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Merge [77315] to release. Closes #5331.

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[SVN r77317]
This commit is contained in:
Peter Dimov
2012-03-12 17:37:51 +00:00
parent 3090f6f4af
commit 5979c1d4bd
1 changed files with 27 additions and 2 deletions
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29
include/boost/smart_ptr/detail/spinlock_gcc_arm.hpp
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@ -43,13 +43,38 @@ public:
{
int r;
#if defined(__ARM_ARCH_6__) \
|| defined(__ARM_ARCH_6J__) \
|| defined(__ARM_ARCH_6K__) \
|| defined(__ARM_ARCH_6Z__) \
|| defined(__ARM_ARCH_6ZK__) \
|| defined(__ARM_ARCH_6T2__) \
|| defined(__ARM_ARCH_7__) \
|| defined(__ARM_ARCH_7A__) \
|| defined(__ARM_ARCH_7R__) \
|| defined(__ARM_ARCH_7M__) \
|| defined(__ARM_ARCH_7EM__)
__asm__ __volatile__(
"swp %0, %1, [%2]\n\t"
BOOST_SP_ARM_BARRIER :
"ldrex %0, [%2]; \n"
"cmp %0, %1; \n"
"strexne %0, %1, [%2]; \n"
BOOST_SP_ARM_BARRIER :
"=&r"( r ): // outputs
"r"( 1 ), "r"( &v_ ): // inputs
"memory", "cc" );
#else
__asm__ __volatile__(
"swp %0, %1, [%2];\n"
BOOST_SP_ARM_BARRIER :
"=&r"( r ): // outputs
"r"( 1 ), "r"( &v_ ): // inputs
"memory", "cc" );
#endif
return r == 0;
}