Clean up IOService implementation to be shared between patched and non-patched code.

sdk/lib/io/file_impl.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 // Read the file in blocks of size 64k.
 const int _BLOCK_SIZE = 64 * 1024;
 
 
@@ skipping 194 matching lines @@
 
   // Constructor for file.
   _File(String this.path) {
     if (path is! String) {
       throw new ArgumentError('${Error.safeToString(path)} '
                               'is not a String');
     }
   }
 
   Future<bool> exists() {
-    return IOService.dispatch(FILE_EXISTS, [path]).then((response) {
+    return _IOService.dispatch(_FILE_EXISTS, [path]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "Cannot check existence", path);
       }
       return response;
     });
   }
 
   external static _exists(String path);
 
   bool existsSync() {
     var result = _exists(path);
     throwIfError(result, "Cannot check existence of file", path);
     return result;
   }
 
   File get absolute => new File(_absolutePath);
 
   Future<FileStat> stat() => FileStat.stat(path);
 
   FileStat statSync() => FileStat.statSync(path);
 
   Future<File> create() {
-    return IOService.dispatch(FILE_CREATE, [path]).then((response) {
+    return _IOService.dispatch(_FILE_CREATE, [path]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "Cannot create file", path);
       }
       return this;
     });
   }
 
   external static _create(String path);
 
   external static _createLink(String path, String target);
 
   external static _linkTarget(String path);
 
   void createSync() {
     var result = _create(path);
     throwIfError(result, "Cannot create file", path);
   }
 
   Future<File> _delete({bool recursive: false}) {
     if (recursive) {
       return new Directory(path).delete(recursive: true).then((_) => this);
     }
-    return IOService.dispatch(FILE_DELETE, [path]).then((response) {
+    return _IOService.dispatch(_FILE_DELETE, [path]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "Cannot delete file", path);
       }
       return this;
     });
   }
 
   external static _deleteNative(String path);
 
   external static _deleteLinkNative(String path);
 
   void _deleteSync({bool recursive: false}) {
     if (recursive) {
       return new Directory(path).deleteSync(recursive: true);
     }
     var result = _deleteNative(path);
     throwIfError(result, "Cannot delete file", path);
   }
 
   Future<File> rename(String newPath) {
-    return IOService.dispatch(FILE_RENAME, [path, newPath]).then((response) {
+    return _IOService.dispatch(_FILE_RENAME, [path, newPath]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(
             response, "Cannot rename file to '$newPath'", path);
       }
       return new File(newPath);
     });
   }
 
   external static _rename(String oldPath, String newPath);
 
   external static _renameLink(String oldPath, String newPath);
 
   File renameSync(String newPath) {
     var result = _rename(path, newPath);
     throwIfError(result, "Cannot rename file to '$newPath'", path);
     return new File(newPath);
   }
 
   Directory get directory {
     _Path path = new _Path(this.path).directoryPath;
     return new Directory(path.toNativePath());
   }
 
   Future<RandomAccessFile> open({FileMode mode: FileMode.READ}) {
     if (mode != FileMode.READ &&
         mode != FileMode.WRITE &&
         mode != FileMode.APPEND) {
       return new Future.error(new ArgumentError());
     }
-    return IOService.dispatch(FILE_OPEN, [path, mode._mode]).then((response) {
+    return _IOService.dispatch(_FILE_OPEN, [path, mode._mode]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "Cannot open file", path);
       }
       return new _RandomAccessFile(response, path);
     });
   }
 
   Future<int> length() {
-    return IOService.dispatch(FILE_LENGTH_FROM_PATH, [path]).then((response) {
+    return _IOService.dispatch(_FILE_LENGTH_FROM_PATH, [path]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response,
                                      "Cannot retrieve length of file",
                                      path);
       }
       return response;
     });
   }
 
 
   external static _lengthFromPath(String path);
 
   int lengthSync() {
     var result = _lengthFromPath(path);
     throwIfError(result, "Cannot retrieve length of file", path);
     return result;
   }
 
   Future<DateTime> lastModified() {
-    return IOService.dispatch(FILE_LAST_MODIFIED, [path]).then((response) {
+    return _IOService.dispatch(_FILE_LAST_MODIFIED, [path]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response,
                                      "Cannot retrieve modification time",
                                      path);
       }
       return new DateTime.fromMillisecondsSinceEpoch(response);
     });
   }
 
   external static _lastModified(String path);
@@ skipping 172 matching lines @@
   SendPort _fileService;
 
   _RandomAccessFile(int this._id, String this.path);
 
   Future<RandomAccessFile> close() {
     if (closed) return _closedException();
     // Set the id_ to 0 (NULL) to ensure the no more async requests
     // can be issued for this file.
     int id = _id;
     _id = 0;
-    return IOService.dispatch(FILE_CLOSE, [id]).then((result) {
+    return _IOService.dispatch(_FILE_CLOSE, [id]).then((result) {
       if (result != -1) {
         _id = result;
         return this;
       } else {
         throw new FileException("Cannot close file", path);
       }
     });
   }
 
   external static int _close(int id);
 
   void closeSync() {
     _checkNotClosed();
     var id = _close(_id);
     if (id == -1) {
       throw new FileException("Cannot close file", path);
     }
     _id = id;
   }
 
   Future<int> readByte() {
     if (closed) return _closedException();
-    return IOService.dispatch(FILE_READ_BYTE, [_id]).then((response) {
+    return _IOService.dispatch(_FILE_READ_BYTE, [_id]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "readByte failed", path);
       }
       return response;
     });
   }
 
   external static _readByte(int id);
 
   int readByteSync() {
     _checkNotClosed();
     var result = _readByte(_id);
     if (result is OSError) {
       throw new FileException("readByte failed", path, result);
     }
     return result;
   }
 
