ObjFW  Check-in [fdfb2be253]

Overview
Comment:macros.h: Add OF_BIGGEST_ALIGNMENT.

When the compiler supports C11, _Alignof(max_align_t) is used; otherwise
the __BIGGEST_ALIGNMENT__ define is tried with a fallback to 16.

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SHA3-256: fdfb2be253355728cb832bdee5cb0592b946845d7fc0e34cb8e3862ec80c8224
User & Date: js on 2013-12-07 17:30:17
Other Links: manifest | tags
Context
2013-12-08
17:43
Clean up OFHash and the Hashing categories. check-in: 75f2aa5096 user: js tags: trunk
2013-12-07
17:30
macros.h: Add OF_BIGGEST_ALIGNMENT. check-in: fdfb2be253 user: js tags: trunk
16:56
macros.h: Make sure static_assert is defined. check-in: 71ebf4e8fe user: js tags: trunk
Changes
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Modified configure.ac from [01527acc38] to [a4257c1394].

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	], [
		AC_MSG_RESULT(no)
		size_max="(~(size_t)0)"
	])
	AC_DEFINE_UNQUOTED(SIZE_MAX, $size_max, [Maximum value for size_t])
])




AC_CHECK_SIZEOF(float)
AC_CHECK_SIZEOF(double)
AS_IF([test x"$ac_cv_sizeof_float" != x"4" -o x"$ac_cv_sizeof_double" != x"8"],
	[AC_MSG_ERROR(
		[Floating point implementation does not conform to IEEE 754!])])

AC_MSG_CHECKING(for floating point endianess)








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	], [
		AC_MSG_RESULT(no)
		size_max="(~(size_t)0)"
	])
	AC_DEFINE_UNQUOTED(SIZE_MAX, $size_max, [Maximum value for size_t])
])

AC_CHECK_TYPE(max_align_t,
	[AC_DEFINE(OF_HAVE_MAX_ALIGN_T, 1, [Whether we have max_align_t])])

AC_CHECK_SIZEOF(float)
AC_CHECK_SIZEOF(double)
AS_IF([test x"$ac_cv_sizeof_float" != x"4" -o x"$ac_cv_sizeof_double" != x"8"],
	[AC_MSG_ERROR(
		[Floating point implementation does not conform to IEEE 754!])])

AC_MSG_CHECKING(for floating point endianess)
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Modified src/OFObject.m from [585ebe6665] to [fcedcc72d4].

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struct pre_mem {
	struct pre_mem *prev, *next;
	id owner;
};

#define PRE_IVARS_ALIGN ((sizeof(struct pre_ivar) + \
	(__BIGGEST_ALIGNMENT__ - 1)) & ~(__BIGGEST_ALIGNMENT__ - 1))
#define PRE_IVARS ((struct pre_ivar*)(void*)((char*)self - PRE_IVARS_ALIGN))

#define PRE_MEM_ALIGN ((sizeof(struct pre_mem) + \
	(__BIGGEST_ALIGNMENT__ - 1)) & ~(__BIGGEST_ALIGNMENT__ - 1))
#define PRE_MEM(mem) ((struct pre_mem*)(void*)((char*)mem - PRE_MEM_ALIGN))

static struct {
	Class isa;
} allocFailedException;

uint32_t of_hash_seed;








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struct pre_mem {
	struct pre_mem *prev, *next;
	id owner;
};

#define PRE_IVARS_ALIGN ((sizeof(struct pre_ivar) + \
	(OF_BIGGEST_ALIGNMENT - 1)) & ~(OF_BIGGEST_ALIGNMENT - 1))
#define PRE_IVARS ((struct pre_ivar*)(void*)((char*)self - PRE_IVARS_ALIGN))

#define PRE_MEM_ALIGN ((sizeof(struct pre_mem) + \
	(OF_BIGGEST_ALIGNMENT - 1)) & ~(OF_BIGGEST_ALIGNMENT - 1))
#define PRE_MEM(mem) ((struct pre_mem*)(void*)((char*)mem - PRE_MEM_ALIGN))

static struct {
	Class isa;
} allocFailedException;

uint32_t of_hash_seed;
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Modified src/macros.h from [4fb27cba60] to [d51c5fe23d].

