source/fuzz/counter_overflow_id_source.h

   1 // Copyright (c) 2020 Google LLC
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #ifndef SOURCE_FUZZ_COUNTER_OVERFLOW_ID_SOURCE_H_
  16 #define SOURCE_FUZZ_COUNTER_OVERFLOW_ID_SOURCE_H_
  17
  18 #include "source/fuzz/overflow_id_source.h"
  19
  20 namespace spvtools {
  21 namespace fuzz {
  22
  23 // A source of overflow ids that uses a counter to provide successive ids from
  24 // a given starting value.
  25 class CounterOverflowIdSource : public OverflowIdSource {
  26  public:
  27   // |first_available_id| is the starting value for the counter.
  28   explicit CounterOverflowIdSource(uint32_t first_available_id);
  29
  30   // Always returns true.
  31   bool HasOverflowIds() const override;
  32
  33   // Returns the current counter value and increments the counter.
  34   // TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/2541) We should
  35   //  account for the case where the maximum allowed id is reached.
  36   uint32_t GetNextOverflowId() override;
  37
  38   const std::unordered_set<uint32_t>& GetIssuedOverflowIds() const override;
  39
  40  private:
  41   uint32_t next_available_id_;
  42
  43   std::unordered_set<uint32_t> issued_ids_;
  44 };
  45
  46 }  // namespace fuzz
  47 }  // namespace spvtools
  48
  49 #endif  // SOURCE_FUZZ_OVERFLOW_ID_SOURCE_COUNTER_H_