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

net/disk_cache/backend_impl.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/backend_impl.h"
 
 #include "base/file_util.h"
 #include "base/histogram.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
@@ skipping 532 matching lines @@
 bool BackendImpl::CreateExternalFile(Addr* address) {
   int file_number = data_->header.last_file + 1;
   Addr file_address(0);
   bool success = false;
   for (int i = 0; (i < 0x0fffffff) && !success; i++, file_number++) {
     if (!file_address.SetFileNumber(file_number)) {
       file_number = 1;
       continue;
     }
     std::wstring name = GetFileName(file_address);
-    scoped_refptr<disk_cache::File> file(
-        new disk_cache::File(CreateOSFile(name.c_str(), OS_FILE_READ |
-            OS_FILE_WRITE |OS_FILE_SHARE_READ | OS_FILE_CREATE, NULL)));
+    int flags = base::PLATFORM_FILE_READ |
+                base::PLATFORM_FILE_WRITE | 
+                base::PLATFORM_FILE_CREATE | 
+                base::PLATFORM_FILE_EXCLUSIVE_WRITE;
+    scoped_refptr<disk_cache::File> file(new disk_cache::File(
+        base::CreatePlatformFile(name.c_str(), flags, NULL)));
     if (!file->IsValid())
       continue;
 
     success = true;
   }
 
   DCHECK(success);
   if (!success)
     return false;
 
@@ skipping 175 matching lines @@
 
   return file->SetLength(GetIndexSize(header.table_len));
 }
 
 bool BackendImpl::InitBackingStore(bool* file_created) {
   file_util::CreateDirectory(path_);
 
   std::wstring index_name(path_);
   file_util::AppendToPath(&index_name, kIndexName);
 
+  int flags = base::PLATFORM_FILE_READ |
+              base::PLATFORM_FILE_WRITE | 
+              base::PLATFORM_FILE_OPEN_ALWAYS | 
+              base::PLATFORM_FILE_EXCLUSIVE_WRITE;
   scoped_refptr<disk_cache::File> file(new disk_cache::File(
-      CreateOSFile(index_name.c_str(), OS_FILE_READ | OS_FILE_WRITE |
-          OS_FILE_SHARE_READ | OS_FILE_OPEN_ALWAYS, file_created)));
+      base::CreatePlatformFile(index_name.c_str(), flags, file_created)));
 
   if (!file->IsValid())
     return false;
 
   bool ret = true;
   if (*file_created)
     ret = CreateBackingStore(file);
 
   file = NULL;
   if (!ret)
@@ skipping 353 matching lines @@
 
   return num_dirty;
 }
 
 bool BackendImpl::CheckEntry(EntryImpl* cache_entry) {
   RankingsNode* rankings = cache_entry->rankings()->Data();
   return !rankings->pointer;
 }
 
 }  // namespace disk_cache