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base / task / scoped_set_task_priority_for_current_thread.cc [blame]
// Copyright 2016 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/task/scoped_set_task_priority_for_current_thread.h"
#include "base/compiler_specific.h"
namespace base {
namespace internal {
namespace {
constinit thread_local TaskPriority task_priority_for_current_thread =
TaskPriority::USER_BLOCKING;
} // namespace
ScopedSetTaskPriorityForCurrentThread::ScopedSetTaskPriorityForCurrentThread(
TaskPriority priority)
: resetter_(&task_priority_for_current_thread,
priority,
TaskPriority::USER_BLOCKING) {}
ScopedSetTaskPriorityForCurrentThread::
~ScopedSetTaskPriorityForCurrentThread() = default;
TaskPriority GetTaskPriorityForCurrentThread() {
// Workaround false-positive MSAN use-of-uninitialized-value on
// thread_local storage for loaded libraries:
// https://github.com/google/sanitizers/issues/1265
MSAN_UNPOISON(&task_priority_for_current_thread, sizeof(TaskPriority));
return task_priority_for_current_thread;
}
} // namespace internal
} // namespace base