simple_random.h

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/*
 * Copyright 2013 Google 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 PAGESPEED_KERNEL_UTIL_SIMPLE_RANDOM_H_
#define PAGESPEED_KERNEL_UTIL_SIMPLE_RANDOM_H_

#include "pagespeed/kernel/base/abstract_mutex.h"
#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/scoped_ptr.h"
#include "pagespeed/kernel/base/string.h"

namespace net_instaweb {

class SimpleRandom {
 public:
  explicit SimpleRandom(AbstractMutex* mutex)
      : z_(10), w_(25), mutex_(mutex) {}
  ~SimpleRandom() {}
  uint32 Next();
  inline uint32 NextLockHeld();

  GoogleString GenerateHighEntropyString(int size);

 private:
  uint32 z_;
  uint32 w_;
  scoped_ptr<AbstractMutex> mutex_;
};

}  

#endif