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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_BROWSER_UTILITY_PROCESS_HOST_IMPL_H_
      6 #define CONTENT_BROWSER_UTILITY_PROCESS_HOST_IMPL_H_
      7 
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/compiler_specific.h"
     13 #include "base/memory/ref_counted.h"
     14 #include "base/memory/scoped_ptr.h"
     15 #include "base/memory/weak_ptr.h"
     16 #include "content/public/browser/browser_child_process_host_delegate.h"
     17 #include "content/public/browser/utility_process_host.h"
     18 
     19 namespace base {
     20 class SequencedTaskRunner;
     21 }
     22 
     23 namespace content {
     24 class BrowserChildProcessHostImpl;
     25 class UtilityMainThread;
     26 
     27 class CONTENT_EXPORT UtilityProcessHostImpl
     28     : public NON_EXPORTED_BASE(UtilityProcessHost),
     29       public BrowserChildProcessHostDelegate {
     30  public:
     31   UtilityProcessHostImpl(UtilityProcessHostClient* client,
     32                          base::SequencedTaskRunner* client_task_runner);
     33   virtual ~UtilityProcessHostImpl();
     34 
     35   // UtilityProcessHost implementation:
     36   virtual bool Send(IPC::Message* message) OVERRIDE;
     37   virtual bool StartBatchMode() OVERRIDE;
     38   virtual void EndBatchMode() OVERRIDE;
     39   virtual void SetExposedDir(const base::FilePath& dir) OVERRIDE;
     40   virtual void EnableMDns() OVERRIDE;
     41   virtual void DisableSandbox() OVERRIDE;
     42   virtual void EnableZygote() OVERRIDE;
     43   virtual const ChildProcessData& GetData() OVERRIDE;
     44 #if defined(OS_POSIX)
     45   virtual void SetEnv(const base::EnvironmentVector& env) OVERRIDE;
     46 #endif
     47 
     48   void set_child_flags(int flags) { child_flags_ = flags; }
     49 
     50  private:
     51   // Starts a process if necessary.  Returns true if it succeeded or a process
     52   // has already been started via StartBatchMode().
     53   bool StartProcess();
     54 
     55   // BrowserChildProcessHost:
     56   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
     57   virtual void OnProcessCrashed(int exit_code) OVERRIDE;
     58 
     59   // A pointer to our client interface, who will be informed of progress.
     60   scoped_refptr<UtilityProcessHostClient> client_;
     61   scoped_refptr<base::SequencedTaskRunner> client_task_runner_;
     62   // True when running in batch mode, i.e., StartBatchMode() has been called
     63   // and the utility process will run until EndBatchMode().
     64   bool is_batch_mode_;
     65 
     66   base::FilePath exposed_dir_;
     67 
     68   // Whether utility process needs perform presandbox initialization for MDns.
     69   bool is_mdns_enabled_;
     70 
     71   // Whether to pass switches::kNoSandbox to the child.
     72   bool no_sandbox_;
     73 
     74   // Flags defined in ChildProcessHost with which to start the process.
     75   int child_flags_;
     76 
     77   // Launch the utility process from the zygote. Defaults to false.
     78   bool use_linux_zygote_;
     79 
     80   base::EnvironmentVector env_;
     81 
     82   bool started_;
     83 
     84   scoped_ptr<BrowserChildProcessHostImpl> process_;
     85 
     86 #if !defined(CHROME_MULTIPLE_DLL)
     87   // Used in single-process mode instead of process_.
     88   scoped_ptr<UtilityMainThread> in_process_thread_;
     89 #endif
     90 
     91   DISALLOW_COPY_AND_ASSIGN(UtilityProcessHostImpl);
     92 };
     93 
     94 }  // namespace content
     95 
     96 #endif  // CONTENT_BROWSER_UTILITY_PROCESS_HOST_IMPL_H_
     97