0a6a1f1d05
This brings our tree to NetBSD 7.0, as found on -current on the 10-10-2015. This updates: - LLVM to 3.6.1 - GCC to GCC 5.1 - Replace minix/commands/zdump with usr.bin/zdump - external/bsd/libelf has moved to /external/bsd/elftoolchain/ - Import ctwm - Drop sprintf from libminc Change-Id: I149836ac18e9326be9353958bab9b266efb056f0
31 lines
784 B
C
31 lines
784 B
C
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#ifndef __has_builtin
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#define __has_builtin(x) 0
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#endif
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#ifndef __has_feature
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#define __has_feature(x) 0
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#endif
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/**
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* Swap macro that enforces a happens-before relationship with a corresponding
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* ATOMIC_LOAD.
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*/
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#if __has_builtin(__c11_atomic_exchange)
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#define ATOMIC_SWAP(addr, val)\
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__c11_atomic_exchange(reinterpret_cast<_Atomic(__typeof__(val))*>(addr), val, __ATOMIC_ACQ_REL)
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#elif __has_builtin(__sync_swap)
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#define ATOMIC_SWAP(addr, val)\
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__sync_swap(addr, val)
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#else
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#define ATOMIC_SWAP(addr, val)\
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__sync_lock_test_and_set(addr, val)
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#endif
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#if __has_builtin(__c11_atomic_load)
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#define ATOMIC_LOAD(addr)\
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__c11_atomic_load(reinterpret_cast<_Atomic(__typeof__(*addr))*>(addr), __ATOMIC_ACQUIRE)
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#else
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#define ATOMIC_LOAD(addr)\
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(__sync_synchronize(), *addr)
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#endif
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