c++ Programming Glossary: accesses

http://stackoverflow.com/questions/16699247/what-is-cache-friendly-code

the ordering is exploited this will result in fewer memory accesses because the next few values which are needed for subsequent.. M 1 0 memory M 1 1 cached 1 2 3 4 2 cache hits 2 memory accesses Not exploiting the ordering e.g. changing row index first in.. M 0 1 memory M 1 1 memory 1 3 2 4 0 cache hits 4 memory accesses In this simple example exploiting the ordering approximately..

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

do so it is effectively unnecessary. For thread safe accesses to shared data we need a guarantee that the read write actually.. different volatile reads writes . All volatile memory accesses will occur in the order in which they're specified. That is.. used to synchronize access to non volatile data. Those accesses can still be reordered relative to the volatile ones. The solution..

Optimizing away a “while(1);” in C++0x

http://stackoverflow.com/questions/3592557/optimizing-away-a-while1-in-c0x

the loop does something with visible behavior performs I O accesses volatile objects or performs synchronization or atomic operations..

When and why will an OS initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?

http://stackoverflow.com/questions/370195/when-and-why-will-an-os-initialise-memory-to-0xcd-0xdd-etc-on-malloc-free-new

is used to detect indexing arrays out of bounds or other accesses especially writes past the end or start of an allocated block...

Potential Problem in “Swapping values of two variables without using a third variable”

http://stackoverflow.com/questions/3741440/potential-problem-in-swapping-values-of-two-variables-without-using-a-third-var

of arguments of ^ operator is unspecified since all the accesses of b within the expression are being used to compute the final..

Undefined Behavior and Sequence Points

http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points

object is written to within a full expression any and all accesses to it within the same expression must be directly involved in.. constrains legal expressions to those in which the accesses demonstrably precede the modification. Example 1 std printf.. i i or a i i or a i i etc is disallowed because one of the accesses of i the one in a i has nothing to do with the value which ends..

C++ performance challenge: integer to std::string conversion

http://stackoverflow.com/questions/4351371/c-performance-challenge-integer-to-stdstring-conversion

will blow up on systems that disallow unaligned memory accesses in which case the first unaligned assignment via short would..

Friend scope in C++

http://stackoverflow.com/questions/437250/friend-scope-in-c

I could throw them. Though our children can not directly accesses the wireless they can get access to it if they go through us... member of another object even though there is no real accesses. So I am also automatically friends with all my clones as they..

Are C++ Reads and Writes of an int atomic

http://stackoverflow.com/questions/54188/are-c-reads-and-writes-of-an-int-atomic

like this is I've always synchronized these types of accesses but was curious what the community thought. c multithreading..

std::enable_if to conditionally compile a member function

http://stackoverflow.com/questions/6972368/stdenable-if-to-conditionally-compile-a-member-function

enable_if false type int foo The std enable_if false type accesses a non existing type so that declaration is ill formed. And thus..

Why is one loop so much slower than two loops?

http://stackoverflow.com/questions/8547778/why-is-one-loop-so-much-slower-than-two-loops

to be aligned to the page line . This means that all your accesses in each loop will fall on the same cache way. However Intel..