ppapi/thunk/ppb_file_io_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/shared_impl/tracked_callback.h"
   8 #include "ppapi/thunk/enter.h"
   9 #include "ppapi/thunk/thunk.h"
  10 #include "ppapi/thunk/ppb_file_io_api.h"
  11 #include "ppapi/thunk/resource_creation_api.h"
  12
  13 namespace ppapi {
  14 namespace thunk {
  15
  16 namespace {
  17
  18 typedef EnterResource<PPB_FileIO_API> EnterFileIO;
  19
  20 PP_Resource Create(PP_Instance instance) {
  21   EnterResourceCreation enter(instance);
  22   if (enter.failed())
  23     return 0;
  24   return enter.functions()->CreateFileIO(instance);
  25 }
  26
  27 PP_Bool IsFileIO(PP_Resource resource) {
  28   EnterFileIO enter(resource, false);
  29   return PP_FromBool(enter.succeeded());
  30 }
  31
  32 int32_t Open(PP_Resource file_io,
  33              PP_Resource file_ref,
  34              int32_t open_flags,
  35              PP_CompletionCallback callback) {
  36   EnterFileIO enter(file_io, callback, true);
  37   if (enter.failed())
  38     return enter.retval();
  39   return enter.SetResult(enter.object()->Open(file_ref, open_flags,
  40                          enter.callback()));
  41 }
  42
  43 int32_t Query(PP_Resource file_io,
  44               PP_FileInfo* info,
  45               PP_CompletionCallback callback) {
  46   EnterFileIO enter(file_io, callback, true);
  47   if (enter.failed())
  48     return enter.retval();
  49   return enter.SetResult(enter.object()->Query(info, enter.callback()));
  50 }
  51
  52 int32_t Touch(PP_Resource file_io,
  53               PP_Time last_access_time,
  54               PP_Time last_modified_time,
  55               PP_CompletionCallback callback) {
  56   EnterFileIO enter(file_io, callback, true);
  57   if (enter.failed())
  58     return enter.retval();
  59   return enter.SetResult(enter.object()->Touch(
  60       last_access_time, last_modified_time, enter.callback()));
  61 }
  62
  63 int32_t Read(PP_Resource file_io,
  64              int64_t offset,
  65              char* buffer,
  66              int32_t bytes_to_read,
  67              PP_CompletionCallback callback) {
  68   EnterFileIO enter(file_io, callback, true);
  69   if (enter.failed())
  70     return enter.retval();
  71   return enter.SetResult(enter.object()->Read(offset, buffer, bytes_to_read,
  72                                               enter.callback()));
  73 }
  74
  75 int32_t ReadToArray(PP_Resource file_io,
  76                     int64_t offset,
  77                     int32_t max_read_length,
  78                     PP_ArrayOutput* buffer,
  79                     PP_CompletionCallback callback) {
  80   EnterFileIO enter(file_io, callback, true);
  81   if (enter.failed())
  82     return enter.retval();
  83   return enter.SetResult(enter.object()->ReadToArray(
  84       offset, max_read_length, buffer, enter.callback()));
  85 }
  86
  87 int32_t Write(PP_Resource file_io,
  88               int64_t offset,
  89               const char* buffer,
  90               int32_t bytes_to_write,
  91               PP_CompletionCallback callback) {
  92   EnterFileIO enter(file_io, callback, true);
  93   if (enter.failed())
  94     return enter.retval();
  95   return enter.SetResult(enter.object()->Write(offset, buffer, bytes_to_write,
  96                                                enter.callback()));
  97 }
  98
  99 int32_t SetLength(PP_Resource file_io,
 100                   int64_t length,
 101                   PP_CompletionCallback callback) {
 102   EnterFileIO enter(file_io, callback, true);
 103   if (enter.failed())
 104     return enter.retval();
 105   return enter.SetResult(enter.object()->SetLength(length, enter.callback()));
 106 }
 107
 108 int32_t Flush(PP_Resource file_io,
 109               PP_CompletionCallback callback) {
 110   EnterFileIO enter(file_io, callback, true);
 111   if (enter.failed())
 112     return enter.retval();
 113   return enter.SetResult(enter.object()->Flush(enter.callback()));
 114 }
 115
 116 void Close(PP_Resource file_io) {
 117   EnterFileIO enter(file_io, true);
 118   if (enter.succeeded())
 119     enter.object()->Close();
 120 }
 121
 122 const PPB_FileIO_1_1 g_ppb_file_io_thunk = {
 123   &Create,
 124   &IsFileIO,
 125   &Open,
 126   &Query,
 127   &Touch,
 128   &Read,
 129   &Write,
 130   &SetLength,
 131   &Flush,
 132   &Close,
 133   &ReadToArray
 134 };
 135
 136 const PPB_FileIO_1_0 g_ppb_file_io_thunk_1_0 = {
 137   &Create,
 138   &IsFileIO,
 139   &Open,
 140   &Query,
 141   &Touch,
 142   &Read,
 143   &Write,
 144   &SetLength,
 145   &Flush,
 146   &Close
 147 };
 148
 149 }  // namespace
 150
 151 const PPB_FileIO_1_1* GetPPB_FileIO_1_1_Thunk() {
 152   return &g_ppb_file_io_thunk;
 153 }
 154
 155 const PPB_FileIO_1_0* GetPPB_FileIO_1_0_Thunk() {
 156   return &g_ppb_file_io_thunk_1_0;
 157 }
 158
 159 }  // namespace thunk
 160 }  // namespace ppapi