> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# PFMultiplayerFreeMemoryCallback

> 每次 PlayFab Multiplayer 程式庫不再需要先前配置的記憶體緩衝區且可將其釋放時叫用的回呼。

每次 PlayFab Multiplayer 程式庫不再需要先前配置的記憶體緩衝區且可將其釋放時叫用的回呼。

## 語法

```cpp theme={null}
typedef
void (*PFMultiplayerFreeMemoryCallback)(  
    void* pointer,  
    uint32_t memoryTypeId  
)  
```

### 參數

**`pointer`**   void\*\
**Post\_invalid**

指向先前配置之記憶體緩衝區的指標。此值永遠不會是 nullptr。

**`memoryTypeId`**   uint32\_t

代表所釋放記憶體之 PlayFab Multiplayer 程式庫內部類別的不透明識別碼。應忽略此值。

### 傳回值

類型：void

此回呼不會傳回值。

## 備註

此回呼可選擇性地使用 [PFMultiplayerSetMemoryCallbacks()](https://docs.xbox.com/zh-TW/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/functions/pfmultiplayersetmemorycallbacks.md) 方法安裝。\
\
 每當 PlayFab Multiplayer 程式庫使用完先前由遊戲對應的 [PFMultiplayerAllocateMemoryCallback](https://docs.xbox.com/zh-TW/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/callbacks/pfmultiplayerallocatememorycallback.md) 所傳回的記憶體緩衝區時，就會叫用此回呼，讓遊戲可以釋放該記憶體緩衝區。

## 需求

**標頭：** PFMultiplayer.h

## 另請參閱

[PFMultiplayer 成員](https://docs.xbox.com/zh-TW/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/pfmultiplayer_members.md)\
[PFMultiplayerAllocateMemoryCallback](https://docs.xbox.com/zh-TW/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/callbacks/pfmultiplayerallocatememorycallback.md)\
[PFMultiplayerSetMemoryCallbacks](https://docs.xbox.com/zh-TW/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/functions/pfmultiplayersetmemorycallbacks.md)


## Related topics

- [PFMultiplayerAllocateMemoryCallback](https://docs.xbox.com/zh-TW/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/callbacks/pfmultiplayerallocatememorycallback.md)
- [PFMultiplayerSetMemoryCallbacks](https://docs.xbox.com/zh-TW/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/functions/pfmultiplayersetmemorycallbacks.md)
- [game_chat_free_memory_callback](https://docs.xbox.com/zh-TW/reference/chat/gamechat2/functions/game_chat_free_memory_callback.md)
- [PartyFreeMemoryCallback](https://docs.xbox.com/zh-TW/services/playfab/multiplayer/networking/reference/callbacks/partyfreememorycallback.md)
- [get_memory_callbacks](https://docs.xbox.com/zh-TW/reference/chat/gamechat2/classes/chat_manager/methods/chat_manager_get_memory_callbacks.md)