mojo/shell/child_process.h

   1 // Copyright 2014 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 MOJO_SHELL_CHILD_PROCESS_H_
   6 #define MOJO_SHELL_CHILD_PROCESS_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "mojo/embedder/scoped_platform_handle.h"
  11
  12 namespace base {
  13 class CommandLine;
  14 }
  15
  16 namespace mojo {
  17 namespace shell {
  18
  19 // A base class for child processes -- i.e., code that is actually run within
  20 // the child process. (Instances are manufactured by |Create()|.)
  21 class ChildProcess {
  22  public:
  23   enum Type {
  24     TYPE_TEST,
  25     // Hosts a single app (see app_child_process(_host).*).
  26     TYPE_APP
  27   };
  28
  29   virtual ~ChildProcess();
  30
  31   // Returns null if the command line doesn't indicate that this is a child
  32   // process. |main()| should call this, and if it returns non-null it should
  33   // call |Main()| (without a message loop on the current thread).
  34   static scoped_ptr<ChildProcess> Create(const base::CommandLine& command_line);
  35
  36   // To be implemented by subclasses. This is the "entrypoint" for a child
  37   // process. Run with no message loop for the main thread.
  38   virtual void Main() = 0;
  39
  40  protected:
  41   ChildProcess();
  42
  43   embedder::ScopedPlatformHandle* platform_channel() {
  44     return &platform_channel_;
  45   }
  46
  47  private:
  48   // Available in |Main()| (after a successful |Create()|).
  49   embedder::ScopedPlatformHandle platform_channel_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(ChildProcess);
  52 };
  53
  54 }  // namespace shell
  55 }  // namespace mojo
  56
  57 #endif  // MOJO_SHELL_CHILD_PROCESS_H_