-Avoid #ifdefs. Agreed. If you need, put the ifdef code in a utility/library. e.g., instead of ifdef'ing your code for pthreads and windows threads, build a si

-Avoid #ifdefs. Agreed. If you need, put the ifdef code in a utility/library. e.g., instead of ifdef'ing your code for pthreads and windows threads, build a simple thread library to abstract the two to a common api.