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Cut-over to inline assembly to tame the optimizer

pull/35/head
Jeffrey Walton 2015-07-31 10:05:14 -04:00
parent 79ec88f5a6
commit 5f2c32af37
1 changed files with 7 additions and 10 deletions
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17
smartptr.h
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@ -45,21 +45,18 @@ private:
void operator=(const simple_ptr<T>& rhs); // assignment not allowed
};
#if GCC_OPTIMIZE_AWARE
# pragma GCC push_options
# pragma GCC optimize ("-O0")
#endif
// set m_p to NULL so double destruction (which might occur in Singleton) will be harmless
// Set m_p to NULL so double destruction (which might occur in Singleton) will be harmless
template <class T> simple_ptr<T>::~simple_ptr()
{
delete m_p;
m_p = NULL;
}
#if GCC_OPTIMIZE_AWARE
# pragma GCC pop_options
#ifdef __GNUC__
// From Andrew Haley (GCC Dev), to tame the optimizer so the assignment is always performed.
// See "Disable optimizations in one function" on the GCC mailing list.
asm volatile ("" : : : "memory");
#endif
}
template <class T> class member_ptr
{