1 files changed, 37 insertions, 0 deletions
diff --git a/um/libsimple/src/device.cpp b/um/libsimple/src/device.cpp
new file mode 100644
index 0000000..57e6963
--- /dev/null
+++ b/um/libsimple/src/device.cpp
@@ -0,0 +1,37 @@
+// Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+// 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 "libsimple/all.hpp"
+
+#include "libservice/all.hpp"
+
+#include <Windows.h>
+
+namespace libsimple
+{
+    namespace
+    {
+        const char* const device_path = "\\\\.\\simple_device1";
+        const auto exchange_ints_ctl_code = CTL_CODE(0x8001, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS);
+    }
+
+    Device::Device()
+        : libservice::Device(libservice::Device::open(device_path))
+    { }
+
+    unsigned int Device::exchange_ints(unsigned int src) const
+    {
+        unsigned int dest;
+
+        send_control_code(
+            exchange_ints_ctl_code,
+            &src,
+            sizeof(src),
+            &dest,
+            sizeof(dest));
+
+        return dest;
+    }
+}