10.21 setcontext

POSIX specification: http://www.opengroup.org/susv3xsh/setcontext.html

Gnulib module: —

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

• This function is missing on some platforms: Mac OS X 10.4, OpenBSD 3.8, Cygwin, mingw, MSVC 9, Interix 3.5, BeOS.
• The effects of this call are system and compiler optimization dependent, since it restores the contents of register-allocated variables but not the contents of stack-allocated variables.