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137 lines
4.4 KiB
137 lines
4.4 KiB
/*
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* Declare directives for structure packing. No padding will be provided
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* between the members of packed structures, and therefore, there is no
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* guarantee that structure members will be aligned.
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*
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* Declaring packed structures is compiler specific. In order to handle all
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* cases, packed structures should be delared as:
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*
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* #include <packed_section_start.h>
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*
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* typedef BWL_PRE_PACKED_STRUCT struct foobar_t {
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* some_struct_members;
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* } BWL_POST_PACKED_STRUCT foobar_t;
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*
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* #include <packed_section_end.h>
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*
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*
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* Copyright (C) 2024 Synaptics Incorporated. All rights reserved.
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*
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* This software is licensed to you under the terms of the
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* GNU General Public License version 2 (the "GPL") with Broadcom special exception.
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*
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* INFORMATION CONTAINED IN THIS DOCUMENT IS PROVIDED "AS-IS," AND SYNAPTICS
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* EXPRESSLY DISCLAIMS ALL EXPRESS AND IMPLIED WARRANTIES, INCLUDING ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
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* AND ANY WARRANTIES OF NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHTS.
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* IN NO EVENT SHALL SYNAPTICS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OF THE INFORMATION CONTAINED IN THIS DOCUMENT, HOWEVER CAUSED
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* AND BASED ON ANY THEORY OF LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, AND EVEN IF SYNAPTICS WAS ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE. IF A TRIBUNAL OF COMPETENT JURISDICTION
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* DOES NOT PERMIT THE DISCLAIMER OF DIRECT DAMAGES OR ANY OTHER DAMAGES,
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* SYNAPTICS' TOTAL CUMULATIVE LIABILITY TO ANY PARTY SHALL NOT
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* EXCEED ONE HUNDRED U.S. DOLLARS
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*
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* Copyright (C) 2024, Broadcom.
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2 (the "GPL"),
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* available at http://www.broadcom.com/licenses/GPLv2.php, with the
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* following added to such license:
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*
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* As a special exception, the copyright holders of this software give you
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* permission to link this software with independent modules, and to copy and
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* distribute the resulting executable under terms of your choice, provided that
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* you also meet, for each linked independent module, the terms and conditions of
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* the license of that module. An independent module is a module which is not
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* derived from this software. The special exception does not apply to any
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* modifications of the software.
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*
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*
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* <<Broadcom-WL-IPTag/Dual:>>
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*/
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/* EFI does not support STATIC_ASSERT */
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#if defined(EFI)
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#define _alignment_test_
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#endif /* EFI */
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#ifndef _alignment_test_
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#define _alignment_test_
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/* ASSERT default packing */
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typedef struct T4 {
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uint8 a;
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uint32 b;
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uint16 c;
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uint8 d;
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} T4_t;
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/* 4 byte alignment support */
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/*
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* a . . .
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* b b b b
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* c c d .
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*/
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/*
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* Below function is meant to verify that this file is compiled with the default alignment of 4.
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* Function will fail to compile if the condition is not met.
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*/
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#ifdef __GNUC__
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#define VARIABLE_IS_NOT_USED __attribute__ ((unused))
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#else
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#define VARIABLE_IS_NOT_USED
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#endif
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static void alignment_test(void);
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static void
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VARIABLE_IS_NOT_USED alignment_test(void)
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{
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/* verify 4 byte alignment support */
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STATIC_ASSERT(sizeof(T4_t) == 12);
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}
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#endif /* _alignment_test_ */
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/* Error check - BWL_PACKED_SECTION is defined in packed_section_start.h
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* and undefined in packed_section_end.h. If it is already defined at this
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* point, then there is a missing include of packed_section_end.h.
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*/
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#ifdef BWL_PACKED_SECTION
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#error "BWL_PACKED_SECTION is already defined!"
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#else
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#define BWL_PACKED_SECTION
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#endif
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#if defined(BWL_DEFAULT_PACKING)
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/* generate an error if BWL_DEFAULT_PACKING is defined */
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#error "BWL_DEFAULT_PACKING not supported any more."
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#endif /* BWL_PACKED_SECTION */
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#if defined(_MSC_VER)
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#pragma warning(disable:4103)
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#pragma pack(push)
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#pragma pack(1)
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#endif
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#if defined(__GNUC__) && defined(EFI)
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#pragma pack(push)
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#pragma pack(1)
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#endif
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/* Declare compiler-specific directives for structure packing. */
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#if defined(_MSC_VER)
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#define BWL_PRE_PACKED_STRUCT
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#define BWL_POST_PACKED_STRUCT
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#elif defined(__GNUC__) || defined(__lint)
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#define BWL_PRE_PACKED_STRUCT
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#define BWL_POST_PACKED_STRUCT __attribute__ ((packed))
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#elif defined(__CC_ARM)
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#define BWL_PRE_PACKED_STRUCT __packed
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#define BWL_POST_PACKED_STRUCT
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#else
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#error "Unknown compiler!"
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#endif
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