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      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_
     75