components/nacl/loader/nacl_listener.h

   1 // Copyright 2013 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 CHROME_NACL_NACL_LISTENER_H_
   6 #define CHROME_NACL_NACL_LISTENER_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/synchronization/waitable_event.h"
  12 #include "base/threading/thread.h"
  13 #include "components/nacl/common/nacl_types.h"
  14 #include "ipc/ipc_listener.h"
  15
  16 namespace IPC {
  17 class SyncChannel;
  18 class SyncMessageFilter;
  19 }
  20
  21 // The NaClListener is an IPC channel listener that waits for a
  22 // request to start a NaCl module.
  23 class NaClListener : public IPC::Listener {
  24  public:
  25   NaClListener();
  26   virtual ~NaClListener();
  27   // Listen for a request to launch a NaCl module.
  28   void Listen();
  29
  30   bool Send(IPC::Message* msg);
  31
  32 #if defined(OS_LINUX)
  33   void set_prereserved_sandbox_size(size_t prereserved_sandbox_size) {
  34     prereserved_sandbox_size_ = prereserved_sandbox_size;
  35   }
  36 #endif
  37 #if defined(OS_POSIX)
  38   void set_number_of_cores(int number_of_cores) {
  39     number_of_cores_ = number_of_cores;
  40   }
  41 #endif
  42
  43  private:
  44   void OnStart(const nacl::NaClStartParams& params);
  45   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
  46
  47   // A channel back to the browser.
  48   scoped_ptr<IPC::SyncChannel> channel_;
  49
  50   // A filter that allows other threads to use the channel.
  51   scoped_refptr<IPC::SyncMessageFilter> filter_;
  52
  53   base::WaitableEvent shutdown_event_;
  54   base::Thread io_thread_;
  55
  56 #if defined(OS_LINUX)
  57   size_t prereserved_sandbox_size_;
  58 #endif
  59 #if defined(OS_POSIX)
  60   // The outer sandbox on Linux and OSX prevents
  61   // sysconf(_SC_NPROCESSORS) from working; in Windows, there are no
  62   // problems with invoking GetSystemInfo.  Therefore, only in
  63   // OS_POSIX do we need to supply the number of cores into the
  64   // NaClChromeMainArgs object.
  65   int number_of_cores_;
  66 #endif
  67
  68   // Used to identify what thread we're on.
  69   base::MessageLoop* main_loop_;
  70
  71   DISALLOW_COPY_AND_ASSIGN(NaClListener);
  72 };
  73
  74 #endif  // CHROME_NACL_NACL_LISTENER_H_