libucontext_posix: add posixly-correct wrapper around libucontext

pull/23/head
Ariadne Conill 2020-12-08 17:06:09 -07:00
parent 045e622971
commit 27d8a515e1
1 changed files with 45 additions and 0 deletions

45
libucontext_posix.c Normal file
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/*
* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* This software is provided 'as is' and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising
* from the use of this software.
*/
#include <stddef.h>
#include <libucontext/libucontext.h>
#ifdef FREESTANDING
# error libucontext_posix cannot be built in FREESTANDING mode.
#endif
int
getcontext(libucontext_ucontext_t *ucp)
{
if (sigprocmask(SIG_SETMASK, NULL, &ucp->uc_sigmask))
return -1;
return libucontext_getcontext(ucp);
}
int
setcontext(const libucontext_ucontext_t *ucp)
{
if (sigprocmask(SIG_SETMASK, &ucp->uc_sigmask, NULL))
return -1;
return libucontext_setcontext(ucp);
}
int
swapcontext(libucontext_ucontext_t *oucp, const libucontext_ucontext_t *ucp)
{
if (sigprocmask(SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask))
return -1;
return libucontext_swapcontext(oucp, ucp);
}