Threads

Interix does not support threads. Rewrite code that uses threads to use processes instead of threads or rewrite the application for Win32. Chapter 4, Assessment and Analysis, recommended that threaded code should not be migrated to Interix because it takes significant effort to rewrite the code to use processes. Because ease of migration is what motivates most migrations to Interix, it is better to put that effort into a rewrite to Win32.

Because Interix doesn t support threads, it also doesn t provide the reentrant-safe function variants defined by the UNIX standards. These functions are named for the non-reentrant version of the same function but have _r appended to their names ” for example, although Interix supports getpwent() , it does not support getpwent_r() . In the absence of threads, all of the reentrant-safe functions can be replaced by their non-reentrant versions. The conversion is straightforward.