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thread_local.cc: Reset: use exchange instead of load+store

This commit is contained in:
leipeng 2022-06-22 18:05:23 +08:00
parent 446cebde3a
commit f1874abfba
1 changed files with 1 additions and 2 deletions
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3
util/thread_local.cc
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@ -392,7 +392,7 @@ void ThreadLocalPtr::StaticMeta::Reset(uint32_t id, void* ptr) {
MutexLock l(Mutex()); MutexLock l(Mutex());
tls->entries.resize(id + 1); tls->entries.resize(id + 1);
} }
void* oldptr = tls->entries[id].ptr.load(std::memory_order_acquire); void* oldptr = tls->entries[id].ptr.exchange(ptr, std::memory_order_acq_rel);
if (UNLIKELY(nullptr != oldptr && ptr != oldptr)) { if (UNLIKELY(nullptr != oldptr && ptr != oldptr)) {
auto inst = Instance(); auto inst = Instance();
MutexLock l(inst->MemberMutex()); MutexLock l(inst->MemberMutex());
@ -400,7 +400,6 @@ void ThreadLocalPtr::StaticMeta::Reset(uint32_t id, void* ptr) {
handler(oldptr); handler(oldptr);
} }
} }
tls->entries[id].ptr.store(ptr, std::memory_order_release);
} }
void* ThreadLocalPtr::StaticMeta::Swap(uint32_t id, void* ptr) { void* ThreadLocalPtr::StaticMeta::Swap(uint32_t id, void* ptr) {