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/* $OpenBSD: arc4random_solaris.h,v 1.1 2014/07/18 02:05:55 deraadt Exp $ */
/*
* Copyright (c) 1996, David Mazieres <dm@uun.org>
* Copyright (c) 2008, Damien Miller <djm@openbsd.org>
* Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
*
* Permission to use, copy, modify, and 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Stub functions for portability.
*/
static inline void *
_rs_allocate(size_t len)
{
void *p;
if ((p = mmap(NULL, sizeof(*rs), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
return (NULL);
return (p);
}
static inline void
_rs_forkhandler(void)
{
/*
* Race-free because we're running single-threaded in a new
* address space, and once allocated rs is never deallocated.
*/
if (rs)
rs->rs_count = 0;
}
static inline void
_rs_forkdetect(void)
{
static pid_t _rs_pid = 0;
pid_t pid = getpid();
/* If a system lacks MAP_INHERIT_ZERO, resort to getpid() */
if (_rs_pid == 0 || _rs_pid != pid) {
_rs_pid = pid;
if (rs)
rs->rs_count = 0;
}
}
static inline void
_rs_forkdetectsetup(struct _rs *rs, size_t len)
{
_ARC4_ATFORK(_rs_forkhandler);
}
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