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/* Copyright (c) 2011 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.
*/
/**
* This file defines the API to create a file system associated with a file.
*/
label Chrome {
M14 = 1.0
};
/**
* The <code>PPB_FileSystem</code> struct identifies the file system type
* associated with a file.
*/
interface PPB_FileSystem {
/** Create() creates a file system object of the given type.
*
* @param[in] instance A <code>PP_Instance</code> identifying the instance
* with the file.
* @param[in] type A file system type as defined by
* <code>PP_FileSystemType</code> enum.
*
* @return A <code>PP_Resource</code> corresponding to a file system if
* successful.
*/
PP_Resource Create([in] PP_Instance instance, [in] PP_FileSystemType type);
/**
* IsFileSystem() determines if the provided resource is a file system.
*
* @param[in] resource A <code>PP_Resource</code> corresponding to a file
* system.
*
* @return <code>PP_TRUE</code> if the resource is a
* <code>PPB_FileSystem</code>, <code>PP_FALSE</code> if the resource is
* invalid or some type other than <code>PPB_FileSystem</code>.
*/
PP_Bool IsFileSystem([in] PP_Resource resource);
/**
* Open() opens the file system. A file system must be opened before running
* any other operation on it.
*
* @param[in] file_system A <code>PP_Resource</code> corresponding to a file
* system.
* @param[in] expected_size The expected size of the file system.
* @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
* completion of Open().
*
* @return An int32_t containing an error code from <code>pp_errors.h</code>.
*
* TODO(brettw) clarify whether this must have completed before a file can
* be opened in it. Clarify what it means to be "completed."
*/
int32_t Open([in] PP_Resource file_system,
[in] int64_t expected_size,
[in] PP_CompletionCallback callback);
/**
* GetType() returns the type of the provided file system.
*
* @param[in] file_system A <code>PP_Resource</code> corresponding to a file
* system.
*
* @return A <code>PP_FileSystemType</code> with the file system type if
* valid or <code>PP_FILESYSTEMTYPE_INVALID</code> if the provided resource
* is not a valid file system. It is valid to call this function even before
* Open() completes.
*/
PP_FileSystemType GetType([in] PP_Resource file_system);
};
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