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POC++ Vectors / Classes /Threading
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  1. POC++ Vectors / Classes /Threading
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    copied!<p>I'm Using Win7 / VS2008 (9) SDK 6/7.1</p> <p>i faced a problem in a code that i'm using<br> the mini version of the code as follows </p> <pre><code>class CONNECTION { int/std::string/bool vars; // just to make it simple CONNECTION ( int defaultvar ); CONNECTION ( const CONNECTION&amp; copycon ) ~CONNECTION ( ); DWORD static WINAPI staticstart( void *param ) //HACK to use createthread on classes { return ((CONNECTION *)param)-&gt;main); } // yea it works fine DWORD main(); }; </code></pre> <p>this class has no default constructor with a copy and a destructor all vars are copied fine and destructor leaves no memleaks, constructor is simple as assigning the paramters to a var .. all vars and code are omitted to make it simple and because they aren't the prob. </p> <pre><code>class main { std::vector&lt;CONNECTION&gt; con; int addcon( int defaultvarofcon ) { CONNECTION temp( defaultvar ); con.push_back( temp ); return con.size() - 1; } } </code></pre> <p>so far so good when i run a console test program that only have an include and this code</p> <pre><code>main mymainclass; mymainclass.addcon( 0 ); </code></pre> <p>program runs fine closes without errors<br> but when i add extra code like </p> <pre><code>main mymainclass; mymainclass.addcon( 0 ); mymainclass.addcon( 1 ); mymainclass.addcon( 2 ); </code></pre> <p>program crashes with access violation after checking my code twice i debugged it step by step on all threads i found out the main thread can read correct values of all vector class/elements in both main thread and worker thread ONLY if i'm using one element at the vector </p> <p>however if i'm using more than one like the second code all data on all elements on their own threads are inaccessible ( bad pointers ) . but on main thread they still correct and showing right values </p> <p>can any one please help me figure out what's wrong with this code ? </p>
 

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