65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2018 MerryMage
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* This software may be used and distributed according to the terms of the GNU
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* General Public License version 2 or any later version.
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*/
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#include <algorithm>
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#include <dynarmic/A64/exclusive_monitor.h>
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#include "common/assert.h"
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namespace Dynarmic {
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namespace A64 {
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ExclusiveMonitor::ExclusiveMonitor(size_t processor_count) : exclusive_addresses(processor_count, INVALID_EXCLUSIVE_ADDRESS) {
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Unlock();
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}
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size_t ExclusiveMonitor::GetProcessorCount() const {
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return exclusive_addresses.size();
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}
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void ExclusiveMonitor::Mark(size_t processor_id, VAddr address, size_t size) {
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ASSERT(size <= 16);
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const VAddr masked_address = address & RESERVATION_GRANULE_MASK;
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Lock();
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exclusive_addresses[processor_id] = masked_address;
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Unlock();
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}
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void ExclusiveMonitor::Lock() {
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while (is_locked.test_and_set(std::memory_order_acquire)) {}
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}
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void ExclusiveMonitor::Unlock() {
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is_locked.clear(std::memory_order_release);
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}
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bool ExclusiveMonitor::CheckAndClear(size_t processor_id, VAddr address, size_t size) {
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ASSERT(size <= 16);
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const VAddr masked_address = address & RESERVATION_GRANULE_MASK;
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Lock();
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if (exclusive_addresses[processor_id] != masked_address) {
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Unlock();
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return false;
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}
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for (VAddr& other_address : exclusive_addresses) {
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if (other_address == masked_address) {
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other_address = INVALID_EXCLUSIVE_ADDRESS;
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}
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}
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return true;
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}
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void ExclusiveMonitor::Clear() {
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Lock();
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std::fill(exclusive_addresses.begin(), exclusive_addresses.end(), INVALID_EXCLUSIVE_ADDRESS);
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Unlock();
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}
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} // namespace A64
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} // namespace Dynarmic
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