110 строки
2.5 KiB
C
110 строки
2.5 KiB
C
/*
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* $HEADER$
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*/
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#ifndef OMPI_SYS_ATOMIC_H_INCLUDED
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#define OMPI_SYS_ATOMIC_H_INCLUDED
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/*
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* On sparc64, use casa and casxa (compare and swap) instructions.
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*/
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#define ASI_P "0x80"
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#ifdef HAVE_SMP
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#define MEMBAR(type) __asm__ __volatile__ ("membar" type : : : "memory")
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#else
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#define MEMBAR(type)
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#endif
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static inline void ompi_atomic_mb(void)
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{
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MEMBAR("#LoadLoad | #LoadStore | #StoreStore | #StoreLoad");
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}
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static inline void ompi_atomic_rmb(void)
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{
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MEMBAR("#LoadLoad");
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}
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static inline void ompi_atomic_wmb(void)
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{
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MEMBAR("#StoreStore");
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}
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static inline int ompi_atomic_cmpset_32(volatile uint32_t *addr,
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uint32_t oldval,
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uint32_t newval)
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{
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uint32_t ret = oldval;
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__asm__ __volatile("casa [%1] " ASI_P ", %2, %0"
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: "+r" (ret)
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: "r" (addr), "r" (newval));
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return (ret == oldval);
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}
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static inline int ompi_atomic_cmpset_acq_32(volatile uint32_t *addr,
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uint32_t oldval,
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uint32_t newval)
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{
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int rc;
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rc = ompi_atomic_cmpset_32(addr, oldval, newval);
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ompi_atomic_rmb();
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return rc;
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}
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static inline int ompi_atomic_cmpset_rel_32(volatile uint32_t *addr,
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uint32_t oldval,
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uint32_t newval)
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{
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ompi_atomic_wmb();
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return ompi_atomic_cmpset_32(addr, oldval, newval);
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}
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static inline int ompi_atomic_cmpset_64(volatile uint64_t *addr,
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uint64_t oldval,
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uint64_t newval)
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{
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uint64_t ret = oldval;
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__asm__ __volatile("casxa [%1] " ASI_P ", %2, %0"
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: "+r" (ret)
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: "r" (addr), "r" (newval));
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return (ret == oldval);
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}
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static inline int ompi_atomic_cmpset_acq_64(volatile uint64_t *addr,
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uint64_t oldval,
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uint64_t newval)
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{
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int rc;
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rc = ompi_atomic_cmpset_64(addr, oldval, newval);
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ompi_atomic_rmb();
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return rc;
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}
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static inline int ompi_atomic_cmpset_rel_64(volatile uint64_t *addr,
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uint64_t oldval,
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uint64_t newval)
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{
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ompi_atomic_wmb();
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return ompi_atomic_cmpset_64(addr, oldval, newval);
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}
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#endif /* ! OMPI_SYS_ATOMIC_H_INCLUDED */
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