPerContext::~CPerContext, public
|
|
//
|
|
// Synopsis: Releases internal objects
|
|
//
|
|
// History: 14-Aug-92 DrewB Created
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
#ifdef CODESEGMENTS
|
|
#pragma code_seg(SEG_CPerContext_1CPerContext)
|
|
#endif
|
|
|
|
CPerContext::~CPerContext(void)
|
|
{
|
|
#ifndef ASYNC
|
|
//In the ASYNC case, the Close() happens in the Release method.
|
|
if (_plkbBase != NULL)
|
|
Close();
|
|
#endif
|
|
if (_pgc)
|
|
{
|
|
_pgc->Remove(this);
|
|
_pgc->Release();
|
|
}
|
|
|
|
#ifdef ASYNC
|
|
if (_hNotificationEvent != INVALID_HANDLE_VALUE)
|
|
{
|
|
CloseHandle(_hNotificationEvent);
|
|
_hNotificationEvent = INVALID_HANDLE_VALUE;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CPerContext::Close, public
|
|
//
|
|
// Synopsis: Closes the ILockBytes for this context
|
|
//
|
|
// History: 09-Apr-93 DrewB Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
#ifdef CODESEGMENTS
|
|
#pragma code_seg(SEG_CPerContext_Close)
|
|
#endif
|
|
|
|
void CPerContext::Close(void)
|
|
{
|
|
if (_ulOpenLock && _pgc)
|
|
ReleaseOpen(_plkbOriginal, _pgc->GetOpenLockFlags(), _ulOpenLock);
|
|
_plkbBase->Release();
|
|
_pfstDirty->Release();
|
|
_plkbOriginal->Release();
|
|
_plkbBase = NULL;
|
|
_pfstDirty = NULL;
|
|
_plkbOriginal = NULL;
|
|
#ifdef ASYNC
|
|
if (_pfi != NULL)
|
|
{
|
|
_pfi->Release();
|
|
_pfi = NULL;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef MULTIHEAP
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Method: CSafeMultiHeap::CSafeMultiHeap
|
|
//
|
|
// Purpose: allows restoration of heap with methods calling "delete this"
|
|
//
|
|
// History: 29-Nov-95 HenryLee Created
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
CSafeMultiHeap::CSafeMultiHeap(CPerContext *ppc)
|
|
{
|
|
_pSmAllocator = &g_smAllocator;
|
|
ppc->SetAllocatorState (&_ppcPrev, _pSmAllocator);
|
|
}
|
|
|
|
//+--------------------------------------------------------------
|
|
//
|
|
// Method: CSafeMultiHeap::~CSafeMultiHeap
|
|
//
|
|
// Purpose: allows restoration of heap with methods calling "delete this"
|
|
//
|
|
// History: 29-Nov-95 HenryLee Created
|
|
//
|
|
//---------------------------------------------------------------
|
|
|
|
CSafeMultiHeap::~CSafeMultiHeap()
|
|
{
|
|
if (_ppcPrev != NULL)
|
|
_ppcPrev->SetAllocatorState(NULL, _pSmAllocator);
|
|
else
|
|
_pSmAllocator->SetState(NULL, NULL, 0, NULL, NULL);
|
|
}
|
|
#endif // MULTIHEAP
|
|
|
|
#ifdef ASYNC
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CPerContext::InitNotificationEvent, public
|
|
//
|
|
// Returns: Appropriate status code
|
|
//
|
|
// History: 17-Apr-96 PhilipLa Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
SCODE CPerContext::InitNotificationEvent(ILockBytes *plkbBase)
|
|
{
|
|
SCODE sc;
|
|
TCHAR atcEventName[CONTEXT_MUTEX_NAME_LENGTH];
|
|
|
|
olAssert(_pgc != NULL);
|
|
|
|
if (_hNotificationEvent != INVALID_HANDLE_VALUE)
|
|
{
|
|
//Already initialized, ok to exit with no error.
|
|
return S_OK;
|
|
}
|
|
|
|
if (plkbBase != NULL)
|
|
{
|
|
//We need to check to see if we're _really_ doing async or not.
|
|
IFileLockBytes *pfl;
|
|
if (SUCCEEDED(sc = plkbBase->QueryInterface(IID_IFileLockBytes,
|
|
(void **)&pfl)))
|
|
{
|
|
pfl->Release();
|
|
if (((CFileStream *)plkbBase)->GetContextPointer() == NULL)
|
|
{
|
|
//We aren't doing async, so we don't need a notification event.
|
|
return E_NOINTERFACE;
|
|
}
|
|
}
|
|
else
|
|
return sc;
|
|
|
|
_pgc->GetEventName(atcEventName);
|
|
_hNotificationEvent = CreateEventT(NULL, //No security
|
|
TRUE,
|
|
FALSE,
|
|
atcEventName);
|
|
if (_hNotificationEvent == NULL)
|
|
{
|
|
_hNotificationEvent = INVALID_HANDLE_VALUE;
|
|
return Win32ErrorToScode(GetLastError());
|
|
}
|
|
}
|
|
return S_OK;
|
|
}
|
|
#endif
|