1219820Sjeff/* 2219820Sjeff * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved. 3219820Sjeff * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved. 4219820Sjeff * Copyright (c) 1996-2003 Intel Corporation. All rights reserved. 5219820Sjeff * 6219820Sjeff * This software is available to you under a choice of one of two 7219820Sjeff * licenses. You may choose to be licensed under the terms of the GNU 8219820Sjeff * General Public License (GPL) Version 2, available from the file 9219820Sjeff * COPYING in the main directory of this source tree, or the 10219820Sjeff * OpenIB.org BSD license below: 11219820Sjeff * 12219820Sjeff * Redistribution and use in source and binary forms, with or 13219820Sjeff * without modification, are permitted provided that the following 14219820Sjeff * conditions are met: 15219820Sjeff * 16219820Sjeff * - Redistributions of source code must retain the above 17219820Sjeff * copyright notice, this list of conditions and the following 18219820Sjeff * disclaimer. 19219820Sjeff * 20219820Sjeff * - Redistributions in binary form must reproduce the above 21219820Sjeff * copyright notice, this list of conditions and the following 22219820Sjeff * disclaimer in the documentation and/or other materials 23219820Sjeff * provided with the distribution. 24219820Sjeff * 25219820Sjeff * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26219820Sjeff * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27219820Sjeff * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28219820Sjeff * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29219820Sjeff * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30219820Sjeff * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31219820Sjeff * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32219820Sjeff * SOFTWARE. 33219820Sjeff * 34219820Sjeff */ 35219820Sjeff 36219820Sjeff/* 37219820Sjeff * Abstract: 38219820Sjeff * Turns on byte packing, which is necessary for passing information from 39219820Sjeff * system to system over a network to ensure no padding by the compiler has 40219820Sjeff * taken place. 41219820Sjeff */ 42219820Sjeff 43219820Sjeff/****h* Component Library/Structure Packing 44219820Sjeff* NAME 45219820Sjeff* Structure Packing 46219820Sjeff* 47219820Sjeff* DESCRIPTION 48219820Sjeff* The structure packing header files allow packing structures on byte 49219820Sjeff* boundaries. 50219820Sjeff* 51219820Sjeff* Structure packing should be used whenever a structure is transmitted 52219820Sjeff* between systems, as different platforms pad structures differently if 53219820Sjeff* they are not packed. Packing a structure that is not transmitted between 54219820Sjeff* systems can be detrimental to performance, as fields in the structure may 55219820Sjeff* not align properly for some platforms. Care must be taken when creating 56219820Sjeff* packed structures that the alignment rules for all platforms are followed. 57219820Sjeff* 58219820Sjeff* To pack a structure, include ipackon.h before defining the structure, and 59219820Sjeff* include ipackoff.h after the structure definition. Multiple structures 60219820Sjeff* can be packed between the two include statements if desired. 61219820Sjeff* 62219820Sjeff* The structure definition itself must use the PACK_SUFFIX keyword. 63219820Sjeff* 64219820Sjeff* EXAMPLE 65219820Sjeff* #include <complib/ipackon.h> 66219820Sjeff* 67219820Sjeff* typedef _my_struct_t 68219820Sjeff* { 69219820Sjeff* uint64 large; 70219820Sjeff* uint32 medium; 71219820Sjeff* uint16 small; 72219820Sjeff* 73219820Sjeff* } PACK_SUFFIX my_struct_t; 74219820Sjeff* #include <complib/ipackoff.h> 75219820Sjeff*********/ 76219820Sjeff 77219820Sjeff#ifndef PACK_SUFFIX 78219820Sjeff#define PACK_SUFFIX __attribute__((packed)) 79219820Sjeff#endif 80219820Sjeff 81219820Sjeff#ifdef _MSC_VER 82219820Sjeff#pragma pack (push, 1) 83219820Sjeff#endif 84