添加 FSaveStructPtr 管理 SaveStruct

Source/AutoSave/Private/AutoSaveSubsystem.cpp

@@ -28,6 +28,18 @@ void UAutoSaveSubsystem::GetSaveStructInfosWithoutData(TArray<FSaveStructInfo>&
 	}
 }
 
+int32 UAutoSaveSubsystem::GetIdleThreadNum() const
+{
+	int32 Result = 0;
+
+	for (const TUniquePtr<FAsyncTask<FStructLoadOrSaveTask>>& Task : TaskThreads)
+	{
+		if (!Task) ++Result;
+	}
+
+	return Result;
+}
+
 FSaveStruct * UAutoSaveSubsystem::AddSaveStructRef(const FString& Filename, UScriptStruct * ScriptStruct, FSaveStructLoadDelegate OnLoaded)
 {
 	if (StructInfos.Contains(Filename))

Source/AutoSave/Public/AutoSaveSubsystem.h

@@ -57,6 +57,7 @@ class AUTOSAVE_API UAutoSaveSubsystem : public UGameInstanceSubsystem, public FT
 	GENERATED_BODY()
 
 	friend class UAutoSaveBlueprintLibrary;
+	template<typename SaveStructType> friend class FSaveStructPtr;
 
 public:
 
@@ -71,6 +72,9 @@ public:
 	UFUNCTION(BlueprintCallable, Category = "AutoSave")
 	void GetSaveStructInfosWithoutData(TArray<FSaveStructInfo>& OutSaveStructInfos) const;
 
+	UFUNCTION(BlueprintPure, Category = "AutoSave")
+	int32 GetIdleThreadNum() const;
+
 	FSaveStruct* AddSaveStructRef(const FString& Filename, UScriptStruct* ScriptStruct = nullptr, FSaveStructLoadDelegate OnLoaded = FSaveStructLoadDelegate());
 
 	void RemoveSaveStructRef(const FString& Filename);

Source/AutoSave/Public/SaveStruct.h

@@ -0,0 +1,79 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "AutoSaveSubsystem.h"
+#include "Templates/UnrealTemplate.h"
+
+struct FSaveStructInfo;
+
+class UAutoSaveSubsystem;
+
+template<typename SaveStructType>
+class FSaveStructPtr : public FNoncopyable
+{
+public:
+
+	FORCEINLINE FSaveStructPtr()
+		: AutoSaveSubsystem(nullptr)
+		, Info(nullptr)
+	{
+	}
+
+	FORCEINLINE FSaveStructPtr(UAutoSaveSubsystem* InAutoSaveSubsystem, const FString& Filename, FSaveStructLoadDelegate OnLoaded = FSaveStructLoadDelegate())
+		: AutoSaveSubsystem(InAutoSaveSubsystem)
+		, Info(nullptr)
+	{
+		if (AutoSaveSubsystem->AddSaveStructRef(Filename, SaveStructType::StaticStruct(), OnLoaded))
+		{
+			Info = AutoSaveSubsystem->StructInfos[Filename].Get();
+		}
+	}
+
+	FORCEINLINE ~FSaveStructPtr()
+	{
+		if (Info)
+		{
+			AutoSaveSubsystem->RemoveSaveStructRef(Info->Filename);
+		}
+	}
+
+	FORCEINLINE SaveStructType* Get() const
+	{
+		return Info ? (SaveStructType*)Info->Data.GetData() : nullptr;
+	}
+
+	FORCEINLINE explicit operator bool() const
+	{
+		return Info != nullptr;
+	}
+
+	FORCEINLINE const bool IsValid() const
+	{
+		return Info != nullptr;
+	}
+
+	FORCEINLINE const bool IsLoaded() const
+	{
+		check(IsValid());
+		return Info->State == ESaveStructState::Idle || Info->State == ESaveStructState::Saving;
+	}
+
+	FORCEINLINE SaveStructType& operator*() const
+	{
+		check(IsValid());
+		return *Get();
+	}
+
+	FORCEINLINE SaveStructType* operator->() const
+	{
+		check(IsValid());
+		return Get();
+	}
+
+private:
+
+	UAutoSaveSubsystem* AutoSaveSubsystem;
+
+	FSaveStructInfo* Info;
+
+};