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POWhy am I having memory leaks?
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  1. POWhy am I having memory leaks?
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    copied!<p>I'm using VLD to detect memory leaks in a game I'm writing in C++. It reported no leaks at all until very recently. I have a SettingsManager class (all static methods) which loads settings and can save them (file I/O). Here's how I would load a list of "key=value" settings into a vector:</p> <pre><code>std::vector&lt;Setting*&gt; settings; SettingsManager::loadFromFile(settingsLocation + "display" + settingsExtension, settings); </code></pre> <p>This vector is correctly filled and I can further process the data. The loadFromFile() method is implemented as follows:</p> <pre><code>std::ifstream file; file.open(filename); if(file.is_open()) { std::string line; unsigned pos; while(file.good()) { Setting* s = new Setting; getline(file, line); if(line.empty()) { // do not read empty lines continue; } // parse to Setting pos = line.find('='); s-&gt;key = line.substr(0, pos); s-&gt;value = line.substr(pos + 1); // add to vector settings.push_back(s); } file.close(); return true; } else { return false; } </code></pre> <p>So, this allocates Settings (which is a simple struct with two std::string variables). I delete them from where I call the loadFromFile method with the following method call:</p> <pre><code>SettingsManager::deleteSettings(settings); </code></pre> <p>which is implemented as follows:</p> <pre><code>void SettingsManager::deleteSettings(std::vector&lt;Setting*&gt;&amp; settings) { for(std::vector&lt;Setting*&gt;::iterator it = settings.begin(); it != settings.end(); ++it) { delete (*it); } } </code></pre> <p>When I debug, after the deleteSettings call all the elements in the vector are Bad Ptr's (Visual Studio 2010 Express). If I assign NULL to *it after the delete statement they are all NULL. So I really see no reason why this is giving me memory leaks.</p> <p>Anyone have an idea? Thanks!</p>
 

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