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), sigaltstack(2), sigprocmask(2), makecontext(3C)

SunOS 5.6  —  Last change: 3 Jul 1990