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POHow to dump unordered map while adding and erasing elements to it?
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2013-02-03T14:31:02.647
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I want to dump the keys of an unordered_map while being able to simultaneously add and erase elements. It takes 4 seconds to dump entirely, it's too long. Is it possible to dump in separate thread, like this: <pre><code>while (1) { pthread_mutex_lock( &mutex ); if(iter!=map.end()){ x=iter->first iter++; } pthread_mutex_unlock( &mutex ); do_this(x); // this takes time to complete } </code></pre> while in the main thread I have: <pre><code>pthread_mutex_lock( &mutex ); map.erase(iter); </code></pre> Does the erase method of unordered map make problem, since the iterator will be invalid after erasing. Is there any other safe way to dump in parallel?
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<c++><multithreading><unordered-map>
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How to dump unordered map while adding and erasing elements to it?
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