components/nacl/renderer/plugin/pnacl_resources.h

   1 // Copyright (c) 2012 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 COMPONENTS_NACL_RENDERER_PLUGIN_PNACL_RESOURCES_H_
   6 #define COMPONENTS_NACL_RENDERER_PLUGIN_PNACL_RESOURCES_H_
   7
   8 #include "components/nacl/renderer/ppb_nacl_private.h"
   9 #include "native_client/src/include/nacl_macros.h"
  10 #include "native_client/src/trusted/desc/nacl_desc_wrapper.h"
  11 #include "ppapi/cpp/completion_callback.h"
  12
  13 namespace plugin {
  14
  15 class Plugin;
  16
  17 // PNaCl tool files / resources, which are opened by the browser.
  18 struct PnaclResourceEntry {
  19   // The name of the tool that corresponds to the opened file.
  20   std::string tool_name;
  21
  22   // File info for the executables, after they've been opened.
  23   // Only valid after StartLoad() has been called, and until
  24   // TakeFileInfo(ResourceType) is called.
  25   PP_NaClFileInfo file_info;
  26 };
  27
  28 // Loads a list of resources, providing a way to get file descriptors for
  29 // these resources.  URLs for resources are resolved by the manifest
  30 // and point to PNaCl component filesystem resources.
  31 class PnaclResources {
  32  public:
  33   PnaclResources(Plugin* plugin, bool use_subzero);
  34   virtual ~PnaclResources();
  35
  36   // Read the resource info JSON file.  This is the first step after
  37   // construction; it has to be completed before StartLoad is called.
  38   bool ReadResourceInfo();
  39
  40   // Start loading the resources.
  41   bool StartLoad();
  42
  43   enum ResourceType { LLC, LD, SUBZERO, NUM_TYPES };
  44
  45   const std::string& GetUrl(ResourceType type) const;
  46
  47   PP_NaClFileInfo TakeFileInfo(ResourceType type);
  48
  49  private:
  50   NACL_DISALLOW_COPY_AND_ASSIGN(PnaclResources);
  51
  52   // The plugin requesting the resource loading.
  53   Plugin* plugin_;
  54   bool use_subzero_;
  55
  56   PnaclResourceEntry resources_[NUM_TYPES + 1];
  57 };
  58
  59 }  // namespace plugin
  60 #endif  // COMPONENTS_NACL_RENDERER_PLUGIN_PNACL_RESOURCES_H_