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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)

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