S60: cleanup stack

最新推荐文章于 2019-11-09 11:50:45 发布

最新推荐文章于 2019-11-09 11:50:45 发布 · 62 阅读

本文介绍了在C++中如何安全地管理堆内存，包括使用局部指针时如何确保内存被正确释放，以及作为类成员变量时如何避免内存泄漏。通过具体的代码示例展示了不同情况下内存管理的最佳实践。

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如果是局部指针的话，需要这样（否则heap内的内存无法回收）：

void SafeFunctionL() { CAnotherClass* theObject = new (ELeave) CAnotherClass(); // Push to the cleanup stack before calling // any methods that may leave. CleanupStack::PushL(theObject); // If leave happens here, theObject will still be // deleted. theObject ->InitializeL(); // Pop the object from the cleanup stack. CleanupStack::Pop(theObject); // And finally delete the object. delete theObject; // Alternatively, the last 2 lines of code can // be expressed in one line, as follows: // CleanupStack::PopAndDestroy(theObject); }

而如果是类的成员变量，则可以放心大胆地如下：

void CTestClass::SafeFunctionL() { // Heap allocation of a member variable iTheObject = new(ELeave) CAnotherClass(); iTheObject ->InitializeL(); // Safe for iTheObject }