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--- device/hid/hid_connection_freebsd.h.orig 2017-12-03 15:37:32.155357000 -0800
+++ device/hid/hid_connection_freebsd.h 2017-12-03 15:37:32.159062000 -0800
@@ -0,0 +1,76 @@
+// Copyright (c) 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_HID_HID_CONNECTION_FREEBSD_H_
+#define DEVICE_HID_HID_CONNECTION_FREEBSD_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <queue>
+
+#include "base/files/scoped_file.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/sequence_checker.h"
+#include "device/hid/hid_connection.h"
+
+namespace base {
+class SequencedTaskRunner;
+}
+
+namespace net {
+class IOBuffer;
+}
+
+namespace device {
+
+class HidConnectionFreeBSD : public HidConnection {
+ public:
+ HidConnectionFreeBSD(
+ scoped_refptr<HidDeviceInfo> device_info,
+ base::ScopedFD fd,
+ scoped_refptr<base::SequencedTaskRunner> blocking_task_runner);
+
+ private:
+ friend class base::RefCountedThreadSafe<HidConnectionFreeBSD>;
+ class BlockingTaskHelper;
+
+ ~HidConnectionFreeBSD() override;
+
+ // HidConnection implementation.
+ void PlatformClose() override;
+ void PlatformRead(const ReadCallback& callback) override;
+ void PlatformWrite(scoped_refptr<net::IOBuffer> buffer,
+ size_t size,
+ const WriteCallback& callback) override;
+ void PlatformGetFeatureReport(uint8_t report_id,
+ const ReadCallback& callback) override;
+ void PlatformSendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
+ size_t size,
+ const WriteCallback& callback) override;
+ void ProcessInputReport(scoped_refptr<net::IOBuffer> buffer, size_t size);
+ void ProcessReadQueue();
+
+ // |helper_| lives on the sequence to which |blocking_task_runner_| posts
+ // tasks so all calls must be posted there including this object's
+ // destruction.
+ std::unique_ptr<BlockingTaskHelper> helper_;
+
+ const scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
+
+ std::queue<PendingHidReport> pending_reports_;
+ std::queue<PendingHidRead> pending_reads_;
+ const scoped_refptr<base::SequencedTaskRunner> task_runner_;
+
+ SEQUENCE_CHECKER(sequence_checker_);
+
+ base::WeakPtrFactory<HidConnectionFreeBSD> weak_factory_;
+
+ DISALLOW_COPY_AND_ASSIGN(HidConnectionFreeBSD);
+};
+
+} // namespace device
+
+#endif // DEVICE_HID_HID_CONNECTION_FREEBSD_H_
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