All functions listed here are thread-agnostic and only a single thread may operate on a
given object at any given time. Different threads may access the same object at different times. Multiple
independent objects may be used from different threads in parallel.
All functions listed here are thread-safe and may be called in parallel from multiple threads.
The code described here uses
getenv3,
which is declared to be not multi-thread-safe. This means that the code calling the functions described
here must not call
setenv3
from a parallel thread. It is recommended to only do calls to setenv()
from an early phase of the program when no other threads have been started.