| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2002 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.nio.ch; |
| 27 | |
| 28 | import sun.misc.*; |
| 29 | |
| 30 | |
| 31 | /** |
| 32 | * Manipulates a native array of iovec structs on Solaris: |
| 33 | * |
| 34 | * typedef struct iovec { |
| 35 | * caddr_t iov_base; |
| 36 | int iov_len; |
| 37 | * } iovec_t; |
| 38 | * |
| 39 | * @author Mike McCloskey |
| 40 | * @since 1.4 |
| 41 | */ |
| 42 | |
| 43 | class IOVecWrapper { |
| 44 | |
| 45 | // Miscellaneous constants |
| 46 | static int BASE_OFFSET = 0; |
| 47 | static int LEN_OFFSET; |
| 48 | static int SIZE_IOVEC; |
| 49 | |
| 50 | // The iovec array |
| 51 | private AllocatedNativeObject vecArray; |
| 52 | |
| 53 | // Base address of this array |
| 54 | long address; |
| 55 | |
| 56 | // Address size in bytes |
| 57 | static int addressSize; |
| 58 | |
| 59 | IOVecWrapper(int newSize) { |
| 60 | newSize = (newSize + 1) * SIZE_IOVEC; |
| 61 | vecArray = new AllocatedNativeObject(newSize, false); |
| 62 | address = vecArray.address(); |
| 63 | } |
| 64 | |
| 65 | void putBase(int i, long base) { |
| 66 | int offset = SIZE_IOVEC * i + BASE_OFFSET; |
| 67 | if (addressSize == 4) |
| 68 | vecArray.putInt(offset, (int)base); |
| 69 | else |
| 70 | vecArray.putLong(offset, base); |
| 71 | } |
| 72 | |
| 73 | void putLen(int i, long len) { |
| 74 | int offset = SIZE_IOVEC * i + LEN_OFFSET; |
| 75 | if (addressSize == 4) |
| 76 | vecArray.putInt(offset, (int)len); |
| 77 | else |
| 78 | vecArray.putLong(offset, len); |
| 79 | } |
| 80 | |
| 81 | void free() { |
| 82 | vecArray.free(); |
| 83 | } |
| 84 | |
| 85 | static { |
| 86 | addressSize = Util.unsafe().addressSize(); |
| 87 | LEN_OFFSET = addressSize; |
| 88 | SIZE_IOVEC = (short) (addressSize * 2); |
| 89 | } |
| 90 | } |