| // 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_UTILITY_PROCESS_HOST_H_ |
| #define CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_HOST_H_ |
| |
| #include "base/environment.h" |
| #include "base/process/launch.h" |
| #include "base/threading/thread.h" |
| #include "content/common/content_export.h" |
| #include "ipc/ipc_sender.h" |
| |
| namespace base { |
| class FilePath; |
| class SequencedTaskRunner; |
| } |
| |
| namespace content { |
| class UtilityProcessHostClient; |
| struct ChildProcessData; |
| |
| // This class acts as the browser-side host to a utility child process. A |
| // utility process is a short-lived process that is created to run a specific |
| // task. This class lives solely on the IO thread. |
| // If you need a single method call in the process, use StartFooBar(p). |
| // If you need multiple batches of work to be done in the process, use |
| // StartBatchMode(), then multiple calls to StartFooBar(p), then finish with |
| // EndBatchMode(). |
| // |
| // Note: If your class keeps a ptr to an object of this type, grab a weak ptr to |
| // avoid a use after free since this object is deleted synchronously but the |
| // client notification is asynchronous. See http://crbug.com/108871. |
| class UtilityProcessHost : public IPC::Sender, |
| public base::SupportsWeakPtr<UtilityProcessHost> { |
| public: |
| // Used to create a utility process. |client| is optional. If supplied it will |
| // be notified of incoming messages from the utility process. |
| // |client_task_runner| is required if |client| is supplied and is the task |
| // runner upon which |client| will be invoked. |
| CONTENT_EXPORT static UtilityProcessHost* Create( |
| const scoped_refptr<UtilityProcessHostClient>& client, |
| const scoped_refptr<base::SequencedTaskRunner>& client_task_runner); |
| |
| ~UtilityProcessHost() override {} |
| |
| // Starts utility process in batch mode. Caller must call EndBatchMode() |
| // to finish the utility process. |
| virtual bool StartBatchMode() = 0; |
| |
| // Ends the utility process. Must be called after StartBatchMode(). |
| virtual void EndBatchMode() = 0; |
| |
| // Allows a directory to be opened through the sandbox, in case it's needed by |
| // the operation. |
| virtual void SetExposedDir(const base::FilePath& dir) = 0; |
| |
| // Perform presandbox initialization for mDNS. |
| virtual void EnableMDns() = 0; |
| |
| // Make the process run without a sandbox. |
| virtual void DisableSandbox() = 0; |
| |
| #if defined(OS_WIN) |
| // Make the process run elevated. |
| virtual void ElevatePrivileges() = 0; |
| #endif |
| |
| // Returns information about the utility child process. |
| virtual const ChildProcessData& GetData() = 0; |
| |
| #if defined(OS_POSIX) |
| virtual void SetEnv(const base::EnvironmentMap& env) = 0; |
| #endif |
| }; |
| |
| }; // namespace content |
| |
| #endif // CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_HOST_H_ |