Linux: Dynamically load libudev.

device/udev_linux/udev0_loader.h

+// Copyright 2014 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_UDEV_LINUX_UDEV0_LOADER_H_
+#define DEVICE_UDEV_LINUX_UDEV0_LOADER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "device/udev_linux/udev_loader.h"
+
+class LibUdev0Loader;
+
+namespace device {
+
+class Udev0Loader : public UdevLoader {
+ public:
+  Udev0Loader();
+  ~Udev0Loader() override;
+
+ private:
+  bool Init() override;
+  const char* udev_device_get_action(udev_device* udev_device) override;
+  const char* udev_device_get_devnode(udev_device* udev_device) override;
+  udev_device* udev_device_get_parent(udev_device* udev_device) override;
+  udev_device* udev_device_get_parent_with_subsystem_devtype(
+      udev_device* udev_device,
+      const char* subsystem,
+      const char* devtype) override;
+  const char* udev_device_get_property_value(udev_device* udev_device,
+                                             const char* key) override;
+  const char* udev_device_get_subsystem(udev_device* udev_device) override;
+  const char* udev_device_get_sysattr_value(udev_device* udev_device,
+                                            const char* sysattr) override;
+  const char* udev_device_get_sysname(udev_device* udev_device) override;
+  const char* udev_device_get_syspath(udev_device* udev_device) override;
+  udev_device* udev_device_new_from_devnum(udev* udev,
+                                           char type,
+                                           dev_t devnum) override;
+  udev_device* udev_device_new_from_syspath(udev* udev,
+                                            const char* syspath) override;
+  void udev_device_unref(udev_device* udev_device) override;
+  int udev_enumerate_add_match_subsystem(udev_enumerate* udev_enumerate,
+                                         const char* subsystem) override;
+  udev_list_entry* udev_enumerate_get_list_entry(
+      udev_enumerate* udev_enumerate) override;
+  udev_enumerate* udev_enumerate_new(udev* udev) override;
+  int udev_enumerate_scan_devices(udev_enumerate* udev_enumerate) override;
+  void udev_enumerate_unref(udev_enumerate* udev_enumerate) override;
+  udev_list_entry* udev_list_entry_get_next(
+      udev_list_entry* list_entry) override;
+  const char* udev_list_entry_get_name(udev_list_entry* list_entry) override;
+  int udev_monitor_enable_receiving(udev_monitor* udev_monitor) override;
+  int udev_monitor_filter_add_match_subsystem_devtype(
+      udev_monitor* udev_monitor,
+      const char* subsystem,
+      const char* devtype) override;
+  int udev_monitor_get_fd(udev_monitor* udev_monitor) override;
+  udev_monitor* udev_monitor_new_from_netlink(udev* udev,
+                                              const char* name) override;
+  udev_device* udev_monitor_receive_device(udev_monitor* udev_monitor) override;
+  void udev_monitor_unref(udev_monitor* udev_monitor) override;
+  udev* udev_new() override;
+  void udev_set_log_fn(
+      struct udev* udev,
+      void (*log_fn)(struct udev* udev, int priority,
+                     const char* file, int line,
+                     const char* fn, const char* format,
+                     va_list args)) override;
+  void udev_set_log_priority(struct udev* udev, int priority) override;
+  void udev_unref(udev* udev) override;
+
+  scoped_ptr<LibUdev0Loader> lib_loader_;
+
+  DISALLOW_COPY_AND_ASSIGN(Udev0Loader);
+};
+
+}  // namespace device
+
+#endif  // DEVICE_UDEV_LINUX_UDEV0_LOADER_H_