[API] How many time to be context-switched?

As a question I've made on Stackexchange <http://stackoverflow.com/questions/40579919/how-many-time-to-be-context-swit...>: I'm developing a real-time program where scheduler's context-switches might interfere its performance. --- Suppose I need to do many consecutive (but optional) operations (I mean I'm able to cancel some of them) of the same type in every execution of a timer-oriented signal handler. Could I check how much time left until my thread get context-switched? [...] and then I can cancel/jump some operations for a better performance at all. If yes, how can I do it (in C code)? Huge thanks! -- Ricardo Biehl Pasquali