Sweden-Number/dlls/msdasql/session.c

115 lines
2.9 KiB
C

/*
* Copyright 2020 Alistair Leslie-Hughes
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#define COBJMACROS
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "objbase.h"
#include "rpcproxy.h"
#include "msdasc.h"
#include "wine/heap.h"
#include "wine/debug.h"
#include "msdasql.h"
#include "msdasql_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(msdasql);
struct msdasql_session
{
IUnknown session_iface;
LONG refs;
};
static inline struct msdasql_session *impl_from_IUnknown( IUnknown *iface )
{
return CONTAINING_RECORD( iface, struct msdasql_session, session_iface );
}
static HRESULT WINAPI session_QueryInterface(IUnknown *iface, REFIID riid, void **ppv)
{
struct msdasql_session *session = impl_from_IUnknown( iface );
TRACE( "%p, %s, %p\n", iface, debugstr_guid(riid), ppv );
*ppv = NULL;
if(IsEqualGUID(&IID_IUnknown, riid))
{
TRACE("(%p)->(IID_IUnknown %p)\n", iface, ppv);
*ppv = &session->session_iface;
}
if(*ppv)
{
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
FIXME("(%p)->(%s %p)\n", iface, debugstr_guid(riid), ppv);
return E_NOINTERFACE;
}
static ULONG WINAPI session_AddRef(IUnknown *iface)
{
struct msdasql_session *session = impl_from_IUnknown( iface );
LONG refs = InterlockedIncrement( &session->refs );
TRACE( "%p new refcount %d\n", session, refs );
return refs;
}
static ULONG WINAPI session_Release(IUnknown *iface)
{
struct msdasql_session *session = impl_from_IUnknown( iface );
LONG refs = InterlockedDecrement( &session->refs );
TRACE( "%p new refcount %d\n", session, refs );
if (!refs)
{
TRACE( "destroying %p\n", session );
heap_free( session );
}
return refs;
}
static const IUnknownVtbl unkfactoryVtbl =
{
session_QueryInterface,
session_AddRef,
session_Release,
};
HRESULT create_db_session(REFIID riid, void **unk)
{
struct msdasql_session *session;
HRESULT hr;
session = heap_alloc(sizeof(*session));
if (!session)
return E_OUTOFMEMORY;
session->session_iface.lpVtbl = &unkfactoryVtbl;
session->refs = 1;
hr = IUnknown_QueryInterface(&session->session_iface, riid, unk);
IUnknown_Release(&session->session_iface);
return hr;
}