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add first_multiple helper function

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This commit is contained in:
Gael Guennebaud 2012-10-30 16:27:52 +01:00
parent 90fcaf11cf
commit aa858cb43a
1 changed files with 7 additions and 0 deletions
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7
Eigen/src/Core/util/Memory.h
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@ -470,6 +470,13 @@ static inline Index first_aligned(const Scalar* array, Index size)
} }
} }
/** \internal Returns the smallest integer multiple of \a base and greater or equal to \a size
*/
template<typename Index>
inline static Index first_multiple(Index size, Index base)
{
return ((size+base-1)/base)*base;
}
// std::copy is much slower than memcpy, so let's introduce a smart_copy which // std::copy is much slower than memcpy, so let's introduce a smart_copy which
// use memcpy on trivial types, i.e., on types that does not require an initialization ctor. // use memcpy on trivial types, i.e., on types that does not require an initialization ctor.