content/browser/file_descriptor_info_impl.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 "content/browser/file_descriptor_info_impl.h"
   6
   7 namespace content {
   8
   9 // static
  10 scoped_ptr<FileDescriptorInfo> FileDescriptorInfoImpl::Create() {
  11   return scoped_ptr<FileDescriptorInfo>(new FileDescriptorInfoImpl());
  12 }
  13
  14 FileDescriptorInfoImpl::FileDescriptorInfoImpl() {
  15 }
  16
  17 FileDescriptorInfoImpl::~FileDescriptorInfoImpl() {
  18 }
  19
  20 void FileDescriptorInfoImpl::Share(int id, base::PlatformFile fd) {
  21   AddToMapping(id, fd);
  22 }
  23
  24 void FileDescriptorInfoImpl::Transfer(int id, base::ScopedFD fd) {
  25   AddToMapping(id, fd.get());
  26   owned_descriptors_.push_back(new base::ScopedFD(fd.Pass()));
  27 }
  28
  29 base::PlatformFile FileDescriptorInfoImpl::GetFDAt(size_t i) const {
  30   return mapping_[i].first;
  31 }
  32
  33 int FileDescriptorInfoImpl::GetIDAt(size_t i) const {
  34   return mapping_[i].second;
  35 }
  36
  37 size_t FileDescriptorInfoImpl::GetMappingSize() const {
  38   return mapping_.size();
  39 }
  40
  41 bool FileDescriptorInfoImpl::HasID(int id) const {
  42   for (unsigned i = 0; i < mapping_.size(); ++i) {
  43     if (mapping_[i].second == id)
  44       return true;
  45   }
  46
  47   return false;
  48 }
  49
  50 void FileDescriptorInfoImpl::AddToMapping(int id, base::PlatformFile fd) {
  51   DCHECK(!HasID(id));
  52   mapping_.push_back(std::make_pair(fd, id));
  53 }
  54
  55 const base::FileHandleMappingVector& FileDescriptorInfoImpl::GetMapping()
  56     const {
  57   return mapping_;
  58 }
  59
  60 base::FileHandleMappingVector
  61 FileDescriptorInfoImpl::GetMappingWithIDAdjustment(int delta) const {
  62   base::FileHandleMappingVector result = mapping_;
  63   // Adding delta to each ID.
  64   for (unsigned i = 0; i < mapping_.size(); ++i)
  65     result[i].second += delta;
  66   return result;
  67 }
  68
  69 }  // namespace content