reactos/dll/win32/qmgr/enum_jobs.c

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/*
* Queue Manager (BITS) Job Enumerator
*
* Copyright 2007 Google (Roy Shea)
*
* 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
*/
#include "qmgr.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(qmgr);
typedef struct
{
IEnumBackgroundCopyJobs IEnumBackgroundCopyJobs_iface;
LONG ref;
IBackgroundCopyJob3 **jobs;
ULONG numJobs;
ULONG indexJobs;
} EnumBackgroundCopyJobsImpl;
static inline EnumBackgroundCopyJobsImpl *impl_from_IEnumBackgroundCopyJobs(IEnumBackgroundCopyJobs *iface)
{
return CONTAINING_RECORD(iface, EnumBackgroundCopyJobsImpl, IEnumBackgroundCopyJobs_iface);
}
static HRESULT WINAPI EnumBackgroundCopyJobs_QueryInterface(IEnumBackgroundCopyJobs *iface,
REFIID riid, void **ppv)
{
EnumBackgroundCopyJobsImpl *This = impl_from_IEnumBackgroundCopyJobs(iface);
TRACE("(%p)->(%s, %p)\n", This, debugstr_guid(riid), ppv);
if (IsEqualGUID(riid, &IID_IUnknown) || IsEqualGUID(riid, &IID_IEnumBackgroundCopyJobs))
{
*ppv = iface;
IEnumBackgroundCopyJobs_AddRef(iface);
return S_OK;
}
*ppv = NULL;
return E_NOINTERFACE;
}
static ULONG WINAPI EnumBackgroundCopyJobs_AddRef(IEnumBackgroundCopyJobs *iface)
{
EnumBackgroundCopyJobsImpl *This = impl_from_IEnumBackgroundCopyJobs(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p)->(%d)\n", This, ref);
return ref;
}
static ULONG WINAPI EnumBackgroundCopyJobs_Release(IEnumBackgroundCopyJobs *iface)
{
EnumBackgroundCopyJobsImpl *This = impl_from_IEnumBackgroundCopyJobs(iface);
ULONG ref = InterlockedDecrement(&This->ref);
ULONG i;
TRACE("(%p)->(%d)\n", This, ref);
if (ref == 0) {
for(i = 0; i < This->numJobs; i++)
IBackgroundCopyJob3_Release(This->jobs[i]);
HeapFree(GetProcessHeap(), 0, This->jobs);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI EnumBackgroundCopyJobs_Next(IEnumBackgroundCopyJobs *iface, ULONG celt,
IBackgroundCopyJob **rgelt, ULONG *pceltFetched)
{
EnumBackgroundCopyJobsImpl *This = impl_from_IEnumBackgroundCopyJobs(iface);
ULONG fetched;
ULONG i;
IBackgroundCopyJob3 *job;
TRACE("(%p)->(%d %p %p)\n", This, celt, rgelt, pceltFetched);
fetched = min(celt, This->numJobs - This->indexJobs);
if (pceltFetched)
*pceltFetched = fetched;
else
{
/* We need to initialize this array if the caller doesn't request
the length because length_is will default to celt. */
for (i = 0; i < celt; ++i)
rgelt[i] = NULL;
/* pceltFetched can only be NULL if celt is 1 */
if (celt != 1)
return E_INVALIDARG;
}
/* Fill in the array of objects */
for (i = 0; i < fetched; ++i)
{
job = This->jobs[This->indexJobs++];
IBackgroundCopyJob3_AddRef(job);
rgelt[i] = (IBackgroundCopyJob *)job;
}
return fetched == celt ? S_OK : S_FALSE;
}
static HRESULT WINAPI EnumBackgroundCopyJobs_Skip(IEnumBackgroundCopyJobs *iface, ULONG celt)
{
EnumBackgroundCopyJobsImpl *This = impl_from_IEnumBackgroundCopyJobs(iface);
TRACE("(%p)->(%d)\n", This, celt);
if (This->numJobs - This->indexJobs < celt)
{
This->indexJobs = This->numJobs;
return S_FALSE;
}
This->indexJobs += celt;
return S_OK;
}
static HRESULT WINAPI EnumBackgroundCopyJobs_Reset(IEnumBackgroundCopyJobs *iface)
{
EnumBackgroundCopyJobsImpl *This = impl_from_IEnumBackgroundCopyJobs(iface);
TRACE("(%p)\n", This);
This->indexJobs = 0;
return S_OK;
}
static HRESULT WINAPI EnumBackgroundCopyJobs_Clone(IEnumBackgroundCopyJobs *iface,
IEnumBackgroundCopyJobs **ppenum)
{
EnumBackgroundCopyJobsImpl *This = impl_from_IEnumBackgroundCopyJobs(iface);
FIXME("(%p)->(%p): stub\n", This, ppenum);
return E_NOTIMPL;
}
static HRESULT WINAPI EnumBackgroundCopyJobs_GetCount(IEnumBackgroundCopyJobs *iface,
ULONG *puCount)
{
EnumBackgroundCopyJobsImpl *This = impl_from_IEnumBackgroundCopyJobs(iface);
TRACE("(%p)->(%p)\n", This, puCount);
*puCount = This->numJobs;
return S_OK;
}
static const IEnumBackgroundCopyJobsVtbl EnumBackgroundCopyJobsVtbl =
{
EnumBackgroundCopyJobs_QueryInterface,
EnumBackgroundCopyJobs_AddRef,
EnumBackgroundCopyJobs_Release,
EnumBackgroundCopyJobs_Next,
EnumBackgroundCopyJobs_Skip,
EnumBackgroundCopyJobs_Reset,
EnumBackgroundCopyJobs_Clone,
EnumBackgroundCopyJobs_GetCount
};
HRESULT enum_copy_job_create(BackgroundCopyManagerImpl *qmgr, IEnumBackgroundCopyJobs **enumjob)
{
EnumBackgroundCopyJobsImpl *This;
BackgroundCopyJobImpl *job;
ULONG i;
TRACE("%p, %p)\n", qmgr, enumjob);
This = HeapAlloc(GetProcessHeap(), 0, sizeof *This);
if (!This)
return E_OUTOFMEMORY;
This->IEnumBackgroundCopyJobs_iface.lpVtbl = &EnumBackgroundCopyJobsVtbl;
This->ref = 1;
/* Create array of jobs */
This->indexJobs = 0;
EnterCriticalSection(&qmgr->cs);
This->numJobs = list_count(&qmgr->jobs);
if (0 < This->numJobs)
{
This->jobs = HeapAlloc(GetProcessHeap(), 0,
This->numJobs * sizeof *This->jobs);
if (!This->jobs)
{
LeaveCriticalSection(&qmgr->cs);
HeapFree(GetProcessHeap(), 0, This);
return E_OUTOFMEMORY;
}
}
else
This->jobs = NULL;
i = 0;
LIST_FOR_EACH_ENTRY(job, &qmgr->jobs, BackgroundCopyJobImpl, entryFromQmgr)
{
IBackgroundCopyJob3_AddRef(&job->IBackgroundCopyJob3_iface);
This->jobs[i++] = &job->IBackgroundCopyJob3_iface;
}
LeaveCriticalSection(&qmgr->cs);
*enumjob = &This->IEnumBackgroundCopyJobs_iface;
return S_OK;
}