ObjFW  Check-in [932bc09a31]

Overview
Comment:atomic.h: Work around a bug in GCC's inline asm.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA3-256: 932bc09a315368709b3cf0f81af2d19bcf5aefb00c9cb2d1632d0e406d5a606d
User & Date: js on 2012-07-10 22:39:51
Other Links: manifest | tags
Context
2012-07-11
08:30
exception.m: Fix a missing free. check-in: cc68082389 user: js tags: trunk
2012-07-10
22:39
atomic.h: Work around a bug in GCC's inline asm. check-in: 932bc09a31 user: js tags: trunk
22:01
New platforms list. check-in: 1d67417011 user: js tags: trunk
Changes
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Modified PLATFORMS.md from [2ef92fe7db] to [83bcf0c182]. 

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Platforms
=========

ObjFW is known to work on the following platforms, but should run on many
others as well.


Linux
-----

 * Architectures: x86, x86_64
 * Compilers: Clang 3.1, GCC 4.7.1
 * Compilers: Clang 3.0-3.1, GCC 4.7.1
 * Runtimes: ObjFW


MacOS X
-------

  * OS versions: 10.7
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Modified src/atomic.h from [fe9035342d] to [cfff404a91].

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	__asm__ (
	    "xorl	%0, %0\n\t"
	    "lock\n\t"
	    "cmpxchg	%2, %3\n\t"
	    "sete	%b0\n\t"
	    "movzbl	%b0, %0"
	    : "=&r"(r)
	    : "=&d"(r)	/* use d instead of r due to gcc bug */
	    : "a"(o), "r"(n), "m"(*p)
	);

	return r;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
	return __sync_bool_compare_and_swap(p, o, n);
#elif defined(OF_HAVE_OSATOMIC)
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	__asm__ (
	    "xorl	%0, %0\n\t"
	    "lock\n\t"
	    "cmpxchg	%2, %3\n\t"
	    "sete	%b0\n\t"
	    "movzbl	%b0, %0"
	    : "=&r"(r)
	    : "=&d"(r)	/* use d instead of r due to gcc bug */
	    : "a"(o), "r"(n), "m"(*p)
	);

	return r;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
	return __sync_bool_compare_and_swap(p, o, n);
#elif defined(OF_HAVE_OSATOMIC)
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	__asm__ (
	    "xorl	%0, %0\n\t"
	    "lock\n\t"
	    "cmpxchg	%2, %3\n\t"
	    "sete	%b0\n\t"
	    "movzbl	%b0, %0"
	    : "=&r"(r)
	    : "=&d"(r)	/* use d instead of r due to gcc bug */
	    : "a"(o), "r"(n), "m"(*p)
	);

	return r;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
	return __sync_bool_compare_and_swap(p, o, n);
#elif defined(OF_HAVE_OSATOMIC)
	return OSAtomicCompareAndSwapPtrBarrier(o, n, p);
#endif
}

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