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73 lines
2.3 KiB
73 lines
2.3 KiB
4 months ago
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// Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef LIBBRILLO_BRILLO_UDEV_UDEV_MONITOR_H_
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#define LIBBRILLO_BRILLO_UDEV_UDEV_MONITOR_H_
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#include <memory>
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#include <base/macros.h>
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#include <brillo/brillo_export.h>
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struct udev_monitor;
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namespace brillo {
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class UdevDevice;
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// A udev monitor, which wraps a udev_monitor C struct from libudev and related
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// library functions into a C++ object.
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class BRILLO_EXPORT UdevMonitor {
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public:
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static const int kInvalidFileDescriptor = -1;
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// Constructs a UdevMonitor object by taking a raw pointer to a udev_monitor
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// struct as |monitor|. The ownership of |monitor| is not transferred, but its
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// reference count is increased by one during the lifetime of this object.
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explicit UdevMonitor(udev_monitor* monitor);
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// Destructs this UdevMonitor object and decreases the reference count of the
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// underlying udev_monitor struct by one.
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virtual ~UdevMonitor();
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// Wraps udev_monitor_enable_receiving(). Returns true on success.
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virtual bool EnableReceiving();
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// Wraps udev_monitor_get_fd().
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virtual int GetFileDescriptor() const;
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// Wraps udev_monitor_receive_device().
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virtual std::unique_ptr<UdevDevice> ReceiveDevice();
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// Wraps udev_monitor_filter_add_match_subsystem_devtype(). Returns true on
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// success.
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virtual bool FilterAddMatchSubsystemDeviceType(const char* subsystem,
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const char* device_type);
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// Wraps udev_monitor_filter_add_match_tag(). Returns true on success.
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virtual bool FilterAddMatchTag(const char* tag);
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// Wraps udev_monitor_filter_update(). Returns true on success.
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virtual bool FilterUpdate();
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// Wraps udev_monitor_filter_remove(). Returns true on success.
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virtual bool FilterRemove();
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private:
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// Allows MockUdevMonitor to invoke the private default constructor below.
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friend class MockUdevMonitor;
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// Constructs a UdevMonitor object without referencing a udev_monitor struct,
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// which is only allowed to be called by MockUdevMonitor.
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UdevMonitor();
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udev_monitor* monitor_;
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DISALLOW_COPY_AND_ASSIGN(UdevMonitor);
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};
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} // namespace brillo
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#endif // LIBBRILLO_BRILLO_UDEV_UDEV_MONITOR_H_
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