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include/boost/container/detail/mutex.hpp  view on Meta::CPAN

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#if BOOST_MUTEX_HELPER == BOOST_MUTEX_HELPER_NONE
   //...
#elif BOOST_MUTEX_HELPER == BOOST_MUTEX_HELPER_SPINLOCKS
   #if defined(_MSC_VER)
      #ifndef _M_AMD64
         /* These are already defined on AMD64 builds */
         #ifdef __cplusplus
            extern "C" {
         #endif /* __cplusplus */
            long __cdecl _InterlockedCompareExchange(long volatile *Dest, long Exchange, long Comp);
            long __cdecl _InterlockedExchange(long volatile *Target, long Value);
         #ifdef __cplusplus
            }
         #endif /* __cplusplus */
      #endif /* _M_AMD64 */
      #pragma intrinsic (_InterlockedCompareExchange)
      #pragma intrinsic (_InterlockedExchange)
      #define interlockedcompareexchange _InterlockedCompareExchange
      #define interlockedexchange        _InterlockedExchange
   #elif defined(WIN32) && defined(__GNUC__)
      #define interlockedcompareexchange(a, b, c) __sync_val_compare_and_swap(a, c, b)
      #define interlockedexchange                 __sync_lock_test_and_set
   #endif /* Win32 */
 
   /* First, define CAS_LOCK and CLEAR_LOCK on ints */
   /* Note CAS_LOCK defined to return 0 on success */
 
   #if defined(__GNUC__)&& (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
      #define BOOST_CONTAINER_CAS_LOCK(sl)     __sync_lock_test_and_set(sl, 1)
      #define BOOST_CONTAINER_CLEAR_LOCK(sl)   __sync_lock_release(sl)
 
   #elif (defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)))

include/boost/container/detail/mutex.hpp  view on Meta::CPAN

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      __asm__ __volatile__ ("lock; xchgl %0, %1"
                              : "=r" (ret)
                              : "m" (*(sl)), "0"(prev)
                              : "memory");
   }
 
   #define BOOST_CONTAINER_CAS_LOCK(sl)     boost_container_x86_cas_lock(sl)
   #define BOOST_CONTAINER_CLEAR_LOCK(sl)   boost_container_x86_clear_lock(sl)
 
#else /* Win32 MSC */
   #define BOOST_CONTAINER_CAS_LOCK(sl)     interlockedexchange((long volatile*)sl, (long)1)
   #define BOOST_CONTAINER_CLEAR_LOCK(sl)   interlockedexchange((long volatile*)sl, (long)0)
#endif
 
/* How to yield for a spin lock */
#define SPINS_PER_YIELD       63
#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
   #define SLEEP_EX_DURATION     50 /* delay for yield/sleep */
   #define SPIN_LOCK_YIELD  SleepEx(SLEEP_EX_DURATION, FALSE)
#elif defined (__SVR4) && defined (__sun) /* solaris */
   #include <thread.h>
   #define SPIN_LOCK_YIELD   thr_yield();