| // Copyright 2017 The Abseil Authors. | |
| // | |
| // 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 | |
| // | |
| // https://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. | |
| // | |
| // ----------------------------------------------------------------------------- | |
| // File: seed_gen_exception.h | |
| // ----------------------------------------------------------------------------- | |
| // | |
| // This header defines an exception class which may be thrown if unpredictable | |
| // events prevent the derivation of suitable seed-material for constructing a | |
| // bit generator conforming to [rand.req.urng] (eg. entropy cannot be read from | |
| // /dev/urandom on a Unix-based system). | |
| // | |
| // Note: if exceptions are disabled, `std::terminate()` is called instead. | |
| namespace absl { | |
| ABSL_NAMESPACE_BEGIN | |
| //------------------------------------------------------------------------------ | |
| // SeedGenException | |
| //------------------------------------------------------------------------------ | |
| class SeedGenException : public std::exception { | |
| public: | |
| SeedGenException() = default; | |
| ~SeedGenException() override; | |
| const char* what() const noexcept override; | |
| }; | |
| namespace random_internal { | |
| // throw delegator | |
| [[noreturn]] void ThrowSeedGenException(); | |
| } // namespace random_internal | |
| ABSL_NAMESPACE_END | |
| } // namespace absl | |