File: scoped_set_task_priority_for_current_thread.cc

package info (click to toggle)
chromium 139.0.7258.127-1
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 6,122,068 kB
  • sloc: cpp: 35,100,771; ansic: 7,163,530; javascript: 4,103,002; python: 1,436,920; asm: 946,517; xml: 746,709; pascal: 187,653; perl: 88,691; sh: 88,436; objc: 79,953; sql: 51,488; cs: 44,583; fortran: 24,137; makefile: 22,147; tcl: 15,277; php: 13,980; yacc: 8,984; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (36 lines) | stat: -rw-r--r-- 1,109 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
 
// 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::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 base::internal