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LibretroAdmin
f7d5095739
Every std::mutex, lock_guard, unique_lock, scoped_lock, condition_variable, call_once and semaphore left in Source/Core is replaced by a lock-free design: - Input: the device list, control bindings, stick calibration and default device are published snapshots read under a quiesce; a rebind requested while another thread is rebinding is handed to that thread instead of waited for. - WiimoteReal: the pool thread owns the slots and runs commands from an MPSC queue; the active Wiimotes are atomic slots. - EXI/SI/IOS devices: socket and packet traffic goes through SPSC rings or MPSC handoffs owned by one thread; USB scanning publishes its device list, and libusb transfers drain through a CallGate. - Memory cards: the flush thread applies change records queued by the CPU thread. - Custom assets: loads are scheduled as a published batch with an atomic cursor, results come back over an MPSC stack, and busy assets are skipped and retried. - D3D state and GL program caches use insert-only atomic maps (Common/AtomicHashMap.h). - Logging appends with O_APPEND / FILE_APPEND_DATA; FatFs reports busy instead of waiting; per-socket WSAStartup/WSACleanup. Deleted as unused by the libretro core: the profiler, the FIFO recorder, the volume verifier, the touch InputOverrider and the GameCube adapter's libusb path.
109 lines
2.8 KiB
C++
109 lines
2.8 KiB
C++
// Copyright 2022 DolphiniOS Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "Common/JITMemoryTracker.h"
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#include "Common/CommonTypes.h"
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#include "Common/MemoryUtil.h"
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#include "Common/MsgHandler.h"
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namespace Common
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{
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JITMemoryTracker::JITMemoryTracker() = default;
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JITMemoryTracker::~JITMemoryTracker()
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{
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for (auto& slot : m_jit_regions)
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delete static_cast<JITRegionInfo*>(retro_atomic_exchange_ptr(&slot, nullptr));
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quiesce_deinit(&m_quiesce);
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}
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void JITMemoryTracker::FreeRegion(quiesce_node_t* node)
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{
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delete reinterpret_cast<JITRegionInfo*>(node);
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}
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void JITMemoryTracker::RegisterJITRegion(void* ptr, size_t size)
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{
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quiesce_enter(&m_quiesce);
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const bool known = FindRegion(ptr) != nullptr;
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quiesce_exit(&m_quiesce);
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if (known)
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{
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PanicAlertFmt("JITMemoryTracker: region {} already registered", ptr);
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return;
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}
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auto* info = new JITRegionInfo{{}, ptr, size, 0};
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for (auto& slot : m_jit_regions)
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{
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if (!retro_atomic_load_acquire_ptr(&slot) && retro_atomic_cas_ptr(&slot, nullptr, info))
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return;
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}
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PanicAlertFmt("JITMemoryTracker: more than {} JIT regions", MAX_REGIONS);
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delete info;
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}
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void JITMemoryTracker::UnregisterJITRegion(void* ptr)
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{
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for (auto& slot : m_jit_regions)
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{
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auto* info = static_cast<JITRegionInfo*>(retro_atomic_load_acquire_ptr(&slot));
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if (info && info->start_ptr == ptr && retro_atomic_cas_ptr(&slot, info, nullptr))
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{
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quiesce_retire(&m_quiesce, &info->node, FreeRegion);
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return;
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}
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}
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}
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JITMemoryTracker::JITRegionInfo* JITMemoryTracker::FindRegion(void* ptr)
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{
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JITRegionInfo* containing = nullptr;
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for (auto& slot : m_jit_regions)
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{
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auto* info = static_cast<JITRegionInfo*>(retro_atomic_load_acquire_ptr(&slot));
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if (!info)
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continue;
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if (info->start_ptr == ptr)
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return info;
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void* region_end = static_cast<void*>(static_cast<u8*>(info->start_ptr) + info->size);
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if (!containing && ptr >= info->start_ptr && ptr <= region_end)
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containing = info;
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}
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return containing;
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}
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void JITMemoryTracker::JITRegionWriteEnableExecuteDisable(void* ptr)
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{
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quiesce_enter(&m_quiesce);
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JITRegionInfo* info = FindRegion(ptr);
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if (info)
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{
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if (info->nest_counter == 0)
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UnWriteProtectMemory(info->start_ptr, info->size, false);
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info->nest_counter++;
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}
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quiesce_exit(&m_quiesce);
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}
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void JITMemoryTracker::JITRegionWriteDisableExecuteEnable(void* ptr)
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{
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quiesce_enter(&m_quiesce);
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JITRegionInfo* info = FindRegion(ptr);
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if (info)
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{
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info->nest_counter--;
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if (info->nest_counter < 0)
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PanicAlertFmt("JITMemoryTracker: Nest counter underflow for region {}", ptr);
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else if (info->nest_counter == 0)
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WriteProtectMemory(info->start_ptr, info->size, true);
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}
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quiesce_exit(&m_quiesce);
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}
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} // namespace Common
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