   Future<List<int>> read(int bytes) {
     if (bytes is !int) {
       throw new ArgumentError(bytes);
     }
     if (closed) return _closedException();
-    return IOService.dispatch(FILE_READ, [_id, bytes]).then((response) {
+    return _IOService.dispatch(_FILE_READ, [_id, bytes]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "read failed", path);
       }
       return response[1];
     });
   }
 
   external static _read(int id, int bytes);
 
   List<int> readSync(int bytes) {
@@ skipping 11 matching lines @@
   Future<int> readInto(List<int> buffer, [int start, int end]) {
     if (buffer is !List ||
         (start != null && start is !int) ||
         (end != null && end is !int)) {
       throw new ArgumentError();
     }
     if (closed) return _closedException();
     if (start == null) start = 0;
     if (end == null) end = buffer.length;
     int length = end - start;
-    return IOService.dispatch(FILE_READ_INTO, [_id, length]).then((response) {
+    return _IOService.dispatch(_FILE_READ_INTO, [_id, length]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "readInto failed", path);
       }
       var read = response[1];
       var data = response[2];
       buffer.setRange(start, start + read, data);
       return read;
     });
   }
 
@@ skipping 23 matching lines @@
       throw new FileException("readInto failed", path, result);
     }
     return result;
   }
 
   Future<RandomAccessFile> writeByte(int value) {
     if (value is !int) {
       throw new ArgumentError(value);
     }
     if (closed) return _closedException();
-    return IOService.dispatch(FILE_WRITE_BYTE, [_id, value]).then((response) {
+    return _IOService.dispatch(_FILE_WRITE_BYTE, [_id, value]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "writeByte failed", path);
       }
       return this;
     });
   }
 
   external static _writeByte(int id, int value);
 
   int writeByteSync(int value) {
@@ skipping 22 matching lines @@
       result = _ensureFastAndSerializableByteData(buffer, start, end);
     } catch (e) {
       return new Future.error(e);
     }
 
     List request = new List(4);
     request[0] = _id;
     request[1] = result.buffer;
     request[2] = result.start;
     request[3] = end - (start - result.start);
-    return IOService.dispatch(FILE_WRITE_FROM, request).then((response) {
+    return _IOService.dispatch(_FILE_WRITE_FROM, request).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "writeFrom failed", path);
       }
       return this;
     });
   }
 
   external static _writeFrom(int id, List<int> buffer, int start, int end);
 
   void writeFromSync(List<int> buffer, [int start, int end]) {
@@ skipping 30 matching lines @@
   void writeStringSync(String string, {Encoding encoding: UTF8}) {
     if (encoding is! Encoding) {
       throw new ArgumentError(encoding);
     }
     var data = encoding.encode(string);
     writeFromSync(data, 0, data.length);
   }
 
   Future<int> position() {
     if (closed) return _closedException();
-    return IOService.dispatch(FILE_POSITION, [_id]).then((response) {
+    return _IOService.dispatch(_FILE_POSITION, [_id]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "position failed", path);
       }
       return response;
     });
   }
 
   external static _position(int id);
 
   int positionSync() {
     _checkNotClosed();
     var result = _position(_id);
     if (result is OSError) {
       throw new FileException("position failed", path, result);
     }
     return result;
   }
 
   Future<RandomAccessFile> setPosition(int position) {
     if (closed) return _closedException();
-    return IOService.dispatch(FILE_SET_POSITION, [_id, position])
+    return _IOService.dispatch(_FILE_SET_POSITION, [_id, position])
         .then((response) {
           if (_isErrorResponse(response)) {
             throw _exceptionFromResponse(response, "setPosition failed", path);
           }
           return this;
         });
   }
 
   external static _setPosition(int id, int position);
 
   void setPositionSync(int position) {
     _checkNotClosed();
     var result = _setPosition(_id, position);
     if (result is OSError) {
       throw new FileException("setPosition failed", path, result);
     }
   }
 
   Future<RandomAccessFile> truncate(int length) {
     if (closed) return _closedException();
-    return IOService.dispatch(FILE_TRUNCATE, [_id, length]).then((response) {
+    return _IOService.dispatch(_FILE_TRUNCATE, [_id, length]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "truncate failed", path);
       }
       return this;
     });
   }
 
   external static _truncate(int id, int length);
 
   void truncateSync(int length) {
     _checkNotClosed();
     var result = _truncate(_id, length);
     if (result is OSError) {
       throw new FileException("truncate failed", path, result);
     }
   }
 
   Future<int> length() {
     if (closed) return _closedException();
-    return IOService.dispatch(FILE_LENGTH, [_id]).then((response) {
+    return _IOService.dispatch(_FILE_LENGTH, [_id]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response, "length failed", path);
       }
       return response;
     });
   }
 
   external static _length(int id);
 
   int lengthSync() {
     _checkNotClosed();
     var result = _length(_id);
     if (result is OSError) {
       throw new FileException("length failed", path, result);
     }
     return result;
   }
 
   Future<RandomAccessFile> flush() {
     if (closed) return _closedException();
-    return IOService.dispatch(FILE_FLUSH, [_id]).then((response) {
+    return _IOService.dispatch(_FILE_FLUSH, [_id]).then((response) {
       if (_isErrorResponse(response)) {
         throw _exceptionFromResponse(response,
                                      "flush failed",
                                      path);
       }
       return this;
     });
   }
 
   external static _flush(int id);
@@ skipping 11 matching lines @@
   void _checkNotClosed() {
     if (closed) {
       throw new FileException("File closed", path);
     }
   }
 
   Future _closedException() {
     return new Future.error(new FileException("File closed", path));
   }
 }