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Removed inline ASM for GCC. According to the GCC devs, the cast to volatile is all that's required

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This commit is contained in:
Jeffrey Walton 2015-08-03 14:01:31 -04:00
parent 69c6989e99
commit 8bfb29740f
1 changed files with 0 additions and 13 deletions
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13
smartptr.h
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@ -34,15 +34,6 @@ template <class T> simple_ptr<T>::~simple_ptr()
{ {
delete m_p; delete m_p;
*((volatile T**)(&m_p)) = 0; *((volatile T**)(&m_p)) = 0;
// Ensure the assignment is always performed. MSVC and Clang provide expected
// operational behavior for volatile. GCC has a more strict interpretation of
// the keyword (see http://www.airs.com/blog/archives/154), and volatile
// should not be used to tame the optimizer. However, inline assembly
// will tame it (see https://gcc.gnu.org/ml/gcc-help/2015-07/msg00053.html).
#ifdef __GNUC__
asm volatile ("" : : : "memory");
#endif
} }
template <class T> class member_ptr template <class T> class member_ptr
@ -66,10 +57,6 @@ public:
T *old_p = m_p; T *old_p = m_p;
*((volatile T**)(&m_p)) = 0; *((volatile T**)(&m_p)) = 0;
return old_p; return old_p;
#ifdef __GNUC__
asm volatile ("" : : : "memory");
#endif
} }
void reset(T *p = 0); void reset(T *p = 0);