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Fix a potential bug of ParallelLoopBodyWrapper::operator(Range)

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On a 32-bit compiler the calculation may result in data (size_t) overflow when running some paralleled algorithms (which can safely run on a 64-bit compiler).
This bug is found when running OpenCV's Retina tutorial on 32bit VS2010.
This commit is contained in:
peng xiao 2013-08-23 15:35:55 +08:00
parent 7b95bb20f7
commit 2519a21935
1 changed files with 2 additions and 2 deletions
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4
modules/core/src/parallel.cpp
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@ -144,9 +144,9 @@ namespace
{
cv::Range r;
r.start = (int)(wholeRange.start +
((size_t)sr.start*(wholeRange.end - wholeRange.start) + nstripes/2)/nstripes);
((uint64)sr.start*(wholeRange.end - wholeRange.start) + nstripes/2)/nstripes);
r.end = sr.end >= nstripes ? wholeRange.end : (int)(wholeRange.start +
((size_t)sr.end*(wholeRange.end - wholeRange.start) + nstripes/2)/nstripes);
((uint64)sr.end*(wholeRange.end - wholeRange.start) + nstripes/2)/nstripes);
(*body)(r);
}
cv::Range stripeRange() const { return cv::Range(0, nstripes); }