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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 "base/synchronization/lock_impl.h" | 5 #include "base/synchronization/lock_impl.h" |
| 6 | 6 |
| 7 namespace base { | 7 namespace base { |
| 8 namespace internal { | 8 namespace internal { |
| 9 | 9 |
| 10 LockImpl::LockImpl() { | 10 LockImpl::LockImpl() { |
| 11 // The second parameter is the spin count, for short-held locks it avoid the | 11 // The second parameter is the spin count, for short-held locks it avoid the |
| 12 // contending thread from going to sleep which helps performance greatly. | 12 // contending thread from going to sleep which helps performance greatly. |
| 13 ::InitializeCriticalSectionAndSpinCount(&os_lock_, 2000); | 13 ::InitializeCriticalSectionAndSpinCount(&native_handle_, 2000); |
| 14 } | 14 } |
| 15 | 15 |
| 16 LockImpl::~LockImpl() { | 16 LockImpl::~LockImpl() { |
| 17 ::DeleteCriticalSection(&os_lock_); | 17 ::DeleteCriticalSection(&native_handle_); |
| 18 } | 18 } |
| 19 | 19 |
| 20 bool LockImpl::Try() { | 20 bool LockImpl::Try() { |
| 21 if (::TryEnterCriticalSection(&os_lock_) != FALSE) { | 21 if (::TryEnterCriticalSection(&native_handle_) != FALSE) { |
| 22 return true; | 22 return true; |
| 23 } | 23 } |
| 24 return false; | 24 return false; |
| 25 } | 25 } |
| 26 | 26 |
| 27 void LockImpl::Lock() { | 27 void LockImpl::Lock() { |
| 28 ::EnterCriticalSection(&os_lock_); | 28 ::EnterCriticalSection(&native_handle_); |
| 29 } | 29 } |
| 30 | 30 |
| 31 void LockImpl::Unlock() { | 31 void LockImpl::Unlock() { |
| 32 ::LeaveCriticalSection(&os_lock_); | 32 ::LeaveCriticalSection(&native_handle_); |
| 33 } | 33 } |
| 34 | 34 |
| 35 } // namespace internal | 35 } // namespace internal |
| 36 } // namespace base | 36 } // namespace base |
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