zygote_host_linux.h revision cedac228d2dd51db4b79ea1e72c7f249408ee061 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_
6#define CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_
7
8#include <unistd.h>
9
10#include "base/process/process.h"
11#include "content/common/content_export.h"
12
13namespace content {
14
15// http://code.google.com/p/chromium/wiki/LinuxZygote
16
17// The zygote host is the interface, in the browser process, to the zygote
18// process.
19class ZygoteHost {
20 public:
21  // Returns the singleton instance.
22  CONTENT_EXPORT static ZygoteHost* GetInstance();
23
24  virtual ~ZygoteHost() {}
25
26  // Returns the pid of the Zygote process.
27  virtual pid_t GetPid() const = 0;
28
29  // Returns an int which is a bitmask of kSandboxLinux* values. Only valid
30  // after the first render has been forked.
31  virtual int GetSandboxStatus() const = 0;
32
33  // Adjust the OOM score of the given renderer's PID.  The allowed
34  // range for the score is [0, 1000], where higher values are more
35  // likely to be killed by the OOM killer.
36  virtual void AdjustRendererOOMScore(base::ProcessHandle process_handle,
37                                      int score) = 0;
38};
39
40}  // namespace content
41
42#endif  // CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_
43