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      1 /******************************************************************************/
      2 #ifdef JEMALLOC_H_TYPES
      3 
      4 typedef struct spin_s spin_t;
      5 
      6 #endif /* JEMALLOC_H_TYPES */
      7 /******************************************************************************/
      8 #ifdef JEMALLOC_H_STRUCTS
      9 
     10 struct spin_s {
     11 	unsigned iteration;
     12 };
     13 
     14 #endif /* JEMALLOC_H_STRUCTS */
     15 /******************************************************************************/
     16 #ifdef JEMALLOC_H_EXTERNS
     17 
     18 #endif /* JEMALLOC_H_EXTERNS */
     19 /******************************************************************************/
     20 #ifdef JEMALLOC_H_INLINES
     21 
     22 #ifndef JEMALLOC_ENABLE_INLINE
     23 void	spin_init(spin_t *spin);
     24 void	spin_adaptive(spin_t *spin);
     25 #endif
     26 
     27 #if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_SPIN_C_))
     28 JEMALLOC_INLINE void
     29 spin_init(spin_t *spin)
     30 {
     31 
     32 	spin->iteration = 0;
     33 }
     34 
     35 JEMALLOC_INLINE void
     36 spin_adaptive(spin_t *spin)
     37 {
     38 	volatile uint64_t i;
     39 
     40 	for (i = 0; i < (KQU(1) << spin->iteration); i++)
     41 		CPU_SPINWAIT;
     42 
     43 	if (spin->iteration < 63)
     44 		spin->iteration++;
     45 }
     46 
     47 #endif
     48 
     49 #endif /* JEMALLOC_H_INLINES */
     50 /******************************************************************************/
     51 
     52