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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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/gamepad/gamepad_provider.h" | 5 #include "device/gamepad/gamepad_provider.h" |
6 | 6 |
7 #include <stddef.h> | 7 #include <stddef.h> |
8 #include <string.h> | 8 #include <string.h> |
9 #include <cmath> | 9 #include <cmath> |
10 #include <utility> | 10 #include <utility> |
11 #include <vector> | 11 #include <vector> |
12 | 12 |
13 #include "base/bind.h" | 13 #include "base/bind.h" |
14 #include "base/location.h" | 14 #include "base/location.h" |
15 #include "base/logging.h" | 15 #include "base/logging.h" |
16 #include "base/single_thread_task_runner.h" | 16 #include "base/single_thread_task_runner.h" |
17 #include "base/third_party/dynamic_annotations/dynamic_annotations.h" | 17 #include "base/third_party/dynamic_annotations/dynamic_annotations.h" |
18 #include "base/threading/thread.h" | 18 #include "base/threading/thread.h" |
19 #include "base/threading/thread_restrictions.h" | 19 #include "base/threading/thread_restrictions.h" |
20 #include "base/threading/thread_task_runner_handle.h" | 20 #include "base/threading/thread_task_runner_handle.h" |
21 #include "build/build_config.h" | 21 #include "build/build_config.h" |
22 #include "device/gamepad/gamepad_data_fetcher.h" | 22 #include "device/gamepad/gamepad_data_fetcher.h" |
23 #include "device/gamepad/gamepad_data_fetcher_manager.h" | 23 #include "device/gamepad/gamepad_data_fetcher_manager.h" |
24 #include "device/gamepad/gamepad_user_gesture.h" | 24 #include "device/gamepad/gamepad_user_gesture.h" |
25 #include "mojo/public/cpp/system/platform_handle.h" | 25 #include "mojo/public/cpp/system/platform_handle.h" |
26 | 26 |
27 using blink::WebGamepad; | |
28 using blink::WebGamepads; | |
29 | |
30 namespace device { | 27 namespace device { |
31 | 28 |
32 GamepadProvider::ClosureAndThread::ClosureAndThread( | 29 GamepadProvider::ClosureAndThread::ClosureAndThread( |
33 const base::Closure& c, | 30 const base::Closure& c, |
34 const scoped_refptr<base::SingleThreadTaskRunner>& m) | 31 const scoped_refptr<base::SingleThreadTaskRunner>& m) |
35 : closure(c), task_runner(m) {} | 32 : closure(c), task_runner(m) {} |
36 | 33 |
37 GamepadProvider::ClosureAndThread::ClosureAndThread( | 34 GamepadProvider::ClosureAndThread::ClosureAndThread( |
38 const ClosureAndThread& other) = default; | 35 const ClosureAndThread& other) = default; |
39 | 36 |
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95 | 92 |
96 mojo::ScopedSharedBufferHandle GamepadProvider::GetSharedBufferHandle() { | 93 mojo::ScopedSharedBufferHandle GamepadProvider::GetSharedBufferHandle() { |
97 // TODO(heke): Use mojo::SharedBuffer rather than base::SharedMemory in | 94 // TODO(heke): Use mojo::SharedBuffer rather than base::SharedMemory in |
98 // GamepadSharedBuffer. See crbug.com/670655 for details | 95 // GamepadSharedBuffer. See crbug.com/670655 for details |
99 base::SharedMemoryHandle handle = base::SharedMemory::DuplicateHandle( | 96 base::SharedMemoryHandle handle = base::SharedMemory::DuplicateHandle( |
100 gamepad_shared_buffer_->shared_memory()->handle()); | 97 gamepad_shared_buffer_->shared_memory()->handle()); |
101 return mojo::WrapSharedMemoryHandle(handle, sizeof(GamepadHardwareBuffer), | 98 return mojo::WrapSharedMemoryHandle(handle, sizeof(GamepadHardwareBuffer), |
102 true /* read_only */); | 99 true /* read_only */); |
103 } | 100 } |
104 | 101 |
105 void GamepadProvider::GetCurrentGamepadData(WebGamepads* data) { | 102 void GamepadProvider::GetCurrentGamepadData(Gamepads* data) { |
106 const WebGamepads* pads = gamepad_shared_buffer_->buffer(); | 103 const Gamepads* pads = gamepad_shared_buffer_->buffer(); |
107 base::AutoLock lock(shared_memory_lock_); | 104 base::AutoLock lock(shared_memory_lock_); |
