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      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 
     13 namespace 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.
     19 class 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