mirror of
https://gitee.com/openharmony/arkcompiler_ets_runtime
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104 lines
2.5 KiB
C++
104 lines
2.5 KiB
C++
/*
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* Copyright (c) 2024 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ecmascript/mutator_lock.h"
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#include "ecmascript/js_thread.h"
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namespace panda::ecmascript {
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#ifndef NDEBUG
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void MutatorLock::ReadLock()
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{
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ASSERT(!HasLock());
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RWLock::ReadLock();
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SetState(MutatorLockState::RDLOCK);
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}
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void MutatorLock::WriteLock()
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{
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ASSERT(!HasLock());
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RWLock::WriteLock();
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SetState(MutatorLockState::WRLOCK);
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}
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bool MutatorLock::TryReadLock()
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{
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ASSERT(!HasLock());
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bool res = RWLock::TryReadLock();
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if (res) {
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SetState(MutatorLockState::RDLOCK);
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}
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return res;
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}
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bool MutatorLock::TryWriteLock()
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{
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ASSERT(!HasLock());
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bool res = RWLock::TryWriteLock();
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if (res) {
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SetState(MutatorLockState::WRLOCK);
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}
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return res;
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}
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void MutatorLock::Unlock()
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{
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ASSERT(HasLock());
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RWLock::Unlock();
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SetState(MutatorLockState::UNLOCKED);
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}
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bool MutatorLock::HasLock() const
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{
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return GetState() != MutatorLockState::UNLOCKED;
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}
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MutatorLock::MutatorLockState MutatorLock::GetState() const
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{
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return JSThread::GetCurrent()->GetMutatorLockState();
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}
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void MutatorLock::SetState(MutatorLock::MutatorLockState newState)
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{
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JSThread::GetCurrent()->SetMutatorLockState(newState);
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}
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#endif
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void SuspendBarrier::Wait()
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{
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while (true) {
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int32_t curCount = passBarrierCount_.load(std::memory_order_relaxed);
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if (LIKELY(curCount > 0)) {
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#if defined(PANDA_TARGET_OHOS)
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sched_yield();
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#endif
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} else {
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// Use seq_cst to synchronize memory.
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curCount = passBarrierCount_.load(std::memory_order_seq_cst);
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ASSERT(curCount == 0);
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break;
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}
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}
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}
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void SuspendBarrier::PassCount(int32_t delta)
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{
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bool done = false;
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do {
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int32_t curCount = passBarrierCount_.load(std::memory_order_relaxed);
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// Reduce value by 1.
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done = passBarrierCount_.compare_exchange_strong(curCount, curCount + delta);
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} while (!done);
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}
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} // namespace panda::ecmascript
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