src/chrome/renderer/pepper/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 "ipc/ipc_channel_proxy.h"
  11 #include "ipc/ipc_platform_file.h"
  12 #include "ppapi/c/private/pp_file_handle.h"
  13 #include "ppapi/shared_impl/tracked_callback.h"
  14
  15 namespace nacl {
  16 struct PnaclCacheInfo;
  17 }
  18
  19 // A class to keep track of requests made to the browser for resources that the
  20 // PNaCl translator needs (e.g. descriptors for the translator nexes, temp
  21 // files, and cached translations).
  22
  23 // "Resource" might not be the best name for the various things that pnacl
  24 // needs from the browser since "Resource" is a Pepper thing...
  25 class PnaclTranslationResourceHost : public IPC::ChannelProxy::MessageFilter {
  26  public:
  27   explicit PnaclTranslationResourceHost(
  28       const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
  29   void RequestNexeFd(int render_view_id,
  30                      PP_Instance instance,
  31                      const nacl::PnaclCacheInfo& cache_info,
  32                      PP_Bool* is_hit,
  33                      PP_FileHandle* file_handle,
  34                      scoped_refptr<ppapi::TrackedCallback> callback);
  35   void ReportTranslationFinished(PP_Instance instance, PP_Bool success);
  36
  37  protected:
  38   virtual ~PnaclTranslationResourceHost();
  39
  40  private:
  41   class CacheRequestInfo {
  42    public:
  43     CacheRequestInfo(PP_Bool* hit,
  44                      PP_FileHandle* handle,
  45                      scoped_refptr<ppapi::TrackedCallback> cb);
  46
  47     ~CacheRequestInfo();
  48
  49     PP_Bool* is_hit;
  50     PP_FileHandle* file_handle;
  51     scoped_refptr<ppapi::TrackedCallback> callback;
  52   };
  53
  54   // Maps the instance with an outstanding cache request to the info
  55   // about that request.
  56   typedef std::map<PP_Instance, CacheRequestInfo> CacheRequestInfoMap;
  57   // IPC::ChannelProxy::MessageFilter implementation.
  58   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  59   virtual void OnFilterAdded(IPC::Channel* channel) OVERRIDE;
  60   virtual void OnFilterRemoved() OVERRIDE;
  61   virtual void OnChannelClosing() OVERRIDE;
  62
  63   void SendRequestNexeFd(int render_view_id,
  64                          PP_Instance instance,
  65                          const nacl::PnaclCacheInfo& cache_info,
  66                          PP_Bool* is_hit,
  67                          PP_FileHandle* file_handle,
  68                          scoped_refptr<ppapi::TrackedCallback> callback);
  69   void SendReportTranslationFinished(PP_Instance instance,
  70                                      PP_Bool success);
  71   void OnNexeTempFileReply(PP_Instance instance,
  72                            bool is_hit,
  73                            IPC::PlatformFileForTransit file);
  74   void CleanupCacheRequests();
  75
  76   scoped_refptr<base::MessageLoopProxy> io_message_loop_;
  77
  78   // Should be accessed on the io thread.
  79   IPC::Channel* channel_;
  80   CacheRequestInfoMap pending_cache_requests_;
  81   DISALLOW_COPY_AND_ASSIGN(PnaclTranslationResourceHost);
  82 };
  83
  84 #endif  // CHROME_RENDERER_PEPPER_PNACL_TRANSLATION_RESOURCE_HOST_H_