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 "ipc/ipc_platform_file.h"
  12 #include "ipc/message_filter.h"
  13 #include "ppapi/c/pp_bool.h"
  14 #include "ppapi/c/pp_instance.h"
  15 #include "ppapi/c/private/pp_file_handle.h"
  16
  17 namespace base {
  18 class SingleThreadTaskRunner;
  19 }
  20
  21 namespace nacl {
  22 struct PnaclCacheInfo;
  23 }
  24
  25 // A class to keep track of requests made to the browser for resources that the
  26 // PNaCl translator needs (e.g. descriptors for the translator nexes, temp
  27 // files, and cached translations).
  28
  29 // "Resource" might not be the best name for the various things that pnacl
  30 // needs from the browser since "Resource" is a Pepper thing...
  31 class PnaclTranslationResourceHost : public IPC::MessageFilter {
  32  public:
  33   typedef base::Callback<void(int32_t, bool, PP_FileHandle)>
  34           RequestNexeFdCallback;
  35
  36   explicit PnaclTranslationResourceHost(
  37       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner);
  38   void RequestNexeFd(int render_view_id,
  39                      PP_Instance instance,
  40                      const nacl::PnaclCacheInfo& cache_info,
  41                      RequestNexeFdCallback callback);
  42   void ReportTranslationFinished(PP_Instance instance, PP_Bool success);
  43
  44  protected:
  45   ~PnaclTranslationResourceHost() override;
  46
  47  private:
  48   // Maps the instance with an outstanding cache request to the info
  49   // about that request.
  50   typedef std::map<PP_Instance, RequestNexeFdCallback> CacheRequestInfoMap;
  51
  52   // IPC::MessageFilter implementation.
  53   bool OnMessageReceived(const IPC::Message& message) override;
  54   void OnFilterAdded(IPC::Sender* sender) override;
  55   void OnFilterRemoved() override;
  56   void OnChannelClosing() override;
  57
  58   void SendRequestNexeFd(int render_view_id,
  59                          PP_Instance instance,
  60                          const nacl::PnaclCacheInfo& cache_info,
  61                          RequestNexeFdCallback callback);
  62   void SendReportTranslationFinished(PP_Instance instance,
  63                                      PP_Bool success);
  64   void OnNexeTempFileReply(PP_Instance instance,
  65                            bool is_hit,
  66                            IPC::PlatformFileForTransit file);
  67   void CleanupCacheRequests();
  68
  69   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
  70
  71   // Should be accessed on the io thread.
  72   IPC::Sender* sender_;
  73   CacheRequestInfoMap pending_cache_requests_;
  74   DISALLOW_COPY_AND_ASSIGN(PnaclTranslationResourceHost);
  75 };
  76
  77 #endif  // CHROME_RENDERER_PEPPER_PNACL_TRANSLATION_RESOURCE_HOST_H_