Compiler Atomics, Volatile Access & Fences

include/compiler/atomic.h View source View on GitHub

Macros

ca_read_once

#define ca_read_once(x)

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Expansion

#define ca_read_once(x) (*(const volatile typeof(x) *) &(x))

ca_write_once

#define ca_write_once(x, val)

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Expansion

#define ca_write_once(x, val) \
    do { \
        *(volatile typeof(x) *) &(x) = (val); \
    } while (0)

Compiler optimization barrier

ca_barrier

#define ca_barrier()

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Expansion

#define ca_barrier() asm volatile("" ::: "memory")

ca_mb

#define ca_mb()

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Expansion

#define ca_mb() __atomic_thread_fence(__ATOMIC_SEQ_CST)

ca_rmb

#define ca_rmb()

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Expansion

#define ca_rmb() __atomic_thread_fence(__ATOMIC_ACQUIRE)

ca_wmb

#define ca_wmb()

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Expansion

#define ca_wmb() __atomic_thread_fence(__ATOMIC_RELEASE)

ca_pause

#define ca_pause()

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Expansion

#define ca_pause() asm volatile("pause" ::: "memory")

ca_pause

#define ca_pause()

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Expansion

#define ca_pause() asm volatile("isb" ::: "memory")

ca_pause

#define ca_pause()

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Expansion

#define ca_pause() ca_barrier()