47 lines
2.0 KiB
C++
47 lines
2.0 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* Licensed under the Apache License Version 2.0 with LLVM Exceptions
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* https://llvm.org/LICENSE.txt
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <unifex/detail/prologue.hpp>
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namespace unifex
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{
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// Execution policies are used to describe constraints on the safe execution
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// of bulk operations with respect to each other.
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//
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// sequenced - Operations must be sequenced with respect to each other.
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// They are not safe to executed concurrently on differen threads or to
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// interleaved with each other on the same thread.
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//
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// unsequenced - Operations are safe to be interleaved with each other, e.g. using vectorised
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// SIMD instructions, but may not be executed concurrently on different
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// threads. This generally implies that forward progress of one operation
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// is not dependent on forward progress of other operations.
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//
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// parallel - Operations are safe to be executed concurrently with each other on different
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// threads but operations on each thread must not be interleaved.
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//
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// parallel_unsequenced - Operations are safe to be executed concurrently on different
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// threads and may be interleaved with each other on the same thread.
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inline constexpr struct sequenced_policy {} seq;
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inline constexpr struct unsequenced_policy {} unseq;
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inline constexpr struct parallel_policy {} par;
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inline constexpr struct parallel_unsequenced_policy {} par_unseq;
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}
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#include <unifex/detail/epilogue.hpp>
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