ppapi/shared_impl/array_writer.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/shared_impl/array_writer.h"
   6
   7 #include <algorithm>
   8
   9 #include "ppapi/shared_impl/ppapi_globals.h"
  10 #include "ppapi/shared_impl/resource.h"
  11 #include "ppapi/shared_impl/resource_tracker.h"
  12 #include "ppapi/shared_impl/var.h"
  13 #include "ppapi/shared_impl/var_tracker.h"
  14
  15 namespace ppapi {
  16
  17 ArrayWriter::ArrayWriter() { Reset(); }
  18
  19 ArrayWriter::ArrayWriter(const PP_ArrayOutput& output)
  20     : pp_array_output_(output) {}
  21
  22 ArrayWriter::~ArrayWriter() {}
  23
  24 void ArrayWriter::Reset() {
  25   pp_array_output_.GetDataBuffer = NULL;
  26   pp_array_output_.user_data = NULL;
  27 }
  28
  29 bool ArrayWriter::StoreResourceVector(
  30     const std::vector<scoped_refptr<Resource> >& input) {
  31   // Always call the alloc function, even on 0 array size.
  32   void* dest =
  33       pp_array_output_.GetDataBuffer(pp_array_output_.user_data,
  34                                      static_cast<uint32_t>(input.size()),
  35                                      sizeof(PP_Resource));
  36
  37   // Regardless of success, we clear the output to prevent future calls on
  38   // this same output object.
  39   Reset();
  40
  41   if (input.empty())
  42     return true;  // Allow plugin to return NULL on 0 elements.
  43   if (!dest)
  44     return false;
  45
  46   // Convert to PP_Resources.
  47   PP_Resource* dest_resources = static_cast<PP_Resource*>(dest);
  48   for (size_t i = 0; i < input.size(); i++)
  49     dest_resources[i] = input[i]->GetReference();
  50   return true;
  51 }
  52
  53 bool ArrayWriter::StoreResourceVector(const std::vector<PP_Resource>& input) {
  54   // Always call the alloc function, even on 0 array size.
  55   void* dest =
  56       pp_array_output_.GetDataBuffer(pp_array_output_.user_data,
  57                                      static_cast<uint32_t>(input.size()),
  58                                      sizeof(PP_Resource));
  59
  60   // Regardless of success, we clear the output to prevent future calls on
  61   // this same output object.
  62   Reset();
  63
  64   if (input.empty())
  65     return true;  // Allow plugin to return NULL on 0 elements.
  66   if (!dest) {
  67     // Free the resources.
  68     for (size_t i = 0; i < input.size(); i++)
  69       PpapiGlobals::Get()->GetResourceTracker()->ReleaseResource(input[i]);
  70     return false;
  71   }
  72
  73   std::copy(input.begin(), input.end(), static_cast<PP_Resource*>(dest));
  74   return true;
  75 }
  76
  77 bool ArrayWriter::StoreVarVector(
  78     const std::vector<scoped_refptr<Var> >& input) {
  79   // Always call the alloc function, even on 0 array size.
  80   void* dest =
  81       pp_array_output_.GetDataBuffer(pp_array_output_.user_data,
  82                                      static_cast<uint32_t>(input.size()),
  83                                      sizeof(PP_Var));
  84
  85   // Regardless of success, we clear the output to prevent future calls on
  86   // this same output object.
  87   Reset();
  88
  89   if (input.empty())
  90     return true;  // Allow plugin to return NULL on 0 elements.
  91   if (!dest)
  92     return false;
  93
  94   // Convert to PP_Vars.
  95   PP_Var* dest_vars = static_cast<PP_Var*>(dest);
  96   for (size_t i = 0; i < input.size(); i++)
  97     dest_vars[i] = input[i]->GetPPVar();
  98   return true;
  99 }
 100
 101 bool ArrayWriter::StoreVarVector(const std::vector<PP_Var>& input) {
 102   // Always call the alloc function, even on 0 array size.
 103   void* dest =
 104       pp_array_output_.GetDataBuffer(pp_array_output_.user_data,
 105                                      static_cast<uint32_t>(input.size()),
 106                                      sizeof(PP_Var));
 107
 108   // Regardless of success, we clear the output to prevent future calls on
 109   // this same output object.
 110   Reset();
 111
 112   if (input.empty())
 113     return true;  // Allow plugin to return NULL on 0 elements.
 114   if (!dest) {
 115     // Free the vars.
 116     for (size_t i = 0; i < input.size(); i++)
 117       PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(input[i]);
 118     return false;
 119   }
 120
 121   std::copy(input.begin(), input.end(), static_cast<PP_Var*>(dest));
 122   return true;
 123 }
 124
 125 }  // namespace ppapi