108 *data = *pads; | 105 *data = *pads; |
109 } | 106 } |
110 | 107 |
111 void GamepadProvider::Pause() { | 108 void GamepadProvider::Pause() { |
112 { | 109 { |
113 base::AutoLock lock(is_paused_lock_); | 110 base::AutoLock lock(is_paused_lock_); |
114 is_paused_ = true; | 111 is_paused_ = true; |
115 } | 112 } |
116 base::MessageLoop* polling_loop = polling_thread_->message_loop(); | 113 base::MessageLoop* polling_loop = polling_thread_->message_loop(); |
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220 } | 217 } |
221 } | 218 } |
222 | 219 |
223 void GamepadProvider::DoPoll() { | 220 void GamepadProvider::DoPoll() { |
224 DCHECK(polling_thread_->task_runner()->BelongsToCurrentThread()); | 221 DCHECK(polling_thread_->task_runner()->BelongsToCurrentThread()); |
225 DCHECK(have_scheduled_do_poll_); | 222 DCHECK(have_scheduled_do_poll_); |
226 have_scheduled_do_poll_ = false; | 223 have_scheduled_do_poll_ = false; |
227 | 224 |
228 bool changed; | 225 bool changed; |
229 | 226 |
230 ANNOTATE_BENIGN_RACE_SIZED(gamepad_shared_buffer_->buffer(), | 227 ANNOTATE_BENIGN_RACE_SIZED(gamepad_shared_buffer_->buffer(), sizeof(Gamepads), |
231 sizeof(WebGamepads), "Racey reads are discarded"); | 228 "Racey reads are discarded"); |
232 | 229 |
233 { | 230 { |
234 base::AutoLock lock(devices_changed_lock_); | 231 base::AutoLock lock(devices_changed_lock_); |
235 changed = devices_changed_; | 232 changed = devices_changed_; |
236 devices_changed_ = false; | 233 devices_changed_ = false; |
237 } | 234 } |
238 | 235 |
239 // Loop through each registered data fetcher and poll it's gamepad data. | 236 // Loop through each registered data fetcher and poll it's gamepad data. |
240 // It's expected that GetGamepadData will mark each gamepad as active (via | 237 // It's expected that GetGamepadData will mark each gamepad as active (via |
241 // GetPadState). If a gamepad is not marked as active during the calls to | 238 // GetPadState). If a gamepad is not marked as active during the calls to |
242 // GetGamepadData then it's assumed to be disconnected. | 239 // GetGamepadData then it's assumed to be disconnected. |
243 for (const auto& it : data_fetchers_) { | 240 for (const auto& it : data_fetchers_) { |
244 it->GetGamepadData(changed); | 241 it->GetGamepadData(changed); |
245 } | 242 } |
246 | 243 |
247 blink::WebGamepads* buffer = gamepad_shared_buffer_->buffer(); | 244 Gamepads* buffer = gamepad_shared_buffer_->buffer(); |
248 | 245 |
249 // Send out disconnect events using the last polled data before we wipe it out | 246 // Send out disconnect events using the last polled data before we wipe it out |
250 // in the mapping step. | 247 // in the mapping step. |
251 if (ever_had_user_gesture_) { | 248 if (ever_had_user_gesture_) { |
252 for (unsigned i = 0; i < WebGamepads::kItemsLengthCap; ++i) { | 249 for (unsigned i = 0; i < Gamepads::kItemsLengthCap; ++i) { |
253 PadState& state = pad_states_.get()[i]; | 250 PadState& state = pad_states_.get()[i]; |
254 | 251 |
255 if (!state.active_state && state.source != GAMEPAD_SOURCE_NONE) { | 252 if (!state.active_state && state.source != GAMEPAD_SOURCE_NONE) { |
256 auto pad = buffer->items[i]; | 253 auto pad = buffer->items[i]; |
257 pad.connected = false; | 254 pad.connected = false; |
258 OnGamepadConnectionChange(false, i, pad); | 255 OnGamepadConnectionChange(false, i, pad); |
259 ClearPadState(state); | 256 ClearPadState(state); |
260 } | 257 } |
261 } | 258 } |
262 } | 259 } |
263 | 260 |
264 { | 261 { |
265 base::AutoLock lock(shared_memory_lock_); | 262 base::AutoLock lock(shared_memory_lock_); |
266 | 263 |
267 // Acquire the SeqLock. There is only ever one writer to this data. | 264 // Acquire the SeqLock. There is only ever one writer to this data. |
268 // See gamepad_shared_buffer.h. | 265 // See gamepad_shared_buffer.h. |
