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LRU Cache Refactor with Thread-Safety (#199)

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The cache is now thread-safe using std::shared_mutex, allowing concurrent reads without blocking and some other minor things to better maintenance

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/199
Co-authored-by: MrPurple666 <mrpurple666@noreply.localhost>
Co-committed-by: MrPurple666 <mrpurple666@noreply.localhost>
This commit is contained in:
MrPurple666 2025-06-21 19:32:32 +00:00 • committed by JPikachu
parent 2946cdbd2d
commit 2f01c69710
3 changed files with 179 additions and 106 deletions
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13
src/core/arm/nce/patcher.h
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@ -1,5 +1,5 @@
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2025 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
@ -15,6 +15,7 @@
#include "core/hle/kernel/k_typed_address.h"
#include "core/hle/kernel/physical_memory.h"
#include "lru_cache.h"
#include <utility>
namespace Core::NCE {
@ -30,6 +31,10 @@ using EntryTrampolines = std::unordered_map<ModuleTextAddress, PatchTextAddress>
class Patcher {
public:
Patcher(const Patcher&) = delete;
Patcher& operator=(const Patcher&) = delete;
Patcher(Patcher&& other) noexcept;
Patcher& operator=(Patcher&&) noexcept = delete;
explicit Patcher();
~Patcher();
@ -62,7 +67,7 @@ private:
void WriteCntpctHandler(ModuleDestLabel module_dest, oaknut::XReg dest_reg);
private:
static constexpr size_t CACHE_SIZE = 4096; // Cache size for patch entries
static constexpr size_t CACHE_SIZE = 16384; // Cache size for patch entries
LRUCache<uintptr_t, PatchTextAddress> patch_cache{CACHE_SIZE, Settings::values.lru_cache_enabled.GetValue()};
void BranchToPatch(uintptr_t module_dest) {
@ -70,7 +75,7 @@ private:
LOG_DEBUG(Core_ARM, "LRU cache lookup for address {:#x}", module_dest);
// Try to get existing patch entry from cache
if (auto* cached_patch = patch_cache.get(module_dest)) {
LOG_DEBUG(Core_ARM, "LRU cache hit for address {:#x}", module_dest);
LOG_WARNING(Core_ARM, "LRU cache hit for address {:#x}", module_dest);
curr_patch->m_branch_to_patch_relocations.push_back({c.offset(), *cached_patch});
return;
}