| /* |
| * Declare directives for structure packing. No padding will be provided |
| * between the members of packed structures, and therefore, there is no |
| * guarantee that structure members will be aligned. |
| * |
| * Declaring packed structures is compiler specific. In order to handle all |
| * cases, packed structures should be delared as: |
| * |
| * #include <packed_section_start.h> |
| * |
| * typedef BWL_PRE_PACKED_STRUCT struct foobar_t { |
| * some_struct_members; |
| * } BWL_POST_PACKED_STRUCT foobar_t; |
| * |
| * #include <packed_section_end.h> |
| * |
| * |
| * Copyright (C) 2017, Broadcom. All Rights Reserved. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| * |
| * |
| * <<Broadcom-WL-IPTag/Open:>> |
| * |
| * $Id: packed_section_start.h 660529 2016-09-20 23:01:03Z $ |
| */ |
| |
| |
| #ifndef _alignment_test_ |
| #define _alignment_test_ |
| |
| /* ASSERT default packing */ |
| typedef struct T4 { |
| uint8 a; |
| uint32 b; |
| uint16 c; |
| uint8 d; |
| } T4_t; |
| |
| /* 4 byte alignment support */ |
| /* |
| * a . . . |
| * b b b b |
| * c c d . |
| */ |
| |
| /* |
| * Below function is meant to verify that this file is compiled with the default alignment of 4. |
| * Function will fail to compile if the condition is not met. |
| */ |
| #ifdef __GNUC__ |
| #define VARIABLE_IS_NOT_USED __attribute__ ((unused)) |
| #else |
| #define VARIABLE_IS_NOT_USED |
| #endif |
| static void alignment_test(void); |
| static void |
| VARIABLE_IS_NOT_USED alignment_test(void) |
| { |
| /* verify 4 byte alignment support */ |
| STATIC_ASSERT(sizeof(T4_t) == 12); |
| } |
| #endif /* _alignment_test_ */ |
| |
| |
| /* Error check - BWL_PACKED_SECTION is defined in packed_section_start.h |
| * and undefined in packed_section_end.h. If it is already defined at this |
| * point, then there is a missing include of packed_section_end.h. |
| */ |
| #ifdef BWL_PACKED_SECTION |
| #error "BWL_PACKED_SECTION is already defined!" |
| #else |
| #define BWL_PACKED_SECTION |
| #endif |
| |
| #if defined(BWL_DEFAULT_PACKING) |
| /* generate an error if BWL_DEFAULT_PACKING is defined */ |
| #error "BWL_DEFAULT_PACKING not supported any more." |
| #endif /* BWL_PACKED_SECTION */ |
| |
| #if defined(_MSC_VER) |
| #pragma warning(disable:4103) |
| #pragma pack(push) |
| #pragma pack(1) |
| #endif |
| |
| /* Declare compiler-specific directives for structure packing. */ |
| #if defined(_MSC_VER) |
| #define BWL_PRE_PACKED_STRUCT |
| #define BWL_POST_PACKED_STRUCT |
| #elif defined(__GNUC__) || defined(__lint) |
| #define BWL_PRE_PACKED_STRUCT |
| #define BWL_POST_PACKED_STRUCT __attribute__ ((packed)) |
| #elif defined(__CC_ARM) |
| #define BWL_PRE_PACKED_STRUCT __packed |
| #define BWL_POST_PACKED_STRUCT |
| #else |
| #error "Unknown compiler!" |
| #endif |