ppapi/thunk/ppb_file_io_trusted_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_completion_callback.h"
   6 #include "ppapi/c/pp_errors.h"
   7 #include "ppapi/c/trusted/ppb_file_io_trusted.h"
   8 #include "ppapi/shared_impl/tracked_callback.h"
   9 #include "ppapi/thunk/enter.h"
  10 #include "ppapi/thunk/thunk.h"
  11 #include "ppapi/thunk/ppb_file_io_api.h"
  12 #include "ppapi/thunk/resource_creation_api.h"
  13
  14 namespace ppapi {
  15 namespace thunk {
  16
  17 namespace {
  18
  19 typedef EnterResource<PPB_FileIO_API> EnterFileIO;
  20
  21 int32_t GetOSFileDescriptor(PP_Resource file_io) {
  22   EnterFileIO enter(file_io, true);
  23   if (enter.failed())
  24     return enter.retval();
  25   return enter.object()->GetOSFileDescriptor();
  26 }
  27
  28 int32_t WillWrite(PP_Resource file_io,
  29                   int64_t offset,
  30                   int32_t bytes_to_write,
  31                   PP_CompletionCallback callback) {
  32   EnterFileIO enter(file_io, callback, true);
  33   if (enter.failed())
  34     return enter.retval();
  35   return enter.SetResult(enter.object()->WillWrite(offset, bytes_to_write,
  36                                                    enter.callback()));
  37 }
  38
  39 int32_t WillSetLength(PP_Resource file_io,
  40                       int64_t length,
  41                       PP_CompletionCallback callback) {
  42   EnterFileIO enter(file_io, callback, true);
  43   if (enter.failed())
  44     return enter.retval();
  45   return enter.SetResult(enter.object()->WillSetLength(length,
  46                                                        enter.callback()));
  47 }
  48
  49 const PPB_FileIOTrusted g_ppb_file_io_trusted_thunk = {
  50   &GetOSFileDescriptor,
  51   &WillWrite,
  52   &WillSetLength
  53 };
  54
  55 }  // namespace
  56
  57 const PPB_FileIOTrusted_0_4* GetPPB_FileIOTrusted_0_4_Thunk() {
  58   return &g_ppb_file_io_trusted_thunk;
  59 }
  60
  61 }  // namespace thunk
  62 }  // namespace ppapi