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Constraints fixed for g++ 3.4, atomic_increment added

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[SVN r27958]
This commit is contained in:
Peter Dimov
2005-04-04 19:36:18 +00:00
parent 1942b64751
commit f1a9148a43
1 changed files with 19 additions and 5 deletions
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24
include/boost/detail/sp_counted_base_gcc_x86.hpp
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@ -45,13 +45,27 @@ inline long atomic_exchange_and_add( long * pw, long dv )
"lock\n\t"
"xadd %1, %0":
"=m"( *pw ), "=r"( r ): // outputs (%0, %1)
"0"( *pw ), "1"( dv ): // inputs (%0, %1)
"m"( *pw ), "1"( dv ): // inputs (%2, %3 == %1)
"memory", "cc" // clobbers
);
return r;
}
inline void atomic_increment( long * pw )
{
//atomic_exchange_and_add( pw, 1 );
__asm__
(
"lock\n\t"
"incl %0":
"=m"( *pw ): // output (%0)
"m"( *pw ): // input (%1)
"cc" // clobbers
);
}
inline long atomic_conditional_increment( long * pw )
{
// long r = *pw;
@ -72,7 +86,7 @@ inline long atomic_conditional_increment( long * pw )
"jne 0b\n\t"
"1:":
"=m"( *pw ), "=&eax"( r ): // outputs (%0, %1)
"0"( *pw ): // input (%0)
"m"( *pw ): // input (%2)
"ebx", "memory", "cc" // clobbers
);
@ -115,12 +129,12 @@ public:
void add_ref_copy()
{
atomic_exchange_and_add( &use_count_, +1 );
atomic_increment( &use_count_ );
}
bool add_ref_lock() // true on success
{
return atomic_conditional_increment( &use_count_ ) != 0;
return atomic_conditional_increment( &use_count_ ) != 0;
}
void release() // nothrow
@ -134,7 +148,7 @@ public:
void weak_add_ref() // nothrow
{
atomic_exchange_and_add( &weak_count_, +1 );
atomic_increment( &weak_count_ );
}
void weak_release() // nothrow