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Merge pull request #2302 from jbrianceau/generic-gcc-atomics-strong-cmpxchg

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generic atomicops: Use strong compare_exchange
This commit is contained in:
Jisi Liu 2016-11-02 15:03:19 -07:00 • committed by GitHub
commit 93a4fa23d0
1 changed files with 5 additions and 5 deletions
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10
src/google/protobuf/stubs/atomicops_internals_generic_gcc.h
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@ -38,7 +38,7 @@ namespace internal {
inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value,
Atomic32 new_value) {
__atomic_compare_exchange_n(ptr, &old_value, new_value, true,
__atomic_compare_exchange_n(ptr, &old_value, new_value, false,
__ATOMIC_RELAXED, __ATOMIC_RELAXED);
return old_value;
}
@ -61,7 +61,7 @@ inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value,
Atomic32 new_value) {
__atomic_compare_exchange_n(ptr, &old_value, new_value, true,
__atomic_compare_exchange_n(ptr, &old_value, new_value, false,
__ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
return old_value;
}
@ -69,7 +69,7 @@ inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value,
Atomic32 new_value) {
__atomic_compare_exchange_n(ptr, &old_value, new_value, true,
__atomic_compare_exchange_n(ptr, &old_value, new_value, false,
__ATOMIC_RELEASE, __ATOMIC_ACQUIRE);
return old_value;
}
@ -115,7 +115,7 @@ inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
Atomic64 old_value,
Atomic64 new_value) {
__atomic_compare_exchange_n(ptr, &old_value, new_value, true,
__atomic_compare_exchange_n(ptr, &old_value, new_value, false,
__ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
return old_value;
}
@ -123,7 +123,7 @@ inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
Atomic64 old_value,
Atomic64 new_value) {
__atomic_compare_exchange_n(ptr, &old_value, new_value, true,
__atomic_compare_exchange_n(ptr, &old_value, new_value, false,
__ATOMIC_RELAXED, __ATOMIC_RELAXED);
return old_value;
}