18 years ago rsc
Use gcc -ansi -pedantic in 9c. Fix many non-C89-isms.
add procwait
add threadidle
add threadid
19 years ago rsc
add threaddata; correct Alt order
add threadgetname
fix typo
add threadspawnl
do not call exits in threaded programs
Many small edits.
add threadnotify
autolib
add threadlinklibrary
add threaddaemonize(), more bug fixes
yield now returns the number of switches done