kc3-lang/angle/util/random_utils.h

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• Hash : 9f088621
  Author :
  Date : 2018-12-29T20:46:15
  

  Revert "Load entry points dynamically in tests and samples."
  
  This reverts commit 03923558a7103827ffec6a4d2a1453ed91f01c6f.
  
  Reason for revert: fails compilation on Android, ChromeOS and Fuchsia during roll https://chromium-review.googlesource.com/c/chromium/src/+/1392624
  
  Original change's description:
  > Load entry points dynamically in tests and samples.
  > 
  > This CL adds a dynamic loader generator based on XML files. It also
  > refactors the entry point generation script to move the XML parsing
  > into a helper class.
  > 
  > Additionally this includes a new GLES 1.0 base header. The new
  > header allows for function pointer types and hiding prototypes.
  > 
  > All tests and samples now load ANGLE dynamically. In the future this
  > will be extended to load entry points from the driver directly when
  > possible. This will allow us to perform more accurate A/B testing.
  > 
  > The new build configuration leads to some tests having more warnings
  > applied. The CL includes fixes for the new warnings.
  > 
  > Bug: angleproject:2995
  > Change-Id: I6726d4163f7a6e54d2482f094c0a952f59702a05
  > Reviewed-on: https://chromium-review.googlesource.com/c/1359516
  > Commit-Queue: Jamie Madill <jmadill@chromium.org>
  > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  
  TBR=ynovikov@chromium.org,jmadill@chromium.org,syoussefi@chromium.org
  
  Change-Id: I902bec2d733c2b879be29c02ab52a0b7d4eaa077
  No-Presubmit: true
  No-Tree-Checks: true
  No-Try: true
  Bug: angleproject:2995
  Reviewed-on: https://chromium-review.googlesource.com/c/1392381
  Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
  Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
  

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• util/random_utils.h

• //
  // Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // random_utils:
  //   Helper functions for random number generation.
  //
  
  #ifndef UTIL_RANDOM_UTILS_H
  #define UTIL_RANDOM_UTILS_H
  
  // TODO(jmadill): Rework this if Chromium decides to ban <random>
  #include <random>
  #include <vector>
  
  #include <export.h>
  
  namespace angle
  {
  
  class ANGLE_EXPORT RNG
  {
    public:
      // Seed from clock
      RNG();
      // Seed from fixed number.
      RNG(unsigned int seed);
      ~RNG();
  
      void reseed(unsigned int newSeed);
  
      bool randomBool(float probTrue = 0.5f);
      int randomInt();
      int randomIntBetween(int min, int max);
      unsigned int randomUInt();
      float randomFloat();
      float randomFloatBetween(float min, float max);
      float randomFloatNonnegative();
      float randomNegativeOneToOne();
  
      template <class T>
      T &randomSelect(std::vector<T> &elements)
      {
          return elements[randomIntBetween(0, static_cast<int>(elements.size()) - 1)];
      }
  
      template <class T>
      const T &randomSelect(const std::vector<T> &elements)
      {
          return elements.at(randomIntBetween(0, static_cast<int>(elements.size()) - 1));
      }
  
    private:
      std::default_random_engine mGenerator;
  };
  
  // Implemented inline to avoid cross-module allocation issues.
  inline void FillVectorWithRandomUBytes(RNG *rng, std::vector<uint8_t> *data)
  {
      for (size_t i = 0; i < data->size(); ++i)
      {
          (*data)[i] = static_cast<uint8_t>(rng->randomIntBetween(0, 255));
      }
  }
  
  inline void FillVectorWithRandomUBytes(std::vector<uint8_t> *data)
  {
      RNG rng;
      FillVectorWithRandomUBytes(&rng, data);
  }
  
  }  // namespace angle
  
  #endif  // UTIL_RANDOM_UTILS_H
  

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