Reland: Add code to deal with serial device disconnection detection on Windows

device/core/device_info_query_win.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DEVICE_CORE_DEVICE_INFO_QUERY_WIN_H_
+#define DEVICE_CORE_DEVICE_INFO_QUERY_WIN_H_
+
+#include <windows.h>
+#include <setupapi.h>
+
+#include <string.h>
+
+#include <string>
+
+#include "base/macros.h"
+#include "base/strings/string_util.h"
+
+namespace device {
+
+// Wrapper around a HDEVINFO and SP_DEVINFO_DATA that automatically destroys
+// them.
+class DeviceInfoQueryWin {
+ public:
+  DeviceInfoQueryWin()
+      : device_info_list_(SetupDiCreateDeviceInfoList(nullptr, nullptr)) {
+    memset(&device_info_data_, 0, sizeof(device_info_data_));
+  }
+
+  ~DeviceInfoQueryWin() {
+    if (device_info_list_valid()) {
+      if (device_info_data_.cbSize != 0)
+        SetupDiDeleteDeviceInfo(device_info_list_, &device_info_data_);
+      SetupDiDestroyDeviceInfoList(device_info_list_);
+    }
+  }
+
+  bool AddDevice(const char* device_path) {
+    return SetupDiOpenDeviceInterfaceA(device_info_list_, device_path, 0,
+                                       nullptr) != FALSE;
+  }
+
+  bool GetDeviceInfo() {
+    DCHECK_EQ(0U, device_info_data_.cbSize);
+    device_info_data_.cbSize = sizeof(device_info_data_);
+    if (!SetupDiEnumDeviceInfo(device_info_list_, 0, &device_info_data_)) {
+      // Clear cbSize to maintain the invariant.
+      device_info_data_.cbSize = 0;
+      return false;
+    }
+    return true;
+  }
+
+  bool GetDeviceStringProperty(DWORD property, std::string* property_buffer) {
+    DWORD property_reg_data_type;
+    const size_t property_buffer_length = 512;
+    if (!SetupDiGetDeviceRegistryPropertyA(
+            device_info_list_, &device_info_data_, property,
+            &property_reg_data_type,
+            reinterpret_cast<PBYTE>(
+                base::WriteInto(property_buffer, property_buffer_length)),
+            static_cast<DWORD>(property_buffer_length), nullptr))
+      return false;
+
+    if (property_reg_data_type != REG_SZ)
+      return false;
+
+    size_t eos = property_buffer->find('\0');
+    if (eos != std::string::npos)
+      property_buffer->resize(eos);
+
+    return true;
+  }
+
+  bool device_info_list_valid() {
+    return device_info_list_ != INVALID_HANDLE_VALUE;
+  }
+
+  HDEVINFO device_info_list() { return device_info_list_; }

[grt (UTC plus 2), 2015/11/17 16:06:56]

unused; remove

[juncai, 2015/11/17 19:14:07]

Done.

+
+  PSP_DEVINFO_DATA device_info_data() { return &device_info_data_; }

[grt (UTC plus 2), 2015/11/17 16:06:56]

unused; remove

[juncai, 2015/11/17 19:14:07]

Done.

+
+ private:
+  HDEVINFO device_info_list_ = INVALID_HANDLE_VALUE;
+  // When device_info_data_.cbSize != 0, |device_info_data_| is valid.
+  SP_DEVINFO_DATA device_info_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeviceInfoQueryWin);
+};
+
+}  // namespace device
+
+#endif  // DEVICE_CORE_DEVICE_INFO_QUERY_WIN_H_