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man pages section 3: Library Interfaces and Headers

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Updated: Thursday, June 13, 2019
 
 

ucontext(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 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(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
Standard

See Also

getcontext(2), sigaction(2), sigaltstack(2), sigprocmask(2), makecontext(3C), attributes(7), standards(7)