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DeviceMemory: Make counter types configurable

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This commit is contained in:
Fernando Sahmkow
2024-01-30 20:14:06 +01:00
parent aaab11e36f
commit 738e9a79a0
2 changed files with 19 additions and 14 deletions
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15
src/core/device_memory_manager.h
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@ -5,6 +5,7 @@
#include <array>
#include <atomic>
#include <bit>
#include <deque>
#include <memory>
#include <mutex>
@ -181,24 +182,28 @@ private:
}
Common::VirtualBuffer<VAddr> cpu_backing_address;
static constexpr size_t subentries = 8 / sizeof(u8);
using CounterType = u8;
using CounterAtomicType = std::atomic_uint8_t;
static constexpr size_t subentries = 8 / sizeof(CounterType);
static constexpr size_t subentries_mask = subentries - 1;
static constexpr size_t subentries_shift =
std::countr_zero(sizeof(u64)) - std::countr_zero(sizeof(CounterType));
class CounterEntry final {
public:
CounterEntry() = default;
std::atomic_uint8_t& Count(std::size_t page) {
CounterAtomicType& Count(std::size_t page) {
return values[page & subentries_mask];
}
const std::atomic_uint8_t& Count(std::size_t page) const {
const CounterAtomicType& Count(std::size_t page) const {
return values[page & subentries_mask];
}
private:
std::array<std::atomic_uint8_t, subentries> values{};
std::array<CounterAtomicType, subentries> values{};
};
static_assert(sizeof(CounterEntry) == subentries * sizeof(u8),
static_assert(sizeof(CounterEntry) == subentries * sizeof(CounterType),
"CounterEntry should be 8 bytes!");
static constexpr size_t num_counter_entries =