System: Prevent memcard blocking resume state save

Because otherwise you end up with a stale/old resume state, which is
arguably worse.

src/core/fullscreen_ui.cpp

@@ -6535,7 +6535,7 @@ void FullscreenUI::DoSaveState(s32 slot, bool global)
     std::string filename(global ? System::GetGlobalSaveStateFileName(slot) :
                                   System::GetGameSaveStateFileName(System::GetGameSerial(), slot));
     Error error;
-    if (!System::SaveState(filename.c_str(), &error, g_settings.create_save_state_backups))
+    if (!System::SaveState(filename.c_str(), &error, g_settings.create_save_state_backups, false))
     {
       ShowToast(std::string(), fmt::format(TRANSLATE_FS("System", "Failed to save state: {}"), error.GetDescription()));
     }

src/core/hotkeys.cpp

@@ -111,7 +111,7 @@ static void HotkeySaveStateSlot(bool global, s32 slot)
   std::string path(global ? System::GetGlobalSaveStateFileName(slot) :
                             System::GetGameSaveStateFileName(System::GetGameSerial(), slot));
   Error error;
-  if (!System::SaveState(path.c_str(), &error, g_settings.create_save_state_backups))
+  if (!System::SaveState(path.c_str(), &error, g_settings.create_save_state_backups, false))
   {
     Host::AddIconOSDMessage(
       "SaveState", ICON_FA_EXCLAMATION_TRIANGLE,

src/core/imgui_overlays.cpp

@@ -1277,7 +1277,7 @@ void SaveStateSelectorUI::SaveCurrentSlot()
   if (std::string path = GetCurrentSlotPath(); !path.empty())
   {
     Error error;
-    if (!System::SaveState(path.c_str(), &error, g_settings.create_save_state_backups))
+    if (!System::SaveState(path.c_str(), &error, g_settings.create_save_state_backups, false))
     {
       Host::AddIconOSDMessage("SaveState", ICON_EMOJI_WARNING,
                               fmt::format(TRANSLATE_FS("OSDMessage", "Failed to save state to slot {0}:\n{1}"),

src/core/system.cpp

@@ -1664,7 +1664,7 @@ bool System::SaveResumeState(Error* error)
   }
 
   const std::string path(GetGameSaveStateFileName(s_state.running_game_serial, -1));
-  return SaveState(path.c_str(), error, false);
+  return SaveState(path.c_str(), error, false, true);
 }
 
 bool System::BootSystem(SystemBootParameters parameters, Error* error)
@@ -3010,14 +3010,14 @@ bool System::ReadAndDecompressStateData(std::FILE* fp, std::span<u8> dst, u32 fi
   }
 }
 
-bool System::SaveState(const char* path, Error* error, bool backup_existing_save)
+bool System::SaveState(const char* path, Error* error, bool backup_existing_save, bool ignore_memcard_busy)
 {
   if (!IsValid() || IsReplayingGPUDump())
   {
     Error::SetStringView(error, TRANSLATE_SV("System", "System is not in correct state."));
     return false;
   }
-  else if (IsSavingMemoryCards())
+  else if (!ignore_memcard_busy && IsSavingMemoryCards())
   {
     Error::SetStringView(error, TRANSLATE_SV("System", "Cannot save state while memory card is being saved."));
     return false;

src/core/system.h

@@ -256,7 +256,7 @@ void ResetSystem();
 
 /// Loads state from the specified path.
 bool LoadState(const char* path, Error* error, bool save_undo_state);
-bool SaveState(const char* path, Error* error, bool backup_existing_save);
+bool SaveState(const char* path, Error* error, bool backup_existing_save, bool ignore_memcard_busy);
 bool SaveResumeState(Error* error);
 
 /// Runs the VM until the CPU execution is canceled.

src/duckstation-qt/qthost.cpp

@@ -1412,7 +1412,7 @@ void EmuThread::saveState(const QString& filename, bool block_until_done /* = fa
     return;
 
   Error error;
-  if (!System::SaveState(filename.toUtf8().data(), &error, g_settings.create_save_state_backups))
+  if (!System::SaveState(filename.toUtf8().data(), &error, g_settings.create_save_state_backups, false))
     emit errorReported(tr("Error"), tr("Failed to save state: %1").arg(QString::fromStdString(error.GetDescription())));
 }
 
@@ -1432,7 +1432,7 @@ void EmuThread::saveState(bool global, qint32 slot, bool block_until_done /* = f
   if (!System::SaveState((global ? System::GetGlobalSaveStateFileName(slot) :
                                    System::GetGameSaveStateFileName(System::GetGameSerial(), slot))
                            .c_str(),
-                         &error, g_settings.create_save_state_backups))
+                         &error, g_settings.create_save_state_backups, false))
   {
     emit errorReported(tr("Error"), tr("Failed to save state: %1").arg(QString::fromStdString(error.GetDescription())));
   }