ucontext(FP)

ucontext -- user context

Description

The <ucontext.h> header file defines the user context for an executing process and includes the following members:

   ucontext_t	uc_link
   sigset_t	uc_sigmask
   stack_t		uc_stack
   mcontext_t	uc_mcontext

The uc_link field is a pointer to the context to be resumed when the context returns. This context is the main context when uc_link is set to zero; the process exits when this context returns.

uc_sigmask defines a set of signals to be blocked when the context is active (see sigprocmask(S)).

uc_stack defines the stack to be used by the context (see sigaltstack(S)).

uc_mcontext contains the set of saved machine registers. Note that this field should not be accessed or modified by applications intended to be portable.

Standards conformance

<ucontext.h> is conformant with:
AT&T SVID Issue 3.

ucontext(FP)

Description

See also

Standards conformance