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#   		 Crown Copyright (c) 1997

#   

#   This TenDRA(r) Computer Program is subject to Copyright

#   owned by the United Kingdom Secretary of State for Defence

#   acting through the Defence Evaluation and Research Agency

#   (DERA).  It is made available to Recipients with a

#   royalty-free licence for its use, reproduction, transfer

#   to other parties and amendment for any purpose not excluding

#   product development provided that any such use et cetera

#   shall be deemed to be acceptance of the following conditions:-

#   

#       (1) Its Recipients shall ensure that this Notice is

#       reproduced upon any copies or amended versions of it;

#   

#       (2) Any amended version of it shall be clearly marked to

#       show both the nature of and the organisation responsible

#       for the relevant amendment or amendments;

#   

#       (3) Its onward transfer from a recipient to another

#       party shall be deemed to be that party's acceptance of

#       these conditions;

#   

#       (4) DERA gives no warranty or assurance as to its

#       quality or suitability for any purpose and DERA accepts

#       no liability whatsoever in relation to any use to which

#       it may be put.

#

+SUBSET "sig" := {

    # for unix95:signal.h

    +USE "unix95", "sys/types.h" ;

    +IMPLEMENT "posix", "signal.h", "sigset_t" ;

    +TYPE mcontext_t ;

    +FIELD ( struct ) stack_t {

	void *ss_sp ;

	size_t ss_size ;

	int ss_flags ;

    } ;

    +FIELD ( struct ) ucontext_t {

	ucontext_t *uc_link ;

	sigset_t uc_sigmask ;

	stack_t uc_stack ;

	mcontext_t uc_mcontext ;

    } ;

} ;

+FUNC int getcontext ( ucontext_t * ) ;

+FUNC int setcontext ( const ucontext_t * ) ;

+FUNC void makecontext ( ucontext_t *, void (*) ( int ), int, ... ) ;

+FUNC int swapcontext ( ucontext_t *, const ucontext_t * ) ;