Add write and read/write support to FileStream (renamed from FileInputStream)...

net/disk_cache/block_files.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/disk_cache/block_files.h"
 
 #include "base/file_util.h"
 #include "base/histogram.h"
 #include "base/string_util.h"
 #include "base/time.h"
@@ skipping 178 matching lines @@
   DCHECK(index < 256 || index >= 0);
   std::wstring name(path_);
   std::wstring tmp = StringPrintf(L"%ls%d", kBlockName, index);
   file_util::AppendToPath(&name, tmp);
 
   return name;
 }
 
 bool BlockFiles::CreateBlockFile(int index, FileType file_type, bool force) {
   std::wstring name = Name(index);
-  int flags = force ? OS_FILE_CREATE_ALWAYS : OS_FILE_CREATE;
-  flags |= OS_FILE_WRITE | OS_FILE_SHARE_READ;
+  int flags =
+      force ? base::PLATFORM_FILE_CREATE_ALWAYS : base::PLATFORM_FILE_CREATE;
+  flags |= base::PLATFORM_FILE_WRITE | base::PLATFORM_FILE_EXCLUSIVE_WRITE;
 
-  scoped_refptr<File> file(new File(CreateOSFile(name.c_str(), flags, NULL)));
+  scoped_refptr<File> file(new File(
+      base::CreatePlatformFile(name.c_str(), flags, NULL)));
   if (!file->IsValid())
     return false;
 
   BlockFileHeader header;
   header.entry_size = Addr::BlockSizeForFileType(file_type);
   header.this_file = static_cast<int16>(index);
   DCHECK(index <= kint16max && index >= 0);
 
   return file->Write(&header, sizeof(header), 0);
 }
@@ skipping 201 matching lines @@
     int num_entries = (file_size - sizeof(*header)) / header->entry_size;
     header->max_entries = num_entries;
   }
 
   FixAllocationCounters(header);
   header->updating = 0;
   return true;
 }
 
 }  // namespace disk_cache