In your class (e.g., CSteamIntegration ), you need a persistent CCallResult object. Do not declare this on the stack inside a function; if the object is destroyed, the callback will fail or crash your application.
This article provides an in-depth exploration of how to use RegisterCallResult , the difference between Call Results and Callbacks, and best practices to ensure your integration is stable and bug-free. Before diving into syntax, it is crucial to understand why this mechanism exists. If you call ISteamUserStats::RequestCurrentStats() , the request goes to the Steam backend. This takes time (latency). If the game waited for the answer on the same line of code (a synchronous call), your game would freeze until the server replied.
For C++ developers, the specific keyword phrase refers to one of the two primary methods for handling these responses: the CCallResult template class and the RegisterCallResult method.
When developing a game or application that integrates with the Steam ecosystem via the Steamworks SDK, one of the most fundamental concepts to master is the Asynchronous Call. Steam operations—whether checking achievements, listing lobbies, or writing to cloud storage—do not happen instantly. To handle these delayed responses without freezing your game, the SDK provides a robust callback mechanism.
// Template Arguments CCallResult< MyClassName, CallbackStructType > m_CallResult; // The Setup void Init() { SteamAPICall_t hCall = SteamAPICall(); // The function you are calling m_CallResult.Set( hCall, this, &MyClassName::OnResult ); }
class CSteamIntegration { private: // This object manages the link between the call and the function CCallResult<CSteamIntegration, UserStatsReceived_t> m_CallbackUserStatsReceived; public: void RequestStats(); void OnUserStatsReceived(UserStatsReceived_t *pCallback, bool bIOFailure); };
Call the Steam API function and pass the returned handle to your `CCall
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