UCONTEXT.H(3HEAD) Headers UCONTEXT.H(3HEAD)


NAME


ucontext.h, ucontext - user context

SYNOPSIS


#include <ucontext.h>


DESCRIPTION


The <ucontext.h> header defines the ucontext_t type as a structure that
includes at least the following members:

ucontext_t uc_link
sigset_t uc_sigmask
stack_t uc_stack
mcontext_t uc_mcontext


The uc_link member is a pointer to the context that to be resumed when
this context returns. If uc_link is equal to 0, this context is the main
context and the process exits when this context returns.


The uc_sigmask member defines the set of signals that are blocked when
this context is active. See sigprocmask(2).


The uc_stack member defines the stack used by this context. See
sigaltstack(2).


The uc_mcontext member contains the saved set of machine registers and
any implementation-specific context data. Portable applications should
not modify or access uc_mcontext.

ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+

SEE ALSO


getcontext(2), sigaction(2), sigaltstack(2), sigprocmask(2),
makecontext(3C), attributes(5), standards(5)


August 30, 2002 UCONTEXT.H(3HEAD)