File: udev_loader.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 (51 lines) | stat: -rw-r--r-- 1,070 bytes parent folder | download | duplicates (9) 
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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "device/udev_linux/udev_loader.h"

#include <memory>

#include "base/check.h"
#include "base/no_destructor.h"
#include "base/synchronization/lock.h"
#include "device/udev_linux/udev1_loader.h"

namespace device {

namespace {

UdevLoader* g_udev_loader = nullptr;

// Provides a lock to synchronize initializing and accessing `g_udev_loader`
// across threads.
base::Lock& GetLock() {
  static base::NoDestructor<base::Lock> lock;
  return *lock;
}

}  // namespace

// static
UdevLoader* UdevLoader::Get() {
  base::AutoLock guard(GetLock());

  if (!g_udev_loader) {
    g_udev_loader = new Udev1Loader();
  }
  return g_udev_loader;
}

// static
void UdevLoader::SetForTesting(UdevLoader* loader, bool delete_previous) {
  base::AutoLock guard(GetLock());

  if (g_udev_loader && delete_previous)
    delete g_udev_loader;

  g_udev_loader = loader;
}

UdevLoader::~UdevLoader() = default;

}  // namespace device