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I am having problem(segmentation fault) with the following code snippet:
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//create a pointer to the hitpoint
//loop over all the pixels in the image
#pragma omp parallel for schedule(dynamic,1), private(hitPoint)
for(int y = 0; y < height; ++y)
for(int x = 0; x < width; ++x)
hitPoint = traceAndCreateHitPoint(x,y);
//store the hit point inside the vector
#pragma omp critical
// Print progress approximately every 5%.
if ((y+1) % (height/20) == 0 || (y+1) == height)
std::cout << (100*(y+1)/height) << "% done" << std::endl;
Is there any issue that need to be resolved when using openmp with STL. If i comment the STL command , the code runs fine.
None of the STL containers are guaranteed safe to access using multiple threads in this way. You need to make sure only one thread at a time calls push_back(): putting the call in a critical section should work, though this may not be the most optimal solution.
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- Location: EPCC, University of Edinburgh
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