llvm/llvm/include/llvm/Support/ExponentialBackoff.h

//===- llvm/Support/ExponentialBackoff.h ------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines a helper class for implementing exponential backoff.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXPONENTIALBACKOFF_H
#define LLVM_EXPONENTIALBACKOFF_H

#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/Error.h"
#include <chrono>
#include <random>

namespace llvm {

/// A class to help implement exponential backoff.
///
/// Example usage:
/// \code
///   ExponentialBackoff Backoff(10s);
///   do {
///     if (tryToDoSomething())
///       return ItWorked;
///   } while (Backoff.waitForNextAttempt());
///   return Timeout;
/// \endcode
class ExponentialBackoff { … };

} // end namespace llvm

#endif // LLVM_EXPONENTIALBACKOFF_H