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61 lines
1.6 KiB
61 lines
1.6 KiB
4 months ago
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/*
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* Copyright (C) 2019 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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#pragma once
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#include <dirent.h>
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#include <sys/types.h>
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#include <iterator>
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#include <memory>
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#include <vector>
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namespace android {
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namespace base {
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class AllPids {
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class PidIterator {
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public:
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PidIterator(DIR* dir) : dir_(dir, closedir) { Increment(); }
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PidIterator& operator++() {
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Increment();
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return *this;
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}
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bool operator==(const PidIterator& other) const { return pid_ == other.pid_; }
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bool operator!=(const PidIterator& other) const { return !(*this == other); }
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long operator*() const { return pid_; }
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// iterator traits
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using difference_type = pid_t;
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using value_type = pid_t;
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using pointer = const pid_t*;
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using reference = const pid_t&;
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using iterator_category = std::input_iterator_tag;
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private:
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void Increment();
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pid_t pid_ = -1;
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std::unique_ptr<DIR, decltype(&closedir)> dir_;
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};
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public:
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PidIterator begin() { return opendir("/proc"); }
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PidIterator end() { return nullptr; }
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};
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} // namespace base
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} // namespace android
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