ObjFW  Check-in [c2af363418]

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Comment:Check for atomic ops in configure.ac.
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SHA3-256: c2af363418c0d7cccee3b040ad3fc95b495ec2951c4cc03ff2779538d3a7e673
User & Date: js on 2010-01-25 22:14:46
Other Links: manifest | tags
Context
2010-01-25
22:34
clang does not reuse constant strings, thus fix test to use the same. check-in: 612a252fdf user: js tags: trunk
22:14
Check for atomic ops in configure.ac. check-in: c2af363418 user: js tags: trunk
15:22
Make retain counter 32 bit due to atomic ops being 32 bit. check-in: 831ebcd4f5 user: js tags: trunk
Changes
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Modified configure.ac from [7d51f7e767] to [1f580f5aef].

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	AC_SUBST(THREADING_H, "threading.h")

	AC_CHECK_FUNC(objc_sync_enter,, [
		AC_SUBST(OBJC_SYNC_M, "objc_sync.m")
		AC_DEFINE(NEED_OBJC_SYNC_INIT, 1,
			[Whether objc_sync_init needs to be called])])



























	AC_CHECK_HEADER(libkern/OSAtomic.h, [

		AC_DEFINE(OF_HAVE_LIBKERN_OSATOMIC_H, 1,
			[Whether we have libkern/OSAtomic.h])])











fi

AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
AC_CHECK_LIB(ws2_32, main, LIBS="$LIBS -lws2_32")

AC_MSG_CHECKING(for getaddrinfo)
AC_TRY_COMPILE([








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	AC_SUBST(THREADING_H, "threading.h")

	AC_CHECK_FUNC(objc_sync_enter,, [
		AC_SUBST(OBJC_SYNC_M, "objc_sync.m")
		AC_DEFINE(NEED_OBJC_SYNC_INIT, 1,
			[Whether objc_sync_init needs to be called])])

	AC_TRY_LINK([#include <stdint.h>], [
		int32_t i, j;
		if (__sync_add_and_fetch(&i, 1))
			j = __sync_sub_and_fetch(&i, 1);
		while (!__sync_bool_compare_and_swap(&i, 0, 1));
		], [
		have_gcc_atomic_ops="yes"
		AC_DEFINE(OF_HAVE_GCC_ATOMIC_OPS, 1,
			[Whether gcc atomic operations are available])
		], [
		old_OBJCFLAGS="$OBJCFLAGS"
		OBJCFLAGS="$OBJCFLAGS -march=i486"
		AC_TRY_LINK([#include <stdint.h>], [
			int32_t i, j;
			if (__sync_add_and_fetch(&i, 1))
				j = __sync_sub_and_fetch(&i, 1);
			while (!__sync_bool_compare_and_swap(&i, 0, 1));
			], [
			have_gcc_atomic_ops="yes"
			AC_DEFINE(OF_HAVE_GCC_ATOMIC_OPS, 1,
				[Whether gcc atomic operations are available])
			], [
			have_gcc_atomic_ops="no"
			OBJCFLAGS="$old_OBJCFLAGS"])])

	if test x"$have_gcc_atomic_ops" != x"yes"; then
		AC_CHECK_HEADER(libkern/OSAtomic.h, [
			have_libkern_osatomic_h="yes"
			AC_DEFINE(OF_HAVE_LIBKERN_OSATOMIC_H, 1,
				[Whether we have libkern/OSAtomic.h])])
	fi

	AC_MSG_CHECKING(for atomic operations)
	if test x"$have_gcc_atomic_ops" = x"yes"; then
		AC_MSG_RESULT(gcc builtins)
	elif test x"$have_libkern_osatomic_h" = x"yes"; then
		AC_MSG_RESULT(libkern/OSAtomic.h)
	else
		AC_MSG_RESULT(none)
		AC_MSG_ERROR(No atomic operations found! Try --disable-threads.)
	fi
fi

AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
AC_CHECK_LIB(ws2_32, main, LIBS="$LIBS -lws2_32")

AC_MSG_CHECKING(for getaddrinfo)
AC_TRY_COMPILE([
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Modified src/atomic.h from [34bfd081ab] to [10a1c95236].

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 */

#import "objfw-defs.h"

#if !defined(OF_THREADS)
# define of_atomic_inc32(p) ++(*p)
# define of_atomic_dec32(p) --(*p)
#elif __GNUC_MINOR__ >= 1
# define of_atomic_inc32(p) __sync_add_and_fetch(p, 1)
# define of_atomic_dec32(p) __sync_sub_and_fetch(p, 1)
#elif OF_HAVE_LIBKERN_OSATOMIC_H
# include <libkern/OSAtomic.h>
# define of_atomic_inc32(p) OSAtomicIncrement32Barrier((int32_t*)(p))
# define of_atomic_dec32(p) OSAtomicDecrement32Barrier((int32_t*)(p))
#else
# error No atomic operations available!
#endif








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 */

#import "objfw-defs.h"

#if !defined(OF_THREADS)
# define of_atomic_inc32(p) ++(*p)
# define of_atomic_dec32(p) --(*p)
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
# define of_atomic_inc32(p) __sync_add_and_fetch(p, 1)
# define of_atomic_dec32(p) __sync_sub_and_fetch(p, 1)
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
# include <libkern/OSAtomic.h>
# define of_atomic_inc32(p) OSAtomicIncrement32Barrier((int32_t*)(p))
# define of_atomic_dec32(p) OSAtomicDecrement32Barrier((int32_t*)(p))
#else
# error No atomic operations available!
#endif

Modified src/objfw-defs.h.in from [a4810732ab] to [77d9244302]. 

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#undef OF_APPLE_RUNTIME
#undef OF_BIG_ENDIAN
#undef OF_GNU_RUNTIME
#undef OF_HAVE_ASPRINTF

#undef OF_HAVE_LIBKERN_OSATOMIC_H
#undef OF_PLUGINS
#undef OF_THREADS
#undef SIZE_MAX





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#undef OF_APPLE_RUNTIME
#undef OF_BIG_ENDIAN
#undef OF_GNU_RUNTIME
#undef OF_HAVE_ASPRINTF
#undef OF_HAVE_GCC_ATOMIC_OPS
#undef OF_HAVE_LIBKERN_OSATOMIC_H
#undef OF_PLUGINS
#undef OF_THREADS
#undef SIZE_MAX