ucontext(5) [osf1 man page]

ucontext(5)							File Formats Manual						       ucontext(5)

NAME

       ucontext - user context

SYNOPSIS

       #include <ucontext.h>

DESCRIPTION

       The  thread  of control within an executing process is specified by the ucontext structure.  This structure contains at least the following
       members:

       ucontext_t  uc_link
	      sigset_t	  uc_sigmask
	      stack_t	  uc_stack
	      mcontext_t  uc_mcontext

       The values for each member is as follows: Points to the context that is to continue when this context returns. If uc_link is equal to  zero
       (0),  this  is  the main context, and the process exits when this context returns.  Specifies the set of signals that are blocked when this
       context is active.  See sigprocmask(2) for more information.  Specifies the stack used by this context.	See sigaltstack(2) for more infor-
       mation.	Contains the saved machine registers and any implementation-specific context data.

RESTRICTIONS

       Portable applications should not access or modify the uc_mcontext value in the ucontext structure.

SEE ALSO

       Functions: getcontext(2), sigaction(2), sigprocmask(2), sigaltstack(2).

																       ucontext(5)

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 5.10							    30 Aug 2002 						 ucontext.h(3HEAD)