components/nacl/renderer/pnacl_translation_resource_host.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_RENDERER_PEPPER_PNACL_TRANSLATION_RESOURCE_HOST_H_
   6 #define CHROME_RENDERER_PEPPER_PNACL_TRANSLATION_RESOURCE_HOST_H_
   7
   8 #include <map>
   9
  10 #include "base/callback.h"
  11 #include "base/message_loop/message_loop_proxy.h"
  12 #include "ipc/ipc_platform_file.h"
  13 #include "ipc/message_filter.h"
  14 #include "ppapi/c/pp_bool.h"
  15 #include "ppapi/c/pp_instance.h"
  16 #include "ppapi/c/private/pp_file_handle.h"
  17
  18 namespace nacl {
  19 struct PnaclCacheInfo;
  20 }
  21
  22 // A class to keep track of requests made to the browser for resources that the
  23 // PNaCl translator needs (e.g. descriptors for the translator nexes, temp
  24 // files, and cached translations).
  25
  26 // "Resource" might not be the best name for the various things that pnacl
  27 // needs from the browser since "Resource" is a Pepper thing...
  28 class PnaclTranslationResourceHost : public IPC::MessageFilter {
  29  public:
  30   typedef base::Callback<void(int32_t, bool, PP_FileHandle)>
  31           RequestNexeFdCallback;
  32
  33   explicit PnaclTranslationResourceHost(
  34       const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
  35   void RequestNexeFd(int render_view_id,
  36                      PP_Instance instance,
  37                      const nacl::PnaclCacheInfo& cache_info,
  38                      RequestNexeFdCallback callback);
  39   void ReportTranslationFinished(PP_Instance instance, PP_Bool success);
  40
  41  protected:
  42   ~PnaclTranslationResourceHost() override;
  43
  44  private:
  45   // Maps the instance with an outstanding cache request to the info
  46   // about that request.
  47   typedef std::map<PP_Instance, RequestNexeFdCallback> CacheRequestInfoMap;
  48
  49   // IPC::MessageFilter implementation.
  50   bool OnMessageReceived(const IPC::Message& message) override;
  51   void OnFilterAdded(IPC::Sender* sender) override;
  52   void OnFilterRemoved() override;
  53   void OnChannelClosing() override;
  54
  55   void SendRequestNexeFd(int render_view_id,
  56                          PP_Instance instance,
  57                          const nacl::PnaclCacheInfo& cache_info,
  58                          RequestNexeFdCallback callback);
  59   void SendReportTranslationFinished(PP_Instance instance,
  60                                      PP_Bool success);
  61   void OnNexeTempFileReply(PP_Instance instance,
  62                            bool is_hit,
  63                            IPC::PlatformFileForTransit file);
  64   void CleanupCacheRequests();
  65
  66   scoped_refptr<base::MessageLoopProxy> io_message_loop_;
  67
  68   // Should be accessed on the io thread.
  69   IPC::Sender* sender_;
  70   CacheRequestInfoMap pending_cache_requests_;
  71   DISALLOW_COPY_AND_ASSIGN(PnaclTranslationResourceHost);
  72 };
  73
  74 #endif  // CHROME_RENDERER_PEPPER_PNACL_TRANSLATION_RESOURCE_HOST_H_