Revert 247926 "HID backend"

trunk/src/device/hid/hid_connection_mac.cc

Index: trunk/src/device/hid/hid_connection_mac.cc
===================================================================
--- trunk/src/device/hid/hid_connection_mac.cc	(revision 247933)
+++ trunk/src/device/hid/hid_connection_mac.cc	(working copy)
@@ -1,188 +0,0 @@
-// 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.
-
-#include "device/hid/hid_connection_mac.h"
-
-#include "base/bind.h"
-#include "base/callback.h"
-#include "base/mac/foundation_util.h"
-#include "base/threading/thread_restrictions.h"
-#include "base/tuple.h"
-#include "device/hid/hid_service.h"
-#include "device/hid/hid_service_mac.h"
-#include "net/base/io_buffer.h"
-
-#include <CoreFoundation/CoreFoundation.h>
-#include <IOKit/hid/IOHIDManager.h>
-
-namespace device {
-
-HidConnectionMac::HidConnectionMac(HidServiceMac* service,
-                                   HidDeviceInfo device_info,
-                                   IOHIDDeviceRef device)
-    : HidConnection(device_info),
-      service_(service),
-      device_(device),
-      disconnected_(false) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  message_loop_ = base::MessageLoopProxy::current();
-
-  CFRetain(device);
-  inbound_buffer_.reset((uint8_t*) malloc(device_info.input_report_size + 1));
-  IOHIDDeviceRegisterInputReportCallback(
-      device_.get(),
-      inbound_buffer_.get(),
-      device_info.input_report_size + 1,
-      &HidConnectionMac::InputReportCallback,
-      this);
-  IOHIDDeviceOpen(device_, kIOHIDOptionsTypeNone);
-}
-HidConnectionMac::~HidConnectionMac() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  while (read_queue_.size()) {
-    read_queue_.front().c.Run(false, 0);
-    read_queue_.pop();
-  }
-
-  IOHIDDeviceClose(device_, kIOHIDOptionsTypeNone);
-}
-
-void HidConnectionMac::InputReportCallback(void * context,
-                                           IOReturn result,
-                                           void * sender,
-                                           IOHIDReportType type,
-                                           uint32_t reportID,
-                                           uint8_t * report,
-                                           CFIndex reportLength) {
-  HidConnectionMac* connection = reinterpret_cast<HidConnectionMac*>(context);
-  size_t length = reportLength + (reportID != 0);
-  scoped_refptr<net::IOBuffer> buffer(new net::IOBuffer(length));
-  if (reportID) {
-    buffer->data()[0] = reportID;
-    memcpy(buffer->data() + 1, report, reportLength);
-  } else {
-    memcpy(buffer->data(), report, reportLength);
-  }
-  connection->message_loop_->PostTask(
-      FROM_HERE,
-      base::Bind(&HidConnectionMac::ProcessInputReport,
-                 connection,
-                 type,
-                 buffer,
-                 length));
-}
-
-void HidConnectionMac::ProcessReadQueue() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  while(read_queue_.size() && input_reports_.size()) {
-    PendingRead read = read_queue_.front();
-    read_queue_.pop();
-    PendingReport report = input_reports_.front();
-
-    if (read.b < report.second) {
-      read.c.Run(false, report.second);
-    } else {
-      memcpy(read.a->data(), report.first->data(), report.second);
-      input_reports_.pop();
-      read.c.Run(true, report.second);
-    }
-  }
-}
-
-void HidConnectionMac::ProcessInputReport(IOHIDReportType type,
-                                          scoped_refptr<net::IOBuffer> report,
-                                          CFIndex reportLength) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  input_reports_.push(std::make_pair(report, reportLength));
-  ProcessReadQueue();
-}
-
-void HidConnectionMac::WriteReport(IOHIDReportType type,
-                                   scoped_refptr<net::IOBuffer> buffer,
-                                   size_t size,
-                                   const IOCallback& callback) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (disconnected_ || !device_) {
-    callback.Run(false, 0);
-    return;
-  }
-  const unsigned char* data_to_send =
-      reinterpret_cast<const unsigned char*>(buffer->data());
-  size_t length_to_send = size;
-  if (data_to_send[0] == 0x0) {
-      /* Not using numbered Reports.
-       Don't send the report number. */
-      ++data_to_send;
-      --length_to_send;
-  }
-  IOReturn res = IOHIDDeviceSetReport(device_.get(),
-                                      type,
-                                      buffer->data()[0], /* Report ID*/
-                                      data_to_send,
-                                      length_to_send);
-  if (res != kIOReturnSuccess) {
-    callback.Run(false, 0);
-  } else {
-    callback.Run(true, size);
-  }
-}
-
-void HidConnectionMac::Read(scoped_refptr<net::IOBuffer> buffer,
-                            size_t size,
-                            const IOCallback& callback) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (disconnected_ || !device_) {
-    callback.Run(false, 0);
-    return;
-  }
-  read_queue_.push(MakeTuple(buffer, size, callback));
-  ProcessReadQueue();
-}
-
-void HidConnectionMac::Write(scoped_refptr<net::IOBuffer> buffer,
-                             size_t size,
-                             const IOCallback& callback) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  WriteReport(kIOHIDReportTypeOutput, buffer, size, callback);
-}
-
-void HidConnectionMac::SendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
-                                         size_t size,
-                                         const IOCallback& callback) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  WriteReport(kIOHIDReportTypeFeature, buffer, size, callback);
-}
-
-void HidConnectionMac::GetFeatureReport(scoped_refptr<net::IOBuffer> buffer,
-                                        size_t size,
-                                        const IOCallback& callback) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (disconnected_ || !device_ || device_info_.feature_report_size == 0) {
-    callback.Run(false, 0);
-    return;
-  }
-
-  if (device_info_.feature_report_size != 0 &&
-      device_info_.feature_report_size != size) {
-    callback.Run(false, 0);
-    return;
-  }
-
-  CFIndex len = device_info_.feature_report_size;
-  IOReturn res = IOHIDDeviceGetReport(device_,
-                                      kIOHIDReportTypeFeature,
-                                      0,
-                                      (uint8_t*) buffer->data(),
-                                      &len);
-  if (res == kIOReturnSuccess)
-    callback.Run(true, len);
-  else
-    callback.Run(false, 0);
-}
-
-}  // namespace device