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Disk: ReadDriver: Add unified cache

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Previously, we had to copy an entire block out of the
old cache every time we wanted to read even a single
byte from it.

This ended up being a fairly significant performance
issue, in addition to the fact that the caching code
was duplicated.
This commit is contained in:
Paul Hollinsky
2022-04-14 18:26:44 -04:00
parent d45d708446
commit 103f938d69
10 changed files with 316 additions and 245 deletions
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include/icsneo/disk/extextractordiskreaddriver.h
-5
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@@ -24,13 +24,8 @@ public:
private:
static constexpr const uint32_t MaxSize = Disk::SectorSize * 512;
static constexpr const std::chrono::seconds CacheTime = std::chrono::seconds(1);
static constexpr const uint8_t HeaderLength = 7;
std::array<uint8_t, MaxSize> cache;
uint64_t cachePos = 0;
std::chrono::time_point<std::chrono::steady_clock> cachedAt;
Access getPossibleAccess() const override { return Access::EntireCard; }
optional<uint64_t> readLogicalDiskAligned(Communication& com, device_eventhandler_t report,