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BOOST_SMT_PAUSE factored out.

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[SVN r44056]
This commit is contained in:
Peter Dimov
2008-04-05 15:23:28 +00:00
parent acb6824ef7
commit 373c52efa3
1 changed files with 21 additions and 9 deletions
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30
include/boost/detail/yield_k.hpp
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@ -25,17 +25,29 @@
#include <boost/config.hpp> #include <boost/config.hpp>
// BOOST_SMT_PAUSE
#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) )
extern "C" void _mm_pause();
#pragma intrinsic( _mm_pause )
#define BOOST_SMT_PAUSE _mm_pause();
#elif defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) )
#define BOOST_SMT_PAUSE __asm__ __volatile__( "rep; nop" ::: "memory" );
#endif
//
#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ ) #if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
#if defined( BOOST_USE_WINDOWS_H ) #if defined( BOOST_USE_WINDOWS_H )
# include <windows.h> # include <windows.h>
#endif #endif
#if defined(_MSC_VER) && _MSC_VER >= 1310
extern "C" void _mm_pause();
# pragma intrinsic( _mm_pause )
#endif
namespace boost namespace boost
{ {
@ -51,10 +63,10 @@ inline void yield( unsigned k )
if( k < 4 ) if( k < 4 )
{ {
} }
#if defined(_MSC_VER) && _MSC_VER >= 1310 #if defined( BOOST_SMT_PAUSE )
else if( k < 16 ) else if( k < 16 )
{ {
_mm_pause(); BOOST_SMT_PAUSE
} }
#endif #endif
else if( k < 32 ) else if( k < 32 )
@ -87,10 +99,10 @@ inline void yield( unsigned k )
if( k < 4 ) if( k < 4 )
{ {
} }
#if defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) ) #if defined( BOOST_SMT_PAUSE )
else if( k < 16 ) else if( k < 16 )
{ {
__asm__ __volatile__( "rep; nop" ::: "memory" ); BOOST_SMT_PAUSE
} }
#endif #endif
else if( k < 32 || k & 1 ) else if( k < 32 || k & 1 )