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c++ Programming Glossary: atomicallyrace-condition in pthread_once()? http://stackoverflow.com/questions/10843304/race-condition-in-pthread-once if your use is allowed void promise void set_value Effects atomically stores the value r in the shared state and makes that state..
When to make a type non-movable in C++11? http://stackoverflow.com/questions/14302834/when-to-make-a-type-non-movable-in-c11 applies to std atomic T objects unless they could be moved atomically it wouldn't be possible to safely move them another thread might..
Interlocked equivalent on Linux http://stackoverflow.com/questions/149710/interlocked-equivalent-on-linux on Win32 provide Specifically a lightweight way to atomically increment or add 32 or 64 bit integers c linux multithreading..
Do I need to synchronize std::condition_variable/condition_variable_any::notify_one http://stackoverflow.com/questions/15887306/do-i-need-to-synchronize-stdcondition-variable-condition-variable-anynotify not a bug. The standard requires that calling wait mx must atomically unlock mx and sleep. libstdc uses the internal mutex to provide..
How to atomically update a maximum value? http://stackoverflow.com/questions/16190078/how-to-atomically-update-a-maximum-value to atomically update a maximum value In serial code updating a maximum could..
http://stackoverflow.com/questions/17942034/simple-linux-signal-handling declare volatile sigatomic_t this type are always accessed atomically avoid uncertainty about interrupting access to a variable. volatile..
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 a global int foo and foo is read by one thread and set atomically by another thread probably using an appropriate machine instruction..
Lock Free Queue — Single Producer, Multiple Consumers http://stackoverflow.com/questions/2702328/lock-free-queue-single-producer-multiple-consumers otherwise the head and tail pointers can easily be updated atomically. Or in some cases the buffer can be so large that overwriting..
What exactly is a reentrant function? http://stackoverflow.com/questions/2799023/what-exactly-is-a-reentrant-function must be sure the modifications of c and of p will be done atomically using a recursive mutex not all mutexes are recursive struct..
Is volatile a proper way to make a single byte atomic in C/C++? http://stackoverflow.com/questions/4936289/is-volatile-a-proper-way-to-make-a-single-byte-atomic-in-c-c Or in other words Do CPUs read and write bytes always atomically c c atomic share improve this question Not only does the.. wrong question. CPUs typically read and write single bytes atomically. The problem comes because when you have multiple cores not..
Atomicity in C++ : Myth or Reality http://stackoverflow.com/questions/5002046/atomicity-in-c-myth-or-reality basic memory operations will always be carried out atomically Reading or writing a byte Reading or writing a word aligned.. additional memory operations will always be carried out atomically Reading or writing a quadword aligned on a 64 bit boundary 16.. additional memory operation will always be carried out atomically Unaligned 16 32 and 64 bit accesses to cached memory that fit..
http://stackoverflow.com/questions/5671241/how-does-weak-ptr-work you try to obtain a shared_ptr from a weak_ptr the library atomically checks the use count and if it's 0 increments it. If that succeeds.. the first reason Checking two pointer sized counters atomically is not possible on every platform and even where it is it's..
Concurrent writes in the same global memory location http://stackoverflow.com/questions/5953955/concurrent-writes-in-the-same-global-memory-location global write. You can either use a shared memory flag set atomically or a reduction operation to determine whether the value should..
Accessing atomic<int> of C++0x as non-atomic http://stackoverflow.com/questions/7234270/accessing-atomicint-of-c0x-as-non-atomic . At some places I don't need to access the value in it atomically as I just check if its 0 or not. In other words at those instances.. is atomic access. How can I access the atomic variable non atomically. Is typecasting it with int enough like as follows If not which..
What does the “lock” instruction mean in x86 assembly? http://stackoverflow.com/questions/8891067/what-does-the-lock-instruction-mean-in-x86-assembly stack into the ecx register then it does lock incl ecx to atomically increment that variable by 1. The next two instructions set..
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