# Common Helper Functions

> The SDK directory `samples/native/common` contains a number of C API header and source files that implement platform specific features and helper functions the are used by most of the SDK samples. These helper functions perform operations common to most of the samples that have been isolated here to keep the sample code minimal so that each sample can demonstrate a specific feature or functionality with the least amount of repetitious code that is not relevant to that feature. It is also helpful to locate here much of the operating-system-dependent code necessary for all eXtremeDB supported platforms.

> See page Samples Helper Functions in C for descriptions of the individual helper functions.