diff options
Diffstat (limited to 'security/sandbox/chromium/base/synchronization/lock_impl_win.cc')
-rw-r--r-- | security/sandbox/chromium/base/synchronization/lock_impl_win.cc | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/security/sandbox/chromium/base/synchronization/lock_impl_win.cc b/security/sandbox/chromium/base/synchronization/lock_impl_win.cc new file mode 100644 index 000000000..fbc1bdd46 --- /dev/null +++ b/security/sandbox/chromium/base/synchronization/lock_impl_win.cc @@ -0,0 +1,36 @@ +// Copyright (c) 2011 The Chromium Authors. All rights reserved. +// 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" + +namespace base { +namespace internal { + +LockImpl::LockImpl() { + // The second parameter is the spin count, for short-held locks it avoid the + // contending thread from going to sleep which helps performance greatly. + ::InitializeCriticalSectionAndSpinCount(&native_handle_, 2000); +} + +LockImpl::~LockImpl() { + ::DeleteCriticalSection(&native_handle_); +} + +bool LockImpl::Try() { + if (::TryEnterCriticalSection(&native_handle_) != FALSE) { + return true; + } + return false; +} + +void LockImpl::Lock() { + ::EnterCriticalSection(&native_handle_); +} + +void LockImpl::Unlock() { + ::LeaveCriticalSection(&native_handle_); +} + +} // namespace internal +} // namespace base |