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fix bug #406: Using OpenMP and Eigen causes infinite loop/deadlock

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(transplanted from fd52daae87b7b1cc2618b12b4579a0eab5194d48
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This commit is contained in:
Gael Guennebaud 2012-01-25 17:42:22 +01:00
parent c68616b3b5
commit 606e204f6d
1 changed files with 7 additions and 10 deletions
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17
Eigen/src/Core/products/GeneralBlockPanelKernel.h
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@ -30,19 +30,16 @@ namespace internal {
template<typename _LhsScalar, typename _RhsScalar, bool _ConjLhs=false, bool _ConjRhs=false>
class gebp_traits;
std::ptrdiff_t manage_caching_sizes_second_if_negative(std::ptrdiff_t a, std::ptrdiff_t b)
{
return a<=0 ? b : a;
}
/** \internal */
inline void manage_caching_sizes(Action action, std::ptrdiff_t* l1=0, std::ptrdiff_t* l2=0)
{
static std::ptrdiff_t m_l1CacheSize = 0;
static std::ptrdiff_t m_l2CacheSize = 0;
if(m_l1CacheSize==0)
{
m_l1CacheSize = queryL1CacheSize();
m_l2CacheSize = queryTopLevelCacheSize();
if(m_l1CacheSize<=0) m_l1CacheSize = 8 * 1024;
if(m_l2CacheSize<=0) m_l2CacheSize = 1 * 1024 * 1024;
}
static std::ptrdiff_t m_l1CacheSize = manage_caching_sizes_second_if_negative(queryL1CacheSize(),8 * 1024);
static std::ptrdiff_t m_l2CacheSize = manage_caching_sizes_second_if_negative(queryTopLevelCacheSize(),1*1024*1024);
if(action==SetAction)
{