269 gamepad_shared_buffer_->WriteBegin(); | 266 gamepad_shared_buffer_->WriteBegin(); |
270 for (unsigned i = 0; i < WebGamepads::kItemsLengthCap; ++i) { | 267 for (unsigned i = 0; i < Gamepads::kItemsLengthCap; ++i) { |
271 PadState& state = pad_states_.get()[i]; | 268 PadState& state = pad_states_.get()[i]; |
272 // Must run through the map+sanitize here or CheckForUserGesture may fail. | 269 // Must run through the map+sanitize here or CheckForUserGesture may fail. |
273 MapAndSanitizeGamepadData(&state, &buffer->items[i], sanitize_); | 270 MapAndSanitizeGamepadData(&state, &buffer->items[i], sanitize_); |
274 } | 271 } |
275 gamepad_shared_buffer_->WriteEnd(); | 272 gamepad_shared_buffer_->WriteEnd(); |
276 } | 273 } |
277 | 274 |
278 if (ever_had_user_gesture_) { | 275 if (ever_had_user_gesture_) { |
279 for (unsigned i = 0; i < WebGamepads::kItemsLengthCap; ++i) { | 276 for (unsigned i = 0; i < Gamepads::kItemsLengthCap; ++i) { |
280 PadState& state = pad_states_.get()[i]; | 277 PadState& state = pad_states_.get()[i]; |
281 | 278 |
282 if (state.active_state) { | 279 if (state.active_state) { |
283 if (state.active_state == GAMEPAD_NEWLY_ACTIVE) | 280 if (state.active_state == GAMEPAD_NEWLY_ACTIVE) |
284 OnGamepadConnectionChange(true, i, buffer->items[i]); | 281 OnGamepadConnectionChange(true, i, buffer->items[i]); |
285 state.active_state = GAMEPAD_INACTIVE; | 282 state.active_state = GAMEPAD_INACTIVE; |
286 } | 283 } |
287 } | 284 } |
288 } | 285 } |
289 | 286 |
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305 } | 302 } |
306 | 303 |
307 base::ThreadTaskRunnerHandle::Get()->PostDelayedTask( | 304 base::ThreadTaskRunnerHandle::Get()->PostDelayedTask( |
308 FROM_HERE, base::Bind(&GamepadProvider::DoPoll, Unretained(this)), | 305 FROM_HERE, base::Bind(&GamepadProvider::DoPoll, Unretained(this)), |
309 base::TimeDelta::FromMilliseconds(kDesiredSamplingIntervalMs)); | 306 base::TimeDelta::FromMilliseconds(kDesiredSamplingIntervalMs)); |
310 have_scheduled_do_poll_ = true; | 307 have_scheduled_do_poll_ = true; |
311 } | 308 } |
312 | 309 |
313 void GamepadProvider::OnGamepadConnectionChange(bool connected, | 310 void GamepadProvider::OnGamepadConnectionChange(bool connected, |
314 int index, | 311 int index, |
315 const WebGamepad& pad) { | 312 const Gamepad& pad) { |
316 if (connection_change_client_) | 313 if (connection_change_client_) |
317 connection_change_client_->OnGamepadConnectionChange(connected, index, pad); | 314 connection_change_client_->OnGamepadConnectionChange(connected, index, pad); |
318 } | 315 } |
319 | 316 |
320 void GamepadProvider::CheckForUserGesture() { | 317 void GamepadProvider::CheckForUserGesture() { |
321 base::AutoLock lock(user_gesture_lock_); | 318 base::AutoLock lock(user_gesture_lock_); |
322 if (user_gesture_observers_.empty() && ever_had_user_gesture_) | 319 if (user_gesture_observers_.empty() && ever_had_user_gesture_) |
323 return; | 320 return; |
324 | 321 |
325 const WebGamepads* pads = gamepad_shared_buffer_->buffer(); | 322 const Gamepads* pads = gamepad_shared_buffer_->buffer(); |
326 if (GamepadsHaveUserGesture(*pads)) { | 323 if (GamepadsHaveUserGesture(*pads)) { |
327 ever_had_user_gesture_ = true; | 324 ever_had_user_gesture_ = true; |
328 for (size_t i = 0; i < user_gesture_observers_.size(); i++) { | 325 for (size_t i = 0; i < user_gesture_observers_.size(); i++) { |
329 user_gesture_observers_[i].task_runner->PostTask( | 326 user_gesture_observers_[i].task_runner->PostTask( |
330 FROM_HERE, user_gesture_observers_[i].closure); | 327 FROM_HERE, user_gesture_observers_[i].closure); |
331 } | 328 } |
332 user_gesture_observers_.clear(); | 329 user_gesture_observers_.clear(); |
333 } | 330 } |
334 } | 331 } |
335 | 332 |
336 } // namespace device | 333 } // namespace device |
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