ppapi/cpp/dev/buffer_dev.cc

   1 // Copyright (c) 2011 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/cpp/dev/buffer_dev.h"
   6
   7 #include "ppapi/c/dev/ppb_buffer_dev.h"
   8 #include "ppapi/cpp/instance_handle.h"
   9 #include "ppapi/cpp/module.h"
  10 #include "ppapi/cpp/module_impl.h"
  11
  12 namespace pp {
  13
  14 namespace {
  15
  16 template <> const char* interface_name<PPB_Buffer_Dev>() {
  17   return PPB_BUFFER_DEV_INTERFACE;
  18 }
  19
  20 }  // namespace
  21
  22 Buffer_Dev::Buffer_Dev() : data_(NULL), size_(0) {
  23 }
  24
  25 Buffer_Dev::Buffer_Dev(const Buffer_Dev& other)
  26     : Resource(other) {
  27   Init();
  28 }
  29
  30 Buffer_Dev::Buffer_Dev(PP_Resource resource)
  31     : Resource(resource) {
  32   Init();
  33 }
  34
  35 Buffer_Dev::Buffer_Dev(const InstanceHandle& instance, uint32_t size)
  36     : data_(NULL),
  37       size_(0) {
  38   if (!has_interface<PPB_Buffer_Dev>())
  39     return;
  40
  41   PassRefFromConstructor(get_interface<PPB_Buffer_Dev>()->Create(
  42       instance.pp_instance(), size));
  43   Init();
  44 }
  45
  46 Buffer_Dev::Buffer_Dev(PassRef, PP_Resource resource)
  47     : Resource(PassRef(), resource) {
  48   Init();
  49 }
  50
  51 Buffer_Dev::~Buffer_Dev() {
  52   get_interface<PPB_Buffer_Dev>()->Unmap(pp_resource());
  53 }
  54
  55 Buffer_Dev& Buffer_Dev::operator=(const Buffer_Dev& rhs) {
  56   Resource::operator=(rhs);
  57   Init();
  58   return *this;
  59 }
  60
  61 void Buffer_Dev::Init() {
  62   if (get_interface<PPB_Buffer_Dev>()->Describe(pp_resource(), &size_)) {
  63     data_ = get_interface<PPB_Buffer_Dev>()->Map(pp_resource());
  64     if (data_)
  65       return;
  66   }
  67   data_ = NULL;
  68   size_ = 0;
  69 }
  70
  71 }  // namespace pp