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#ifdef OF_BIG_ENDIAN
# define OF_BYTE_ORDER_NATIVE OF_BYTE_ORDER_BIG_ENDIAN
#else
# define OF_BYTE_ORDER_NATIVE OF_BYTE_ORDER_LITTLE_ENDIAN
#endif







/* Hopefully no arch needs more than 16 bytes padding */
#ifndef __BIGGEST_ALIGNMENT__
# define __BIGGEST_ALIGNMENT__ 16
#endif

#ifdef __GNUC__
# if defined(__amd64__) || defined(__x86_64__)
#  define OF_AMD64_ASM
# elif defined(__i386__)
#  define OF_X86_ASM








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#ifdef OF_BIG_ENDIAN
# define OF_BYTE_ORDER_NATIVE OF_BYTE_ORDER_BIG_ENDIAN
#else
# define OF_BYTE_ORDER_NATIVE OF_BYTE_ORDER_LITTLE_ENDIAN
#endif

#if __STDC_VERSION__ >= 201112L && defined(OF_HAVE_MAX_ALIGN_T)
# define OF_BIGGEST_ALIGNMENT _Alignof(max_align_t)
#else
# ifdef __BIGGEST_ALIGNMENT__
#  define OF_BIGGEST_ALIGNMENT __BIGGEST_ALIGNMENT__
# else
#  /* Hopefully no arch needs more than 16 bytes padding */
#  define OF_BIGGEST_ALIGNMENT 16
# endif
#endif

#ifdef __GNUC__
# if defined(__amd64__) || defined(__x86_64__)
#  define OF_AMD64_ASM
# elif defined(__i386__)
#  define OF_X86_ASM
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Modified src/objfw-defs.h.in from [ccf2bf99fc] to [449e8f592b]. 

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#undef OF_APPLE_RUNTIME
#undef OF_BIG_ENDIAN
#undef OF_FLOAT_BIG_ENDIAN
#undef OF_HAVE_ASPRINTF
#undef OF_HAVE_ATOMIC_OPS
#undef OF_HAVE_CHMOD
#undef OF_HAVE_CHOWN
#undef OF_HAVE_COMPILER_TLS
#undef OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR
#undef OF_HAVE_GCC_ATOMIC_OPS
#undef OF_HAVE_LINK

#undef OF_HAVE_OSATOMIC
#undef OF_HAVE_OSATOMIC_64
#undef OF_HAVE_PIPE
#undef OF_HAVE_PLUGINS
#undef OF_HAVE_PROCESSES
#undef OF_HAVE_PTHREADS
#undef OF_HAVE_PTHREAD_SPINLOCKS












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#undef OF_APPLE_RUNTIME
#undef OF_BIG_ENDIAN
#undef OF_FLOAT_BIG_ENDIAN
#undef OF_HAVE_ASPRINTF
#undef OF_HAVE_ATOMIC_OPS
#undef OF_HAVE_CHMOD
#undef OF_HAVE_CHOWN
#undef OF_HAVE_COMPILER_TLS
#undef OF_HAVE_FORWARDING_TARGET_FOR_SELECTOR
#undef OF_HAVE_GCC_ATOMIC_OPS
#undef OF_HAVE_LINK
#undef OF_HAVE_MAX_ALIGN_T
#undef OF_HAVE_OSATOMIC
#undef OF_HAVE_OSATOMIC_64
#undef OF_HAVE_PIPE
#undef OF_HAVE_PLUGINS
#undef OF_HAVE_PROCESSES
#undef OF_HAVE_PTHREADS
#undef OF_HAVE_PTHREAD_SPINLOCKS
︙︙

Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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