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Diffstat (limited to 'src/include/packed_section_start.h')
-rw-r--r-- | src/include/packed_section_start.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/include/packed_section_start.h b/src/include/packed_section_start.h new file mode 100644 index 0000000..4922850 --- /dev/null +++ b/src/include/packed_section_start.h @@ -0,0 +1,48 @@ +/* + * 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) 2015, Broadcom Corporation. 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. + * $Id: packed_section_start.h 395414 2013-04-07 19:26:09Z $ + */ + +#ifdef BWL_PACKED_SECTION + #error "BWL_PACKED_SECTION is already defined!" +#else + #define BWL_PACKED_SECTION +#endif + +#if 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 |