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POopenMP conditional pragma "if else"
 

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    <p>I have a for loop that can be executed using <code>schedule(static)</code> or <code>schedule(dynamic, 10)</code> depending on a condition. Currently, My code is not DRY (Don't repeat yourself) enough and to accommodate the previous functionality it has the following repetition:</p> <pre><code>boolean isDynamic; //can be true or false if(isDynamic){ #pragma omp parallel for num_threads(thread_count) default(shared) private(...) schedule(dynamic, 10) for(...){ //for code inside } }else{ #pragma omp parallel for num_threads(thread_count) default(shared) private(...) schedule(static) for(...){ //SAME for code inside, in fact, this is the EXACT same for as before } } </code></pre> <p>After reading these threads, I noticed that openMP has an <code>#if(expression)</code> pragma:</p> <ul> <li><a href="https://stackoverflow.com/questions/7413331/openmp-conditional-use-of-pragma">OpenMP: conditional use of #pragma</a></li> <li><a href="http://msdn.microsoft.com/en-us/library/5187hzke.aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/5187hzke.aspx</a></li> <li><a href="https://stackoverflow.com/questions/9366466/choose-openmp-pragma-according-to-condition">Choose OpenMP pragma according to condition</a></li> <li><a href="https://stackoverflow.com/questions/4085595/conditional-pragma-omp">Conditional &quot;pragma omp&quot;</a></li> <li><a href="http://openmp.org/mp-documents/ntu-vanderpas.pdf" rel="nofollow noreferrer">http://openmp.org/mp-documents/ntu-vanderpas.pdf</a></li> </ul> <p>But although I've seen many people with my problem, there seems to be lacking a general solution. The best solution is to transform the body of the for loop into a function, and then have the function called, but this solution is not good enough for me. </p> <p>So I wonder, does OpenMP have an <code>#if(expression) else</code> sort of pragma? Something like:</p> <pre><code>#if(isDynamic )pragma omp parallel for num_threads(thread_count) default(shared) private(...) schedule(dynamic, 10) else pragma omp parallel for num_threads(thread_count) default(shared) private(...) schedule(static) </code></pre> <p>Or am I forced to place my for loop body into a separate function and call it that way?</p>
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