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c++ Programming Glossary: barriershttp://stackoverflow.com/questions/118199/c-thread-shared-data on your processor and ordering needs you may need memory barriers. volatile is enough to guarentee that the other processor will.. really show this phenomena. If you need and use memory barriers you should no longer need volatile Volatile considered harmful..
http://stackoverflow.com/questions/12878344/volatile-in-c11 from to x to be atomic nor does it require the memory barriers needed for non atomic reads writes to be properly ordered. volatile.. memory access among different cores. These memory barriers allow two threads to communicate effectively. Merely reading..
does presence of mutex help getting rid of volatile key word ? http://stackoverflow.com/questions/1616093/does-presence-of-mutex-help-getting-rid-of-volatile-key-word that are always confused. volatile threads locks memory barriers etc. volatile is used to tell the compiler to produce code to.. In general not to optimize or take 'short cuts'. memory barriers supplied by mutexes locks etc as quoted from Herb Sutter in..
Why is volatile not considered useful in multithreaded C or C++ programming? http://stackoverflow.com/questions/2484980/why-is-volatile-not-considered-useful-in-multithreaded-c-or-c-programming access may be reordered across this point . Placing such barriers around our volatile variable access ensures that even non volatile.. one allowing us to write thread safe code. However memory barriers also ensure that all pending reads writes are executed when..
What kinds of optimizations does 'volatile' prevent in C++? http://stackoverflow.com/questions/3604569/what-kinds-of-optimizations-does-volatile-prevent-in-c your program hasn't written to it and when no other memory barriers like mutexes as used for multi threaded programs are present...
Is 'volatile' needed in this multi-threaded C++ code? http://stackoverflow.com/questions/3612505/is-volatile-needed-in-this-multi-threaded-c-code userside. They will also contain the necessary memory barriers. Volatile should only be used for memory mapped IO where multiple..
What are the barriers to understanding pointers and what can be done to overcome them? http://stackoverflow.com/questions/5727/what-are-the-barriers-to-understanding-pointers-and-what-can-be-done-to-overcome are the barriers to understanding pointers and what can be done to overcome them..
http://stackoverflow.com/questions/6319146/c11-introduced-a-standardized-memory-model-what-does-it-mean-and-how-is-it-g the compiler is likely to emit full blown memory barriers between every access here. But if your algorithm can tolerate..
What will be the critical section code for a shared queue accessed by two threads? http://stackoverflow.com/questions/6839425/what-will-be-the-critical-section-code-for-a-shared-queue-accessed-by-two-thread of operations within a given thread. On x86 no memory barriers are required due to the strong memory consistency model for.. with weaker memory consistency models where memory barriers would be required queue_type pointer queue_type next_slot queue_type..
http://stackoverflow.com/questions/6866206/volatile-and-createthread don't. Most of the time what people really want are barriers also called fences and atomic instructions which are all compiler.. than you really wanted. It's not realistic. So we use barriers. They allow full optimization and only guarantee that the memory..
Memory model ordering and visibility? http://stackoverflow.com/questions/7461484/memory-model-ordering-and-visibility 42 1234 random idx in array c c 11 mutex atomic memory barriers share improve this question If you like to deal with fences..
C++ Memory Barriers for Atomics http://stackoverflow.com/questions/8841738/c-memory-barriers-for-atomics of the differences between the following memory barriers The windows MemoryBarrier The fence _mm_mfence The inline assembly.. lines of there is more than one way to implement memory barriers under the covers. c windows visual c memory barriers share.. barriers under the covers. c windows visual c memory barriers share improve this question Both MemoryBarrier MSVC and..
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