HRESULT FileLockBytesImpl_LockRegionSync(ILockBytes* iface,
ULARGE_INTEGER libOffset, ULARGE_INTEGER cb)
{
FileLockBytesImpl* This = impl_from_ILockBytes(iface);
OVERLAPPED ol;
if (iface->lpVtbl != &FileLockBytesImpl_Vtbl)
return E_NOTIMPL;
ol.hEvent = 0;
ol.u.s.Offset = libOffset.u.LowPart;
ol.u.s.OffsetHigh = libOffset.u.HighPart;
if (LockFileEx(This->hfile, LOCKFILE_EXCLUSIVE_LOCK, 0, cb.u.LowPart, cb.u.HighPart, &ol))
return S_OK;
return get_lock_error();
}
static HRESULT WINAPI FileLockBytesImpl_UnlockRegion(ILockBytes* iface,
ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
{
FileLockBytesImpl* This = impl_from_ILockBytes(iface);
OVERLAPPED ol;
TRACE("ofs %u count %u flags %x\n", libOffset.u.LowPart, cb.u.LowPart, dwLockType);
if (dwLockType & LOCK_WRITE)
return STG_E_INVALIDFUNCTION;
ol.hEvent = 0;
ol.u.s.Offset = libOffset.u.LowPart;
ol.u.s.OffsetHigh = libOffset.u.HighPart;
if (UnlockFileEx(This->hfile, 0, cb.u.LowPart, cb.u.HighPart, &ol))
return S_OK;
return get_lock_error();
}
static HRESULT WINAPI FileLockBytesImpl_LockRegion(ILockBytes* iface,
ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
{
FileLockBytesImpl* This = impl_from_ILockBytes(iface);
OVERLAPPED ol;
DWORD lock_flags = LOCKFILE_FAIL_IMMEDIATELY;
TRACE("ofs %u count %u flags %x\n", libOffset.u.LowPart, cb.u.LowPart, dwLockType);
if (dwLockType & LOCK_WRITE)
return STG_E_INVALIDFUNCTION;
if (dwLockType & (LOCK_EXCLUSIVE|LOCK_ONLYONCE))
lock_flags |= LOCKFILE_EXCLUSIVE_LOCK;
ol.hEvent = 0;
ol.u.s.Offset = libOffset.u.LowPart;
ol.u.s.OffsetHigh = libOffset.u.HighPart;
if (LockFileEx(This->hfile, lock_flags, 0, cb.u.LowPart, cb.u.HighPart, &ol))
return S_OK;
return get_lock_error();
}
