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)SunOS 5.11 30 Aug 2002 ucontext.h(3HEAD)
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<ucontext.h>(P) POSIX Programmer's Manual <ucontext.h>(P)
NAME
ucontext.h - user context
SYNOPSIS
#include <ucontext.h>
DESCRIPTION
The <ucontext.h> header shall define the mcontext_t type through typedef.
The <ucontext.h> header shall define the ucontext_t type as a structure that shall include at least the following members:
ucontext_t *uc_link Pointer to the context that is resumed
when this context returns.
sigset_t uc_sigmask The set of signals that are blocked when this
context is active.
stack_t uc_stack The stack used by this context.
mcontext_t uc_mcontext A machine-specific representation of the saved
context.
The types sigset_t and stack_t shall be defined as in <signal.h> .
The following shall be declared as functions and may also be defined as macros, Function prototypes shall be provided.
int getcontext(ucontext_t *);
int setcontext(const ucontext_t *);
void makecontext(ucontext_t *, void (*)(void), int, ...);
int swapcontext(ucontext_t *restrict, const ucontext_t *restrict);
The following sections are informative.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
<signal.h> , the System Interfaces volume of IEEE Std 1003.1-2001, getcontext(), makecontext(), sigaction(), sigprocmask(), sigaltstack()
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE /The Open Group 2003 <ucontext.h>(P)