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82 lines
2.3 KiB
82 lines
2.3 KiB
4 months ago
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/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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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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#ifndef CUTTLEFISH_COMMON_COMMON_LIBS_FS_SHARED_SELECT_H_
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#define CUTTLEFISH_COMMON_COMMON_LIBS_FS_SHARED_SELECT_H_
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#include <set>
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#include "common/libs/fs/shared_fd.h"
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namespace cuttlefish {
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/**
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* The SharedFD version of fdset for the Select call.
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*
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* There are two types of methods. STL inspired methods and types use
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* all_lowercase_underscore notation.
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*
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* Methods that are inspired by POSIX Use UpperCamelCase.
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*
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* Assume that any mutation invalidates all iterators.
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*/
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class SharedFDSet {
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public:
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// These methods and types have more to do with the STL than POSIX,
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// so I'm using STL-compatible notation.
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typedef std::set<SharedFD>::iterator iterator;
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typedef std::set<SharedFD>::const_iterator const_iterator;
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iterator begin() { return value_.begin(); }
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iterator end() { return value_.end(); }
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const_iterator begin() const { return value_.begin(); }
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const_iterator end() const { return value_.end(); }
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void swap(SharedFDSet* rhs) {
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value_.swap(rhs->value_);
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}
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void Clr(const SharedFD& in) {
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value_.erase(in);
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}
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bool IsSet(const SharedFD& in) const {
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return value_.count(in) != 0;
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}
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void Set(const SharedFD& in) {
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value_.insert(in);
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}
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void Zero() {
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value_.clear();
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}
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private:
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std::set<SharedFD> value_;
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};
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/**
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* SharedFD version of select.
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*
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* read_set, write_set, and timeout are in/out parameters. This caller should keep
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* a copy of the original values if it wants to preserve them.
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*/
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int Select(SharedFDSet* read_set, SharedFDSet* write_set,
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SharedFDSet* error_set, struct timeval* timeout);
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} // namespace cuttlefish
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#endif // CUTTLEFISH_COMMON_COMMON_LIBS_FS_SHARED_SELECT_H_
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