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// Copyright (c) 2015 Egor Tensin <egor@tensin.name>
// This file is part of the "Windows 7 drivers" project.
// For details, see https://github.com/egor-tensin/windows7-drivers
// Distributed under the MIT License.
#include "service/all.hpp"
#include "simple/all.hpp"
#include <Windows.h>
namespace simple {
namespace {
const auto device_path = "\\\\.\\simple_device1";
const auto exchange_ints_ctl_code = CTL_CODE(0x8001, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS);
} // namespace
Device::Device() : service::Device(service::Device::open(device_path)) {}
unsigned int Device::exchange_ints(unsigned int src) const {
static_assert(
sizeof(exchange_ints_ctl_code) == sizeof(service::Device::Code),
"CTL_CODE() must produce DWORDs"
);
unsigned int dest;
send_control_code(
static_cast<service::Device::Code>(exchange_ints_ctl_code),
&src,
sizeof(src),
&dest,
sizeof(dest)
);
return dest;
}
} // namespace simple
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