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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_
#define CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_
#include <unistd.h>
#include "base/process.h"
#include "content/common/content_export.h"
namespace content {
// http://code.google.com/p/chromium/wiki/LinuxZygote
// The zygote host is the interface, in the browser process, to the zygote
// process.
class ZygoteHost {
public:
// Returns the singleton instance.
CONTENT_EXPORT static ZygoteHost* GetInstance();
// Returns the pid of the Zygote process.
virtual pid_t GetPid() const = 0;
// Returns the pid of the Sandbox Helper process.
virtual pid_t GetSandboxHelperPid() const = 0;
// Returns an int which is a bitmask of kSandboxLinux* values. Only valid
// after the first render has been forked.
virtual int GetSandboxStatus() const = 0;
// Adjust the OOM score of the given renderer's PID. The allowed
// range for the score is [0, 1000], where higher values are more
// likely to be killed by the OOM killer.
virtual void AdjustRendererOOMScore(base::ProcessHandle process_handle,
int score) = 0;
// Adjust the point at which the low memory notifier in the kernel tells
// us that we're low on memory. When there is less than |margin_mb| left,
// then the notifier will notify us. Set |margin_mb| to -1 to turn off
// low memory notification altogether.
virtual void AdjustLowMemoryMargin(int64 margin_mb) = 0;
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_
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