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c++ Programming Glossary: memory_order_acquireWhat do each memory_order mean? http://stackoverflow.com/questions/12346487/what-do-each-memory-order-mean means this thread pushes out changes of x and obviously y memory_order_acquire Syncs reading this atomic variable AND makes sure relaxed vars.. threads for other shared memory data. The third mode memory_order_acquire memory_order_release is a hybrid between the other two. The..
Does the semantics of `std::memory_order_acquire` requires processor instructions on x86/x86_64? http://stackoverflow.com/questions/18576986/does-the-semantics-of-stdmemory-order-acquire-requires-processor-instruction the semantics of `std memory_order_acquire` requires processor instructions on x86 x86_64 It is known.. load and store memory barriers memory_order_consume memory_order_acquire memory_order_release memory_order_acq_rel does not require a.. load MSVS2012 x86_64 using lock cmpxchg int val a.load std memory_order_acquire 000000013F931A1D prefetchw a 000000013F931A22 mov eax dword..
Double-Checked Lock Singleton in C++11 http://stackoverflow.com/questions/6086912/double-checked-lock-singleton-in-c11 lock_guard std mutex lock m_mutex if m_instance.load std memory_order_acquire Tp i new Tp m_instance.store i std memory_order_release return.. Tp instance if instance instance m_instance.load std memory_order_acquire std lock_guard std mutex lock m_mutex if instance m_instance.load..
http://stackoverflow.com/questions/6319146/c11-introduced-a-standardized-memory-model-what-does-it-mean-and-how-is-it-g 1 Thread 2 x.store 17 memory_order_release cout y.load memory_order_acquire y.store 37 memory_order_release cout x.load memory_order_acquire.. y.store 37 memory_order_release cout x.load memory_order_acquire endl This takes us back to the ordered loads and stores so 37..
Memory model ordering and visibility? http://stackoverflow.com/questions/7461484/memory-model-ordering-and-visibility question If you like to deal with fences then a.load memory_order_acquire is equivalent to a.load memory_order_relaxed followed by atomic_thread_fence.. memory_order_relaxed followed by atomic_thread_fence memory_order_acquire . Similarly a.store x memory_order_release is equivalent to.. . memory_order_consume is a special case of memory_order_acquire for dependent data only . memory_order_seq_cst is special and..
How to use std::atomic efficiently http://stackoverflow.com/questions/8749038/how-to-use-stdatomic-efficiently x86 x64 with a std atomic unsigned variable a a.load std memory_order_acquire and a.store new_value std memory_order_release are no more expensive..
Concurrency: Atomic and volatile in C++11 memory model http://stackoverflow.com/questions/8819095/concurrency-atomic-and-volatile-in-c11-memory-model memory orderings such as std memory_order_relaxed or std memory_order_acquire then the constraints are relaxed even further and the single..
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