1/* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#ifndef LocalFileSystem_h 32#define LocalFileSystem_h 33 34#if ENABLE(FILE_SYSTEM) 35 36#include "DOMFileSystemBase.h" 37#include "FileSystemType.h" 38#include <wtf/PassRefPtr.h> 39#include <wtf/RefCounted.h> 40#include <wtf/text/WTFString.h> 41 42namespace WebCore { 43 44class ErrorCallback; 45class FileSystemCallback; 46class ScriptExecutionContext; 47 48// Keeps per-process information and provides an entry point to open a file system. 49class LocalFileSystem { 50 WTF_MAKE_NONCOPYABLE(LocalFileSystem); 51public: 52 // Returns a per-process instance of LocalFileSystem. 53 // Note that LocalFileSystem::initializeLocalFileSystem must be called before 54 // calling this one. 55 static LocalFileSystem& localFileSystem(); 56 57 // Does not create the root path for file system, just reads it if available. 58 void readFileSystem(ScriptExecutionContext*, FileSystemType, PassOwnPtr<AsyncFileSystemCallbacks>, FileSystemSynchronousType = AsynchronousFileSystem); 59 60 void requestFileSystem(ScriptExecutionContext*, FileSystemType, long long size, PassOwnPtr<AsyncFileSystemCallbacks>, FileSystemSynchronousType = AsynchronousFileSystem); 61 62 void deleteFileSystem(ScriptExecutionContext*, FileSystemType, PassOwnPtr<AsyncFileSystemCallbacks>); 63 64 // This call is not thread-safe; must be called before any worker threads are created. 65 static void initializeLocalFileSystem(const String&); 66 67 String fileSystemBasePath() const; 68 69private: 70 explicit LocalFileSystem(const String& basePath) 71 : m_basePath(basePath) 72 { 73 } 74 75 static LocalFileSystem* s_instance; 76 77 // An inner class that enforces thread-safe string access. 78 class SystemBasePath { 79 public: 80 explicit SystemBasePath(const String& path) : m_value(path) { } 81 operator String() const 82 { 83 return m_value.isolatedCopy(); 84 } 85 private: 86 String m_value; 87 }; 88 89 SystemBasePath m_basePath; 90}; 91 92} // namespace 93 94#endif // ENABLE(FILE_SYSTEM) 95 96#endif // LocalFileSystem_h 97