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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /security/sandbox/chromium/base/synchronization/lock_impl_win.cc | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'security/sandbox/chromium/base/synchronization/lock_impl_win.cc')
-rw-r--r-- | security/sandbox/chromium/base/synchronization/lock_impl_win.cc | 40 |
1 files changed, 40 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 0000000000..e0c4e9d7fc --- /dev/null +++ b/security/sandbox/chromium/base/synchronization/lock_impl_win.cc @@ -0,0 +1,40 @@ +// 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" + +#include "base/debug/activity_tracker.h" + +#include <windows.h> + +namespace base { +namespace internal { + +LockImpl::LockImpl() : native_handle_(SRWLOCK_INIT) {} + +LockImpl::~LockImpl() = default; + +bool LockImpl::Try() { + return !!::TryAcquireSRWLockExclusive( + reinterpret_cast<PSRWLOCK>(&native_handle_)); +} + +void LockImpl::Lock() { + // The ScopedLockAcquireActivity below is relatively expensive and so its + // actions can become significant due to the very large number of locks + // that tend to be used throughout the build. To avoid this cost in the + // vast majority of the calls, simply "try" the lock first and only do the + // (tracked) blocking call if that fails. Since "try" itself is a system + // call, and thus also somewhat expensive, don't bother with it unless + // tracking is actually enabled. + if (base::debug::GlobalActivityTracker::IsEnabled()) + if (Try()) + return; + + base::debug::ScopedLockAcquireActivity lock_activity(this); + ::AcquireSRWLockExclusive(reinterpret_cast<PSRWLOCK>(&native_handle_)); +} + +} // namespace internal +} // namespace base |