C26160

警告 C26160: 呼叫端在呼叫函式<func>之前無法維持鎖定 <lock> 。

警告 C26160 類似 C26110 警告，除了確定較低。例如，函式可能包含附註錯誤。

範例

下列程式碼會產生警告 C26160。

struct Account
{
    _Guarded_by_(cs) int balance;
    CRITICAL_SECTION cs;

    _No_competing_thread_ void Init() 
    {
        balance = 0; // OK
    }

    _Requires_lock_held_(this->cs) void FuncNeedsLock();

    _No_competing_thread_ void FuncInitCallOk()
        // this annotation requires this function is called 
        // single-threaded, therefore we don't need to worry 
        // about the lock
    {
        FuncNeedsLock(); // OK, single threaded
    } 

    void FuncInitCallBad() // No annotation provided, analyzer generates warning
    {
        FuncNeedsLock(); // Warning C26160
    }

};

下列程式碼顯示前述範例的解決方案。

struct Account
{
    _Guarded_by_(cs) int balance;
    CRITICAL_SECTION cs;

    _No_competing_thread_ void Init()
    {
        balance = 0; // OK
    }

    _Requires_lock_held_(this->cs) void FuncNeedsLock();

    _No_competing_thread_ void FuncInitCallOk()
        // this annotation requires this function is called 
        // single-threaded, therefore we don't need to worry 
        // about the lock
    {
        FuncNeedsLock(); // OK, single threaded
    } 

    void FuncInitCallBadFixed() // this function now properly acquires (and releases) the lock
    {
        EnterCriticalSection(&this->cs); 
        FuncNeedsLock();  
        LeaveCriticalSection(&this->cs);
    }
};