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

* Moved net/disk_cache/os_file to base/platform_file.

Review URL: http://codereview.chromium.org/8843

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@4454 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 46 insertions, 0 deletions

diff --git a/base/platform_file.h b/base/platform_file.h
new file mode 100644
index 0000000..2230b40
--- /dev/null
+++ b/base/platform_file.h
@@ -0,0 +1,46 @@
+// 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.
+
+#ifndef BASE_PLATFORM_FILE_H_
+#define BASE_PLATFORM_FILE_H_
+
+#include "build/build_config.h"
+#if defined(OS_WIN)
+#include <windows.h>
+#endif
+
+#include <string>
+
+namespace base {
+
+#if defined(OS_WIN)
+typedef HANDLE PlatformFile;
+const PlatformFile kInvalidPlatformFileValue = INVALID_HANDLE_VALUE;
+#elif defined(OS_POSIX)
+typedef int PlatformFile;
+const PlatformFile kInvalidPlatformFileValue = -1;
+#endif
+
+enum PlatformFileFlags {
+  PLATFORM_FILE_OPEN = 1,
+  PLATFORM_FILE_CREATE = 2,
+  PLATFORM_FILE_OPEN_ALWAYS = 4,    // May create a new file.
+  PLATFORM_FILE_CREATE_ALWAYS = 8,  // May overwrite an old file.
+  PLATFORM_FILE_READ = 16,
+  PLATFORM_FILE_WRITE = 32,
+  PLATFORM_FILE_EXCLUSIVE_READ = 64,  // EXCLUSIVE is opposite of Windows SHARE
+  PLATFORM_FILE_EXCLUSIVE_WRITE = 128,
+  PLATFORM_FILE_ASYNC = 256
+};
+
+// Creates or open the given file. If PLATFORM_FILE_OPEN_ALWAYS is used, and 
+// |created| is provided, |created| will be set to true if the file was created 
+// or to false in case the file was just opened.
+PlatformFile CreatePlatformFile(const std::wstring& name,
+                                int flags,
+                                bool* created);
+
+}  // namespace base
+
+#endif  // BASE_PLATFORM_FILE_H_