src/kudu/util/random_util.h

// Copyright 2014 Cloudera, Inc.
//
// 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
//
//     http://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.

#ifndef KUDU_UTIL_RANDOM_UTIL_H
#define KUDU_UTIL_RANDOM_UTIL_H

#include <cstdlib>
#include <stdint.h>

namespace kudu {

class Random;

// Writes exactly n random bytes to dest using the parameter Random generator.
// Note RandomString() does not null-terminate its strings, though '\0' could
// be written to dest with the same probability as any other byte.
void RandomString(void* dest, size_t n, Random* rng);

// Generate a 32-bit random seed from several sources, including timestamp,
// pid & tid.
uint32_t GetRandomSeed32();

} // namespace kudu

#endif // KUDU_UTIL_RANDOM_UTIL_H