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ucontext(5)
user context
From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.
NAME
ucontext - user context
SYNOPSIS
#include <ucontext.h>
DESCRIPTION
The ucontext structure defines the context of a thread of control within an executing process.
This structure includes at least the following members:
ucontext_t uc_link sigset_t uc_sigmask stack_t uc_stack mcontext_t uc_mcontext
uc_link is a pointer to the context that to be resumed when this context returns. If uc_link is equal to 0, then this context is the main context, and the process exits when this context returns.
uc_sigmask defines the set of signals that are blocked when this context is active [see sigprocmask(2)].
uc_stack defines the stack used by this context [see sigaltstack(2)].
uc_mcontext contains the saved set of machine registers and any implementation specific context data. Portable applications should not modify or access uc_mcontext.
SEE ALSO
getcontext(2), sigaction(2), sigprocmask(2), sigaltstack(2), makecontext(3C).