/* Copyright (c) 2017, Google Inc.

 *

 * 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.

 *

 * 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. */

#include <openssl/rand.h>

#include <stdlib.h>

#include "../fipsmodule/rand/internal.h"

#include "../internal.h"

// g_buffering_enabled is one if fork-unsafe buffering has been enabled and zero

// otherwise.

static CRYPTO_atomic_u32 g_buffering_enabled = 0;

#if !defined(OPENSSL_WINDOWS)

void RAND_enable_fork_unsafe_buffering(int fd) {

  // We no longer support setting the file-descriptor with this function.

  if (fd != -1) {

    abort();

  }

  CRYPTO_atomic_store_u32(&g_buffering_enabled, 1);

}

void RAND_disable_fork_unsafe_buffering(void) {

  CRYPTO_atomic_store_u32(&g_buffering_enabled, 0);

}

#endif

int rand_fork_unsafe_buffering_enabled(void) {

  return CRYPTO_atomic_load_u32(&g_buffering_enabled) != 0;

}