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 the pid of the Sandbox Helper process. 30 virtual pid_t GetSandboxHelperPid() const = 0; 31 32 // Returns an int which is a bitmask of kSandboxLinux* values. Only valid 33 // after the first render has been forked. 34 virtual int GetSandboxStatus() const = 0; 35 36 // Adjust the OOM score of the given renderer's PID. The allowed 37 // range for the score is [0, 1000], where higher values are more 38 // likely to be killed by the OOM killer. 39 virtual void AdjustRendererOOMScore(base::ProcessHandle process_handle, 40 int score) = 0; 41 42 // Adjust the point at which the low memory notifier in the kernel tells 43 // us that we're low on memory. When there is less than |margin_mb| left, 44 // then the notifier will notify us. Set |margin_mb| to -1 to turn off 45 // low memory notification altogether. 46 virtual void AdjustLowMemoryMargin(int64 margin_mb) = 0; 47 }; 48 49 } // namespace content 50 51 #endif // CONTENT_PUBLIC_BROWSER_ZYGOTE_HOST_LINUX_H_ 52
