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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project 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 "src/futex-emulation.h" | 5 #include "src/futex-emulation.h" |
6 | 6 |
7 #include <limits> | 7 #include <limits> |
8 | 8 |
9 #include "src/base/macros.h" | 9 #include "src/base/macros.h" |
10 #include "src/base/platform/time.h" | 10 #include "src/base/platform/time.h" |
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135 // 2) After interrupted has been checked here, but before mutex_ is | 135 // 2) After interrupted has been checked here, but before mutex_ is |
136 // acquired: interrupted is checked again below, with mutex_ locked. | 136 // acquired: interrupted is checked again below, with mutex_ locked. |
137 // Because the wakeup signal also acquires mutex_, we know it will not | 137 // Because the wakeup signal also acquires mutex_, we know it will not |
138 // be able to notify until mutex_ is released below, when waiting on the | 138 // be able to notify until mutex_ is released below, when waiting on the |
139 // condition variable. | 139 // condition variable. |
140 // 3) After the mutex is released in the call to WaitFor(): this | 140 // 3) After the mutex is released in the call to WaitFor(): this |
141 // notification will wake up the condition variable. node->waiting() will | 141 // notification will wake up the condition variable. node->waiting() will |
142 // be false, so we'll loop and then check interrupts. | 142 // be false, so we'll loop and then check interrupts. |
143 if (interrupted) { | 143 if (interrupted) { |
144 Object* interrupt_object = isolate->stack_guard()->HandleInterrupts(); | 144 Object* interrupt_object = isolate->stack_guard()->HandleInterrupts(); |
145 if (interrupt_object->IsException(isolate)) { | 145 if (interrupt_object->IsException()) { |
146 result = interrupt_object; | 146 result = interrupt_object; |
147 mutex_.Pointer()->Lock(); | 147 mutex_.Pointer()->Lock(); |
148 break; | 148 break; |
149 } | 149 } |
150 } | 150 } |
151 | 151 |
152 mutex_.Pointer()->Lock(); | 152 mutex_.Pointer()->Lock(); |
153 | 153 |
154 if (node->interrupted_) { | 154 if (node->interrupted_) { |
155 // An interrupt occured while the mutex_ was unlocked. Don't wait yet. | 155 // An interrupt occured while the mutex_ was unlocked. Don't wait yet. |
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268 } | 268 } |
269 | 269 |
270 node = node->next_; | 270 node = node->next_; |
271 } | 271 } |
272 | 272 |
273 return Smi::FromInt(waiters); | 273 return Smi::FromInt(waiters); |
274 } | 274 } |
275 | 275 |
276 } // namespace internal | 276 } // namespace internal |
277 } // namespace v8 | 277 } // namespace v8 |
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