net/disk_cache/blockfile/mapped_file.cc

   1 // Copyright 2013 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 "net/disk_cache/blockfile/mapped_file.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/memory/scoped_ptr.h"
  10
  11 namespace disk_cache {
  12
  13 // Note: Most of this class is implemented in platform-specific files.
  14
  15 bool MappedFile::Load(const FileBlock* block) {
  16   size_t offset = block->offset() + view_size_;
  17   return Read(block->buffer(), block->size(), offset);
  18 }
  19
  20 bool MappedFile::Store(const FileBlock* block) {
  21   size_t offset = block->offset() + view_size_;
  22   return Write(block->buffer(), block->size(), offset);
  23 }
  24
  25 bool MappedFile::Load(const FileBlock* block,
  26                       FileIOCallback* callback,
  27                       bool* completed) {
  28   size_t offset = block->offset() + view_size_;
  29   return Read(block->buffer(), block->size(), offset, callback, completed);
  30 }
  31
  32 bool MappedFile::Store(const FileBlock* block,
  33                        FileIOCallback* callback,
  34                        bool* completed) {
  35   size_t offset = block->offset() + view_size_;
  36   return Write(block->buffer(), block->size(), offset, callback, completed);
  37 }
  38
  39 bool MappedFile::Preload() {
  40   size_t file_len = GetLength();
  41   scoped_ptr<char[]> buf(new char[file_len]);
  42   if (!Read(buf.get(), file_len, 0))
  43     return false;
  44   return true;
  45 }
  46 }  // namespace disk_cache