// Copyright 2017 The BoringSSL Authors

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#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;

#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;

}