ppapi/thunk/ppb_flash_file_fileref_thunk.cc

   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 #include "ppapi/c/pp_errors.h"
   6 #include "ppapi/c/private/ppb_flash_file.h"
   7 #include "ppapi/thunk/enter.h"
   8 #include "ppapi/thunk/ppb_file_ref_api.h"
   9 #include "ppapi/thunk/ppb_flash_file_api.h"
  10 #include "ppapi/thunk/thunk.h"
  11
  12 namespace ppapi {
  13 namespace thunk {
  14
  15 namespace {
  16
  17 // Returns 0 on failure.
  18 PP_Instance GetInstanceFromFileRef(PP_Resource file_ref) {
  19   thunk::EnterResource<thunk::PPB_FileRef_API> enter(file_ref, true);
  20   if (enter.failed())
  21     return 0;
  22   return enter.resource()->pp_instance();
  23 }
  24
  25 int32_t OpenFile(PP_Resource file_ref_id, int32_t mode, PP_FileHandle* file) {
  26   // TODO(brettw): this function should take an instance.
  27   // To work around this, use the PP_Instance from the resource.
  28   PP_Instance instance = GetInstanceFromFileRef(file_ref_id);
  29   EnterInstanceAPI<PPB_Flash_File_API> enter(instance);
  30   if (enter.failed())
  31     return PP_ERROR_BADARGUMENT;
  32   return enter.functions()->OpenFileRef(instance, file_ref_id, mode, file);
  33 }
  34
  35 int32_t QueryFile(PP_Resource file_ref_id, struct PP_FileInfo* info) {
  36   // TODO(brettw): this function should take an instance.
  37   // To work around this, use the PP_Instance from the resource.
  38   PP_Instance instance = GetInstanceFromFileRef(file_ref_id);
  39   EnterInstanceAPI<PPB_Flash_File_API> enter(instance);
  40   if (enter.failed())
  41     return PP_ERROR_BADARGUMENT;
  42   return enter.functions()->QueryFileRef(instance, file_ref_id, info);
  43 }
  44
  45 const PPB_Flash_File_FileRef g_ppb_flash_file_fileref_thunk = {
  46   &OpenFile,
  47   &QueryFile
  48 };
  49
  50 }  // namespace
  51
  52 const PPB_Flash_File_FileRef* GetPPB_Flash_File_FileRef_Thunk() {
  53   return &g_ppb_flash_file_fileref_thunk;
  54 }
  55
  56 }  // namespace thunk
  57 }  // namespace ppapi