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lib: add atomic bitwise OR, AND
* Add support for C11 bitwise OR & AND operations * Add atomic versions of bitfield macros Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
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@ -46,6 +46,8 @@
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#define atomic_exchange_explicit __atomic_exchange_n
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#define atomic_fetch_add_explicit __atomic_fetch_add
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#define atomic_fetch_sub_explicit __atomic_fetch_sub
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#define atomic_fetch_and_explicit __atomic_fetch_and
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#define atomic_fetch_or_explicit __atomic_fetch_or
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#define atomic_compare_exchange_weak_explicit(atom, expect, desire, mem1, \
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mem2) \
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@ -135,6 +137,20 @@
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*_expect = rval; \
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ret; \
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})
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#define atomic_fetch_and_explicit(ptr, val, mem) \
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({ \
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__sync_synchronize(); \
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typeof(*ptr) rval = __sync_fetch_and_and(ptr, val); \
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__sync_synchronize(); \
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rval; \
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})
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#define atomic_fetch_or_explicit(ptr, val, mem) \
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({ \
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__sync_synchronize(); \
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typeof(*ptr) rval = __sync_fetch_and_or(ptr, val); \
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__sync_synchronize(); \
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rval; \
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})
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#else /* !HAVE___ATOMIC && !HAVE_STDATOMIC_H */
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#error no atomic functions...
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10
lib/zebra.h
10
lib/zebra.h
@ -481,6 +481,16 @@ typedef enum {
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#define UNSET_FLAG(V,F) (V) &= ~(F)
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#define RESET_FLAG(V) (V) = 0
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/* Atomic flag manipulation macros. */
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#define CHECK_FLAG_ATOMIC(PV, F) \
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((atomic_load_explicit(PV, memory_order_seq_cst)) & (F))
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#define SET_FLAG_ATOMIC(PV, F) \
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((atomic_fetch_or_explicit(PV, (F), memory_order_seq_cst)))
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#define UNSET_FLAG_ATOMIC(PV, F) \
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((atomic_fetch_and_explicit(PV, ~(F), memory_order_seq_cst)))
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#define RESET_FLAG_ATOMIC(PV) \
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((atomic_store_explicit(PV, 0, memory_order_seq_cst)))
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/* Zebra types. Used in Zserv message header. */
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typedef u_int16_t zebra_size_t;
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typedef u_int16_t zebra_command_t;
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