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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <unordered_map>
#include <boost/icl/interval_map.hpp>
#include <boost/range/iterator_range.hpp>
#include "common/common_types.h"
#include "core/memory.h"
#include "video_core/memory_manager.h"
template <class T>
class RasterizerCache : NonCopyable {
public:
/// Mark the specified region as being invalidated
void InvalidateRegion(Tegra::GPUVAddr region_addr, size_t region_size) {
for (auto iter = cached_objects.cbegin(); iter != cached_objects.cend();) {
const auto& object{iter->second};
++iter;
if (object->GetAddr() <= (region_addr + region_size) &&
region_addr <= (object->GetAddr() + object->GetSizeInBytes())) {
// Regions overlap, so invalidate
Unregister(object);
}
}
}
protected:
/// Tries to get an object from the cache with the specified address
T TryGet(Tegra::GPUVAddr addr) const {
const auto& search{cached_objects.find(addr)};
if (search != cached_objects.end()) {
return search->second;
}
return nullptr;
}
/// Gets a reference to the cache
const std::unordered_map<Tegra::GPUVAddr, T>& GetCache() const {
return cached_objects;
}
/// Register an object into the cache
void Register(const T& object) {
const auto& search{cached_objects.find(object->GetAddr())};
if (search != cached_objects.end()) {
// Registered already
return;
}
cached_objects[object->GetAddr()] = object;
UpdatePagesCachedCount(object->GetAddr(), object->GetSizeInBytes(), 1);
}
/// Unregisters an object from the cache
void Unregister(const T& object) {
const auto& search{cached_objects.find(object->GetAddr())};
if (search == cached_objects.end()) {
// Unregistered already
return;
}
UpdatePagesCachedCount(object->GetAddr(), object->GetSizeInBytes(), -1);
cached_objects.erase(search);
}
private:
using PageMap = boost::icl::interval_map<u64, int>;
template <typename Map, typename Interval>
constexpr auto RangeFromInterval(Map& map, const Interval& interval) {
return boost::make_iterator_range(map.equal_range(interval));
}
/// Increase/decrease the number of object in pages touching the specified region
void UpdatePagesCachedCount(Tegra::GPUVAddr addr, u64 size, int delta) {
const u64 page_start{addr >> Tegra::MemoryManager::PAGE_BITS};
const u64 page_end{(addr + size) >> Tegra::MemoryManager::PAGE_BITS};
// Interval maps will erase segments if count reaches 0, so if delta is negative we have to
// subtract after iterating
const auto pages_interval = PageMap::interval_type::right_open(page_start, page_end);
if (delta > 0)
cached_pages.add({pages_interval, delta});
for (const auto& pair : RangeFromInterval(cached_pages, pages_interval)) {
const auto interval = pair.first & pages_interval;
const int count = pair.second;
const Tegra::GPUVAddr interval_start_addr = boost::icl::first(interval)
<< Tegra::MemoryManager::PAGE_BITS;
const Tegra::GPUVAddr interval_end_addr = boost::icl::last_next(interval)
<< Tegra::MemoryManager::PAGE_BITS;
const u64 interval_size = interval_end_addr - interval_start_addr;
if (delta > 0 && count == delta)
Memory::RasterizerMarkRegionCached(interval_start_addr, interval_size, true);
else if (delta < 0 && count == -delta)
Memory::RasterizerMarkRegionCached(interval_start_addr, interval_size, false);
else
ASSERT(count >= 0);
}
if (delta < 0)
cached_pages.add({pages_interval, delta});
}
std::unordered_map<Tegra::GPUVAddr, T> cached_objects;
PageMap cached_pages;
};
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