////////////////////////////////////////////////////////////////////////////////
// Copyright 2017 Google LLC.
//
// This software is licensed under the terms defined in the Widevine Master
// License Agreement. For a copy of this agreement, please contact
// widevine-licensing@google.com.
////////////////////////////////////////////////////////////////////////////////

#ifndef UTIL_RANDOM_GLOBAL_ID_H_
#define UTIL_RANDOM_GLOBAL_ID_H_

#include "openssl/rand.h"

namespace widevine {
namespace util {
namespace random {

static uint64_t NewGlobalID() {
  static __thread uint64_t val = 0;
  if (val == 0) {
    RAND_bytes(reinterpret_cast<uint8_t*>(&val), sizeof(val));
  }
  return val++;
}

}  // namespace random
}  // namespace util
}  // namespace widevine

#endif  // UTIL_RANDOM_GLOBAL_ID_H_