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 "AsyncFileSystem.h" 37 #include "PlatformString.h" 38 #include <wtf/PassRefPtr.h> 39 #include <wtf/RefCounted.h> 40 41 namespace WebCore { 42 43 class ErrorCallback; 44 class FileSystemCallback; 45 class ScriptExecutionContext; 46 47 // Keeps per-process information and provides an entry point to open a file system. 48 class LocalFileSystem { 49 WTF_MAKE_NONCOPYABLE(LocalFileSystem); 50 public: 51 // Returns a per-process instance of LocalFileSystem. 52 // Note that LocalFileSystem::initializeLocalFileSystem must be called before 53 // calling this one. 54 static LocalFileSystem& localFileSystem(); 55 56 // Does not create the root path for file system, just reads it if available. 57 void readFileSystem(ScriptExecutionContext*, AsyncFileSystem::Type, PassOwnPtr<AsyncFileSystemCallbacks>, bool synchronous = false); 58 59 void requestFileSystem(ScriptExecutionContext*, AsyncFileSystem::Type, long long size, PassOwnPtr<AsyncFileSystemCallbacks>, bool synchronous = false); 60 61 #if !PLATFORM(CHROMIUM) 62 // This call is not thread-safe; must be called before any worker threads are created. 63 void initializeLocalFileSystem(const String&); 64 65 String fileSystemBasePath() const; 66 #endif 67 68 private: LocalFileSystem(const String & basePath)69 LocalFileSystem(const String& basePath) 70 : m_basePath(basePath) 71 { 72 } 73 74 static LocalFileSystem* s_instance; 75 76 // An inner class that enforces thread-safe string access. 77 class SystemBasePath { 78 public: SystemBasePath(const String & path)79 explicit SystemBasePath(const String& path) : m_value(path) { } String()80 operator String() const 81 { 82 return m_value.threadsafeCopy(); 83 } 84 private: 85 String m_value; 86 }; 87 88 SystemBasePath m_basePath; 89 }; 90 91 } // namespace 92 93 #endif // ENABLE(FILE_SYSTEM) 94 95 #endif // LocalFileSystem_h 96