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Diffstat (limited to 'absl/random/seed_gen_exception.h')
-rw-r--r-- | absl/random/seed_gen_exception.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/absl/random/seed_gen_exception.h b/absl/random/seed_gen_exception.h new file mode 100644 index 00000000..52afe6cc --- /dev/null +++ b/absl/random/seed_gen_exception.h @@ -0,0 +1,53 @@ +// 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. + +#ifndef ABSL_RANDOM_SEED_GEN_EXCEPTION_H_ +#define ABSL_RANDOM_SEED_GEN_EXCEPTION_H_ + +#include <exception> + +namespace absl { +inline namespace lts_2019_08_08 { + +//------------------------------------------------------------------------------ +// 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 +} // inline namespace lts_2019_08_08 +} // namespace absl + +#endif // ABSL_RANDOM_SEED_GEN_EXCEPTION_H_ |