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MemoryCard: Batch sector writes together 5 seconds at a time

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Reduces disk writes for SSDs (assuming the OS didn't just cache all the
writes), and limits OSD spam.

Fixes #146.
This commit is contained in:
Connor McLaughlin
2020-04-09 00:14:26 +10:00
parent 0a004361fc
commit 3c45603cb4
2 changed files with 50 additions and 13 deletions
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12
src/core/memory_card.h
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@ -7,6 +7,7 @@
#include <string_view>
class System;
class TimingEvent;
class MemoryCard final
{
@ -33,6 +34,13 @@ public:
void Format();
private:
enum : u32
{
// save in three seconds, that should be long enough for everything to finish writing
SAVE_DELAY_IN_SECONDS = 5,
SAVE_DELAY_IN_SYSCLK_TICKS = MASTER_CLOCK * SAVE_DELAY_IN_SECONDS,
};
union FLAG
{
u8 bits;
@ -76,9 +84,11 @@ private:
u8* GetSectorPtr(u32 sector);
bool LoadFromFile();
bool SaveToFile();
bool SaveIfChanged(bool display_osd_message);
void QueueFileSave();
System* m_system;
std::unique_ptr<TimingEvent> m_save_event;
State m_state = State::Idle;
u16 m_address = 0;