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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "device/usb/usb_context.h" | 5 #include "device/usb/usb_context.h" |
6 | 6 |
7 #include "base/atomicops.h" | 7 #include "base/atomicops.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "base/synchronization/waitable_event.h" | 9 #include "base/synchronization/waitable_event.h" |
10 #include "base/threading/platform_thread.h" | 10 #include "base/threading/platform_thread.h" |
11 #include "device/usb/usb_error.h" | 11 #include "device/usb/usb_error.h" |
12 #include "third_party/libusb/src/libusb/interrupt.h" | 12 #include "third_party/libusb/src/libusb/interrupt.h" |
13 #include "third_party/libusb/src/libusb/libusb.h" | 13 #include "third_party/libusb/src/libusb/libusb.h" |
14 | 14 |
15 namespace device { | 15 namespace device { |
16 | 16 |
17 // The UsbEventHandler works around a design flaw in the libusb interface. There | 17 // The UsbEventHandler works around a design flaw in the libusb interface. There |
18 // is currently no way to signal to libusb that any caller into one of the event | 18 // is currently no way to signal to libusb that any caller into one of the event |
19 // handler calls should return without handling any events. | 19 // handler calls should return without handling any events. |
20 class UsbContext::UsbEventHandler : public base::PlatformThread::Delegate { | 20 class UsbContext::UsbEventHandler : public base::PlatformThread::Delegate { |
21 public: | 21 public: |
22 explicit UsbEventHandler(libusb_context* context); | 22 explicit UsbEventHandler(libusb_context* context); |
23 virtual ~UsbEventHandler(); | 23 virtual ~UsbEventHandler(); |
24 | 24 |
25 // base::PlatformThread::Delegate | 25 // base::PlatformThread::Delegate |
26 virtual void ThreadMain() OVERRIDE; | 26 virtual void ThreadMain() override; |
27 | 27 |
28 private: | 28 private: |
29 base::subtle::Atomic32 running_; | 29 base::subtle::Atomic32 running_; |
30 libusb_context* context_; | 30 libusb_context* context_; |
31 base::PlatformThreadHandle thread_handle_; | 31 base::PlatformThreadHandle thread_handle_; |
32 base::WaitableEvent start_polling_; | 32 base::WaitableEvent start_polling_; |
33 DISALLOW_COPY_AND_ASSIGN(UsbEventHandler); | 33 DISALLOW_COPY_AND_ASSIGN(UsbEventHandler); |
34 }; | 34 }; |
35 | 35 |
36 UsbContext::UsbEventHandler::UsbEventHandler(libusb_context* context) | 36 UsbContext::UsbEventHandler::UsbEventHandler(libusb_context* context) |
(...skipping 34 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
71 | 71 |
72 UsbContext::~UsbContext() { | 72 UsbContext::~UsbContext() { |
73 // destruction of UsbEventHandler is a blocking operation. | 73 // destruction of UsbEventHandler is a blocking operation. |
74 DCHECK(thread_checker_.CalledOnValidThread()); | 74 DCHECK(thread_checker_.CalledOnValidThread()); |
75 delete event_handler_; | 75 delete event_handler_; |
76 event_handler_ = NULL; | 76 event_handler_ = NULL; |
77 libusb_exit(context_); | 77 libusb_exit(context_); |
78 } | 78 } |
79 | 79 |
80 } // namespace device | 80 } // namespace device |
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