A C++ discussion group I participated in got a challenge last week. Someone posted a short Perl program, and claimed that it was faster than the corresponding C version. 1,199 more words
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Optimistic concurrency control is a technique used for concurrency.
- It is used in databases and internally by concurrent data structure libraries
- It assumes that actions will generally complete without contention, so proceeds to perform the update immediately, then checks afterwards if the action can be committed or must be rolled back… 47 more words
The volatile qualifier is used for removing the compiler optimization for variables defined in C/C++.
Normal variable definition
In the above case, the compiler optimization exists, that is unless there is an assignement for the variable, it is considerered not to change and the value would be cached and when accessed would return the cached value rather than reading from the memory. 613 more words
If you’ve ever been in the frustrating situation of having a crash report from a machine where crash dumps are not enabled, then you’ve probably been left scratching your head wondering what to do. 821 more words