|  | // Copyright 2011 The Chromium Authors | 
|  | // Use of this source code is governed by a BSD-style license that can be | 
|  | // found in the LICENSE file. | 
|  |  | 
|  | #include "base/synchronization/lock_impl.h" | 
|  |  | 
|  | #include <windows.h> | 
|  |  | 
|  | #include "base/synchronization/lock_metrics_recorder.h" | 
|  |  | 
|  | namespace base { | 
|  | namespace internal { | 
|  |  | 
|  | LockImpl::LockImpl() : native_handle_(SRWLOCK_INIT) {} | 
|  |  | 
|  | LockImpl::~LockImpl() = default; | 
|  |  | 
|  | void LockImpl::LockInternal() { | 
|  | LockMetricsRecorder::ScopedLockAcquisitionTimer timer; | 
|  | ::AcquireSRWLockExclusive(reinterpret_cast<PSRWLOCK>(&native_handle_)); | 
|  | } | 
|  |  | 
|  | }  // namespace internal | 
|  | }  // namespace base |